DECKS Flashcards
A stray crown is found in your office. It is an anterior tooth and has a cingulum that is offset from the center. What tooth is it most likely to be?
A. maxillary canine
B. maxillary lateral incisor
C. mandibular lateral incisor
D. mandibular central incisor
D. Mandibular lateral incisor
Which characteristic below is common to all mandibular anterior teeth?
A. distinct congula with grooves and pits
B. incisal edges that are facial to the root axis line
C. facial surfaces that are marked by pronounced labial ridges
D. continuous convexity incisoapically on the facial surface
D. continuous convexity incisoapically on the facial surface
A clinical examination of your patient reveals two lower incisors centered on the midline. The patient gives a history of a car accident When he was young he lost two of his lower front teeth. He says that his dentist used braces to fill in the gaps. Which of the
following criteria would be most reliable to decide if the remaining teeth were lateral or central incisors?
A. difference in root length
B. difference in the ratio of crown length to root length
C. degree of slope of the incisal edge when viewed facially
D. difference in rotation of the crown on the root
D. difference in rotation of the crown on the root
The mesial and distal aspects of the anterior teeth - central incisors, lateral incisors, and canines, maxillary and mandibular - may be included within triangles. The base of the triangle is represented by the cervical portion of the crown and the apex by the incisal ridge.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
A. both statements are true
Which of the following statements best describes the pulp canal of the mandibular lateral incisor?
A. an elliptical shape, consistently wider in the mesiodistal direction
B. an elliptical shape, consistently wider in the faciolingual direction
C. an elliptical shape, wider in the mesiodistal direction in the pulp chamber, but wider in the faciolingual direction in the mid-root area
D. an elliptical shape, wider in the faciolingual direction in the pulp chamber, but wider in the mesiodistal direction in the mid-root area
C. an elliptical shape, wider in the mesiodistal direction in the pulp
chamber, but wider in the faciolingual direction in the mid-root area
Which of the following line angles is the least “square”?
A. mesioincisal of the mandibular lateral incisor
B. disto incisal of the mandibular lateral incisor
C. mesioincisal of the mandibular central incisor
D. distoincisal of the mandibular central incisor
C. distoincisal of the mandibular lateral incisor
Which tooth has a pulp chamber that is least like the others?
A. maxillary central incisor
B. mandibular central incisor
C. maxillary lateral incisor
D. mandibular lateral incisor
A. Maxillary central incisor
When looking at the facial or lingual aspect of an anterior teeth, they have a:
A. trapezoidal outline
B. triangular outline
C. rhomboidal outline
D. square outline
A. trapezoidal outline
In maximum intercuspation, which anterior tooth is unique in that it contacts with both anterior and posterior segments of the opposite
arch?
A. maxillary first premolar
B. maxillary canine
C. mandibular first premolar
D. mandibular canine
B. maxillary canine
A hockey player comes into your office with his six upper anterior teeth in his hand. How can you distinguish the right canine from the left canine?
A. the root always curves to the distal in the apical one-third
B. the distal surface is fuller and more convex than the mesial surface
C. labially, the cusp tip is placed distal to a line which bisects the crown and root
D. lingually, the cervical line slopes mesially
B. The distal surface is fuller and more convex than the mesial surface
Which of the following terms is specific to canines?
A. labial ridge
B. lingual fossa
C. mamelons
D. cingulum
B. labial ridge
A mother brings her three kids to your office for their annual check ups. Which of the following statements is most likely to be true?
A. the middle child is 11 and has no adult canine teeth
B. the youngest child is 10 and has a adult mandibular canines only
C. the oldest child is 12 and has m axillary canines only
D. the youngest child is 10 and has adult maxillary canines only
E. the oldest child is 12 and has mandibular canines only
B. the youngest child is 10 and has adult mandibular canines only
A hockey player comes into your office holding his friend’s right canines (maxillary and mandibular) in his hand. His friend, a lacrosse player, got hit by a ball flying under his mask. Which of the following
would you look for in the maxillary canine as compared to the mandibular canine? Select all that apply.
A. it is narrower mesiodistally
B. it has a more pronounced cingulum
C. it is wider mesiodistally
D. it has a shorter root
B. it has a more pronounced cingulum
C. it is wider mesiodistally
Which cusp ridge is the longest on the permanent canines?
A. labial
B. lingual
C. mesial
D. distal
D. distal
A 7-year-old boy visits your dental office with his mom for a routine check-up. Which succedaneous teeth are expected to be present in the child’s mouth?
A. permanent mandibular first molars
B. permanent mandibular central incisors
C. permanent mandibular canines
D. permanent mandibular premolars
B. permanent mandibular central incisors
A mother brings her 1-year-old into your office the day after his first birthday. She says the pediatrician said to have the first dental check up by this time. What primary teeth are you expecting to see when
the child opens?
A. mandibular incisors only
B. maxillary incisors only
C. mandibular and maxillary incisors
D. all incisors and maxillary canines
E. all incisors and mandibular canines
F. all anterior teeth
C. mandibular and maxillary incisors
Tommy, a pediatric patient of yours, says he lost his top vampire tooth last week and the tooth fairy gave him a dollar for it. What is Tommy’s most likely age range when he lost his maxillary canine tooth?
A. 6-7 years old
B. 7-8 years old
C. 10 -12 years old
D. 14 -16 years old
D. 10-12 years old
Which of the following are the cardinal rules regarding the eruption of teeth?
Select all that apply.
A. boys’ teeth usually erupt before girls’ teeth of the same age
B. girls’ teeth usually erupt before boys’ teeth of the same age
C. maxillary teeth usually erupt before mandibular teeth
D. mandibular teeth usually erupt before maxillary teeth
E. the teeth of slender children usually erupt before the teeth of stocky children
F. the teeth of stock y children usually erupt before the teeth of slender children
B. girls’ teeth usually erupt before boys’ teeth of the same age
D. mandibular teeth usually erupt before maxillary teeth
E. the teeth of slender children usually erupt before the teeth of stocky children
A child in the ugly duckling stage of dental development belongs to which of the following age groups?
A. 1 to 6 years
B. 6 to 12 years
C. 12 to 18 years
D. 18 years and above
B. 6 to 12 years
A 15-month-old child walks into your office and begins to cry and hold his mouth in pain. Which teeth have probably not been traumatized, as they are not usually present at 15 months of age?
A. primary lateral incisors and canines
B. primary canines and first molars
C. primary canines and second molars
D. primary central and lateral incisors
E. primary first and second molars
C. primary canines and second molars
A pediatric patient of yours complains of severe pain on chewing. On clinical exam, you see an eruption cyst in the place of the mandibular second molar. What is the most likely age of this patient?
A. 8
B. 10
C. 12
D. 14
C. 12
At 9 years of age how many primary teeth are present in the mouth?
A. 0
B. 4
C. 8
D. 12
E. 18
D. 12
A 1-year-old child is expected to have erupted which of the following primary maxillary and mandibular teeth? Select all that apply.
A. central incisors
B. lateral incisors
C. canines
D. first molars
E. second molars
A. central incisors
B. lateral incisors
The teeth that are present at the time of birth are known as
A. primary teeth
B. natal teeth
C. neonatal teeth
D. prenatal teeth
B. Natal Teeth
A patient comes in with a chief complaint of, “My wife says I wake her up at night with scraping noises from my mouth.” On clinical exam you will expect to find which of the following characteristics of
his occlusal contacts?
A. point -to -point
B. point -to- area
C. edge -to -edge
D. edge -to- area
E. area -to- area
E. area -to- area
All posterior teeth have proximal contacts in the:
A. middle third
B. junction of the occlusal and middle third
C. occlusal third
D. cervical third
A. middle third
Which teeth crowns have the facial height of contour located in or near the cervical third?
A. anterior teeth (incisors and canines)
B. posterior teeth (premolars and molars)
C. only molars
D. all of the above
D. all of the above
Which of the following is true regarding proximal contact of teeth with their adjacent teeth in an arch?
A. helps prevent food from being trapped between the teeth
B. stabilizes the dental arch by holding teeth in positive contact with each
other
C. protects the interproximal gingival tissue from trauma during chewing
D. all of the above
D. all of the above
Cervical line (or CEJ) contours are closely related to the attachment of the gingiva at the neck of the tooth. When doing a crown prep, your
margin will slope with the contours of the cervical lines and gingival attachments. On which surfaces will your greatest contour be found?
A. distal surfaces of anterior teeth
B. distal surfaces of posterior teeth
C. mesial surfaces of anterior teeth
D. mesial surfaces of posterior teeth
C. mesial surfaces of anterior teeth
You are fabricating an interim bridge from 19 to 21. The contact areas on the pontic when viewed from the occlusal view, should be ______ of the tooth midline buccolingually.
A. directly in line
B. slightly to the lingual
C. slightly to the facial
C. slightly to the facial
The mesial contact area of a permanent maxillary lateral incisor is usually located:
A. in the incisal third
B. in the middle third
C. at the junction of the incisal and middle thirds
C. at the junction of the incisal and middle thirds
From a facial view, mesial and distal contact areas of mandibular central incisors are located:
A. in the middle third
B. at the junction of incisal and middle thirds
C. at the junction of cervical and middle thirds
D. cervical to the junction of incisal and middle thirds
E. incisal to the junction of incisal and middle thirds
E. incisal to the junction of incisal and middle thirds
The contact area on the mesial surface of a mandibular canine is located at the:
A. middle third
B. incisal third
C. cervical third
D. junction of the middle and cervical thirds
B. incisal third
Which of the following teeth has its mesial contact located within the incisal or the occlusal one third?
A. maxillary canine
B. maxillary first molar
C. mandibular second premolar
D. mandibular central incisor
D. mandibular central incisor
The lingual height of contour on a permanent mandibular second molar is located:
A. in the middle third
B. in the cervical third
C. in the occlusal third
D. at the junction of the cervical and middle thirds
E. at the junction of the middle and occlusal thirds
A. in the middle third
What is the location of facial height of contour of the anterior and posterior teeth?
A. occlusal third
B. lingual third
C. middle third
D. cervical third
D. cervical third
Concrescence is a type of fusion of the adjacent teeth through the deposition of alveolar bone.
Hypercementosis involves excessive deposition of cementum around the root which becomes continuous with the normal cementum of the
root.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
D. the first statement is false, the second is true
All of the following are variations from normal anatomy in the oral cavity EXCEPT one.
Which one is the EXCEPTION?
A. mandibular tori
B. exostoses
C. plica fimbriata
D. linea alba
C. plica fimbriata
Which of the following is the loss of tooth structure from non mechanical means?
A. attrition
B. abrasion
C. ankylosis
D. erosion
D. erosion
Agents (chemicals) that are capable of causing developmental abnormalities in utero are called teratogens. For each numbered teratogen listed below, select the most closely linked effect from the
list provided.
- Aspirin , valium , dilantin
and cigarette smoke (hypoxia) - Cytomegalovirus, toxoplasma
- Ethyl alcohol
- Rubella virus
- X-radiation
- Vitamin D excess
A. Microcephaly
B. Central mid -face discrepancy
C. Pre-mature suture closure
D. Cleft lip and palate
E. Microcephaly, hydrocephaly, microphthalmia
F. Microphthalmia, cataracts, deafness
- D
- E
- B
- F
- A
- C
As you know, there are several kinds of teeth in the human mouth. They all serve different functions. You are in an argument with your friend, a law student, and you test his vocabulary. You call him a
____________ , which simply means he has teeth with different morphologies and functions.
A. polyphyodont
B. monophyodont
C. heterodont
D. diphyodont
C. heterodont
A 12-year-old boy comes to your dental office with missing maxillary lateral incisors and mandibular second premolars. The child is said to have which of the following condition?
A. anodontia
B. oligodontia
C. hypodontia
D. hyperdontia
C. hypodontia
A child has maxillary incisor protrusion, an anterior open bite, crowded lower anteriors, and a high palatal vault. Which of the following most likely caused this problem?
A. mouth breathing
B. thumb sucking
C. tongue thrusting
D. using a pacifier
E. nocturnal bruxism
B. thumb sucking
(any other sucking habit)
A patient of yours has enamel hypocalcification. You would expect _____ quantity of enamel and would describe it as
A. less than normal; hard
B. less than normal; soft
C. normal; soft
D. normal; hard
E. more than normal; hard
F. more than normal; soft
C. normal; soft
Which of the following teeth have the most variability in form?
A. mandibular first premolars
B. maxillary first molars
C. mandibular second molars
D. maxillary lateral incisors
E. maxillary second premolars
D. maxillary lateral incisors
A mental foramen would be found on x-ray closest to the root of which tooth?
A. 19
B. 14
C. 29
D. 22
E. 4
A. 19
Pure rotation of the mandible involves which two planes of movement?
A. frontal
B. horizontal
C. sagittal
A. frontal
C. sagittal
Border movements are the limits to which the mandible can move, where as functional movements generally occur within the border
movements. The maximum opening movement is 50 to 60 mm, depending on the age and size of the individual.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
A. both statements are true
In the natural dentition, centric occlusion is, in a majority of people, _____ to centric relation contact and on the average approximately ____mm.
A. posterior; 2
B. anterior; 1
C. medial; 2
D. lateral; 1
B. anterior; 1
During sleep, the mandible is in its physiologic rest or postural position. The contact of teeth is:
A. maximum
B. not present
C. premature
D. slight
B. not present
Which of the following masticatory muscles is of the mandible during elevation?
A. the temporalis muscle
B. the digastric muscle
C. the geniohyoid muscle
D. the lateral pterygoid muscle
A. the temporalis muscle
A dental patient is complaining of unilateral jaw pain when chewing. You notice that she only chews on her right side. When a mandibular movement to the right is performed, which condyle moves forward,
downward, and medially?
A. working condyle (right)
B. non-working condyle (left)
B. non-working condyle (left)
Which of the following modalities can be used to treat symptoms of malocclusion by changing the shape of the teeth?
Select all that apply.
A. occlusal equilibration
B. full-mouth rehabilitation
C. orthodontic treatment
D. all of the above
A. occlusal equilibration
B. full-mouth rehabilitation
During a right working side movement, the right side molar teeth may contact along the buccal inclines of the maxillary buccal cusps and the lingual inclines of the mandibular buccal cusps. Mandibular protrusion will result in the mesiolinguai cusp of the maxillary first molar passing through the central groove toward the distal marginal ridge of the mandibular molar.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
D. the first statement is false, the second is true
Retrusive movement requires the condyles to move backward and upward. In protrusive movement, the condyles of the mandible have moved in a downward and forward direction.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
A. both statements are true
In regards to the picture below, the arrows indicate the path of _______ movement of mandibular teeth over the maxillary teeth on the _______ side.
A. right lateral; working
B. left lateral; working
C. right lateral; no n-working
D. left lateral; non-working
D. left lateral; non-working
Anterior guidance is a result of:
60
A. horizontal and vertical overlap
B. vertical and posterior cusp height
C. horizontal overlap and posterior cusp height
D. intercondylar distance and freeway space
E. intercondylar distance and postural vertical dimension
A. horizontal and vertical overlap
In a patient with a left canine protection, the mesiolingual surface of the maxillary right first molar contacts the distofacial surface of the
mandibular right first molar during a left lateral excursion. This contact is:
A. normal
B. evidence of group function
C. a working side interference
D. a non-working side interference
E. normal, and a non-workin g side interference
D. a non-working side interference
An endodontist is performing root canal therapy on a permanent maxillary first molar. Since he is a very thorough endodontist, he knows he should look for a fourth canal. Which root of a maxillary first molar commonly has two root canals?
A. the palatal root
B. the distobuccal root
C. the mesiobuccal root
D. none of the above
C. the mesiobuccal root
All of the following teeth show bifurcation from the root trunk
EXCEPT one. Which one is the EXCEPTION?
A. maxillary first premolar
B. mandibular second molar
C. maxillary second premolar
D. all of the above
C. maxillary second premolar
During a surgical extraction of the maxillary first molar, a rough oral surgeon accidentally perforates the maxillary sinus. If he perforated
the sinus with one of the roots of the first molar, which root is the most likely candidate, given that it is the largest, longest, and strongest of the three roots?
A. mesio buccal
B. disto buccal
C. palatal
C. palatal
From a developmental viewpoint, all mandibular molars have __ major cusps, whereas maxillary molars have only ______ major cusps.
A. 6 ; 5
B. 5 ; 4
C. 4 ; 3
D. 3 ; 2
C. 4 ; 3
A fissured groove is most frequently found on the:
A. facial surface of maxillary molars
B. lingual surface of maxillary molars
C. facial surface of mandibular molars
D. lingual surface of mandibular molars
B. lingual surface of maxillary molars
The photo below is a cervical cross section of the pulp cavity of a:
A. maxillary first molar
B. mandibular first molar
C. maxillary second molar
D. mandibular second molar
B. mandibular first molar
A dental student is performing root canal therapy on an extracted maxillary molar in her preclinical endodontics course. Her pre-operative radiograph shows four canals (two canals in the MB root).
She should expect the shape of the floor of the pulp chamber in this maxillary molar to be roughly:
A. square
B. rhomboidal
C. triangular
D. circular
C. triangular
The photo below is a buccolingual section of the pulp cavity of a:
A. a mandibular right first molar
B. a mandibular right second molar
C. a mandibular right third molar
A. a mandibular right first molar
From a mesial or distal aspect, all mandibular posterior teeth have a:
A. triangular outline
B. rhomboidal outline
C. trapezoidal outline
D. square outline
E. rectangular outline
B. rhomboidal outline
The distoiingual cusp on the permanent maxillary molars is also called a:
A. cusp of Carabelli
B. talon cusp
C. dense vaginatus
D. trigone
B. talon cusp
A dentist is completing a disto-occlusal restoration on a permanent maxillary first molar. He is carving the distal marginal ridge. He makes sure to give it width for support and must round it to create an
embrasure. In order to get the correct height occlusocervically, he should match the distal marginal ridge of the maxillary first molar to
the:
A. mesial marginal ridge of the maxillary second premolar
B. mesial marginal ridge of the mandibular first molar
C. mesial marginal ridge of the maxillary second molar
D. distal marginal ridge of the maxillary second premolar
C. mesial marginal ridge of the maxillary second molar
How many roots are visible from the buccal aspect of a maxillary first molar?
A. one root
B. two roots
C. three roots
D. four roots
C. three roots
Fibers from the ventral ramus of C l travel with the hypoglossal nerve (CN XII) to the geniohyoid and thyrohyoid. Fibers from the ventral rami of C1-C3 combine to form the ansa cervicalis, which gives off branches to the omohyoid, sternohyoid,
and sternothyroid.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
A. both statements are true
Which of the following suprahyoid muscles are innervated by the facial nerve?
Select all that apply.
A. mylohyoid muscle
B. anterior belly of digastric muscle
C. posterior belly of digastric muscle
D. stylohyoid muscle
E. geniohyoid muscle
C. posterior belly of digastric muscle
D. stylohyoid muscle
There are two sets of lingual muscles: extrinsic and intrinsic. The extrinsic muscles:
A. alter the shape of the tongue
B. move the tongue as a whole
C. all originate from the mandible
D. are all innervated by the hypoglossal nerve
B. move the tongue as a whole
Which muscle presses the cheek against molar teeth, working with the tongue to keep food between the occlusal surfaces and out of the
oral vestibule?
A. zygomaticus major
B. depressor labii inferioris
C. buccinator
D. levator angulioris
C. buccinator
A new patient comes in with a history of malignant cancer. When the patient opens, the mandible deviates to the left. You suspect a tumor
blocking nervous innervation to which muscle?
A. right medial pterygoid
B. left medial pterygoid
C. right lateral pterygoid
D. left lateral pterygoid
D. left lateral pterygoid
After seating a new crown on tooth #19 you need to check excursive movements. You ask the patient to slide her jaw to the right to make sure there are contacts on #19 during this movement. What muscle
does the patient use to move her jaw like this?
A. right medial pterygoid
B. left medial pterygoid
C. right lateral pterygoid
D. left lateral pterygoid
D. left lateral pterygoid
Retrusion (retruding the jaw) results from:
A. the bilateral contraction of the anterior (vertical) fibers of the temporalis muscle
B. the bilateral contraction of the posterior (horizontal) fibers of the temporalis muscle
C. the unilateral contraction of the anterior (vertical) fibers of the temporalis muscle
D. the unilateral contraction of the posterior (horizontal) fibers of the
temporalismuscle
B. the bilateral contraction of the posterior (horizontal) fibers of the temporalis muscle
A 22-year-old female dental student comes into your dental practice for a regular check-up. She states that she has never had any problems with her teeth, and upon examination you notice that only
one pair of teeth seem to have contact during lateral movements of the mandible. Which teeth should ideally provide the predominant guidance through the full range of movement in lateral mandibular
excursions?
A. premolars
B. first molars
C. incisors
D. canines
D. canines
In an ideal intercuspal position, the mesiobuccal cusp of the permanent maxillary first molar opposes the:
A. the disto buccal groove of the mandibular first molar
B. the buccal groove of the mandibular second molar
C. the mesiobuccal groove of the mandibular first molar
D. the developmental groove between the disto buccal and the dista l cusps of the mandibular first molar
C. the mesiobuccal groove of the mandibular first molar
An archaeologist consults a dentist about some findings he had on a dig. The teeth the archeologist finds have four cusps - two of them taller and pointed, two of them shorter, rounded, and dull. The dentist tells the archaeologist that these teeth are similar to our human molars. The broader, more rounded cusps are:
A. non-supporting and working
B. supporting and balancing
C. supporting and working
D. non-supporting and balancing
C. supporting and working
Which permanent teeth occlude with only one tooth in the opposite jaw, assuming ideal relations exist?
A. maxillary canines
B. maxillary central incisors
C. mandibular central incisors
D. mandibular third molars
C. mandibular central incisors
In an ideal intercuspal position, the facial cusp tip of a maxillary first premolar opposes the:
A. facial embrasure between the mandibular first and second premolars
B. facial embrasure between the mandibular second premolar and the mandibular first molar
C. opposing central fossa
D. opposing mesial marginal ridge
A. facial embrasure between the mandibular first and second premolars
In the intercuspal position, where does the mesiolingual cusp of a permanent maxillary first molar occlude?
A. the distal triangular fossa of first premolar
B. the distal triangular fossa of second premolar
C. the central fossa of the mandibular first molar
D. the distal marginal ridge of mandibular first molar
C. the central fossa of the mandibular first molar
In the intercuspal position, where does the distal cusp of a permanent mandibular first molar occlude?
A. the distal triangular fossa of the maxillary second premolar
B. the distal fossa of the maxillary first molar
C. the central fossa of the maxillary second molar
D. the mesial marginal ridge of the maxillary first molar and distal marginal
ridge of the maxillary second premolar
B. the distal fossa of the maxillary first molar
A dental student is finalizing the temporary crown he fabricated for his patient. The patient’s occlusion is in an ideal relationship, and the crown has ideal centric contacts. The student has a bad habit of
forgetting about working and balancing contacts. He does remember the rule that he should avoid laterotrusive contacts on the guiding cusps on posterior teeth. Which two of the following are considered to be guiding cusps?
A. maxillary lingual cusps
B. maxillary buccal cusps
C. mandibular lingual cusps
D. mandibular buccal cusps
B. maxillary buccal cusps
C. mandibular lingual cusps
In an ideal intercuspal position, the mesiolingual cusp of a permanent mandibular molar opposes:
A. the opposing central fossae
B. the lingual embrasure between their class counterpart and the tooth distal
to it
C. the opposing distal marginal ridge
D. the lingual embrasure between their class counterpart and the tooth
mesial to it
D. the lingual embrasure between their class counterpart and the tooth
mesial to it
The curve of Wilson is concave in the maxillary arch and convex in the mandibular arch.
The maximum intercuspation position yields the smallest measurement of vertical dimension.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
D. the first statement is false, the second is true
A patient presents to the dentist for examination and bites into centric occlusion. The permanent maxillary canine is found to be mesial to the mandibular canine. This type of occlusion is classified as:
A. class I
B. class II
C. class III
D. class IV
B. class II
Which of the following are the areas of centric contacts (centricstops).
Select all that apply.
A. marginal ridges
B. central fossae
C. height of cusp contour
B. central fossae
C. height of cusp contour
The basic principles for occlusal adjustment include all of the following EXCEPT one.
Which one is the EXCEPTION?
A. the maximum distribution of occlusal stresses incentric relation
B. the force s of occlusion should be borne as much as possible by the long
axis of the teeth
C. when there is surface -to- surface contact of flat cusps, it should be
changed to a point-to -surface contact
D. once centric occlusion is established, never take the teeth out of centric occlusion
E. when a slide from CR to ICP is natural, it should never be modified
E. when a slide from CR to ICP is natural, it should never be modified
The determinant factors of occlusion include all of the following EXCEPT one.
Which one is the EXCEPTION?
A. the temporomandibular joint
B. the masticatory muscles
C. the tongue and buccal mucosa position
D. the biomechanics of the temporomandibular joint
E. the dentition and the occlusal table
C. the tongue and buccal mucosa position
Anterior guidance (anterior coupling) is the guidance provided by the anterior teeth when the mandible goes into a lateral or protrusive movement. If anterior guidance can be accomplished, the least amount of force will be placed on the posterior teeth during lateral and protrusive movements.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
A. both statements are true
The centric relation (CR) is the most unstrained, retruded anatomic and functional position of the heads of the condyles or the mandible in the____ of the temporomandibular joints. This is a relationship of the ____ of the upper and lower jaws_____ tooth contact. The presence or absence of teeth, or the type of occlusion or malocclusion, _ _ _ factors.
A. mandibular fossae /bones /independent of/are not
B. mandibular foramen / teeth /dependent on /are
C. mandibular fossae /bones /dependent on /are
D. mandibular fossae /teeth /dependent on /are
E. mandibular foramen /bones /independent of/are not
A. mandibular fossae /bones /independent of/are not
A patient’s mother comes in to complain that her child’s upper front teeth rest in front of his lower lip. You explain to her that this is called
A. overjet
B. overbite
C. underjet
D. open bite
A. overjet
Generally, the deeper the curve of Spee, the more difficult it is to make and adjust interocclusal appliances that are used in the treatment of bruxism. Increasing the curve of Spee can reduce the vertical overlap of the teeth.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
C. the first statement is true, the second is false
Which of the following types of oral mucosa are keratinized under normal conditions?
Select all that apply.
A. vermillion border of the lips
B. hard palate
C. gingiva
D. buccal mucosa
E. dorsal surface of the tongue
A. vermillion border of the lips
B. hard palate
C. gingiva
E. dorsal surface of the tongue
The mandible functions as a:
A. class I lever
B. class II lever
C. class III lever
C. class III lever
The principal fibers of the periodontal ligament are arranged in four groups. The molecular configuration of collagen fibers in the periodontal
ligament provides them with a tensile strength greater than that of steel.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
D. the first statement is false, the second is true
The gingival fibers are arranged in five groups
is NOT one of those groups?
A. circular group
B. dento-gingival group
C. apical group
D. transseptal group
E. dento-periosteal group
F. alveolo-gingival group
C. apical group
What is the depth of the gingival sulcus in an ideal or absolutely normal (germ-free) condition?
A. 2 mm to 4 mm
B. 6 mm to 8 mm
C. 0 mm o r near to 0 mm
D. 1.5 mm to 1.8 mm
C. 0 mm o r near to 0 mm
Which of the following characteristics are observed in a diseased gingiva?
A. rolled-in margins
B. soft and spongy consistency throughout the gingiva
C. bleeding upon probing
D. all of the above
D. all of the above
The average width of the periodontal ligament is approximately 20 mm.
The width of the periodontal ligament decreases with increasing age.
A. both statements are true
B. both statements are false
C. the first statement is true, the second is false
D. the first statement is false, the second is true
D. the first statement is false, the second is true
All of the following statements are true regarding epithelial cell rests
of Malassez EXCEPT one. Which one is the EXCEPTION?
A. they are epithelial remnants of th e Hertwig’s epithelia l root sheath
B. they are present as isolated islands or clusters throughout the cementum
C. they play a role in periodontal regeneration
D. they can be the source of dental cysts
B. they are present as isolated islands or clusters throughout the cementum
Which of the following is NOT an age-related change in the periodontium?
A. decreased keratinization of the gingival epithelium
B. decrease in number of fibroblasts and epithelial cell rests in the periodontal ligament
C. decrease in the width of cementum
D. coarser and denser gingival connective tissues
C. decrease in the width of cementum
The attachment apparatus is composed of all of the following EXCEPT one. Which one is the EXCEPTION?
A. periodontal ligament
B. cementum
C. alveolar process of the maxillae and mandible
D. gingiva
D. gingiva
The principal fibers of the periodontal ligament are composed mainly
of collagen type I. The amount of collagen in a tissue can be determined by its glycine content.
A. both statements are true
B. both statements are false
C. the first statement is true , the second is false
D. the first statement is false, the second is true
C. the first statement is true, the second is false
The ground substance in the periodontal ligament consists of
proteoglycans. Gingival tissues show increased scarring after surgical procedures.
- the first statement is true, the second is false
- the second statement is true, the first is false
- both statements are true
- both statements are false
- the first statement is true, the second is false
The narrowest band of attached gingiva is found:
- on the lingual surfaces of maxillary incisors and the facial surfaces of
maxillary first molars - on the facial surfaces of mandibular second premolars and the lingual
surface of canines - on the facial surfaces of the mandibular canine and first premolar and the lingual surfaces adjacent to the mandibular incisors and canines
- none of the above
on the facial surfaces of the mandibular canine and first premolar and the lingual surfaces adjacent to the mandibular incisors and canines
Which tooth is most likely to be unnecessarily endodontically treated by a novice dentist who sees a radiolucency on the radiograph?
- mandibular canine
- mandibular second premolar
- mandibular first molar
- maxillary first premolar
mandibular second premolar
Which tooth has a mesial marginal ridge that is distinctly shorter in length and less prominent in height than the distal marginal ridge?
- maxillary se cond prem ola r
- mandibular first premolar
- mandibular second premolar
- maxillary first premolar
mandibular first premolar
On mandibular premolars, the lingual cusps are much smaller than the buccal cusps. On maxillary premolars, the buccal cusps are smaller than the lingual cusps.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is true, the second is false
Which premolar is the only one that has
that is longer than its distal buccal cuspames ridge?
- mandibular first premolar
- mandibular second premolar
- maxillary first premolar
- maxillary second premolar
maxillary first premolar
The largest of all the premolars are the
the ___ and the smallest are ___.
- maxillary first, mandibular first
- maxillary first, mandibular second
- maxillary second, mandibular first
- maxillary second, mandibular second
maxillary first, mandibular first
A hockey player comes into your office with both of his maxillary right premolars in hand. Which of the following characteristics would
you NOT use to distinguish the first from the second maxillary premolar?
- number of roots
- symmetry (one is more symmetrical than the other)
- mesial to distal cusp ridge ratio
- presence of mesio-lingual developmental groove
- central groove size and supplemental groove number
presence of mesio-lingual developmental groove
The dental lamina is a horseshoe-shaped band of epithelial tissue that
arises from the and is surrounded by mesenchymal cells.
- basement membrane
- basal lamina
- ectomesenchyme
- oral epithelium
oral epithelium
Enamel matrix is an ectodermal product because ameloblasts are
derived from the inner enamel epithelium of the enamel organ, which
was originally derived from the ectodermal layer of the embryo.
Enamel matrix is first formed in the incisal/occlusal portion of the
future crown near the forming DEJ.
- both statements are true
- both statements are false
- the first statement is true , the second is false
- the first statement is false , the second is true
both statements are true
Mature enamel is by weight:
- 7 4% mineralized or inorganic material, 20% organic material, and 6%
water - 80% mineralized or inorganic material, 18% organic material, and 2%
water - 90% mineralized o r inorganic material, 9% organic material, and 1% water
- 96% mineralized or inorganic material, 1% organic material, and 3% water
96% mineralized or inorganic material, 1% organic material, and 3% water
Which of the following are partially calcified vertical defects in the
enamel resembling cracks or fractures that traverse the entire length
of the crown from the surface to the DEJ.
- enamel tufts
- enamel spindle s
- enamel rods
- enamel lamellae
enamel lamellae
The mesenchymal cells in the dental papilla adjacent to the inner
enamel epithelium differentiate into:
- amelo blasts
- odonto blasts
- cemento blasts
- fibroblasts
odontoblasts
Which structure is the central core and fills the bulk of the enamel organ?
- outer enamel epithelium
- inner enamel epithelium
- stratum intermedium
- stellate reticulum
stellate reticulum
A patient comes into your dental clinic holding a bag of ice to the side
of his face and a sliver of ice tucked between his cheek and teeth. He
says the cold relieves the pain in his tooth. This is almost indicative
of partial necrosis of the structure which innervates the whole tooth.
This structure is a connective tissue that develops from the:
- enamel organ
- dental papilla
- epithelial rests of Malassez
- dental sac
dental papilla
Which of the following statements concerning dentin are true? Select
all that apply.
- it is hard, elastic, 70% inorganic, 2 0% organic, and 10% water
- the main cell type is the odontoblast, which is derived from ectomesenchyme
- the in organic component consists of mainly calcium hydroxyapatite
- it is less mineralized than cementum or bone but more mineralized than
enamel
it is hard, elastic, 70% inorganic, 20%
organic, and 10% water
* the main cell type is the odontoblast, which
is derived from ectomesenchyme
* the inorganic component consists of mainly
calcium hydroxyapatite
A 3-year-old boy is being rushed by his mother to finish up his ice cream. He is unwilling to bite into it because it hurts his teeth. The reason the teeth of children are more sensitive to thermal changes
than those of an adult is that:
- newly erupted teeth have more dentin than older teeth
- newly erupted te eth have larger dental pulps
- newly erupted teeth have more differentiated mesenchyma l cells
- newly erupted teeth have less ground substance
newly erupted teeth have larger dental pulps
Gemination and fusion occur during which stage of tooth development?
- initiation
- bud stage
- cap stage
- bell stage
- appositional stage
- maturation stage
cap stage
A 14-year-old boy comes into the dental office for a prophylaxis. A diet evaluation reveals that he consumes 3-4 cans of soda a day and eats a box of fruit snacks every week. Radiographs show multiple
incipient interproximal carious lesions and one cavitated carious lesion in his premolar. The cavitated lesion in the premolar is beginning to encroach on the pulpal tissue. Reparative dentin is
usually formed in response to injury. The primary function of which tissue is responsible for forming this reparative dentin?
- enamel
- Hertwig ‘s epithelia l root sheath
- dental pulp
- cementum
Dental pulp
The dental tissue which most closely mimics bone is:
- enamel
- dentin
- dental pulp
- cementum
cementum
Which of the following statements concerning cementum are true?
Select all that apply.
- it is formed by cemento blasts from the periodontal ligament
- the organic portion is primarily com posed of collagen and protein
- cellular cementum occurs more frequently on the coronal two -third s of the root
- it is avascular
- it is form ed by cem entobla sts from the periodontal
ligam ent - th e o rg an ic portio n is p rim a r ily com p o s e d of
co llagen and protein - it is av as cula r
The junction between primary and secondary dentin is characterized by a sharp change in the direction of dentinal tubules. Tertiary dentin is the dentin formed in a tooth before the completion
of the apical foramen of the root.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is true, the second is false
Which of the following is formed inside the walls of the dentinal tubules?
- tertiary dentin
- mantle dentin
- peritubular dentin
- inter-tubular dentin
peritubular dentin
After the inner enamel epithelium differentiates into preameloblasts, dentinogenesis is initiated by the odontoblasts. In a cross section, enamel tufts and lamellae are seen as a series of lines extending from the dentinoenamel junction toward the tooth surface, while in a longitudinal section, they appear as concentric rings.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is true, the second is false
The application of excessive heat to a tooth results in pain because:
- excessive stimulation of a heat receptor always results in pain
- heat receptors in the pulp have a low threshold to pain
- all stimuli to the pulp results in a pain sensation
- blood vessels of the pulp expand and cause strangulation of the tissue
all stimuli to the pulp results in a pain sensation
When two teeth in the same arch are in contact, their curvatures adjacent to the contact areas form spillway spaces called embrasures. The design of contact areas, inter-proximal spaces, and embrasures varies with the form and alignment of the various teeth; each section of the two arches shows similarity of form.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
both statements are true
When viewed from the facial, all posterior teeth have proximal contacts in the middle third.
The more posterior teeth (the molars) have contacts higher in the middle third than the premolars.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is true , the second is false
A 16-year-old patient is referred to the orthodontist’s office needing work to fix her malocclusion. Before the patient’s first appointment, the orthodontist reviews the clinical photographs of the patient and notices mamelons. Mamelons are unusual in older patients and would indicate that the patient most likely has which of the following malocclusions?
- posterior crossbite
- posterior open bite
- anterior open bite
- edge-to-edge class III dental occlusion
anterior open bite
Which of the following are true concerning developmental grooves?
Select all that apply.
- they are formed during tooth development
- they usually separate the primary parts of the crown or root
- they are important escape w ays fo r cusps during lateral and protrusive jaw
motions and for food particles during mastication - they are broad, deep, linear de pressions
they are formed during tooth development
* they usually separate the primary parts of the crown or root
* they are important escape ways for cusps during lateral and
protrusive
jaw motions and for food particles during mastication
In many older individuals, gingival recession leads to an unaesthetic problem affectionately known as “black triangle disease.” This is caused by the loss of gingival tissue in the interdental space. The interdental space is the:
- occlusal (incisal) border at which the gingiva meets the tooth
- portion of the gingiva that fills the inter-proximal space
- collar of tissue th at is not attached to the tooth or alveolar bone
- band or zone of gray to light or coral pink keratinized masticatory mucosa that is firmly bound down to the underlying bone
portion of the gingiva that fills the interproximal space
Which of the following types of ridges is unique to permanent maxillary molars?
- a labial ridge
- a marginal ridge
- an oblique ridge
- a transverse ridge
an oblique ridge
Transverse ridges are very common on which of the following
Select all that apply.
- mandibular premolars
- mandibular molars
- maxillary premolars
- maxillary molars
mandibular molars
maxillary premolars
A 7-year-old patient comes into your pediatric practice for a routine prophylaxis. When conducting an intra-oral exam you comment to him that you notice that he has just eaten something sticky like gummy worms or fruit snacks. The chewing surface of posterior teeth, and the likely location of sticky food deposits in this patient, is
referred to as the:
- clinical crown
- incisal edge
- occlusal surface
- an atomic crown
Answer
* occlusal surface
All anterior teeth show traces of:
- one lobe
- two lobes
- three lobes
- four lobes
four lobes
A young patient comes to the clinic complaining that he gets too much food stuck behind his front tooth when he bites. On examination, the dentist notes an anomalous, claw-shaped cusp which projects from the cingulum of tooth #9. This small elevation of enamel found on the crown portion of a tooth would be classified as a:
- tubercle
- mamelon
- ridge
- developmental depression
tubercle
How many line angles are there in an anterior tooth?
- four
- five
- six
- eight
six
Any linear elevation on the surface of a tooth is called:
- an incline
- a prominence
- a ridge
- a tuberosity
a ridge
Which tooth in the mouth has the greatest axial inclination relative to the occlusal plane?
- maxillary canine
- maxillary lateral incisor
- maxillary central incisor
maxillary central incisor
Which teeth have the most variable crown shape of all permanent teeth?
- maxillary lateral incisors
- mandibular lateral incisors
- maxillary third molars
- mandibular second premolars
maxillary third molars
Which of the following statements concerning the mandibular lateral incisor are true?
Select all that apply.
- the mandibular lateral incisor is a little larger in all dimensions than the mandibular central incisor
- the crown of the mandibular lateral incisor is not as bilaterally symmetrical as the mandibular central incisor
- the cingulum is directly in the center of the lingual surface
- the single root is usually straight, slightly longer and wider than that of a mandibular central
the mandibular lateral incisor is a little larger in all dimensions than the
mandibular central incisor
* the crown of the mandibular lateral incisor is not as bilaterally symmetrical
as the mandibular central incisor
* the single root is usually straight, slightly longer and wider than that of a
mandibular central
Which tooth is considered the “cornerstone” of the permanent dentition?
- maxillary canine
- maxillary second molar
- mandibular canine
- mandibular first molar
mandibular first molar
A patient walks into your office holding three crowns in her hand and claims that they fell out during a car accident. You notice that one of the crowns has a mesiolingual developmental groove. This is a dead giveaway that this tooth is a:
- maxillary first premolar
- mandibular first premolar
- maxillary second premolar
- mandibular second premolar
mandibular first premolar
You are sifting through extracted teeth to practice a root canal. Since you will rarely do a third molar root canal in practice, you throw those out right away. What is the most reliable distinguishing feature of the mandibular third molar?
- fused and compressed root system
- short, bulbous outline of the crown
- marginal ridge forming a smooth circle
- marked distal inclination of the root trunk
- great morphologic resemblance to the first molar
marked distal inclination of the root trunk
The most distinguishable difference between the maxillary first and second permanent premolars is:
- the size of the crown
- the number of roots
- the curvature of the facial surface
- the length of the lingual cusp
the number of roots
The maxillary first molar is the largest tooth in the maxillary arch and also has the largest crown in the permanent dentition. All maxillary molars are wider buccolingually than mesiodistally; in
comparison, the mandibular molars are wider mesiodistally.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
both statements are true
The ________ are the only teeth in the permanent dentition with a vertical and centrally placed labial ridge.
- central incisors
- lateral incisors
- canines
- premolars
Canines
When filling a Class II amalgam you are having trouble fitting the matrix band perfectly and keep getting an overhang in the cervical area. What surfaces are you preparing?
- mesio-occlusal of a maxillary first premolar
- disto-occlusa l of a maxillary first premolar
- mesio-occlusal of a maxillary second premolar
- disto-occlusal of a maxillary second prem olar
- mesio-occlusal of a mandibular first premolar
- disto-occlusal of a mandibular first premolar
mesio-occlusal of a maxillary first premolar (the mesial surface has a pronounced mesial concavity that can be hard to adapt to with a matrix band)
A linguogingival groove may be present on the root (and possibly on the crown) of the maxillary lateral incisor. A maxillary lateral incisor has a single conical root that is relatively smooth and straight but may curve slightly to the distal.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
both statements are true
A mandibular canine is wider labioiingually and mesiodistally than a maxillary canine. The crown of the mandibular canine can be as long or even longer than that of a maxillary canine.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is false, the second is true
Which tooth has two forms: the three-cusp type and the two-cusp type?
- maxillary first premolar
- mandibular second molar
- mandibular first premolar
- maxillary second premolar
Answer
* mandibular second premolar
The outline of the crown of a maxillary second molar is narrower mesiodistally than that of a maxillary first molar but is about the same width buccolingually. Two crown outline types are possible on the maxillary second molar when viewed from the occlusal: rhomboidal and heart-shaped.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
Answer
* both statements are true
You buy a batch of pre-fabricated temporary crown restorations for your office for the first time. Your assistant drops the entire box on the ground and they all get mixed up. The hardest tooth to distinguish left from right will be the:
- maxillary second molar
- maxillary first molar
- mandibular first molar
- mandibular second molar
mandibular second molar
The mandibular central incisors are the smallest and simplest teeth of the permanent dentition.
The mandibular central has a simple root, which is very narrow labiolingually and wide mesiodistally.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
the first statement is true, the second is false
A permanent maxillary central incisor usually has how many mamelons and developmental lobes?
- two mamelons and two developmental lobes
- two mamelons and three developmental lobes
- three mamelons and two developmental lobes
- three mamelons and four developmental lobes
three mamelons and four developmental lobes
Which ligaments below are considered to be accessory ligaments of the TMJ? Select all that apply.
- spheno-mandibular ligament
- temporo-mandibular ligament
- stylomandibular ligament
- lateral discal ligament
spheno-mandibular ligament
stylomandibular ligament
A patient comes into your dental office complaining of chewing difficulties. When you ask him to protrude his mandible, the mandible markedly deviates to the right. Which muscle, which inserts fibers into the capsule and articular disc of the TMJ, is most likely damaged?
- right med ial p terygoid m usc le
- left medial pterygoid muscle
- right lateral pterygoid muscle
- left lateral pterygoid muscle
right lateral pterygoid muscle
A patient with constant, unexplained headaches is referred to a TMJ specialist by his physician. In order to check for tenderness, the specialist must palpate the joint. What is the best way to palpate the
posterior aspect of the mandibular condyle?
- intraorally
- externally over the posterior surface of the condyle with the mouth open
- through th e external auditory meatus
- any of the above
externally over the posterior surface of the condyle with the mouth open
A 56-year-old man comes into the ER with his mouth wide open. His wife explains that he can’t close his mouth. The resident on-call quickly diagnoses this as a bilateral dislocation of the TMJ and treats it promptly with reduction. Dislocation of the TMJ is almost always:
- posteriorly and occurs while sleeping
- anteriorly and occurs while laughing or yawning
- anteriorly and occurs while chewing food
- posteriorly and occurs while laughing or yawning
anteriorly and occurs while laughing or yawning
Which component of the TMJ has the most vasculature and innervation?
- articular fossa
- anterior band of the articular disc
- posterior band of th e articular disc
- articula reminence
- retrodiscal tissue
retro-discal tissue
A relatively unsuccessful treatment option for individuals suffering from osteoarthritis is to inject or implant hyaline cartilage into areas of articular cartilage degeneration. If osteoarthritis were to involve the TMJ, this treatment modality would definitely be unsuccessful because the articular surfaces of the TMJ are covered with:
- dense fibrous connective tissue
- periosteum
- elastic cartilage
- periosteum and elastic cartilage
dense fibrous connective tissue
A patient with chronic TMJ inflammation is being treated by a dental TMJ expert. To supplement his examination, the dentist wants to image the soft tissues of this patient’s TMJ. Which of the following is
the best imaging modality for identifying the position of the articular disc in the
temporo-mandibular joint?
- panoramic radiograph
- magnetic resonance imaging (MRI)
- computerized axial tomography (CAT Scan)
- lateral transcranial radiograph
magnetic resonance imaging (MRI)
Reciprocal clicking is always a sign of damage to the ligaments that fasten the disc in place.
A disc cannot click if the posterior and collateral ligaments are intact.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
both statements are true
A patient with temporo-mandibular disorder comes to the dental office for treatment. He has bilateral “clicking” of the condyles upon opening and tenderness on palpation of the joint. An MRI shows damaged collateral ligaments. The most common direction in which the articular disc in the TMJ will be displaced in this patient is:
- laterally
- medially
- posteriorly
- anteromedially
anteromedially
The TMJ is a(n):
- arthrodial joint
- ginglymus joint
- ginglymoarthrodial joint
ginglymoarthrodial joint
All of the following structures make up the articulating parts of each temporo-mandibular joint EXCEPT one. Which one is the EXCEPTION?
- mandibular condyle
- articular fossa and articular eminence
- retrodiscal tissue
- articular disc (meniscus)
retrodiscal tissue
Which of the following structures secretes the fluid which lubricates the TMJ?
- retrodiscal tissue
- internal synovial layer of the fibrous capsule
- outer fibrous layer of the fibrous capsule
- articular disc
internal synovial layer of the fibrous capsule
All of the following statements are true EXCEPT one. Which one is the EXCEPTION?
- the crowns of the primary anterior teeth are wide r mesio-distally and shorter inciso-cervically than their permanent counterparts
- the crowns of the primary molars are shorter and more narrow mesio-distally at the cervical third as compared to the permanent molars
- the pulpal horns are lower in primary molars , especially the distal horns, and the pulp chambers are proportionately smaller
- the roots of the primary anterior teeth taper more rapidly than do those of the permanent anteriors
- the roots of the primary molars are longer and more slender than those of the permanent molars
- the enamel ends abruptly at the cervical line on primary teeth , rather than becoming thinner, which occurs on permanent teeth
the pulpal horns are lower in primary molars , especially the distal horns, and the pulp chambers are proportionately smaller
Stainless steel crowns are often used in pediatric dentistry. Also common in pediatric dentistry are kids throwing temper tantrums. One day a 4-year-old patient throws a tantrum and knocks over your
case of stainless steel crowns. When picking out the primary mandibular first molars you remember which of the following statements?
- they resemble the permanent mandibular first premolar
- they resemble the permanent mandibular first molar
- they resemble the permanent maxillary second molar
- they resemble the primary mandibular second molar
- none of the above; their anatomy is unlike any other tooth in the mouth (primary or permanent)
- none of the above; their anatomy is unlike any other tooth in the mouth (primary or permanent)
A frantic mother calls you on the phone asking what to do about her child’s first tooth. You want to impress her. Before she can say it, you tell her what tooth it is. It is a:
- primary mandibular central incisor
- primary mandibular first molar
- primary maxillary central incisor
- primary maxillary first molar
You got that right, and now you really impress her and tell her how old her child is. She is about:
- 4-1/2 months old
- 6-1/2 months old
- 10 -1/2 months old
- 1 year old
- primary mandibular central incisor
- 6-1/2 months old
A 10-1/2-year-oid patient comes into your office. You are not sure whether his maxillary canines are permanent or primary. Which of the following statements will help you determine which they are?
- the cusp on the primary maxillary canine is much shorter than the cusp on the permanent maxillary canine
- the mesial cusp ridge on the primary maxillary canine is shorter than the distal cusp ridge; this is the opposite of all other canines
- the cusp on the primary maxillary canine is much longer and sharper than the cusp on the permanent maxillary canine
- the primary maxillary canine is much narrower and longer than the permanent maxillary canine
- the cusp on the primary maxillary canine is much shorter than the cusp on the permanent maxillary canine
When attempting a MO Class II amalgam preparation and filling on a primary tooth, you encounter a very large mesial marginal ridge that resembles a cusp. You also notice a transverse ridge that runs from the mesio-lingual cusp to the mesio-buccal cusp that is rather large. This tooth often proves difficult to restore, which tooth is it?
- mandibular first molar
- maxillary first molar
- mandibular second molar
- maxillary second molar
mandibular first molar
How many lobes develop to form a primary canine tooth?
- 2
- 3
- 4
- 5
4
A 10-year-old patient comes into your office with his mother. They are concerned about affording orthodontic treatment for his slightly crowded anterior teeth. He has not lost his primary molars yet. From this information alone, you tell his mother…
- don’t worry, the premolar teeth that replace the se primary molars take up less space in the arch, so we can expect to see more room in a few years
- get a second job, the premolar teeth that replace these primary molars take up more space in the arch so we can expect to see even less room
than there is now - the premolar teeth that replace these primary molars take up the same amount of space in the arch. Based on this we cannot tell at this point
whether your son will need orthodontic treatment
don’t worry, the premolar teeth that replace the se primary molars take up less space in the arch, so we can expect to see more room in a few years
Although it usually isn’t much of a problem, which of the following criteria would NOT be used to distinguish primary maxillary central
incisors from their permanent counterparts?
- they are shorter incisocervically
- they are wider mesiodistally than incisocervically
- there are no mamelons present
- the incisal edge is straighter
- the distal flare of the root is greater
the distal flare of the root is greater
The crowns of all 20 primary teeth begin to calcify between:
- 1 to 2 months in utero
- 2 to 3 months in utero
- 4 to 6 months in utero
- 8 to 9 months in utero
4 to 6 months in utero
Sally and Annie, ages six and eight respectively, come into your office and get their picture put up on the “Cavity-Free Board.” On the back of each picture, your assistant writes how many baby teeth they
have lost and how many adult teeth they have. Which numbers are correct?
- Sally (0, 4); Annie (2, 6)
- Sally (2, 6); Annie (4, 10)
- Sally (2, 6); Annie (2, 6)
- Sally (0, 4); Annie (8, 12)
Sally (0, 4); Annie (8, 12)
The mesio-lingual cusp is the most prominent cusp on the primary maxillary first molar.
The mesio-lingual cusp is the longest and sharpest cusp on the primary maxillary first molar.
- both statements are true
- both statements are false
- the first statement is true, the second is false
- the first statement is false, the second is true
both statements are true
A preschool child is shown below with a normal dentition. Note the spaces between the maxillary lateral incisor and canine and the mandibular canine and first primary molar. These spaces are termed
_______ spaces, and their presence allows for the space to be filled by permanent teeth as they erupt.
- primitive
- private
- primate
- hawley
primate
A neophyte dental student, only about two weeks into the program, gets scared when her 10-year-old cousin gets hit in the face and loses a tooth. She calls you up and says that her cousin lost his permanent mandibular first molar. Once she tells you more about the root morphology of the tooth, you realize it is primary and the child simply
lost his…
- primary mandibular first molar
- primary mandibular second molar
- primary maxillary first molar
- primary maxillary second molar
primary mandibular second molar
Morphologically, the primary maxillary second molar strikingly resembles the:
- permanent maxillary third molar
- permanent maxilla ry second m olar
- permanent maxillary first molar
- permanent mandibular second molar
permanent maxillary first molar
Primary molar relationships are known as:
- class relationships
- step relationships
- primitive relationships
- occlusion relationships
step relationships
Both the mesial-step and flush-terminal-plane relationships usually result in the development of a:
- class I permanent molar occlusion
- class II permanent molar occlusion
- class III permanent molar occlusion
class I permanent molar occlusion
