Exam #1 Flashcards
________ periodontal fibers are known to resist forceful impaction of a tooth into the alveolus, consistent with many types of trauma
Oblique
With respect to the primary tooth crowns:
The enamel is relatively _____ & has consistent depth. The dental thickness is ________. The pulp horns are ______ & the pulp chambers are ________ large. Pulp horns protrude higher underneath crown heights because their dentin thickness is ________.
thin
limited
high
proportionally
minimal
With respect to the facial view of the primary mandibular first molar:
- The cervical ridge is quite _______ in the mesial half and fades _____ onto the distofacial cervical third.
- The mesial root is much ______ and more ______ than the distal root.
- convex; out
- longer; straight
Why do the pulp horns of primary teeth protrude heigher than in permanent?
Dentin thickness is minimal which allows for larger and taller pulp chambers/horns
What is the function of the transseptal periodontal fibers?
Help maintain contiguous proximal contact
With respect to the occlusal view of the primary mandibular second molar:
- The tooth possesses a ______ and ______ central developmental groove.
- There is a distinct _______ marginal ridge groove.
- The distal marginal ridge has a _____ instead of a groove that splits it into two segments.
- long; winding
- mesial
- “notch”
Lingual embrasures on the maxillary first molar are ________ than their respective facial embrasures.
smaller; this is because the crown tapers to the facial
A condition of having more than the usual number of teeth in the primary dentition is termed?
Primary hyperdontia (supernumerary primary teeth)
What is the function of oblique periodontal fibers?
Resist forceful impaction of tooth ito alveolus which is consistents with trauma.
With respect to the incisal view of the primary lateral incisors:
The incisal ridge is curved toward the _______ surface.
facial
“V” shaped spaces that are created when two teeth in the same arch exhibit proximal contact are called ________.
Embrasures
________ periodontal fibers help to maintain contiguous proximal contact
Transseptal
With respect to the occlusal view of a primary mandibular second molar:
Do the triangular ridges located on each cusp meet to form transverse ridges?
No. There are significant triangular ridges but none meet to form transverse ridges.
Compare & Contrast primary vs permanent crowns:
- Crown color
- Enamel thickness
- Dentin thickness
- Pulp chamber size (proportionally)
- Pulp horn height
- Position of enamel rods in cervical third
- Primary teeth have whiter crowns (permanent= yellower)
- Primary teeth have thinner enamel
- Primary teeth have thnner dentin
- Primary teeth have proportionally larger pulp chambers
- Primary teeth have taller pulp horns
- Primary teeth enamel rods positioned occlusally, while permanent teeth’s are positioned apically.
In an ideal embrasure construct, every contact area produces _____ embrasures that are continuous and _______ with each other.
Four; contiguous
With respect to the lingual view of the primary maxillary first molar:
- The mesiolingual cusp is more prominant on the _______ surface than the distolingual cusp.
- The distolingual cusp, if visible, is ______.
- Lingual
- Small
Is hyperdontia seen in permanent dentition?
You know it, brah
With respect to the Height of Contour on the Mandibular Arch:
- All facial surfaces: ____ mm located in the _______ third.
- Anterior lingual surface: _____ mm located in the _____ third.
- First Premolar lingual surface: _____ mm located in ______ third.
- Second Premolar lingual surface: ____ mm located in _______ third.
- Molar lingual surface: _____ mm located in _____ third.
- 0.5; cervical
- 0.5; cervical
- 0.5; middle
- 0.75; middle
- 1.0; middle
True or false:
Can an embrasure exist with a diastema?
True. It is not necessary for the adjoining teeth to physically touch.
You know Michael Strahan be lovin him some embrasures in the diastema.
With respect to the occlusal view of the primary mandibular second molar:
- Mesiofacial & distofacial developmental grooves separate the _____ cusps.
- Major fossae include the ______, ______ triangular and ______ triangular fossa.
- 3
- lingual
The most common location in the mandible for a permanent supernumerary tooth to exist is the mandibular ______ _______.
second premolar
With respect to the facial view of the primary mandibular first molar:
- The mesiofacial cusp is ______ and ______ than the distofacial cusp.
- There is a short or indistinct facial developmental groove that looks more like a ________.
- The cervical line significantly points or dips _______ onto the mesial root surface on the mesial half of the tooth.
- larger; taller
- depression
- apically
Supernumerary permanent teeth are commonly seen with all of the following EXCEPT:
A. Maxillary Central Incisors
B. Maxillary Lateral Incisors
C. Mandibular Premolars
D. Mandibular First Molars
E. Mandibular Third Molars
D. Mandibular first molars.
The surfaces of teeth facing toward the adjoining or adjacent teeth in the same arch are ______.
The surfaces of teeth that are parallel to the long axis of the tooth (mesial, distal, facial, lingual) are ______.
proximal surfaces
axial surfaces
The oblique ridge is a “special kind” of transverse ridge made of a union of the triangular ridge of the _________ cusp & the distal cusp ridge of the _________ cusp.
distofacial
mesiofacial
The union of the triangular ridge of the distofacial cusp & the distal cusp ridge of the mesiolingual cusp is known as:
oblique ridge
A depression or valley or space on the surface of the tooth betwen two ridges or cusps is called _______.
sulcus
A sulcus is a ________ or space. It is NOT a groove. At the bottom of a sulcus is a ______.
depression
groove
The first evidence of calcification in primary teeth is seen in:
maxillary and mandibular central incisors at 14 weeks
The last primary tooth to begin calcification is:
maxillary second molar at 19 weeks
The first primary teeth to exfoliate are:
maxillary & mandibular central incisors at 6.5 years
The last primary tooth to exfoliate is:
maxillary second molar at 11 years
The first permanent tooth to erupt is:
maxillary and mandibular first molar at 6 years
The first permanent roots to completely form are:
maxillary first molar, mandibular central incisors and mandibular first molar at 9 years.
The tuberculum intermidium is an __________ of either the distal cusp ridge of the mesiolingual cusp or the mesial cusp ridge of the distolingual cusp.
overdevelopment
An overdevelopment of either the distal cusp ridge of the mesiolingual cusp or the mesial cusp ridge of the distolingual cusp.
Tuberculum intermedium
With respect to the plane of occlusion:
- The ideal plane is not _____.
- A flat plane allows for too many _______ on most posterior teeth on both sides of the mouth.
- flat
- contacts
With respect to the plane of occlusion:
- The proper plane of occlusion will permit simultaneous _______ contacts.
- A ________ plane permits maximum use of tooth contacts during function.
- The teeth are _________ positioned in the arches at varied and coordinated _________ of inclination.
- functional
- curved
- strategically; degrees
Proximal contact areas of mandibular teeth:
Midline
Distal of Central
Mesial of Lateral
Distal of Lateral
Mesial of Canine
Distal of Canine
5 I’s and and M (first 5 incisal third & last is middle third)
*Note none of the are in the junction or or cervical third*
Are any of the proximal contact areas of mandibular anterior teeth in a junction or the cervical third?
El negatív
___ arises through the union of two normally separated tooth germs and depending upon the stage of development of the teeth, it may be either complete or incomplete. It can also be the union of a normal tooth bud to a ___ tooth germ.
Tooth Fusion
supernumerary
In fused teeth are the pulp chambers fused?
Fusion is commonly seen with the ___ and ___.
Maxillary second and third molars
Why is the permanent maxillary central incisor easily extractable? (2 reasons)
The root is cone-shaped witha relatively blunt apex.
There is no evidence of root survace development depressions.
For the permanent maxillary lateral incisor, the crown length is ____ than the maxillary central incisor.
The crown width is ___ than the maxillary central incisor.
Its root apex typically has a ___ curvature associated with it.
1.0 - 1.5 mm shorter, 2.0 mm less
distal
For the permanent maxillary lateral incisal ridge and root apex ____ (will/will not) be in line with each other. The incisal ridge is centered ____ over the crown and main body of the root.
will not
faciolingually
For the permanent mandibular central incisors the incisal edge will be ___ to the faciolingual long axis bisector. The enamel on the facial surface will extend ___ about __ mm more than it does on the lingual.
lingual
apically, 0.5
For the permanent mandibular lateral incisors the incisal edge is straight but may appear slanted toward the ___. the mesial incisal line angle is sharp but the distal incisal line angle is usually a little more ___. Due to the curvature in the crown outline, the crown is not ___. The crest of the gingival curvature of the cervical line will be slightly ___ to the mesiodistal long axis bisector.
distal
rounded
symmetrical
distal
The incsical ridge of the permanent mandibular lateral incisors is located slightly toward the ___ surface when compared to the faciolingual long axis bisector that travels throught he root apex.
lingual
The permanent maxillary canine cusp tip is either ___ or slightly ___ to the vertical center of the tooth.
in line or slightly mesial (never distal)
Are the following statements true regarding the permanent maxillary canine?
The cusp tip is aligned with the root tip and the height of curvature of the cervical line.
There is a pronounced convexity which is cervical to the distal contact area.
First is true, second is false.
There is never a convexity but there is a concavity.
Permanent Mandibular Canine:
Cusp tip is ___ to the faciolingual bisector.
There is a significant ___ curvature of the cervical line.
The____ is not pronounced.
A root surface developmental depression is ___ which increases the possibility of ____.
lingual
incisal
cingulum
pronounced and deep; two roots
The permanent maxillary first premolar lingual cusp tip is less pointed and about ___ than the facial cusp. The lingual cusp tip is slightly ___ to the mesiodistal long axis bisector. The mesial and distal outlines of the of the lingual cusp will both be slightly ___. Which surface(s) of the crown are visible?
1.0 mm shorter
mesial
convex
both mexial and distal surfaces of the crown are visible.
For the permanent maxillary first premolar the crest of this mesial marginal ridge is almost ___ to the faciolingual long axis bisector. It is divided into a facial and a lingual segment by the ____.
perpindicular, mesial marginal developmental groove
For the permanent maxillary first premolar the crest of the lingual segment lingually is distinctly ___ to the mesiodistal bisector of the crown. The facial cusp tip is ___ to the mesiodistal bisector and ___ the distance from the facial outline to the faciolingual bisector of the crown.
mesial
distal, 1/3 (not 1/2)
Which tooth is described from a lingual perspective? The tip of the lingual cusp is in line with the tip of the facial cusp and nearly equal in height and a little more rounded than the facial cusp. The cuspal ridges of the lingual cusp will not be as high occlusally as those of the facial cusp and will present the same angle of slant from the tip of the cusp.
Permanent Maxillary Second Premolar
Why is the permanent maxillary second premolar described as having a relatively short central groove and relatively wide marginal ridges?
It has mesial and distal triangular fossae that are irregularly shaped.
They are nearer the center of the tooth when compared to the triangular fossae on the maxillary first premolar.
With respect to occlusal view of the permanent mandibular second premolar:
- There are ________ angle connections that are evident between the cuspal ridges and the adjacent marginal ridges.
- The three-cusp variety does not have a _________ ridge.
- The central groove has a mesial and distal component and is _________ positioned.
- On the three-cusp variety, the outline of the developmental grooves is a ______ shaped pattern.
- right
- transverse
- lingually
- Y
With respect to the lingual view of the permanent mandibular second premolar:
- The three-cusp variety has 2 _______ cusps with a _________ groove on both cusps.
- The lingual groove is _________ positioned.
- The mesiolingual cusp tip is approximately ______ mm shorter than the facial cusp tip.
- The distolingual cusp tip is about ______ mm shorter than the facial cusp tip.
- lingual; lingual
- distally
- 1.5
- 2.0
With respect to the occlusal view of the permanent mandibular first premolar:
- The mesial triangular fossa has a mesial groove at the bottom of it that is _________ in shape & is continuous with the ____________ groove.
- At the bottom of the distal triangular fossa is a ________ shaped distal groove.
- The central groove is located on the lingual side of the tooth & will bend or be oriented to the __________ surface.
- linear; mesiolingual
- comma
- lingual
With respect to the mesial view of the permanent mandibular first premolar:
- A very ________ and somewhat ____________-positioned lingual cusp triangular ridge is seen.
- The _________ groove is positioned on the lingual portion of the crown.
- There is a ______ degree angle to the crest of the mesial marginal ridge.
- A distinct mesiolingual groove is present that is located at the mesiolingual line angle, but is NOT continuous with the mesiolingual coronal _____________.
- short; horizontally
- central
- 45
- depression
With respect to the lingual view of the permanent mandibular first premolar:
- The lingual cusp has consistent ___________ qualities to the anatomy.
- The lingual cusp tip is approximately _______ the height of the facial cusp tip.
- A __________ & ___________ lingual cusp tip is evident.
- cingulum
- two-thirds
- pointed; centered
