Nomenclature Flashcards
What is the term to describe the natural teeth that are located in the maxillary or mandibular aches?
dentition
Teeth that are shed or exfoliated have what type of dentition?
primary or deciduous (20 testh)
What type of dentition do the 32 adult teeth have?
permanent dentition
What is the name of the permanent teeth that replace the primary teeth?
succedaneous teeth
What type of dentition is present during the transition period between primary and permanent dentition?
mixed dentition
What teeth are located in each quadrant of the mouth that contains primary dentition?
central incisor lateral incisor canine first molar second molar
How many primary teeth are there?
20
How are primary teeth names?
Lettered A to T beginning w/ primary maxillary R 2nd molar
What teeth are located in each quadrant of the mouth that contains permanent dentition?
central incisor lateral incisor canine first premolar/bicuspid second premolar/bicuspid first, second, third molar
How are teeth with permanent dentition numbered?
#1 maxillary R 3rd molar #6 maxillary L 3rd molar #17 mandibular L 3rd molar #32 mandibular R 3rd molar
What is the anatomical crown?
portion of the tooth covered by enamel, fixed size
What is the portion of the tooth that is clinically visible?
Clinical crown
How does the clinical crown change with age?
As the patient gets older the clinical crown gets larger as part of the root is exposed
What is the surface of the tooth that is closest to the midline?
mesial
Where is the distal surface of the tooth located?
farthest from the midline
What are the 2 types of facial tooth surfaces and where do reside?
labial: anterior teeth
buccal: posterior teeth
Where is the lingual surface of the tooth?
portion of the tooth closest to the tounge
Palatal surfaces are used to describe what types of surfaces?
maxillary lingual surfaces of posterior teeth
What is the name of the biting chewing surfaces? What teeth have this surface?
Occlusal - only on posterior teeth
What is the name of the biting surface of the anterior teeth?
Incisal
Labial/Facial surfaces are only on what type of teeth?
Canine or incisors
What type of teeth have an incisal ridge?
anterior teeth
What is the term to describe the sides of the teeth? What surfaces does it compose?
Axial surfaces - mesial, distal, facial, lingual
What is the proximal surface of a tooth?
the touching of mesial/distal surfaces adjacent teeth
What is the proximal surface of the central incisors?
2 mesial surfaces contact each other at the midline
T/F the distal surfaces of the 3rd molars are not proximal surfaces
True (b/c we don’t have a 4th molar touching the 3rd molar)
What is a ridge?
elevation of tooth structure (positive anatomy)
What type of teeth have triangular ridges? Where are they located? Where do they extend?
posterior teeth, on the occlusal surfaces
Descend from tips of cusps toward central part of occlusal surface
What types of ridges go onto the facial or lingual surfaces of teeth?
facial/lingual ridges, NOT triangular ridges
Where do the Lingual Heights of Contour occur?
lingual surfaces of posterior teeth, biggest bulge on the tooth
What make up the positive anatomy of teeth?
cusps
ridges (incisal, marginal, triangular, cuspal, facial, lingula, cervical, transverse, oblique)
Cingulum (anterior teeth)
lingual heights of contour (posterior)
What make up the negative anatomy of the teeth?
Fossa Grooves: developmental, supplemental Sulcus Developmental depression Pits
What comes first, positive or negative tooth anatomy?
Positive tooth anatomy gives rise to negative tooth anatomy
What is sulcus?
A space/depression between tooth areas - cannot touch a sulcus!
What lies at the bottom of a sulcus?
Groove
What is the anterior teeth division of thirds?
incisal, middle, cervical
When two surfaces meet what does it create?
line angle
Proximal Surfaces are the surfaces of teeth facing toward the adjoining or adjacent teeth in the same arch. Axial Surfaces are the surfaces of teeth that are parallel to the long axis of the tooth (Mesial, Distal, Facial, Lingual).
A. Both statements are false
B. The first statement is true; the second statement is false
C. Both statements are true
D. The first statement is false; the second statement is true
C. Both statements are true
All teeth have combinations of raised or convex areas (positive anatomy) and depressed or concave areas (negative anatomy). The positive anatomy is formed or constructed first, which then properly displays the negative anatomy.
A. Both statements are false
B. The first statement is true; the second statement is false
C. Both statements are true
D. The first statement is false; the second statement is true
C. Both Statements are true
The mesial surface of one tooth will contact the distal surface of the adjacent tooth except at the ______________________ and on the distal surface of the ____________.
Midline; third molars
The junction or separation between the crown and the root is called the:
Cementoenamel junction
The construct of the permanent anterior teeth include all of the following EXCEPT:
A. They are important in phonetics…“F” & “V”, “T”, “D” & “S” sounds
B. All are typically multi rooted teeth
C. They are used to “incise” or tear or shred food, not to chew (masticate)
D. There are six teeth in the maxillary arch and six teeth in the mandibular arch
B. They are typically multi rooted teeth
The triangular ridges on the facial cusps are called lingual ridges. Additionally, the triangular ridges of the lingual cusps are called facial ridges.
A. Both statements are false
B. The first statement is true; the second statement is false
C. Both statements are true
D. The first statement is false; the second statement is true
A. Both statements are false
Posterior teeth have ____ facial cervical ridges and they have ____ lingual cervical ridges
1 facial cervical ridges
0 lingual cervical ridges
A transverse ridge is the union (or connection) of two triangular ridges crossing in a transverse direction on the surface of all teeth. Many posterior teeth have one transverse ridge, some have no transverse ridges.
A. Both statements are false
B. The first statement is true; the second statement is false
C. Both statements are true
D. The first statement is false; the second statement is true
D. The first statement is false; the second statement is true
______ is the actual sharp line that delineates the facial from lingual surfaces on incisors
incisal edge
The rounded borders of the enamel that form the mesial and distal margins or borders of the lingual surface of anterior teeth (incisors & canines) are called?
marginal ridges
How many triangular ridges does each posterior tooth cusp have?
1
Are triangular ridges wider or narrower at the base than at the cusp tip?
wider
Where do cusps/cuspal ridges travel?
descend from tips of cusps in lateral directions either towards or away from midline of the arch
How many ridges does each posterior tooth cusp have? How many ridges are a triangular ridge
4 ridges that emanate from the tip
1 is a triangular ridge
How are cuspal ridges named?
according to their location
What teeth have oblique ridges?
maxillary molars (primary and permanent)
Where does the oblique ridge travel?
obliquely crosses the occlusal surface and is formed by the union of the triangular ridge of the distofacial cusp and the distal cusp ridge of the mesiolingual cusp
What is the union of two triangular ridges that transverse on the surface of only posterior teeth called?
transverse ridge
How many transverse ridges to posterior teeth have?
1 to 0
