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Tooth Morphology
Set for TM Biweekly 1
57
Other
Professional
08/09/2011

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Term
Diphyodont
Definition
Mammals that have two sets of teeth during a lifetime
Term
Formation of primary dentition
Definition
Occurs around 14 weeks in utero
Term
Number of primary teeth (aka deciduous/baby teeth)
Definition
20 (10 maxilla, 10 mandibular)
Term
Types/Number of primary teeth
Definition
5/quadrant (2 incisors, 1 canine, and 2 molars)
Term
Mandibular Central Incisors
Definition
First primary teeth that emerge in the oral cavity at the mean age of 8 mos.
Term
Maxillary Second Molars
Definition
Last primary teeth that emerge in the oral cavity at the mean age of 28 mos.
Term
Mixed Dentition Period
Definition
AKA Transition period, between the ages of 6-12 years old (primary and permanent dentition mix). Begin: When permanent second molars erupt and primary molars are replaced by permanent premolars. Ends: Most permanent dentition has erupted (Except for 3rd molars @ 18-25yo) around 14-15 years old.
Term
Mandibular First Molars
Definition
First permanent teeth that emerge in the oral cavity at the mean age of 6 years (but good to note that the permanent mandibular incisors sometimes emerge first).
Term
Number of permanent teeth (aka secondary/succedaneous teeth)
Definition
32 (16 max., 16 mand.)
Term
Types/Number of secondary teeth
Definition
8/quadrant (2 incisors, 1 canine, 2 premolars, 3 molars)
Term
Zsigmondy/Palmer Numbering System
A. Permanent Dentition (#'s)
B. Primary Dentition (Letters)
Definition
A. Midline of the mouth is 1 then out to 8 going laterally in the quadrant.
B. Midline of the mouth is A then out to E going laterally in the quadrant.
Term
Two-Digit System (FDI, WHO, and IADR)
A. Permanent Dentition
B. Primary Dentition
Definition
A. First number? Quadrant you are in (1-4, 1. UR 2. UL 3. LL 4. LR. Second number? Count back laterally 1-8.
B. Primary is the same, but quadrants are just continuing (5-8).
Term
Universal System (What we use)
A. Primary Dentition (Letters)
B. Permanent Dentition (#'s)
Definition
A. Quadrants but start laterally and work in 1. A-E (UR) 2. F-J (UL), etc.
B. Quadrants, but with numbers
Term
Descriptive terms
Definition
Maxillary or mandibular, right or left, and what type of tooth it is.
Term
Clinical Crown
Definition
The part of the tooth that can be seen in the oral cavity.
Term
Clinical Root
Definition
The part of the tooth that is covered by the gingiva (gum).
Term
Anatomical Crown
Definition
Part of the crown that is covered with enamel.
Term
Anatomical Root
Definition
Part of the root that is covered with cementum (gives it the yellow appearance).
Term
Cervical line or Cementoenamel Junction (CEJ)
Definition
Division of the anatomical root and crown
Term
Apex
Definition
Tip of the root (or apices of the roots in molars)
Term
Apical Foramen
Definition
Opening at the root apex
Term
Tooth tissues - enamel
Definition
Outer layer (hard tissue)
Term
Tooth tissue - Dentin
Definition
Inner layer in the crown (hard tissue)
Term
Tooth tissue - Cementum
Definition
Inner (hard tissue) in the root (gives the yellow appearance)
Term
Tooth Tissue - Pulp
Definition
Inner (soft tissue) that holds lymphatics, a nerve supply, arteries, veins, and forms DENTIN!)
Term
Periodontal ligament
Definition
Outside of the tooth between the root/bone, connective, anchors tooth to the bone.
Term
Pulp Horn
Definition
Projections in the root of the pulp chamber corresponding to the major cusps or lobes
Term
Pulp chamber
Definition
The crown portion of the tooth that contains the pulp tissues.
Term
Root Canal
Definition
Root portion of the tooth that contains the pulp tissue
Term
Supplemental canal
Definition
At the root apex, end of the root canal
Term
Apical foramen
Definition
An opening at the root apex - to periapical tissues.
Term
Furcation of the Root
Definition
An area of a mult-rooted tooth in which a root branches off (bifurcation - 2, trifurcation - 3)
Term
Root Trunk
Definition
Area of the root between the CEJ (root/crown junction) and the furcation of the root.
Term
Vestibule
Definition
Area between the cheek/gingiva (where food can get stuck)
Term
Labial Frenum
Definition
Attachment between upper lip/upper front teeth (or lower)
Term
Retromolar Pad
Definition
Cushioned mass of tissue on the alveolar process of the mandible.
Term
Alveolar process (bone of the tooth socket = alveolus)
Definition
Portion of the jaw serving as support for the tooth
Term
Radicular
Definition
Of, relating to, or occurring at the root of the tooth
Term
Incisal
Definition
The cutting surface
Term
Lobe
Definition
One of the primary section of formation in the development of the crown
Term
These are representative of lobes
Definition
Cusps, cingulum (a shelf at the margin of a tooth), and mamelons.
Term
Tubercle
Definition
An elevation on the crown produced by extra enamel formed. Term used with deviations from the typical.
Term
Line angles - Anterior Teeth (6)
Definition
The junction of two surfaces.
1. Labioincisal
2. Linguoincisal
3. Mesiolingual
4. Distolingual
5. Mesiolabial
6. Distolabial
Term
Line Angles - Posterior Teeth (8)
Definition
1. Mesio-occlusal
2. Linguo-occlusal
3. Mesiolingual
4. Distolingual
5.Mesiobuccal
6. Distobuccal
7.Bucco-occlusal
8.Disto-occlusal
Term
Point Angles
A. Ant (incisal)
B. Post (occlusal)
Definition
The junction of 3 surfaces.
A. Mesiolabioincisal
B. Distolabioincisal
C. Mesiolinguoincisal
D. Distolinguoincisal

E. Mesiolinguo-occlusal
F. Distolinguo-occlusal
G. Mesiobucco-occlusal
H. Distobucco-occlusal
Term
Embrasures
Definition
"Empty," triangular-shaped spillways found between the two adjacent teeth, surrounding the proximal contact (to prevent food from being lodged into there) except for cerv/ging (ex. facial towards cheek, lingual triangle space behind teeth, occlusal/incisal). The cervical/gingival embrasure contains part of the gingiva that is called the Interdental Papulla (IDP)
Term
Yellow Flame
Definition
Not enough air coming through (TOO BIG)
Term
Which waxing instruments should NOT be heated?
Definition
#3 and #4 (carvers with shapes to maintain)
Term
PKT #1, #2
Definition
Good for applying bulk wax (#2 is smaller, better for smoothing with the smallest tip, small increments of wax).
Term
DPT #6
Definition
Varnishes the waxing (can lightly heat)
Term
PKT #3
Definition
Cone-shaped, works to carve occlusal grooves, shape area between marginal ridges.
Term
PKT #4 or 1/2 Hollenback
Definition
Don't order #4, use 1/2 for carving
Term
PKT #5
Definition
Has concave surface, good for shaping marginal/occlusal ridges
Term
DPT #6
Definition
Pretty dull, works for crown margination
Term
Dr. Peter K Thomas
Definition
Designed the set of 5 waxing instruments
Term
Boley Gauge
Definition
Device used for measuring tooth dimensions (first 0.01 on the outside counts as the "0" position)
Term
Height of Contour
Definition
Most prominent part of the tooth
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