The Basics (Lecture #1) Flashcards
(29 cards)
Primary Dentition
Baby Teeth! Form 16 Weeks in Utero Usually complete at 3 A一>J Maxillary K一>T Mandibular *no premolars (but first and second molar are succeeded by permanent premolars)
Mixed Dentition
Both primary and permanent teeth are in the mouth
Lasts 6 years (6-12)
Succedaneous Teeth
AKA permanent teeth!
Not all permanent teeth are succedaneous (replace exfoliated primary teeth) NO MOLARS are Succedaneous
Dental Formula for Permanent Dentition
I2/2 C 1/1 P 2/2 M 3/3= 16 multiply by 2 = 32
Palmer Numbering System
Quadrants: Midline and Maxillary from Mandibular
Starting at Midline #1一>8
Draw the half box __l and the #
FDI Numbering System
Quadrants at midline and maxillary fro mandibular
Upper Right: All start with 1 then number 1一>8 central incisor to molar (#3 = #16)
Upper Left: All start with 2 then number 1一>8
Lower Left: All start with 3 then number 1一>8
Lower Right: All start with 4 then number 1一>8
Tissues of the Tooth
- Enamel - hard tissue
- Dentin - hard tissue
- Cementum - hard tissue
- Pulp - soft tissue
Cingulum
A Lingual lobe of an anterior tooth
Triangular Cusps
Ridge of tips to the central part of occlusal surfaces
Transverse Ridge
When a B and L triangular ridge join
Tubercle
Small elevation on some portion of the crown (deviation from the typical form)
Triangular Fossa
found on premolars and molars surfaces medial and distal
Developmental Groove
shallow groove/line between the primary parts of the crown OR root
Supplemental Groove
less distinct than developmental.
Shallow linear depression on the surface of a tooth DOES NOT mark junction of primary parts.
Pits
small pinpoint depressions located at the junction of developmental grooves or at the terminals of grooves
Lobes
one of the primary sections of function in the development of the crown. Cusps and mamelons are representative of lobes
Alveolar Process
roots are held in the jaw in this hole
Alveolus
is the bone of the socket where teeth are held
Line angles
Junction of 2 surfaces
ANTERIOR TEETH: 6 line angles
POSTERIOR TEETH: 8 line angles
Point Angles
formed but he junction of 3 surfaces
Anterior AND Posterior have 4
Maxillary Central Incisor
- Widest of ANTERIOR teeth
- Facial surface is less sticky outty than the maxillary lateral or canine
- Rectangular/Squared appearance
- MesioIncisal angle is sharp, distal edge is round
- Only anterior tooth that is wider mesiodistally than faciolingually
- Contact: Mesial is the incisal 1/3
Distal junction of incisal 1/3 and middle 1/3 - Bisecting line will go through the apex and incisor ridge
- curvature of the cervical line is greater on M than D
9.
Mesial View - Shapes
Anterior: Triangular
Maxillary: Trapezoidal
Mandibular: Rhomboidal
Maxillary Central Incisor Root
Apex is blunt
Usually 2-3 mm longer than crown
Maxillary Lateral Incisor
- May vary more than any other*
1. May be missing
2. May have distolingual (palato-radicular) groove
3. Distal curve at apex distally
4. Little rounder on D than central incisor
5. Larger root length than crown (1.5x length of crown)
6. Lingual fossa more concave than central incisor
