den 101 exam 2 chapter 11-14

dentition

the natural teeth in the dental arch

3 periods of dentition

primary/deciduous

permanent/succedaneous

mixed dentition

primary/deciduous

20 teeth (no premolars)
occurs between 6 months - 6 years

begins with eruption of primary mandibular central incisors

ends when 1st permanent mandibular molar erupts

growth of jaw bone

permanent/succedaneous

32 teeth

succeeds primary teeth

permanent premolars REPLACE primary molars

begins at 12 years ends 14/15 (except 3rd molar)

growth of jaw bone slows and eventually stops

mixed dentition (6-12yrs)

primary teeth are lost and permanent teeth erupts

begins with eruption of 1st permanent tooth and ends with the shedding od the primary tooth

color differences, crown size, crowding as teeth shift position

children have noticeable chages

maxillary arch

16 teeth

stationery (doesnt move)

mandibular arch

most used joint, 16 teeth

anterior teeth

toward the front

curved

canine to canine

incisors and canines

posterior

spaced in a straight line

premolars and molars

incisors

single rooted

sharp

thin edge (incisal edge)

cuts food

shaped like a shovel to move food in

canines (cuspids)

cut/tear food

longest teeth

long roots = best anchored and most stable

last teeth to be lost

cornerstone of the dental arch

premolars (bicuspid)

4 maxillary and 4 mandibular

cross between canines and molars

pointed buccal cusps

grips the food and lingual cusps grind it

molars

12 molars permanent

much larger than premolar

4-5 cusps on occlusal surface

maxillary and mandibular molars vary greatly from each other.

facial (outside) tooth surface

use term for any tooth

buccal - only for posterior teeth (premolar-molar)

labial - anterior

lingual tooth surface

closest to tongue (inside) ONLY MANDIBULAR

Palatal - maxillary (can be called)

occlusal tooth surface

chewing surfaces for premolar/molars

incisal tooth surface

anterior teeth

mesial tooth surface

surface closest to midline

distal tooth surface

surface farthest to midline

interproximal space

space between adjacent teeth

dental gingiva fills it

proximal surface

teeth are next to each other the surface adjacent to each

contact point

teeth touching

anatomic features of the teeth

all teeth have a curved surface unless they are fractured or worn

contours

convex - bulge out

concave - curve inward

facial/lingual contours

passageway for food

mesial/distal contours

contacts

area of the mesial/distal surface of a tooth that touches the adjacent tooth in the same arch

proper contact serves 3 functions

prevents food being trapped between

stabilizes dental arches by holding the teeth in either arch

protects the interproximal gingival tissue from trauma during mastication

prevents shifting

height of contour

the bulge or widest point on a specific surface of the crown