Flashcards in Overview of Primary teeth Deck (28):
how many primary teeth?
what three annotations can be used?
palmer: quadrant with letter A-E
FDI International: 5-8 with 1-5
Central Incisors eruption age?
Lateral Incisors eruption age?
First molar eruption age?
canine eruption age?
second molar eruption age?
C: 6-7, 7-8
L: 7-8, 8-9
Canine: 10-12, 10-18
First molar: 9-10, 11-12
Second molar: 11-12, 10-12
Where is there no cervical ridge located at?
all surfaces except lingual of molars
longer, narrower and root trunk is nearly absent
color of tooth
whiter because thinner than enamel
which molar is bigger?
the second> first
enamel, dentin, and pulp characteristics
enamel and dentin are thinner
pulp is relatively large and the pulp horns are more accentuated especially the mesial of decidious molars
3 functions of primary dentition
1. maintain space
2. flared roots to prevent mesial drift
3. guide for permanent dentition
type traits of primary maxillary central incisors
no mamelons; wide m-D
type traits of primary canines
contacts are at the same level
type traits of primary molars
2nd looks like a permanent 1st molar
# of roots, and cusps in maxillary 1st molar (primary dentition)
# of roots, and cusps in mandibular 1st molar (primary dentition)
4 functions of dental curvature
1. stabilize arch
2. prevent disease (self cleansing)
3. disperse occlusal forces
4. protect soft tissues (symbionic relationship)
with an improper curvature what 3 possibilities can arise
1. premature tooth loss
2. periodontal problems
3. occlusal discrepancies
what is proximal contact areas?
defined as adjacent tooth surfaces that touch
what 2 things does proximal contact areas increase to?
1. due to attrition
2. toward posterior (back of mouth)
where are contact locations in the anterior and posterior teeth?
anterior: incisally placed=centered Facial-Lingual
posterior: usually middle 1/3 but more buccal of the center
two importances of food
1. food-prevent impaction
2. stabilization of the arch-synergy of stabilization
^^ most important
what are 2 outcomes from improper contacts?
2. alignment changes which will lead to bone and muscular changes and may destroy tooth structure and the support system
what shape of embrasures form around proximal contact?