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Dental Assisting > CHAPTER 11: Overview of dentitions > Flashcards

CHAPTER 11: Overview of dentitions Flashcards

1
Q

name the three types of dentitions

A

Primary dentition
Mixed dentition
Permanent dentition

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2
Q

when does primary dentition start and end?

A

starts at 6 months and ends at 6 years

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3
Q

when does mixed dentition start and end?

A

starts at 6 years and ends at 12 years

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4
Q

when does permanent dentition start

A

starts at 12+ years

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5
Q

which tooth starts the primary dentition?

A

the eruption of primary mandibular central incisors

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6
Q

which tooth eruption ends primary dentition?

A

the eruption of permanent molars

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7
Q

what is the mixed dentition?

A

mixture of primary and permanent teeth

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8
Q

when does permanent dentition start?

A

when all primary teeth are lost.

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9
Q

what are dental arches?

A

where all the teeth are present

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10
Q

how many dental arches are there? what are they called

A

two
- maxillary
mandibular

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11
Q

what is occlusion?

A

when the teeth of both arches are in contact

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12
Q

what are quadrants?

A

when the maxillary and mandibular are divided into halves resulting in four sections

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13
Q

what is a sextant

A

one sixth of the dentition

division into six parts of the dental arches

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14
Q

which teeth are considered anterior teeth?

A

the incisors and canines (the teeth present when smiling)

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15
Q

which teeth are considered posterior teeth?

A

pre molars and molars

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16
Q

permanent dentition is divided into how many types of teeth?

A

4

17
Q

what are the four types of teeth called?

A

incisors
canines
pre molars
molars

18
Q

which teeth are the longest teeth in the dentition and are called the “cornerstone” of the dental arch

A

canine

19
Q

what is the function of the pre molars?

A

help grind and chew the food (specially the second pre molar)

20
Q

what are the function of the 12 molars?

A

chew and grind up food

21
Q

all crown of ANY tooth narrows towards what line? this is true for ALL types of teeth

A

cervical line (where the crown and the root meet)

22
Q

what is contact area?

A

area of the mesial or distal surface of a tooth that touches the adjacent tooth in the same arch
(teeth side by side touching each other)

23
Q

what is embrasure?

A

the triangular SPACE near gingiva between the proximal surfaces of two adjoining teeth

24
Q

what is a line angle?

A

formed by the junction of TWO surfaces. the place where two surfaces of teeth are joining.

25
Q

what is point angle?

A

angle formed by the junction of THREE surfaces at one point

26
Q

how many line angles are there in total ?

A

8

27
Q

what are the 8 line angles?

A 
MO
DO
OB
OL
MB
BB
ML
DL
28
Q

what is malocclusion?

A

when the upper and lower teeth don’t bite together properly / close correctly.

  • abnormal or malpositioned relationships of the maxillary teeth to the mandibular teeth
29
Q

what is centric occlusion?

A

when the jaws are closed in a position that produces maximum stable contact

  • jaws are centered and closed properly
30
Q

how many types of occlusions are there?

A

three

31
Q

what are the three types of occlusion?

A 
class I neutroclussion
class II distoclussion
class III mesioclussion
32
Q

Quadrant numbering for permanent teeth

A

quadrant# 1 2 3 4

teeth # 12345678

33
Q

quadrant numbering for primary teeth

A

quadrant# 5 6 7 8

teeth# 1 2 3 4 5 6 7 8

34
Q

difference between central incisor vs lateral incisor

A

central incisor is wider- squarish

lateral incisor is narrower, rectangular

35
Q

what teeth numbering system is used in the USA?

A

universal/national system

letters from A-T

36
Q

what teeth numbering system is used in CANADA?

A

ISO/FDI

quadrants of 4 and teeth numbering from 1-8

Dental Assisting (52 decks)

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