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Dental Assisting > Tooth Morphology > Flashcards

Tooth Morphology Flashcards

1
Q

Morphology

A

The study of the form of an organ or body part

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2
Q

Tooth morphology

A

Study of the size, shape, form and structure of the teeth

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3
Q

How many dental arches do we have?

A

2

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4
Q

What are the two dental arches

A

Maxillary and mandibular

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5
Q

Occlusion is when?

A

The teeth in both arches are in contact

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6
Q

Dentition refers to

A

The arrangement of the teeth as a set; the natural teeth in the dental arch

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7
Q

Primary dentition

A

Baby teeth

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8
Q

Permanent dentition

A

Adult teeth

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9
Q

How many dentition periods?

A

3

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10
Q

What are the 3 dentition periods?

A

Primary, mixed, permanent

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11
Q

Primary (deciduous) dentition

A

Assists with speech, provides chewing surfaces to strengthen muscles of mastication
-important for guiding permanent teeth into proper position

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12
Q

Premature loss of primary teeth can lead to problems in

A

Alignment, spacing and occlusion of permanent dentition

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13
Q

In primary dentition there is a total of how many teeth and when does it occur ?

A

20 teeth. Occurs between 6 months and 6 years of age

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14
Q

Mixed dentition

A

Occurs between 6 and 12 years when primary teeth are exfoliating and permanent teeth are erupting

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15
Q

Succedaneous teeth

A

Permanent teeth that replace deciduous teeth

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16
Q

How many teeth in the permanent dentition

A

32

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17
Q

Anterior teeth

A

Incisors and canines (cuspids)

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18
Q

Posterior teeth

A

Premolars (bicuspids) and molars

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19
Q

Each arch can be divided into 2 what?

A

Sextants

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20
Q

Sextants are

A

1/6th of the dentition

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21
Q

Sextants divided

A

into maxillary right and left (posterior and anterior)

Mandibular right and left (posterior and anterior)

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22
Q

Quadrants make up

A

1/4 of the dentition

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23
Q

Mesial

A

Toward midline

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24
Q

Distal

A

Away from midline

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25
Q

Lingual

A

Inside, toward tongue

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26
Q

Labial

A

Outside toward lips

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27
Q

Incisal

A

Biting or cutting edge

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28
Q

Buccal

A

Outside, toward cheeks

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29
Q

Occlusal

A

Grinding or chewing surface

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30
Q

Major elevation on the masticatory surfaces of the canines and posterior teeth

A

Cusp

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31
Q

Fossa

A

Wide shallow depression on the lingual surfaces of anterior teeth and occlusal surfaces of posterior teeth

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32
Q

Raised, rounded area on the cervical third of the lingual surface.

A

Cingulum

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33
Q

Ridge

A

Thin elongated surface

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34
Q

Mamelon

A

Rounded enamel extensions on the incisal edge of newly erupted incisors

35
Q

The 5th supplemental cusp found lingual to the mesiolingual cusp

A

Cusp of carabelli

36
Q

Central groove

A

Most prominent groove on posterior teeth

37
Q

Function of the incisor

A

Cut food without heavy force

38
Q

Canines

A

Cutting and tearing of food with force

39
Q

Premolars

A

Grasping, tearing, grinding

40
Q

Molars

A

Chew and grind food

41
Q

3 anatomical features of teeth are

A

Contours, contacts and embrasures

42
Q

Contour is

A

Crown of the tooth which narrows towards the cervical line

43
Q

The mesial or distal surface of a tooth that touches the adjacent tooth in the same arch

A

Contact area

44
Q

Contact point

A

Exact spot at which the teeth actually touch each other

45
Q

Contacts do what?

A

Prevent food impact ion, protects interproximal tissues and stabilizes the arches

46
Q

An embrassure is what

A

Is a triangular space between the proximal surfaces of two adjoining teeth in contact

47
Q

A line angle is a junction of how many walls

A

2

48
Q

A point angle is formed by the junction of how many surfaces

A

3

49
Q

Both primary and permanent anterior teeth have how many roots

A

1

50
Q

All premolars/bicuspids have how many roots. The exception is the max. First pre molar and it has how many?

A

Premolars/bicuspids have 1

Max first premolar has 2

51
Q

All max molars have how many well formed & separated roots? except for the third molar

A

3

52
Q

All mand molars have how many well formed & separated roots?

A

2

53
Q

What are the 3 tooth numbering systems

A

Universal, international/FDI and Palmer

54
Q

What does MODBL stand for

A

Mesio-occluso-disto-bucco-lingual

55
Q

OB stands for

A

Occlusobuccal

56
Q

Date of eruption for a central incisor

A

6-10months

57
Q

Date of eruption for lateral incisor

A

9-12 months

58
Q

Date of eruption for first molar

A

12-18 months

59
Q

Date of eruption for canine

A

16-22 months

60
Q

Date of eruption for second molar

A

24-32 months

61
Q

Habits such as thumb sucking or improper swallowing habit can affect

A

Occlusion

62
Q

Centric occlusion

A

Jaws are closed in a position that produce maximal stable contact between the occluding surfaces of the max and mand teeth

63
Q

Functional occlusion

A

Contact of the the teeth during biting and chewing movements

64
Q

Malocclusion

A

Abnormal relationship of the teeth

65
Q

Normal occlusion is when

A

Mesiobuccal cusp of permanent maxillary first molar occluded with mesiobuccal groove of the mandibular first molar

66
Q

Maxillary canine occluded with distal half of mand canine and the mesial half of the mand premolar

A

Normal occlusion

67
Q

Basis of angles classification system is that

A

The permanent maxillary first molar is the key to occlusion

68
Q

There are three classifications of occlusion

A 
Class 1
Class 2 which is split into division 1 and 2 
And class 3
69
Q

Class 1 occlusion is knows as a

A

Neutroclusion

70
Q

Neutroclusion is when

A

The mesiobuccal cusp of permanent maxillary first molar occluded with the mesiobuccal groove of the mandibular first molar

Also known as crooked teeth caused by crowding or spacing

71
Q

Class 2 is known as

A

Distoclusion

72
Q

Distoclusion is when

A

Mesiobuccal cusp of permanent maxillary first molar occluded mesial to the mesiobuccal groove of the mandibular first molar

Also known as an overbite

73
Q

Class 3 is known as

A

Mesioclusion

74
Q

Mesioclusion is when

A

Mesiobuccal cusp of permanent maxillary first molar occludes distal to the mesiobuccal groove of the mandibular first molar

Also known as an underbite

75
Q

Curve of spee

A

What is the name for the arc of the occlusal plane

76
Q

Curve of Wilson

A

Defined by a line drawn across the occlusion surface of the left mandibular first molar across the arch and through the occlusal surface of the right mandibular first molar

77
Q

Antagonist

A

Every tooth in the oral cavity has 2 antagonists EXCEPT THE MANDIBULAR central incisors and maxillary 3rd molars

78
Q

Cavity class 1

A

Occlusal on posteriors and lingual out of anteriors

79
Q

Cavity class 2

A

Proximal surfaces of posteriors

In between sides touching other teeth, hard to see

80
Q

Cavity class 3

A

Proximal surfaces of incisors and canines

same as 2 just on different teeth

81
Q

Cavity class 4

A

Proximal surfaces of incisors and canines, similar to class 3 except it includes the incisal edge

82
Q

Cavity class 5

A

Gingival third of the facial or lingual surface of any tooth

Near base of tooth above gums

83
Q

Cavity class 6

A

Incisal edges of anterior teeth
Cusp tips of posterior teeth

Appears as lesions on biting surface of teeth

Dental Assisting (32 decks)

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