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2A Oral Anatomy Midterms > UNIT IV - Comparative and Descriptive Anatomy > Flashcards

UNIT IV - Comparative and Descriptive Anatomy Flashcards

1
Q

TYPES OF TEETH ACCORDING TO SHAPE

A

Homodont
Heterodont

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2
Q

TYPES OF TEETH ACCORDING TO SET

A

Monophyodont
Diphyodont
Polyphyodont

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3
Q

TYPES OF TEETH ACCORDING TO SUPPORT

A

Thecodont
Acrodont
Pleurodont

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4
Q

______ - teeth are similar in size and shape

A

HOMODONT

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5
Q

______ - teeth differ in appearance and shape along

A

HETERODONT

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6
Q

______ - one set of teeth

A

MONOPHYODONT

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7
Q

______ - two sets of teeth

A

DIPHYODONT

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8
Q

______ - multiple generations of tooth replacement

A

POLYPHYODONT

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9
Q

______ - sets in socket with the periodontal ligament

A

THECODONT

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10
Q

______ - attached to the top of the bone or shallow sockets

A

ACRODONT

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11
Q

______ - sits in shelf on inner side of the jaw bone

A

PLEURODONT

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12
Q

______ - refers to the surfaces oriented toward the face

A

FACIAL SURFACES

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13
Q

2 FACIAL SURFACES

A

Labial surface
Buccal surface

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14
Q

______ - surfaces toward the lip

A

Labial surface

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15
Q

______ - surfaces toward the cheeks

A

Buccal surface

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16
Q

______ - surfaces toward the tongue

A

LINGUAL SURFACES

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17
Q

______ - toward adjoining teeth in the same dental arch mesial surface

A

PROXIMAL SURFACES

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18
Q

2 PROXIMAL SURFACES

A

Mesial surface
Distal surface

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19
Q

______ - faced toward the median line

A

Mesial surface

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20
Q

______ - faced distant from the median line

A

Distal surface

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21
Q

______ - surfaces of the premolars and molars that come in contact with the opposite jaw during the act of closure

A

OCCLUSAL SURFACES

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22
Q

______ - surfaces of the inciosrs and canines that come in contact with the opposite jaw during the act of closure

A

INCISAL SURFACES

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23
Q

______ - formed by the junction of 2 surfaces

A

LINE ANGLE

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24
Q

______ - formed by junction of 3 surfaces

A

POINT ANGLE

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25
Q

Anterior teeth - ______ line angles

A

6

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26
Q

Posterior teeth - ______ line angles

A

8

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27
Q

Anterior teeth - ______ point angles

A

4

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28
Q

Posterior teeth - ______ point angles

A

4

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29
Q

3 APPROACHES (DIVISION OF THIRDS)

A

INCISOCERVICALLY/OCCLUSOCERVICALLY
LABIOLINGUALLY/BUCCOLINGUALLY
MESIODISTALLY

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30
Q

______
- carved out section
- depression

A

CONCAVITY

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31
Q

______
- bulging area
- elevation

A

CONVEXITY

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32
Q

______ - represents a primary center of formation

A

LOBE

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33
Q

______ - an elevation or mound on the crown portion of a tooth making up a divisional part of the occlusal surface

A

CUSP

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34
Q

______ - three rounded protuberances found on the incisal ridges of newly erupted incisor teeth

A

MAMELONS

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35
Q

______
- a smaller elevation on some portion of the crown produced by an extra formation of enamel
- considered to be a deviation from the typical form

A

TUBERCLE

36
Q

______ - “mini cusps”

A

TUBERCLE

37
Q

______ - Latin word for “girdle”

A

CINGULUM

38
Q

______ - lingual lobe for anterior tooth

A

CINGULUM

39
Q

______
- any linear elevation on the surface of the tooth
- named according to location

A

RIDGE

40
Q

EXAMPLES OF RIDGES (6)

A

MARGINAL RIDGE
INCISAL RIDGE
TRIANGULAR RIDGE
TRANSVERSE RIDGE
OBLIQUE RIDGE
CUSP RIDGE

41
Q

______ - rounded borders of the enamel that form the mesial and distal margins of the teeth.

A

MARGINAL RIDGE

42
Q

______ - rounded ridge of the incisal portion of an anterior tooth

A

INCISAL RIDGE

43
Q

______ - descend from the tip of the cusps of molars and premolars toward the central part of the occlusal surfaces

A

TRIANGULAR RIDGE

44
Q

______ - combination of two triangular ridges transversely crossing the occlusal surface

A

TRANSVERSE RIDGE

45
Q

______ - ridge crossing obliquely the occlusal surfaces of maxillary molars and formed by the union of the triangular ridge of the distobuccal cusp and distal cusp ridge of the mesiolingual cusp

A

OBLIQUE RIDGE

46
Q

______ - elevations which extend in a mesial and distal direction or buccal and lingual direction

A

CUSP RIDGE

47
Q

______ - sloping area found between 2 cusp ridges

A

INCLINED PLANE

48
Q

______ - an irregular depression or concavity on the crown of a tooth

A

FOSSA

49
Q

EXAMPLES OF FOSSA (3)

A

LINGUAL FOSSA
CENTRAL FOSSA
TRIANGULAR FOSSA

50
Q

______ - broad, shallow depression on the lingual surface of anterior teeth

A

LINGUAL FOSSA

51
Q

______ - broad and deep concavity at the central portion of occlusal surfaces of molars

A

CENTRAL FOSSA

52
Q

______ - present at the occlusal surfaces of premolars and molars between the branches of the central developmental groove when they terminate before the proximal marginal ridges

A

TRIANGULAR FOSSA

53
Q

______ - elongated valley formed by the inclines of adjacent cusps or ridges that meet at an angle

A

SULCUS

54
Q

______ - shallow linear depression

A

GROOVES

55
Q

______ - it is a shallow groove or line between the primary parts of the crown or root.

A

DEVELOPMENTAL GROOVE

56
Q

______ - less distinct, shallow linear depression on the surface of a tooth, but is supplemental to a developmental groove and does not mark the junction of primary parts.

A

SUPPLEMENTAL GROOVE

57
Q

______ - a small pinpoint depression located at the junction of developmental grooves or at the terminal of those grooves.

A

PIT

58
Q

CROWN SURFACE FORMS

There are 3 geometric figures of tooth crown surface:

A

triangular
trapezoidal
rhomboidal

59
Q

______ - figure with three straight sides and three angles.

A

TRIANGLE

60
Q

TRIANGLE

______ Surfaces
______ teeth
crowns exhibit triangular shape
base = ______ area
apex = ______ area

A

Mesial and Distal, Anterior, cervical, incisal

61
Q

______ - quadrilateral with one pair of opposite sides parallel

A

TRAPEZOID

62
Q

TRAPEZOID

______ Surfaces
outlines of the ______ aspects of all teeth is trapezoidal

______ side forms the base of the trapezoid
______ represents the shortest parallel side

A

Facial and Lingual, facial and lingual, incisal/occlusal, cervical

63
Q

TRAPEZOID

______ surfaces
______ teeth crowns are roughly trapezoidal

longest uneven sides base of the crown at the ______
uneven sides of the premolar are ______ than the molars

A

Mesial and Distal, Maxillary posterior, cervical, shorter

64
Q

TRAPEZOID

This arrangement brings out the following fundamentals of forms:

1.) Interproximal spaces may accommodate ______.

A

interproximal tissues

65
Q

TRAPEZOID

This arrangement brings out the following fundamentals of forms:

2.) Spacing between the roots of one tooth and those of another allows sufficient ______ for investment for the teeth and sufficient ______ to be consistent with the length, form, nutrition and function of the adjacent teeth

A

bone tissue, supporting structures

66
Q

TRAPEZOID

This arrangement brings out the following fundamentals of forms:

3.) Each tooth crown in the dental arches must be in contact at some points with an adjacent tooth to help protect the ______ from trauma during ______, the contact of one tooth with another in the arch tends to ensure mutual support

A

interproximal gingival tissue, mastication

67
Q

TRAPEZOID

This arrangement brings out the following fundamentals of forms:

4.) Each tooth in the dental arch has ______ antagonists in the opposing arch except the ______ and ______. In the event of loss of any tooth , this arrangement tends to prevent ______ of antagonists and help stabilize the remaining teeth

A

two, mandibular central incisors, maxillary 3rd molars, elongation

68
Q

______ - no right angles and with adjacent sides of unequal length.

A

RHOMBOID

69
Q

RHOMBOID

______ surfaces
______ teeth
crowns are somewhat rhomboid in outline, crowns incline toward the ______

A

Mesial and Distal, Mandibular posterior, lingual

70
Q

PHYSIOLOGIC FORMS (5)

A

1.Proximal contact area
2.Interproximal spaces
3.Embrasures
4.Contours
5.Curvature of Cervical line

71
Q

______ - area on the surface of the teeth where the proximal surface touch one another

A

PROXIMAL CONTACT AREA

72
Q

______ - distal contact area touches the mesial contact area of the tooth posterior to it

A

PROXIMAL CONTACT AREA

73
Q

______ is located on the mesial and distal surface of each tooth at the widest portion and the greatest curvature

A

proximal contact area

74
Q

______ - are triangular-shaped spaces between the teeth formed by the bone on one side and the proximal surfaces and the contact area on the other side

A

INTERPROXIMAL SPACES

75
Q

______ - the contact area forms the apex if the triangle and the alveolar bone makes up the base

A

INTERPROXIMAL SPACES

76
Q

______ - these spaces are normally filled with gingival tissue called interdental papilla (gingival papilla)

A

INTERPROXIMAL SPACES

77
Q

______ - shape aids in the self-cleansing process of the dentition

A

INTERPROXIMAL SPACES

78
Q

______ - “spillways”

A

EMBRASURE

79
Q

______ - open space between the proximal surfaces of two teeth where they diverge buccally, labially, lingually and occlusally from the contact area
- named according to location depending upon from which aspect the teeth are viewed

A

EMBRASURE

80
Q

Proper embrasure has 2 main purposes
➢ To serve as ______ during mastication
➢ To serve as an integral part of the ______ of the tooth

A

spillways for the food material, self-cleansing process

81
Q

EMBRASURE

Some general rules regenerate normal embrasure forms:

1.) From the facial or lingual aspect, incisal or occlusal embrasure ______ in relative size from the anterior teeth toward the posterior

A

increases

82
Q

EMBRASURE

Some general rules regenerate normal embrasure forms:

2.) From the facial or lingual aspect, cervical or gingival embrasure ______ in relative size in anterior teeth

A

decreases

83
Q

EMBRASURE

Some general rules regenerate normal embrasure forms:

3.) From the incisal aspect, the labial and lingual embrasures ______ in size in anterior teeth

A

nearly equal

84
Q

EMBRASURE

Some general rules regenerate normal embrasure forms:

4.) From the occlusal aspect, the lingual embrasure is normally ______ than the buccal embrasure in posterior teeth

A

larger

85
Q

EMBRASURE

Some general rules regenerate normal embrasure forms:

5.) When one side of the embrasure has a certain contour, the other side of the embrasure will normally have a ______

A

similar contour

86
Q

______ (______) is the area of contour on the facial and lingual surface

These contours are for the proper protection of ______

A

Height of contour, crest of curvature, gingival tissue

87
Q

______ - A summary of the height of periodontal attachment interproximally indicates the attachment to be highest at the median line on central incisors. In distal progression the height of attachment decreases along with the decrease in curvature of CEJs until the mesial surface of the first premolar is reached. From this point distally through third molars, curvatures are slight.

A

CURVATURE OF CERVICAL LINE

2A Oral Anatomy Midterms (2 decks)

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