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Dental Anatomy > Dental Anatomy Ch16 > Flashcards

Dental Anatomy Ch16 Flashcards

1
Q

permanent anterior teeth include

A

incisors and canines

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2
Q

four developmental lobes

A

labial lobes: mesiolabial, middle labial, and distolabial

lingual lobe

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3
Q

two vertical labial________outline the separations among the labial developmental lobes

A

developmental depressions

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4
Q

each one replaces the primary tooth of the same type

A

succedaneous

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5
Q

from labial and lingual, the crown outline is

A

trapezoidal, or four sided

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6
Q

when viewed from the proximal the crown outline is

A

triangular

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7
Q

crest of curvature

A

height of contour

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8
Q

rounded raised boarders on mesial and distal parts of lingual surface of anteriors

A

marginal ridges

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9
Q

raised and rounded area on the cervical third of lingual surface on anteriors

A

cingulum

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10
Q

shallow, wide depressions on lingual surface

A

fossa or fossae

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11
Q

pits on lingual surface of anteriors

A

developmental pits

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12
Q

primary groove that marks junction among developmental lobes on lingual surface of anteriors

A

developmental groove

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13
Q

secondary groove on lingual surface of anteriors

A

supplemental groove

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14
Q

patients may have difficulty in maintianing homecare of anteriors because of their

A

dental arch

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15
Q

dental arch position

A

may allow lips to overhang the teeth. patients can clean only incisal two-thirds of crown

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16
Q

grooves on the lingual surface of anteriors may present

A

areas for dental biofilm retention

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17
Q

rounded enamel extensions on the incisal ridge from the labial or lingual views

A

mamelons

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18
Q

incisors are only permanaent teeth with two_______formed from the incisal ridge or incisal edge of each proximal surface

A

incisal angals

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19
Q

a linear elevation on the masticatory or incisal surface when newly erupted

A

incisal ridge

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20
Q

wearing away of a tooth surface caused by tooth-to-tooth contact

A

attrition

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21
Q

disturbance leaves the tooth with a deep lingual pit resulting from invagination of the enamel organ into the dental papilla. may lead to pupal exposure. may be hereditary. most common w/ maxillary lateral incisor

A

dens in dente

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22
Q

pregnant woman w/ syphilis can cause baby to have localized enamel hypoplasia during tooth development

A

hutchinson’s incisors

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23
Q

maxillary central incisor

A

8 & 9

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24
Q

maxillary central incisor crown featurs

A 
widest crown MD
greatest CEJ curve & height of contour
distal offset cingulum
shallow lingual fossa
marginal ridges
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25
Q

incisors height of contor

A

cervical third

26
Q

incisors mesial contact

A

incisal third

27
Q

maxillary central incisors distal contact

A

junction of incisal and middle thirds

28
Q

distinguishing right from left on incisors

A

sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature

29
Q

incisors root featurs

A

single rooted

30
Q

maxillary insisor root features

A

conical shape, no proximal root concavities, rounded apex, triangular in cross section

31
Q

maxillary lateral incisor

A

7 & 10

32
Q

maxillary lateral incisor crown features

A

greatest crown variation, like a smaller maxillary central, prominent lingual surface, centered cingulum, pronounced marginal ridges

33
Q

maxillary lateral incisors distal contact

A

middle third or junction with incisal third

34
Q

mandibular central incisor

A

24 & 25

35
Q

mandibular central incisor crown features

A

smallest and simplest tooth, bilaterally symmetrical, small centered cingulum, subtle lingual fossa, and equal subtle marginal ridges

36
Q

mandibular incisor distal contact

A

incisal third

37
Q

mandibular incisor root features

A

bow shaped on cross section, root longer than crown, proximal root concavities give double rooted appearance, root curves distally w/ sharp apex, oval in cross section, same or longer than central but thinner

38
Q

mandibular lateral incisor

A

23 & 26

39
Q

mandibular lateral incisor crown features

A

like larger mandibular central, not bilaterally symmetrical; appears twisted distally, small, distally placed cingulum, lingual fossa and moderate mesial marginal ridge longer than distal

40
Q

permanent maxillary central incisors erupt

A

between 7 to 8 years of age. usually erupt after mandibular central incisors

41
Q

why are maxillary central incisors the most prominent teeth in permanent dentition

A

because of their large tooth size and their anterior arch position

42
Q

how many root canals in maxillary central incisors

A

one root canal which is rather large

43
Q

pulp chamber of maxillary central incisors has

A

three sharp elongations, mesial, distal, and central pulp horns.

44
Q

pulp horns correspond to the

A

three labial developmental lobes of the tooth

45
Q

complete displacement of the tooth from the socket

A

avulsion

46
Q

open contact can exist between the maxillary central incisors

A

diastema

47
Q

supernumerary tooth between two permanent maxillary incisors. caused by abnormal initiation stage

A

mesiodens

48
Q

permanent maxillary lateral incisors erupt between

A

8 to 9 years of age. normally erupt after maxillary central incisors

49
Q

abnormally small teeth. maxillary lateral incisor most common

A

microdontia

50
Q

instrumentation may be more difficult in area of mandibular incisors because

A

many patients have overlapping owing to inadequate mandibular arch size

51
Q

developmental disturbances rarely noted in mandibular incisors but one exception

A

accessory root or bifurcated root

52
Q

two branches having labial and lingual orientations

A

accessory root or bifurcated root

53
Q

permanent mandibular lateral incisors erupt

A

between 7 and 8. erupt after mandibular central incisors

54
Q

mandibular lateral incisors root completion

A

age 10

55
Q

mandibular central incisors root completion

A

age 9

56
Q

lateral incisor crown that is smaller from partial microdontia

A

peg lateral

57
Q

permanent maxillary lateral incisors root completion

A

age 11

58
Q

grooves evident on teeth associated with the lines of retzius in enamel

A

perikymata

59
Q

slight ridges that extend mesiodistally in cervical third associated with lines of retzius in enamel

A

imbrication lines

60
Q

patterns formed from pits and grooves on lingual surface of anteriors or occlusal surface of pernament posterieors

A

pit and groove patterns

Dental Anatomy (3 decks)

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