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Dental Anatomy > Dental Anatomy Ch16 > Flashcards

Dental Anatomy Ch16 Flashcards

(60 cards)

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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
incisors height of contor
cervical third
26
incisors mesial contact
incisal third
27
maxillary central incisors distal contact
junction of incisal and middle thirds
28
distinguishing right from left on incisors
sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature
29
incisors root featurs
single rooted
30
maxillary insisor root features
conical shape, no proximal root concavities, rounded apex, triangular in cross section
31
maxillary lateral incisor
7 & 10
32
maxillary lateral incisor crown features
greatest crown variation, like a smaller maxillary central, prominent lingual surface, centered cingulum, pronounced marginal ridges
33
maxillary lateral incisors distal contact
middle third or junction with incisal third
34
mandibular central incisor
24 & 25
35
mandibular central incisor crown features
smallest and simplest tooth, bilaterally symmetrical, small centered cingulum, subtle lingual fossa, and equal subtle marginal ridges
36
mandibular incisor distal contact
incisal third
37
mandibular incisor root features
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
mandibular lateral incisor
23 & 26
39
mandibular lateral incisor crown features
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
permanent maxillary central incisors erupt
between 7 to 8 years of age. usually erupt after mandibular central incisors
41
why are maxillary central incisors the most prominent teeth in permanent dentition
because of their large tooth size and their anterior arch position
42
how many root canals in maxillary central incisors
one root canal which is rather large
43
pulp chamber of maxillary central incisors has
three sharp elongations, mesial, distal, and central pulp horns.
44
pulp horns correspond to the
three labial developmental lobes of the tooth
45
complete displacement of the tooth from the socket
avulsion
46
open contact can exist between the maxillary central incisors
diastema
47
supernumerary tooth between two permanent maxillary incisors. caused by abnormal initiation stage
mesiodens
48
permanent maxillary lateral incisors erupt between
8 to 9 years of age. normally erupt after maxillary central incisors
49
abnormally small teeth. maxillary lateral incisor most common
microdontia
50
instrumentation may be more difficult in area of mandibular incisors because
many patients have overlapping owing to inadequate mandibular arch size
51
developmental disturbances rarely noted in mandibular incisors but one exception
accessory root or bifurcated root
52
two branches having labial and lingual orientations
accessory root or bifurcated root
53
permanent mandibular lateral incisors erupt
between 7 and 8. erupt after mandibular central incisors
54
mandibular lateral incisors root completion
age 10
55
mandibular central incisors root completion
age 9
56
lateral incisor crown that is smaller from partial microdontia
peg lateral
57
permanent maxillary lateral incisors root completion
age 11
58
grooves evident on teeth associated with the lines of retzius in enamel
perikymata
59
slight ridges that extend mesiodistally in cervical third associated with lines of retzius in enamel
imbrication lines
60
patterns formed from pits and grooves on lingual surface of anteriors or occlusal surface of pernament posterieors
pit and groove patterns

Dental Anatomy (3 decks)

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