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Oral Anatomy FINAL > Primary Dentition > Flashcards

Primary Dentition Flashcards

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1
Q

which tooth does the primary md 2nd molar resemble

A

permanent md 1st molar
more convex, rounded, convergence towards occlusal, larger buccal cervical ridge
M root longer/wider than D - same

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2
Q

the cingulum of the primary mx central is _____ compared to permanent mx central

A

highly developed

extending nearly to incisal ridge - further than permanent

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3
Q

which primary tooth varies in form from any other primary or permanent tooth

A

primary 1st molars

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4
Q

which is the largest of the primary anteriors

A

canine

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5
Q

which is the smallest primary molar in all dimensions (except BL):

A

primary mx 1st molar

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6
Q

which cusp of the primary md 1st molar is distinctly longer, angular and sharper?

A

mesio lingual
forms greater part of occlusal table
unique feature to this tooth
usually longest

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7
Q

how does the CEJ differ in primary teeth vs permanent in relation to enamel thickness

A

enamel ends abuptly at cervical line rather than becoming thinner

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8
Q

major differences between primary mx central vs. permanent

A

no mamelons
MD dimension greater than IC
prominent cervical ridge

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9
Q

primary md molars have how many roots

A

2

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10
Q

General differentiating chracteristics of primary md centrals

A

symmetrical from facial, lingual, incisal

crown wide MDlly to IC when compared to permanent (not wider MD than IC)

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11
Q

neonatal lines

A

growth line formed at birth

permanent and primary

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12
Q

the enamel of primary teeth are _____ compared to permanent

A

thinner

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13
Q

primary teeth are generally smaller than permanent counterparts EXCEPT

A

mesiodistal dimension of permanent premolars

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14
Q

the pronounced cervical convexity on lingual and facial profiles of primary md centrals does what

A

adds strength to tooth

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15
Q

how many cusps does a primary md 1st molar have

A

4

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16
Q

primary teeth are _____ IC and _____ MD

A

short incisocervically

flat mesiodistally

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17
Q

list the fossae of the primary mx 1st molar from largest to smallest

A

central - angular and deep in unworn teeth
mesial - well defined
distal (if present) - shallow, poorly defined - only in 4 cusp variation

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18
Q

enamel of primary teeth appears more ____

A

opaque

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19
Q

which cusp takes up 2/3rds of the occlusal profile of primary mx 1st molars when viewed from buccal

A

mesiobuccal

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20
Q

the occlusal tables of primary molars are ____ than permanent

A

narrower

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21
Q

how many cusps does a primary mx 1st molar have

A

3
2 buccal
1 lingual

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22
Q

compared to permanent, the molar roots of the primary teeth are ____ and ____ relative to the crown height OC

A

long, slender

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23
Q

the enamel of primary teeth is _____ than permanent

A

thinner

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24
Q

how does the primary mx 2nd molar differ from the permanent mx 1st molar

A 
smaller
more angular
surfaces more convex
more occlusal convergence
larger buccal cervical ridge
smaller root trunk
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25
primary teeth erupt more ______ than permanent
vertically
26
crown of primary teeth are _______ MD relative to their IC height when compared to permanent
wider
27
Why is the primary 2nd molar considered isomorphic?
can predict form of permanent mx 1st molar from the primary 2nd molar
28
the M and D profiles of the primary mx canine are ______ than primary mx central and lateral
more convex
29
how do the roots of the primary mx 2nd molar differ from the primary mx 1st molar
larger | more divergent
30
all molars (primary and permanent) have a cervical third that is wider FL than middle third, but it is more pronounced on primary molars because:
greater taper of B and L towards occlusal | prominent B cervical ridge
31
where is the primate space
mx in front of primary canine | md behind primary canine
32
how many roots and pulp canals do the primary md 1st molar have
2 roots - 3 pulp canals | 2 canals in mesial root
33
describe the occlusal profile of the primary mx 1st molar
scalloped no definite cusp form cusps not as prominent as permanent
34
describe how the roots of the primary molars are shaped so as to allow for the eruption of permanent teeth
divergent roots | short root trunk
35
which tooth does the primary mx 2nd molar resemble
permanent mx 1st molar
36
what are the 2 most constant features of the primary mx 1st molar
deep central pit | distinct buccal cervical ridge (stronger at mesial)
37
the primary md 1st molar has lingual convergence ONLY on the _____
mesial
38
what feature gives primary molars the appearance of a constricted occlusal table
buccal cervical bulge
39
why is the distolingual cusp of the primary md 1st more rounded in comparison to the mesiolingual?
centric cusp
40
the primary second molars of both arches have a form similar to...
permanent 1st molars
41
primary crowns are shaped...
short, squat
42
The root of the primary md central is ______x the length of the crown
2
43
does the primary mx 1st molar have an oblique ridge?
yes | ML - DB cusp
44
roots of primary teeth are completed by
3.25 years
45
when viewed from the buccal, why does the crown of the primary mx 1st molar appear to be offset towards mesial
mesial longer than distal - mesial cervical line extends more into root
46
how are the buccal cusps of the primary md 2nd molar different than the permanent md 1st molar
all buccal cusps about equal in size
47
the contacts of the primary mx canine are
at same level | different than permanent
48
from the incisal, the MD and FL dimension of the primary md central is
nearly equal
49
there is no distinct demarcation of pulp cavity into pulp chamber and root canals in ____
incisors, canines | anteriors
50
the primary mx 1st molar converges ______ and ______
lingually and distally
51
when do primary teeth begin developing
6 weeks in utero
52
List roots of primary mx 1st molar from longest to shortest
lingual mesiobuccal distobuccal
53
resorption in primary teeth is ______, resorption in permanent teeth is ______
normal | pathological
54
the cervical bulge of the F and L surface of the primary mx canine is ____ compared to the incisors
greater proportion | FL dimension greater (strong tooth)
55
Which pulp horn of the primary mx 1st molar is near the occlusal surface
mesial
56
crowns of primary teeth are completed within
1st year
57
what causes the more exaggerated constriction at the cervical line of anterior primary teeth
lingual/buccal bulge at cervical (cervical ridge)
58
incisal edge of primary md central is...
centered over crown and root | permanent - lingual to center
59
primary teeth contact areas are more...
flat | broad
60
the root trunk of primary molar roots is...
not distinguishable
61
Importance of primary teeth
``` mastication space maintenance for permanent dentition (primate space) stimulates jaw growth through fxn phonetics cosmetics ```
62
what are the two most constant features of the primary md 1st molar
deep central pit | distinct buccal cervical ridge - extends into root on mesial
63
the primary mx laterals resemble the primary mx centrals, except:
smaller in all dimensions wider IC than MD incisal angles more rounded marginal ridges more prominent (deeper lingual fossa) root longer and sharper relative to crown
64
which cusp is the most prominent of the primary mx 1st molar
lingual (or mesiolingual if there are 4 cusps)
65
how many cusps does a primary mx 2nd molar have
4, sometimes 5
66
which tooth does the primary md 1st molar resemble
none
67
describe the occlusal table of the primary mx 2nd molar
like permanent mx 1st molar kinda rhomboidal lingual and distal convergence four well developed cusps, one supplemental (like cusp of carabelli, maybe)
68
how does the primary 2nd molar differ from the primary 1st molar?
heaver | longer
69
enamel of the primary teeth appears _____ in comparison to permanent
smoother | less evidence of developmental grooves and despressions
70
the primary molar roots are _____ MD and _____ BL
narrow mesiodistally | very broad buccolingually
71
the crown of the primary mx 1st molar does not resemble any primary or permanent tooth - what tooth does it look most like?
intermediate between premolar and molar | mx premolar
72
primary teeth have ____ color
lighter
73
the primary md canine has the same general form of the mx primary canine except...
``` Main difference in dimensions narrower MD - IC height noticeably different cusp tip leans MESIALLY pointed sharp cusp anatomy less pronounced not as bulbous narrower FL shorter root ```
74
which tooth have a root outline different than any other tooth? which root? how?
``` mesial root of the primary md 1st molar outline drops straight to apical third root end almost square also: - longer and wider than D root - both proximal surfaces have concavities ```
75
the primary md laterals are similar to primary md centrals, except:
``` bigger in almost all dimensions (IC, MD) not symmetrical from incisal - incisal edge lingually placed - cingulum distally placed incisal slopes towards distal - DI edges more rounded - distal contact more apical cingulum and marginal ridges more prominent (lingual fossa deeper) Root has distal curvature, distal longitudinal groove ```
76
describe the root trunk of the primary mx 1st molar
short thick deeply grooved M, D, B
77
primary molars have a cervical bulge on which surfaces
buccal only
78
cusp tip of primary mx canine offset to _____
distal | OPPOSITE OF PERMANENT
79
crowns of primary molars have _____ buccal and lingual surfaces from O to cervical ridges
flatter
80
the ______ ridge is prominent on the primary mx 1st molar
transverse ridge | MB - ML cusps
81
the primary md 1st molar has a prominent _____ ridge
transverse
82
primary mx molars have how many roots
3
83
the marginal ridges and cingulum of the primary md central...
more developed than permanent | less developed than mx primary
84
how does the incisal profile of the primary mx canine differ from the permanent?
cusp longer and sharper | M cusp ridge longer than D cusp ridge (OPPOSITE)
85
pulp horns of primary teeth are ______, especially _____
long, sharp, prominent | especially on mesiobuccal
86
crowns of primary teeth are ____ compared to permanent relative to total crown root length
short
87
which of the buccal/lingual cusps of the primary mx 2nd molar is longer?
mesiobuccal | mesiolingual (largest)
88
primary mx 1st molar - B and L surfaces _____ towards occlusal
converge
89
primary teeth develop _____, permanent teeth develop ____
quickly | slowely
90
Which is the only anterior tooth in which the MD crown dimension is greater than the IC dimension
primary mx central | maybe mx canine
91
dentin of primary teeth vs. permanent is _____ except _____
thinner | occlusal of molars over central sulcus
92
pulp cavities of primary teeth are _____ vs permanent
larger

Oral Anatomy FINAL (2 decks)

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