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ORAL BIOLOGY MIDTERM > CHAPTER 1 > Flashcards

CHAPTER 1 Flashcards

1
Q

the primary dentition includes how many teeth and what types?

A

8 incisors, 4 canines, and 8 molars total of 20 teeth

A-J & K-T

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2
Q

the permanent dentition includes how many teeth and what types?

A

8 incisors, 4 canines, 8 pre-molars, and 12 molars total of 32 teeth 1-16 & 17-32

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3
Q

what is the only dentition with pre-molars? and what do they replace?

A

the permanent dentition only has pre-molars and they replace the molars in the primary dentition

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4
Q

when does the primary dentition begin? what are the first teeth to erupt?

A

begins with the eruption of the primary mandibular central incisors (P&O) occurs between 6 months.

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5
Q

when do most children have all of their primary teeth by?

A

age 3

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6
Q

when do children start loosing first tooth?

A

age 6

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7
Q

what is the first permanent tooth to erupt?

A

the permanent mandibular first molar (19&30)

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8
Q

what is the mixed dentition and when does it occur?

A

it follow the primary dentition period, occurs between 6-12 year old includes both primary and permanent teeth color change between teeth comes noticeable and jaw also grows this stage is known as the ugly duckling stage

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9
Q

when does the permanent dentition begin?

A

begins with the shedding of the last primary tooth usually after 12 years old includes the eruption of all permanent teeth, expect for those teeth congenitally missing or impacted and can not erupt

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10
Q

what the D-A-Q-T system and what does it describe?

A 
it is used when describing individual teeth 
D-DENTITION (permanent, mixed, primary)
A-ARCH (maxillary arch, mandibular arch)
Q-QUADRANT (UR, UL, LR, LL)
T-TOOTH (A or 1 system)
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11
Q

what is the alveolar process?

A

bone that holds teeth in place

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12
Q

what is the alveolus?

A

the socket of each tooth

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13
Q

which teeth have a single cusp?

A

maxillary and mandibular canines

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14
Q

which teeth have two cusps?

A

maxillary pre-molars and the mandibular first premolar

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15
Q

how many cusps does the mandibular second pre-molar have?

A

3

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16
Q

what are the two places in the dentin where two mesial surfaces touch?

A

8&9 and 24&25

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17
Q

on any tooth is the CEJ curvature greater on the mesial or the distal?

A

mesial

18
Q

what are embrasures and how are they formed?

what are the different types?

A

triangles formed by slopping away of mesial and distal surfaces. Facial embrasures, lingual embrasures, incisal/occlusal embrasures, and apical embrasures with loss of tissue

19
Q

what is the height of contour for anterior teeth?

A

cervical third

20
Q

where are developmental pits located?

A

in the deepest part of each fossa

21
Q

what are the four developmental lobes for anteriors?

A

mesiolabial, middle labial, distolabial, and lingual

22
Q

what are the characteristics of the maxially central incisors?

A 
widest crown mesiodistally
greatest CEJ curvature
distal offset cingulum
shallow lingual fossa
marginal ridges
overall conical root shape
no proximal root concavities
rounded root apex
triangular root in cross section
23
Q

what are the characteristics of the maxially lateral incisors?

A 
greatest crown variations
smaller than maxially central
prominent lingual surface
centered cingulum
pronounced marginal ridges
root curves distally with sharp apex
oval root in cross section
same or longer root than central but thinner
24
Q

what are the characteristics of the mandibular central incisors?

A 
smallest and simplest tooth
bilaterally symmetrical
small centered cingulum
subtle lingual fossa
bow-shaped root on cross section
root is longer than crown
proximal root concavities give double rooted appearance
25
Q

what are the characteristics of the mandibular lateral incisors?

A 
larger than mandibular central
not bilaterally symmetrical
appears twisted distally
small an distal offset cingulum
lingual fossa
mesial marginal ridge longer than distal
26
Q

what is the longest tooth in dentition?

A

canine

27
Q

does the canine have a shorter or longer mesial cusp slope?

A

shorter, the distal cusp slope is longer

28
Q

what are the characteristics of the maxillary canines?

A

sharp cusp tip
prominent lingual anatomy
blunt root apex

29
Q

what are the characteristics of the mandibular canine?

A

smoother lingual anatomy
less sharp cusp tip
developmental depression on mesial and distal of root, giving double-rooted appearance
pointed root apex

30
Q

are permanent anterior teeth succedaneous?

A

yes

31
Q

are anterior teeth wider mesiodistally than labioligually when compared to posterior teeth?

A

yes

32
Q

what is the developmental groove?

A

on lingual surface is a sharp deep v-shaped linear depression that marks the junction between developmental lobes

33
Q

what is a supplemental groove?

A

a shallower more irregular linear depression that the developmental grooves

34
Q

what is the golden proportions?

A

a useful guideline to balance the size of teeth with one another it is phi=1.618

35
Q

what are incisors used for?

A

biting and cutting food, support lips and facial muscles, maintain vertical dimension in face, involved in speech and jaw closure

36
Q

what are hutchinsons’s incisors and what are they caused from?

A

has a crown with a screwdriver shape and is wider cervically and narrow on incisal edge it is caused from syphilis, mothers can pass to their baby

37
Q

what are peg lateral incisors?

A

a condition where the lateral incisors are undersized and appear smaller than normal.

38
Q

what are congenitally missing laterals?

A

lateral incisors that did not develop

39
Q

what are the 6 year molars?

A

3,14,19,30 (1st molars)

40
Q

what are the 12 year molars?

A

2,15,31,18 (2nd molars)

41
Q

what are the wisdom teeth that come in around 18-25?

A

1,16,32,17 (3rd molars)

42
Q

which teeth are the most common congenitally missing teeth?

A

29&20 (2nd pre-molar)

ORAL BIOLOGY MIDTERM (1 decks)

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