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Development of the Dentition Flashcards

1
Q

what is an overjet

A

distance between the upper and lower incisors in the horizontal plane.

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2
Q

what is the distance of a normal overjet

A

2-4mm

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3
Q

what is an overbite

A

vertical overlap of the upper and lower incisors when viewed anteriorly.

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4
Q

what is the distance of a normal bite

A

one third to one half coverage of the lower incisors

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5
Q

what is crowding

A

when there is insufficient space to accommodate the teeth in perfect alignment

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6
Q

what is hypodontia

A

congenital absence of one or more teeth

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7
Q

what is leeway space

A

difference in the mesio-distal diameter between c, d and e and 3, 5 and 5

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8
Q

what is a reverse overjet

A

the lower incisors lie anterior to upper incisors

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9
Q

what is a supernumerary tooth

A

an additioanl tooth to the normal series

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10
Q

what is malocclusion

A

variation from ideal occlusion which has dental health and psychosocial implications for the individual

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11
Q

what is ideal occlusion

A

anatomically perfect arrangement of the teeth

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12
Q

what is normal occlusion

A

acceptable variation from ideal occlusion

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13
Q

what is a buccal crossbite

A

the buccal cusps of the lower premolars and or molars occlude buccaly to the buccal cusps of the upper premolars and or molars

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14
Q

what are natal teeth

A

a tooth present at birth

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15
Q

what are neonatal teeth

A

teeth that erupt soon after birth

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16
Q

what is macrodont

A

an abnormally large tooth

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17
Q

what is transposition

A

a term used to describe the interchange in position of two teeth

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18
Q

what is BSI

A

incisor classification

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19
Q

what are the incisor classifications

A

class I
class II, division 1
class II, division 2
class III

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20
Q

describe incisor classification I

A

the lower incisor edges occlude with or lie immediately below the cingulum plataeu of the upper central incisors

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21
Q

describe incisor classification class II, div 1

A
  • lower incisor edges lie posterior to the cingulum plataeu of the upper incisors
  • upper central incisors are proclined of average inclindation, overjet is increased
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22
Q
A

class II, division 1

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23
Q

describe class II, div 2 of the incisor classification

A

lower incisal edges lie posterior to the cingulum plataeu of the upper incisors
upper central incisors are usually retroclined and the overjet is usually minimal but can be increased

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24
Q
A

class II, div 2

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25
describe class III of incisal classification
lower incisor edges lie anterior to the cingulum plateau of the upper incisors
26
class III
27
what is orthodontics
branch of dentistry concerned with facial growth with development of the dentition and occlusion, and with the diagnosis, interception and treatment of occlusal anomalies
28
what are the main stages of dentition development
newborn primary dentition mixed dentition permanent dentition
29
when does mixed dentition arise
6-13
30
describe the age range of permanent tooth eruption
between 6 and 13 years
31
which teeth are the first permanent teeth to erupt
first molars and incisors
32
when do first permanent molars erupt
6-8.5 years
33
when do permanent incisors erupt
6-8.5 years
34
anterior cross bite
35
increased overjet
36
reverse overjet
37
posterior buccal crossbite
38
what is mixed dentition
a mixture of primary and permanent teeth
39
when do canines, premolars and second molars erupt in mixed dentition
between 10 and 12.5 years
40
which permanent teeth erupt at 6
lower central incisors upper molars lower molars
41
which teeth erupt at seven years
upper central incisors lower lateral incisors
42
which teeth erupt at eight years
upper laterals
43
which teeth erupt at eleven years
lower canines upper first premolars lower first premolars
44
which teeth erupt at 12 years
upper canines upper second premolars lower second premolars upper and lower second molars
45
describe the eruption sequence of lower 3 4 and 5
3,4 then 5
46
describe the normal eruption sequence of upper 3, 4 and 5
4 5 and then 3
47
why does the posteior arch length increase
to accommodate the 6, 7 and 8
48
what does leeway space do
allow for lower incisors to align spontaneously following loss of d and e
49
what is the normal leeway space for the maxilla
1.5mm
50
what is the normal leeway space for the mandible
2.5mm
51
crowding
52
transposition
53
describe ideal molar occlusion
mesiobuccal cusp of the upper permanent molar occludes with the buccal groove on the mandible first molar
54
describe ideal incisal occlusion
slightly proclined so the lower incisal edge is in contact with the cingulum plateau of the maxillary teeth. the overjet and overbite 2-4mm on average
55
describe the dentition of newborns
usually there are no teeth they have gum pads and an anterior open bite
56
describe the hsape of the upper gum pad on newborns
rounded
57
describe the shape of the lower gum pad of newborns
u shaped
58
what is the classification of newborn jaws
skeletal class 2
59
describe what AP jaw relationship classifications are
skeletal class one skeletal class two skeletal class three
60
what is skeletal class one
where the mandible is 2-3mm posterior to the maxilla
61
what is skeletal class two
when the mandible is retruded relative to the maxilla
62
what is skeletal class three
when the mandible is protruded relative to the maxilla
63
skeletal class one
64
skeletal class three
65
skeletal class two
66
result of cleft palate correction surgery
67
when does primary dentition eruption first occur
6 months
68
what is the age range of eruption for primary dentition
6 month to three years
69
when do central incisors on primary dentition erupt
6-7 months
70
when do lateral incisors on primary denttion erupt
7-8 months
71
when do canines on primary dentition erupt
18-20 months
72
when do first molars erupt in primary dentition
12-15 months
73
when do second molars erupt in primary dentition
24-36 months
74
how can primary dentition be described
space experiences wear toward the end incisors are more upright than in permanent dentition
75
no spacing
66% crowding
76
less than 3mm spacing
50% crowding
77
between 3-6mm crowding
20% crowding
78
more than 6mm spacing
no crowding
79
how common is natal teeth
1 in 1000 infants
80
what is a unilateral cleft lip
a cleft affecting only one side of the lip
81
what is a bilateral cleft lip
a cleft affected both sides of the lip
82
what causes a cleft lip
failure of the lip and palate to unite during inter uterine development
83
when is surgery carried out on cleft lips
six months of age
84
what is an issue with repairing the cleft palate
scar tissue can cause contraction or restriction of growth of the maxillary dental arch
85
why do primary dentition experience wear near the end of their time
the enamel is softer and is not designed to last the individuals entire life
86
what is asymmetrical eruption
when tooth on one side erupts and the tooth on the other does not eg laterals
87
what is asequential eruption
when the laterals arise before the central incisors - improper sequence of eruption
88
list the order of primary dentition eruption
8 months - lower central incisors 10 - upper central incisors 11 months - upper lateral incisors 13 months - upper lateral incisors 16 months - first molars 19 months - upper canines 20 months - lower canines 27-29 months - second molars
89
list the order of permanent dentition eruption
6 years - lower central incisors, first molars 7 years - upper central incisors, lower lateral incisors 8 years - upper laterals 11 years - lower canines, first premolars 12 - upper canines, second molars, second premolars

Clinical (27 decks)

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