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Orthodontics Exam1 > exam 1 (2nd round ) > Flashcards

exam 1 (2nd round ) Flashcards

(56 cards)

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1
Q

Dr. Ed Angle

A

Father of modern orthodontics

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2
Q

Line of occlusion

A

a smooth curve passing through central fossa of upper molar….. and Across the cingulum of upper canines and incisors

Same line runs along.. buccal cusp and incisal edge of lower teeth

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3
Q

Competent lips

A

patients can close lips at rest without muscle strain

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4
Q

What of critcisms of angles classification

A

no skeletal consideration.
only considers Anteroir-posterion position
assume upper 1st molar was always in correct position

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5
Q

Most common malocclusion

A

Class 1

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6
Q

radiographic Cephalometrics is used for

A

Research: Observe pattern of growth
Diagnostic: Characteristic of dental/skeletal relation
Evalution purposes : measure change in tooth jaw position

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7
Q

Skeleta malocclusion paterns

A

Class 1- well proportion jaws
Class 2- mandible is retusive relative to maxilla
Class 3-mandible is protusive relative to maxilla

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8
Q

what are the 3 facial profiles

A

Straight,
convex,
f concave
(Deciided by forehead, Nose Chin)

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9
Q

Classification of Facial pattern

A

brachyfacial - short face

Dolicofacial- long face

Mesofacial- average

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10
Q

Brachyfacial

A

broad square face

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11
Q

Chin projection

A

retrognaptic- retruded chin

Prognathic- protruded chin

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12
Q

normal vs abonormal swallowing

A

Normal- tongue against palate

Abnormal swallowing - tongur protudes , cause crossbite

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13
Q

Finding in patient with mouth breathing

A

Increased facial height
super eruption of posterior teeth
Downward and backward rotation of mandible
opening Bite anteriorly
OVERJET
ADENOID FACE— not all caused by mouth breathing

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14
Q

thumb-sucking/ finger sucking

A

Promotes development of Class 2 malocclusion

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15
Q

if palatal width is similar to intermolar width then….

A

then considered dental crossbit

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16
Q

but if palatal width is much narrower than intermolar

A

Skeletal crossbite

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17
Q

Anterior open bite

A

Failure of incisor teeth to overlap

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18
Q

posterior open bite

A

failure of posterior teeth to occlude, unilaterally or bilaterally
Etiologyy: anklylosis

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19
Q

Anterior deep Bite

A

Upper incisors overlap incisors excessively

Etiology : lack anterior contact, Deep Curve of Spee

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20
Q

Clonal model

A

model explaining how pattern of dentition is genetically determined before intiation of growth

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21
Q

Field theory

A

3morphologic fields- incisors, canines and premolars

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22
Q

neonatal teeth

A

teeth erupted during 1st month

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23
Q

pre-erupted teeth

Study These Flashcards
A

2nd or 3rd months

24
Q

when does decidious dentition begin growth

Study These Flashcards
A

during the 2nd month in utero

25
when do the successional teeth begin to grow and where
they will grow in a ectodermal patch lingual to the deciduous teeth
26
List when different teeth and when the successional lamina of each develops
1st permanent molar-begind 4 months in utero 2nd permanent molar: 1 yrs of age 3rd perm:4-5yrs old
27
Describe Clonal model
At very early stage of development, before initiation of tooth formation genes decide location of teeth
28
describe the pattern of the Mesiodistal gradient of teeth development
Different types of teeth are positioned predictably along the dental arch. Changes in this are rare less than 1% due to genetics
29
what is the Field Theory of teeth pattern
in ALL morphologic fields 1st tooth or key tooth is most stable-1st molar Most distal teeth in field are most variable EXCEPT! lower central incisors they vary more than laterals
30
Vestigial organ theory
states thats missing posterior teeth are part of evolution
31
anatomic model
the cause of misshaped lateral incisors is due to the union between Lateral Maxillaru=y and medial nasal process.
32
what is the E space
the difference between the medial distal with of the permanent 2nd pre molar and primary 2nd molar
33
Accessional teeth
No deciduous predecessor Molar Formation begins between 14wks in utero and 5 yrs
34
what are the nolla stages
Serial radiographs to evaluate dental development | 10 stages
35
what are the most important nolla stages
stage 2- Initial Calcification | stage 6- Crown completion
36
In Nolla's stage 9
occlussion is achieved although root is not completely formed . Root almost complete but apex is still open
37
what are the developmental processes during tooth eruption of successional teeth
``` 1st resorption of primary tooth elongation of permanent tooth root "increase in alveolar height movement of permanent tooth occlusally less growth in the inferior border of the mandible ```
38
what are the 3 phases of eruption in permanent dentition
eruption of 1st molars and incisors eruption of premolars,canines and 2nd molars eruption of 3rd molarss
39
what decides molar position
2nd decidious/primary molar
40
what factors influence anterior mandibular crowding
Size of teeth interdental spacing in the primary dentition length of the anterior perimeter of the arch
41
what features match the Ugly Duckling stafe
``` marked by a stage during the eruption of permanent dention with diastema physiologic space eruption on canines space closure. ```
42
alveolar process
are actively adaptable areas of bone growth
43
leeway space
difference in size between primary teeth and their successors anteriorly y& posteriorly
44
incisal liability
the difference btw space needed for incisors and amount of space available
45
where is primate space
distal to primary canine | result of distal tippin
46
late mesial shift causes what
inter molar width to decrease
47
Late mesial shift
happen to help teeth occupy space
48
the only cause of widening of mdibular basal bone a post natally
due to deposition on lateral borders of corpus... in small amount
49
ectopic eruption
erupts away from their normal position | most cpmmon 1st molar an canines
50
what are most common impacted teeth
3rd molars(usually palatal) and upper cuspid
51
impacted teeth erupt through
attached gingiva
52
oligodontia is
bilateral
53
Oligodontia
missing more than 6 teeth
54
anodotia
missing all
55
oligodontia is
bilateral
56
how do we classify supernumary teeth
1. teeth with conical crown - ectopic from max mid line 2. teeth of normal form and size 3. teeth with abnormal size an cuspal form

Orthodontics Exam1 (5 decks)

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