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BDS4 Orthodontics > Orthodontic Assessment > Flashcards

Orthodontic Assessment Flashcards

1
Q

What are the aims of orthodontic tx?

A

Functional
Stable
Aesthetic occlusion

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2
Q

What are the risks of orthodontic tx?

A

Relapse
Root resorption
Decalcification

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3
Q

What are the main headings we assess in ortho assessment?

A

CO

HPC

MH

SH, FH, DH

Extra Oral:
A/P
FMPA
Transverse - Asymmetry?
LAFH
Lips - competent, incompetent, lip trap
Naso-labial angle
Smile line

Intra-oral:
Teeth present
Teeth absent
Quality/prognosis of teeth
Incisor relationship
Molar relationship
OJ
OB
BPE
OH status
Centre lines
Crossbite
Canine relationship
Lower arch - crowding
Upper arch - crowding
Inclination of incisors

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4
Q

What is the A/P relationship?

A

This s where we palpate the skeletal bases or assess visually - soft tissue point A and soft tissue point B

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5
Q

What is A/P Class I skeletal base relatiobship?

A

Soft tissue A 2-3mm infront of soft tissue B

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6
Q

What is A/P Class II skeletal base relatiobship?

A

Soft tissue A >2-3mm infront of soft tissue B

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7
Q

What is A/P Class III skeletal base relatiobship?

A

Soft tissue A <2-3mm infront of B (B sometimes infront of A)

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8
Q

How do we work out the FMPA??

A

Frankfort plane and mandibular plane and draw both lines and see where the join in relation to the occipit

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9
Q

What is the frakfrot plane?

A

Lower border of orbital rim –> external auditory meatus

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10
Q

What is the mandibular plane?

A

Lower border of mandible

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11
Q

What is an average FMPA?

A

This Is when Frankfort plane and mandibular plane meet AT the occipit

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12
Q

What is increased FMPA?

A

This is when Frankfort plane and mandibular plane meet ANTERIOR to the occipit

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13
Q

What is reduced FMMPA?

A

This is where Frankfort plane and mandibular plane meet POSTERIOR to the occipit

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14
Q

What is LAFH?

A

This is from the sub nasale to mention

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15
Q

How do we assess face height?

A

LAFH : TAFH

should be 50::50 when assessing clinically

GLABELLA –> SUB NASALE –> MENTON

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16
Q

How do we assess pts symmetry?

A

Look face on
look from above down to chin

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17
Q

What do we assess in terms of the lip?

A

Competent or not

18
Q

What is competent lips?

A

This is when mentalis muscle is relaxed the lips join

19
Q

What is incompetent lips?

A

This is when mentalis is relaxed the lips dont touch - trauma risk as teeth exposed

20
Q

What is a lip trap?

A

This is when the lower lip gets behind the upper teeth and upper incisors rest on or are infrotn of the lip - this has high relapse risk unless we get lower lip sitting infrotn of teeth

21
Q

What is the Naso-labial angle?

A

Average
Inc
Red

22
Q

What is the smile line assessment?

A

High
Normal
Low

23
Q

What do we assess intra-orally?

A

Teeth present
Missing teeth
OH assessment
BPE
Poor prognosis teeth
Tooth quality

24
Q

What do we assess in each arch?

A

Crowding - mild moderate, severe
crowding/aligned/spaced

25
Q

What is classes as MILD, MOD and SEVERE CROWDING?

A

Mild <4mm
Moder 4-8mm
Severe >8mm

26
Q

What is the inclinations of the incisors?

A

Proclined
average
retroclined

27
Q

What are the incisor relationships?

A

Class I
Class II Div I
Class II Div II

28
Q

What is class I incisor relationship?

A

This is where the lower incisor edge occludes with or lies directly on cingulum plateau of the upper incisors

29
Q

What is class II Div I incisor relationship?

A

This is where the lower incisor edge occludes POSTERIOR to the cingulum plateau of the upper incisors
The incisors can be proclined or of normal inclination and there can be an increased OJ

30
Q

What is Class II Div I relationship?

A

This is where the lower incisor edge occludes POSTERIOR cingulum plateau of the upper incisors
This is where upper incisors are retroclined

31
Q

What is class III incisor relationship?

A

This is where lower incisor edge occludes ANTERIOR to cingulum plateau of upper incisors

OJ CAN BE REDUCED OR REVERSED

32
Q

What is OJ?

A

This is the horizontal relationship of maxillary incisor to mandibular incisors
Measure it in mm

33
Q

What is OB?

A

Vertical relationshio

can be

reduced
average
increased

can be incomplete, complete (with tooth contact or palate contact) or traumatic

34
Q

What is a class I molar relationship?

A

Upper 6 MB cusp occludes with buccal groove of lower 6

35
Q

What is class II 50% molars?

A

This is where upper 6 MB cusp moves a Half unit mesially so upper 6 and lower 6 lie on top of each other

36
Q

What is class II 100% full unit molars?

A

This is where upper 6 MB cusp occludes anterior to the buccal groove of lower 6 - occludes onto the 5

37
Q

What is a class III molar relationship?

A

This is where upper 6 MB cause occludes posterior to the buccal groove of lower 6

38
Q

What is a class I canine relationship?

A

This is where upper canine occludes distal to lower canine

39
Q

What is class II canine relationship?

A

This is where upper canine occludes mesial to lower canine

40
Q

What is class III canine relationship?

A

This is where upper canine occludes very distal to the lower canine

BDS4 Orthodontics (6 decks)

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