Orthodontics : 7/examination And Diagnosis / First Semester

Front 1

where can we obtain information ?

Back 1

1) patient question / interview
2) clincal examntion
3) evaluation of diagnostic records

Front 2

Extra-oral examination

Back 2

1) Frontal examnation :
- symmetry of the face releative to mid-facial axis
- nose , philtrum and chin

- face can be divided into three 1/3rds :
1) form hairline to supra-orbital ridge
2) from supra-orbital ridge ( S.T glabella ) to base of the nose ( UFH ) nearly 45%
3) from base of the nose to most inferior point on the chin ( menton ) LFH nearly 55%
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2) profile extra-oral examnation :
) skeletal examntion :

A) AP : profile analysis , skeletal classifcation ( class l , 2 or 3 )
B) vertical :
-LFH/TFH nearly 55%
-FMPA ( 27+- 5 ) between frankfort plane and lower border of the mandbile

Front 3

intra-oral examnaiton

Back 3

evaluation of teeth in occlusion in three plane :
1) vertical :
overbite : vertical overlap between upper and lower 12 :
- average : incial 1/3rd
-increassed > incisal 1/3rd
-decreassed < incisal 1/3rd
-complete , incomplete or tramua

2)Transverse :
-cross bite or scissor bite
-centerlines ( upper and lower should coincide with each other and with the mid-facial axis )

Front 4

Diagnostic records

Back 4

1) Photogrpahs :
A) extra oral ==> 4 photos :
1) at rest ( frontal )
2) smile
3) 3/4
4) profile

B) intra-orallly ===> 5 photos :
1)frontal
2)right buccal and left buccal
3) upper and lower occlusal
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2) dental casts with accurate wax-bite :
1) study models
2) working models

these casts are used to assess:
1) teeth in occlusion
2)arches releationship
3)symmetery of arch form
4) space analysis

Front 5

diagnosis

Back 5

based upon the examantion and assessment of the diagnostic records :

example :

Class ll divison 2 ... maloculsion on mild class 2 skeletal base with average vertical proption complicated by :
impcated UL3 , mild upper and lower arches crowding depp O.B and lower center line shift to R