Aims: To quantify dentofacial deformity as defined by clinical examination and cephalometric meaurements. To compare those opting for surgical and conservative treatment. To identify parameters that significantly correlate with treatment choice.

Sample: A pilot study of 57 patients measured the following parameters: gender, racial, antero-posterior relationship, vertical relationship, transverse relationship, ANB, lip competence, overjet, overbite and crowding and identified the following variables as significant in progression to surgery:

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  Female

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  Clinically class II (AP)

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  Overjet >6 mm

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  Severe skeletal class II (ANB)

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  Severe skeletal class III (ANB)

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  Skeletal class III and AOB

This study will examine all patients (320) referred to the joint orthognathic clinic at Kings College Hospital between 2005 and 2012.