Retrospective study of eligibility for orthognathic surgery using the Index of Orthognathic Functional Treatment Need (IOFTN)

To assess the functional needs of orthognathic patients who had been accepted for treatment by Christchurch Hospital, New Zealand, we made a retrospective assessment of 80 consecutive patients using the Index of Orthognathic Functional Treatment Need (IOFTN). Eligibility was based on the Severity and Outcome Index (SOI) score of ≤3 derived from seven lateral cephalometric measurements (three skeletal, three dental, and one soft tissue), which made allowances for asymmetrical or reported important functional issues.

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