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Understanding Predictability Error in Orthognathic Surgery

  • Edlyn RodriguesEmail author
  • Vikas Dhupar
  • Francis Akkara
Original Article
  • 1 Downloads

Abstract

Introduction

Orthognathic surgery aims to improve the facial aesthetics while maintaining stable jaw form and function. Lateral cephalometry provides objective data used in pre-op mock surgery to predict movement of the maxilla and mandible during orthognathic procedures.

Patient and Methods

A prospective cohort study was conducted on 30 adult orthognathic surgery patients. Mock jaw surgery predicted two-dimensional (horizontal and vertical) linear movement of maxilla and mandible. Operative procedures performed were bilateral sagittal split osteotomy and Le Fort I osteotomy. Seven-day pre-op cephalogram (T1) was compared to 7th day post-op cephalogram (T2) to assess hard tissue movement of point A (maxilla) and point B (mandible) using Cartesian (XY) plane.

Results

The difference between predicted values to the 7th day post-op outcome results was statistically insignificant (p value less than 0.001).

Conclusion

Planning in orthognathic surgery using digitized two-dimensional cephalometric tracings and mock jaw surgery produces predictable results.

Keywords

Predictability error Lateral cephalometry Bilateral sagittal split osteotomy Le Fort I osteotomy Bijaw surgery Hard tissue analysis 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interests.

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Copyright information

© The Association of Oral and Maxillofacial Surgeons of India 2019

Authors and Affiliations

  1. 1.Department of Oral and Maxillofacial SurgeryGoa Dental College and HospitalBambolimIndia

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