Understanding Predictability Error in Orthognathic Surgery
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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 (X–Y) plane.
The difference between predicted values to the 7th day post-op outcome results was statistically insignificant (p value less than 0.001).
Planning in orthognathic surgery using digitized two-dimensional cephalometric tracings and mock jaw surgery produces predictable results.
KeywordsPredictability error Lateral cephalometry Bilateral sagittal split osteotomy Le Fort I osteotomy Bijaw surgery Hard tissue analysis
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interests.
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