Virtual Analysis of Segmental Bimaxillary Surgery: A Validation Study

PurposeThree-dimensional (3D) assessment of orthognathic surgery is often time consuming, relies on manual re-identification anatomical landmarks or limited to non-segmental osteotomies. The purpose the present study was propose and validate an automated approach for 3D accuracy postoperative outcome segmental bimaxillary surgery.MethodsA semi-automatic developed validated virtual surgical analysis (VSA) using a pair pre- (2 weeks) cone-beam computerized tomography (CBCT) scans. output VSA, outcome, calculated as translational rotational differences between planned movements individual bone segments. To evaluate reliability proposed intra-class correlation coefficients (ICC) were at 95% confidence interval measurements 2 observers. VSA deemed reliable if ICC excellent (> 0.80) absolute difference repeated intra- inter-observer significantly lower (p < 0.05) than hypothesized clinical relevant threshold 1 voxel (0.45 mm) degree, respectively.ResultsA total 10 subjects (6 male; 4 women; mean age 24.4 years) with skeletal class 3, who underwent surgery, 3-piece Le Fort I, bilateral sagittal split osteotomy genioplasty, recruited. excellent, range [0.96 - 1.00]. [0.07 mm (0.05) – 0.20 (0.19)] [0.11? (0.08) 0.63? (0.42)], respectively. This thresholds (P .001).ConclusionThe validation showed that has quantitative surgery. Three-dimensional A .001).