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Evaluation of the Accuracy of Virtual Planning in Orthognathic Surgery: A Morphometric Study
Emanuele Zavattero1, Michele Romano1, Giovanni Gerbino1
1Division of Maxillofacial Surgery, Fondazione IRCCS Ca' Granda, Policlinico Hospital Milano Department of Biomedical, Dental sciences University of Milano, Italy.
Background:
The purpose of this study was to prospectively test the accuracy of computer-aided orthognathic surgery comparing the virtual surgical planning with the three-dimensional (3D) outcome.
Methods:
Patients that underwent computer-assisted orthognathic surgery were retrospectively evaluated. The postoperative results were compared with the surgical plan, superimposing the postoperative computed tomography (CT) scan onto the virtual plan. Surface-based superimpositioning of the postoperative CT scan onto the 3D preoperative plan was carried out to visualize the discrepancy between preoperative virtual plan and postoperative 3D CT result.
Results:
A total of 17 consecutive patients that underwent two-jaw computer-assisted orthognathic surgery were enrolled in the study.The average linear differences for selected points were <1 mm in 12 patients out of 17. In 5 patients out of 17, the average differences for selected points were <2 mm.
Conclusions:
An overall high degree of accuracy between the virtual plan and the postoperative result was found.
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