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Abstract

Purpose: The application of 3D virtual planning has been playing an increasingly important role in complicated craniomaxillofacial surgery. It remains a challenge, however, how to precisely transfer the virtual planning to the actual clinical outcome. Cone-beam CT scan, Simplant O&O virtual plan system with 3D printed splints were applied to the patients in our center with dentofacial deformities. This study is to evaluate the accuracy of the virtual plan system and the reliability of the clinical outcomes. Material and Method: Five patients with severe skeletal discrepancies between the upper and lower jaws were included in the study. All of them received double jaw surgeries. The actual post-operative digital CT models were super-imposed with the virtual planned CT models and the discrepancy between those two models was measured. The criteria of accuracy used by most studied were set at distance discrepancy less than 2.0 mm and angulation discrepancy less than 4 degrees. Outcome: The average distance difference between the planned and actual outcomes were less than 2.0 mm. The occlusal plane angle discrepancy between the planned and actual outcomes were less than 1.5 degrees, which was far less than the success criteria-4.0 degree. Conclusion: In this preliminary study, it can be concluded that virtual planned models using Cone-beam CT and Simplant O&O planning system can be accurately transferred to the actual surgical outcomes.

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