A Novel Training Alternative in Orthognathic Mandibular Osteotomy: Air Dried Clay Model

Abstract

Objective: Patient safety and low complication rates are indispensa ble in surgical training and models are among the main educational tools. The aim of this study is to assess the efficiency of a novel model for orthognathic mandibular osteotomy.Material and Methods: A template and seventeen partial mandibular models (MM-17) were manufactured with air dried clay. The dimensions of the models were feasible for sagittal split ramus osteotomy (SSRO). Model surgery was performed by surgeons with a minimum of three years’ experience in orthognathic surgery. Each surgeon operated four separate models and the following data were recorded: corticotomy and SSRO completion time, MM-17 fracture type, similarity value of MM-17 with native mandible, representation value of MM-17, and the training compatibility value of MM-17.Results: IThe cost was 0.6 American Dollars. The mean corticotomy time was 126.75 seconds (110-150). Mean cortical resistance similarity value was 8.75 (8-10). The mean SSRO time was 288 seconds (205-401). Sixty percent of the fractures were seen in the outer cortex. The mean medullary resistance similarity value was 5 (4-6) and mean mandibular representation value was 5.25 (4-7). The training compatibility value was 8.25 (7-10).