Simulation model for endoscopically assisted fixation of the intraoral vertical subsigmoid ramus osteotomy

Abstract

Objective: To create a simulation model for endoscopically assisted fixation of the intraoral vertical subsigmoid ramus osteotomy for training purposes. Materials and Methods: A polyurethane model of the upper and lower jaws in prognathism with or without mandibular asymmetry was created and covered by stretchable rubber material to simulate the cheeks. Vertical subsigmoid ramus osteotomy was performed intraorally in the usual manner. A straight endoscope was used intraorally to monitor and assist in fixation of the segments through the transbuccal approach. Results: Both monocortical miniplate fixation and bicortical screw fixation of the vertical subsigmoid ramus osteotomy were feasible using the above model, and enabled satisfactory stability and control of the segments while achieving the planned movements. Conclusion: The simulation model is a useful tool for learning the procedure of endoscopically assisted rigid fixation of the vertical subsigmoid ramus osteotomy.