Materials and Devices Needed For Preoperative Planning and Simulation
The osteotomies performed in orthognathic surgery are classically planned on cast models of the tooth-bearing jaws, fixed in an articulator. For edentulous patients, the surgical planning is made by using stereolithographic models. These tridimensional models are then cut along the planned osteothomy line, slid and fixed in the new position. Since the 1990s, modern techniques of presurgical planning were developed – allowing the surgeon to plan and simulate the osteotomy in a virtual environment, based on a preoperative CT or MRI; this procedure reduces the costs and the duration of creating, positioning, cutting, repositioning and refixing the cast models for each patient. The first system that allowed such a surgical simulation environment is the Laboratory Unit for Computer Assisted Surgery (LUCAS), that was developed in 1998 at the University of Regensburg, Germany, with the support of the Carl Zeiss Company.
Read more about this topic: Bone Segment Navigation
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