Current status of surgical planning and transfer methods in orthognathic surgery.

Since the advent of orthognathic surgery major efforts have been made to render these surgical procedures more reliable, accurate, reproducible, and shorter. Such improvements imply the enhancement of surgical planning (SP) techniques and optimization of SP transfer tools. Most widespread current SP methods are based on physical examination/anthropometric measurements combined with cephalometric analysis. Most surgeons currently use handmade acrylic surgical splints or sometimes freehand surgery as transfer tool. The emergence of virtual surgical planning (VSP) procedures gave birth to several modern transfer tools, such as computer-assisted design and manufactured (CAD/CAM) splints, CAD/CAM splints with extra-oral bone support, customized miniplates, and surgical navigation. This article classifies and describes these emerging transfer tools, therewith underlining their advantages and drawbacks.