Recently, advances in three-dimensional (3D) imaging have led to a breakthrough in the diagnosis, treatment planning and result assessment in orthognathic surgery. Today, 3D planning of orthognathic surgery is already widely applied, particularly for the treatment of patients with asymmetrical deformity. However, the exact transfer of virtual 3D planning into the operative site remains challenging. Correct positioning of the maxilla after Le Fort I osteotomy in the transverse and sagittal plane is usually guided by an intermediate splint, and the vertical dimension is generally measured using intraoral or extraoral reference points. However, these traditional positioning devices and intraoperative splints are failure-prone and time-consuming steps, which might lead to inaccurate positioning of the maxilla. Here, laser-melted patient-specific implants (PSI) as positioning guides and concurrently as rigid fixation of the maxilla provide a time-sparing and failsafe technique without the use of occlusal splints. Furthermore, the use of patient-specific drilling and cutting guides facilitate an exact transfer of planned osteotomy lines into the operating theater.
This Webinar gives an overview of current applications of patient-specific implants in orthognathic surgery for repositioning the maxilla, the mandible and the chin.