Support for jaw deformity surgery by vibration monitoring of rotating cutting tool

Abstract

In the treatment of dentofacial deformities in oral and maxillofacial surgery, a maxilla-mandibular bone is cut using a rotary cutting tool. Generally, an oral and maxillofacial surgeon determines the end of cutting with a cutting bar by sensory change transmitted from the cortical bone(hard layer) to the cancellous bone (soft layer) in the hand of the surgeon. It is required the extensive experience and advanced surgical skills to avoid a risk of sequelae due to excessive damage to blood vessels and nerves caused by excessive cut. Therefore, it is important to establish an objective and quantitative index for the cancellous bone reaching in order to perform the procedure safely. The purpose of this study is to construct an evaluation index for judging the accession of the cutting bar at the cancellous bone. This study focuses on the density of the frequency spectral component of the vibration acceleration of the handpiece and defines the change in the density of the spectral component as a new evaluation index. The accuracy of the proposed evaluation index was evaluated by the artificial bone cutting tests simulating the oral and maxillofacial surgery. In addition, the effects of proficiency in the surgery on the judgment results were examined.

Keywords

• vibration monitoring
• dentofacial deformity surgery
• fourier transform
• data processing
• cutting process