Development of an osteotomy surgery support system by geometric analysis of auditory-tactile fusion data

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01273
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Nakano Yutaka 東京工業大学, 工学院, 准教授 (70433068)
• Co-Investigator(Kenkyū-buntansha): 大井 一浩 金沢大学, 附属病院, 講師 (90451450)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 振動モニタリング / 時系列解析 / 顎変形症手術 / 骨切削

Outline of Final Research Achievements

In this study, we developed a system for safe osteotomy surgery by visualizing changes in the sensation felt in the hand just when a cutting tool reaches the cancellous bone in jaw deformity surgery in which the jaw bone is cut using the cutting tool. We proposed the evaluation index focusing on the peak value of the frequency spectral density of the handpiece vibration acceleration and the cutting sound taking into account the change in cutting force for judging the accession of the cutting bar at the cancellous bone. Osteotomy tests using an artificial bone and a pig mandible evaluated the accuracy of the proposed index. We found a high correlation between the time of peak spectral density and the time at which a skilled oral and maxillofacial surgeon determines the cancellous bone reaching. In addition, it was clarified a handpiece operation method which helps surgeon judge the cancellous bone reaching.

Free Research Field

機械力学・制御

Academic Significance and Societal Importance of the Research Achievements

機械特性が異なる2つの材料の境界を切削するときに起きる動力学的変化の要因を解明し，感覚の変化を定量的に評価する方法を提案した点に学術的意義があると考える．本研究で提案する判定システムを用いることで，より安全に手術を行える医療器具の開発，熟練医師と同等に切削工具の軟質層到達を判断するためのハンドピース操作方法を具体的・定量的に提示する教師データを明らかにすることで，後進の医師を育成する医療シミュレータの開発につながることが期待される．