Development of orthognathic surgery assisted system with combined guide modeling technology and intraoperative holography.

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K17123
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57060:Surgical dentistry-related
• Research Institution: Tokyo Dental College
• Principal Investigator: koyachi masahide 東京歯科大学, 歯学部, 助教 (90875692)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: extended reality / virtual reality / mixed reality / orthognathic surgery / image guided surgery / CAD/CAM

Outline of Final Research Achievements

In Le Fort I osteotomy, a type of surgery for jaw deformity, CAD/CAM technology is used as a method to reproduce preoperative virtual operations during surgery. However, it was difficult to confirm during surgery whether the surgery was being performed as planned. Therefore, we developed a method to perform surgery while wearing a head-mounted display equipped with mixed reality technology during surgery and superimposing a 3D hologram created from the preoperative virtual operations onto the surgical field. As a result, the reproducibility and accuracy of the preoperative plan when moving the maxilla was improved, and it was suggested that this could become a universal surgical procedure regardless of years of experience.

Free Research Field

Oral and Maxillofacial Surgery

Academic Significance and Societal Importance of the Research Achievements

Le Fort I 型骨切り術による上顎骨移動・固定には、術前に印象採得した模型を用い作製するダブルスプリント法が用いられているが、作製過程における誤差が生じることに加え3次元的変化を十分に再現出来ず、術者の経験に依存している点が大きい。本研究の成果により、施設や経験年数に依存しない普遍的で高精度な手術が行えるようになった。さらに本技術は口腔外科領域のその他の手術にも応用することが可能であり、様々な手術を安全かつ高精度に行えることが期待できる。