A New Computer Assisted Orthopaedic Surgery System:WATO  

作　　者：ZHAO Zi-jian LIU Yun-cai 

机构地区：[1]School of Control and Engineering,Shandong University [2]Institute of Image Processing and Pattern Recognition,Shanghai Jiao Tong University

出　　处：《Chinese Journal of Biomedical Engineering(English Edition)》2013年第4期139-147,共9页中国生物医学工程学报（英文版）

摘　　要：Background:The traditional manual orthopaedic technology heavily relies on a surgeon's experience,so it certainly increases the instability of the surgery.Therefore,computer assisted orthopaedic surgery(CAOS) is becoming a hot research topic for its high accuracy and stability.We developed a new CAOS system WATO,which is mainly designed for total knee replacement(TKR).Methods:WATO system provides the interactive software for a surgeon's preoperative planning.Based on its two infrared cameras,infrared markers and infrared probe,WATO system gives a simple surgical positioning procedure of femur and tibia without additional surgery for the placement of fiducial markers.According to the reference alignment axis from positioning procedure,a surgeon can move the robot of WATO system to do accurate bone resection.Safety checking is also considered in WATO system.Results:Extensive experiments were conducted on phantoms and cadaver bones to verify the accuracy and stability of WATO system.Experimental results showed that TKR using WATO system had better performance compared with traditional and navigated TKR.Conclusion:WATO system shows its superiority in TKR,and has a broad application prospect in the future.We will develop its new functions for other orthopaedic surgery such as total hip replacement(THR).Current disadvantages such as bigger skin incision have to be resolved in the future.Background： The traditional manual orthopaedic technology heavily re- lies on a surgeon＇s experience, so it certainly increases the instability of the surgery. Therefore, computer assisted orthopaedic surgery （CAOS） is becoming a hot research topic for its high accuracy and stability. We developed a new CAOS system WATO, which is mainly designed for total knee replacement （TKR）. Methods： WATO system provides the interactive software for a surgeon＇s preoperative planning. Based on its two infrared cameras, infrared markers and infrared probe, WATO system gives a simple surgical positioning procedure of femur and tibia without additional surgery for the placement of fiducial markers. According to the reference alignment axis from positioning procedure, a surgeon can move the robot of WATO system to do accurate bone resection. Safety checking is also considered in WATO system. Results： Extensive experiments were conducted on phantoms and cadaver bones to verify the accuracy and stability of WATO system. Experimental results showed that TKR using WATO system had better performance compared with traditional and navigated TKR. Conclusion： WATO system shows its superiority in TKR, and has a broad application prospect in the future. We will develop its new functions for other orthopaedic surgery such as total hip replacement （THR）. Current disadvantages such as bigger skin incision have to be resolved in the future.

关 键 词：computer assisted orthopaedic surgery （CAOS） NAVIGATION ROBOTIC total knee replacement （TKR） visual servo  tibiofemoral alignment 

分 类 号：R[医药卫生]