Ming Zhu1, Fei Liu2, Chaozheng Zhou3, Li Lin3, Yan Zhang2, Gang Chai4, Le Xie3, Fazhi Qi5, Qingfeng Li2. 1. Department of Plastic and Reconstructive Surgery, Zhongshan Hospital, Fudan University, No. 180 Feng Lin Road, Shanghai, 200032, China. 2. Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital affiliated to Medical School of Shanghai Jiao Tong University, No. 639 Zhi Zao Ju Road, Shanghai, 200011, China. 3. National Digital Manufacturing Technology Center, Institute of Forming Technology and Equipment affiliated to Shanghai Jiao Tong University, No.1954 Huashan Road, Shanghai, 200030, China. 4. Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital affiliated to Medical School of Shanghai Jiao Tong University, No. 639 Zhi Zao Ju Road, Shanghai, 200011, China. Electronic address: 13918218178@163.com. 5. Department of Plastic and Reconstructive Surgery, Zhongshan Hospital, Fudan University, No. 180 Feng Lin Road, Shanghai, 200032, China. Electronic address: Qi.fazhi@zs-hospital.sh.cn.
Abstract
BACKGROUND: Augmented reality (AR)-based navigation surgery has evolved to be an advanced assisted technology. The aim of this study is to manifest the accuracy of AR navigation for the intraoperative mandibular angle osteotomy by comparing the navigation with other interventional techniques. METHODS: A retrospective study was conducted with 93 post-surgical patients with mandibular angle hypertrophy admitted at our plastic and reconstructive surgery department between September 2011 and June 2016. Thirty-one patients received osteotomy conducted using a navigation system based on augmented reality (AR group), 28 patients received osteotomy conducted using individualised templates (IT group) and the remaining 34 patients received osteotomy performed by free hand (free-hand group). The post-operative computed tomography (CT) images were reviewed and analysed by comparing with pre-surgical planning generated by three-dimensional (3D) software. The preparation time, cutting time, whole operating time and discrepancy in osteotomy lines were measured. RESULTS: The preparation time was much shorter for the free-hand group than that for the AR group and the IT group (P < 0.01). However, no significant difference in the whole operating time was observed among the three groups (P > 0.05). In addition, the discrepancy in osteotomy lines was lower for the AR group and in the IT group than for the free-hand group (P < 0.01). CONCLUSION: The navigation system based on AR has a higher accuracy, more reliability and better user friendliness for some particular clinical procedures than for other techniques, which has a promising clinical prospect.
BACKGROUND: Augmented reality (AR)-based navigation surgery has evolved to be an advanced assisted technology. The aim of this study is to manifest the accuracy of AR navigation for the intraoperative mandibular angle osteotomy by comparing the navigation with other interventional techniques. METHODS: A retrospective study was conducted with 93 post-surgical patients with mandibular angle hypertrophy admitted at our plastic and reconstructive surgery department between September 2011 and June 2016. Thirty-one patients received osteotomy conducted using a navigation system based on augmented reality (AR group), 28 patients received osteotomy conducted using individualised templates (IT group) and the remaining 34 patients received osteotomy performed by free hand (free-hand group). The post-operative computed tomography (CT) images were reviewed and analysed by comparing with pre-surgical planning generated by three-dimensional (3D) software. The preparation time, cutting time, whole operating time and discrepancy in osteotomy lines were measured. RESULTS: The preparation time was much shorter for the free-hand group than that for the AR group and the IT group (P < 0.01). However, no significant difference in the whole operating time was observed among the three groups (P > 0.05). In addition, the discrepancy in osteotomy lines was lower for the AR group and in the IT group than for the free-hand group (P < 0.01). CONCLUSION: The navigation system based on AR has a higher accuracy, more reliability and better user friendliness for some particular clinical procedures than for other techniques, which has a promising clinical prospect.