Ming Cai1, Guofang Shen2, Andrew Hua-an Cheng3, Yanping Lin4, Dedong Yu1, Ming Ye4. 1. Department of Oral Craniomaxillofacial Science, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China. 2. Department of Oral Craniomaxillofacial Science, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China. Electronic address: maxillofacsurg@163.com. 3. Registrar, Oral and Maxillofacial Surgery Unit, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia. 4. School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai, People's Republic of China.
Abstract
PURPOSE: The purpose of the present study was to evaluate the accuracy of navigation-assisted distraction osteogenesis of the mandible in a goat model. MATERIALS AND METHODS: Six adult goats were included in the present study. A 3-dimensional (3D) image was reconstructed by performing computed tomography (CT) scans in 0.625-mm slices after placement of 5 maxillary marking screws and intermaxillary fixation with a prefabricated occlusal splint using the TBNavis-CMFS navigation system (Multifunctional Surgical Navigation System, Shanghai, China). Simulation distraction was performed to lengthen a unilateral mandibular body by 10 mm. Image-guided distraction osteogenesis was performed on the goat hemimandibles according to the preoperative planning. 3D skeletal measurements from the simulation were compared with those taken from the CT scans at 3 months postoperatively. RESULTS: Navigation-assisted distraction osteogenesis was successfully performed in all 6 goat hemimandibles. The accuracy of the intraoperative registration was within 1 mm. The hemimandible was lengthened a mean of 10.02 mm (range 9.89 to 10.12). No significant differences were found between the simulation distraction and postoperative 3D measurements (P > .05). CONCLUSIONS: Navigation-assisted distraction osteogenesis of the mandible in the goat model can be performed with high accuracy using the TBNavis-CMFS navigation system.
PURPOSE: The purpose of the present study was to evaluate the accuracy of navigation-assisted distraction osteogenesis of the mandible in a goat model. MATERIALS AND METHODS: Six adult goats were included in the present study. A 3-dimensional (3D) image was reconstructed by performing computed tomography (CT) scans in 0.625-mm slices after placement of 5 maxillary marking screws and intermaxillary fixation with a prefabricated occlusal splint using the TBNavis-CMFS navigation system (Multifunctional Surgical Navigation System, Shanghai, China). Simulation distraction was performed to lengthen a unilateral mandibular body by 10 mm. Image-guided distraction osteogenesis was performed on the goat hemimandibles according to the preoperative planning. 3D skeletal measurements from the simulation were compared with those taken from the CT scans at 3 months postoperatively. RESULTS: Navigation-assisted distraction osteogenesis was successfully performed in all 6 goat hemimandibles. The accuracy of the intraoperative registration was within 1 mm. The hemimandible was lengthened a mean of 10.02 mm (range 9.89 to 10.12). No significant differences were found between the simulation distraction and postoperative 3D measurements (P > .05). CONCLUSIONS: Navigation-assisted distraction osteogenesis of the mandible in the goat model can be performed with high accuracy using the TBNavis-CMFS navigation system.