Shen Pei, Zhang ShanYong, Yang Chi, Huang Dong
Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
J Craniomaxillofac Surg. 2014 Apr;42(3):201-5. doi: 10.1016/j.jcms.2013.04.012. Epub 2013 Jun 6.
To evaluate the mandibular symmetry effect of temporomandibular joint (TMJ) replacement by surgicase5.0 software.
Six developing sheep were included in our study. Spiral computed tomography (CT) data of all sheep was obtained and transformed into 3-dimensional model by surgicase5.0 software preoperatively. 3-dimensional resin skull models were obtained and total TMJ prostheses were made. The right sides of all sheep were carried out operation based on preoperative planning as the experimental group, while the left sides were as the control group. CT scanning was performed one, four and twelve weeks after operation. Ramus heights (RH), mandibularbody length (ML), condyle-incisor (CI) and supramental-condyle (BC) of both experimental and control group were measured to be compared by Wilcoxon Signed Rank. Meanwhile those measurements were also compared with preoperative counterpart by Wilcoxon Signed Rank respectively.
All animals were alive to the end of this experiment with normal eating. There were significant differences for RH, CI, BC between the experimental and control group after twelve weeks. The comparison before and after operation on experimental group showed that there was significant difference on ML, CI and BC after four and twelve weeks. The comparison on control group showed that there was significant difference on ML, CI, BC after four weeks and RH, ML, CI, BC after twelve weeks.
In conclusion, we deduce that sheep carried out by custom-made TMJ prosthesis can eat well. However the long term results of total TMJ replacement on developing sheep may not be very good.
运用Surgicase5.0软件评估颞下颌关节置换对下颌对称性的影响。
本研究纳入6只发育中的绵羊。术前获取所有绵羊的螺旋计算机断层扫描（CT）数据，并通过Surgicase5.0软件将其转化为三维模型。制作三维树脂颅骨模型并制造全颞下颌关节假体。所有绵羊的右侧根据术前规划进行手术作为实验组，左侧作为对照组。术后1周、4周和12周进行CT扫描。测量实验组和对照组的升支高度（RH）、下颌体长（ML）、髁突-切牙距（CI）和颏下-髁突距（BC），采用Wilcoxon符号秩检验进行比较。同时，这些测量值也分别与术前对应值进行Wilcoxon符号秩检验比较。
所有动物均存活至实验结束，进食正常。12周后，实验组与对照组在RH、CI、BC方面存在显著差异。实验组手术前后比较显示，4周和12周后ML、CI和BC有显著差异。对照组比较显示，4周后ML、CI、BC有显著差异，12周后RH、ML、CI、BC有显著差异。
总之，我们推断定制颞下颌关节假体的绵羊进食良好。然而，发育中绵羊全颞下颌关节置换的长期效果可能不太理想。
