Objective:To measure the morphologic data of Chinese temporomandibular joint (TMJ) with computed tomography (CT) reconstruction technology,and to clarify the safe area for the fixation of Chinese temporomandibular joint prosthesis.Methods:A total of 100 adult skulls were scanned by CT and reconstructed.The width,thickness and angle h1,h2,h3,h4,d1,d2,d3,d4,ab,bc,cd,ad,α and β of zygomatic arch,the width and height BD and h of articular fossa and the width,thickness and angle S,h5,h6,h7,l1,l2,l3,l4,l5,m1,m2,m3,m4,m5 and γ of mandible in the fixed area of the TMJ prosthesis were measured;all the measurement indexes were divided into left and right groups by direction,and SPSS 19.0 software was used for the comparion of the measurement between left and right groups.Results:There were no statistical differences in the measurement index values of h1,h2,h3,h4,d1,d2,d3,d4,ab,bc,cd,ad,α,β,BD,h,S,h5,h6,h7,l1,l2,l3,l4,l5,m1,m2,m3,m4,m5 and γ in zygomatic arch,articular fossa and mandible in the fixed area of the TMJ prosthesis between left and right groups (P＞0.05);the width of h2 was longer than that of h3 in zygomatic arch (P=0.048);the thickness of d3 was thicker than that of d4 (P＜0.01).Conclusion:The measurement data of TMJ fixed area is obtained with three-dimensional CT images.%目的:采用计算机断层扫描(CT)重建技术测量国人颞下颌关节(TMJ),阐明国人TMJ假体的安全固定区域.方法:对100例成年人头部进行CT扫描和三维重建,测量双侧TMJ假体固定区域中颧弓部分的宽度、厚度和角度h1、h2、h3、h4、d1、d2、d3、d4、ab、bc、cd、ad、α和p;关节窝部分的宽度和高度BD和h;下颌支部分的宽度、厚度和角度S、h5、h6、h7、l1、l2、l3、l4、l5、m1、m2、m3、m4、m5和γ.所有测量指标依据方向分为左右侧2组,采用SPSS 19.0软件比较左右侧2组测量指标的差异.结果:测得TMJ颧弓、关节窝和下颌支假体固定区域部分的测量指标h1、h2、h3、h4、d1、d2、d3、d4、ab、bc、cd、ad、α、β、BD、h、S、h5、h6、h7、l1、l2、l3、l4、l5、m1、m2、m3、m4、m5和γ的数据,左右侧2组各指标测量值比较差异均无统计学意义(P＞0.05);颧弓部分h2的宽度大于h3 (P=0.048),d3的宽度大于d4 (P＜0.01).结论:采用CT三维图像得到了国人TMJ假体安全固定区域的测量数据.
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