目的：评价计算机辅助技术和快速成型技术在儿童发育性髋关节脱位诊断与治疗中的疗效。方法：对14例发育性髋关节脱位患儿行CT扫描获取病变部位的二维数据，采用计算机辅助技术行DDH骨盆的三维重建解剖学模型，快速成型制作出骨盆模型。依此对发育性髋关节脱位做出明确诊断，制定手术方案，术前模拟手术，指导手术治疗。结果：术中所见与虚拟三维重建图像及快速成型骨盆模型非常相似，术前的模拟手术使手术时间明显缩短，减少了术中失血，14例患儿均获得了良好矫正。结论：计算机辅助快速成型技术能够准确和直观地反映儿童发育性髋关节脱位骨盆畸形的立体形态和各部位解剖结构的空间关系，可指导制定手术计划和手术操作。%Objective:To evaluate the value of computer aided technology in diagnosis and treatment of DDH in children. Methods:Fourteen patients of DDH were examined by lamellar CT to gain two-dimensional data of diseased region. Three-dimensional reconstructions of anatomical models were accomplished by computer aided technology. The pelvic models were manufactured by rapid prototyping, which operation project were formulated, preoperative sham operated were enforced and supervise the operation of pelvic fracture. Results:Three-dimensional reconstruction images and RP pelvic models were extremely similar to that doctor can see in operation. Preoperative sham operation shortened the time of operation and reduced the volume of bleeding of operation. The actual angles corresponded almost exactly to the planned corrective angles in 14 cases. Conclusions: Digital reconstruction and rapid prototyping can reveal overall, direct-viewing, exactly display three-dimensional shape of complicated deformities, which can be used for making a surgical plan in DDH.
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