Abstract：Objective To explore the clinical effect of 3D printing in the treatment of adult developmental dysplasia of the hip(DDH) with total hip arthroplasty(THA).Methods From January，2013 to June，2016，20 patients were diagnosed as DDH in the First Affiliated Hospital of Kunming Medical University.There were 2 cases of Crowe Ⅰ，2 cases of Crowe Ⅱ，8 cases of Crowe Ⅲ，8 cases of Crowe Ⅳ.All patients underwent spiral CT scanning，and the hip 3D model were calculated to produce a large hip joint model with entity 1︰1.According to print out the corresponding hip model，we developed a suitable surgical program.The general condition，complications and the patient’s hip function (activity，pain VAS score，Harris Hip Score(HHS)) were recorded.Results 20 patients were diagnosed as DDH.The mean operative time was (75.25±20.42) min and the patient could stand and walk (2.90±0.72) d after operation.The average length of stay was (15.35±5.95)d.The mean HHS was (51.30±8.02) before the surgery and (86.50±5.85) at the last follow-up(P＜0.001).The VAS score was (5.51±1.19) before the surgery and (1.05±0.88) at last follow-up (P＜0.001).All patients were followed up with no complications such as joint infection，prosthetic loosening，fracture，prosthetic dislocation，sciatic nerve injury and other complications recorded.Conclusion 3D print technology was efficient in the treatment of hip dysplasia in patients，especially Crowe Ⅲ/ Ⅳ patients.
杨清，杨毅，杨柳，张正学，龚跃昆，杨佳，溪应龙，段于平，李彪. 3D打印技术用于人工全髋关节置换术治疗成人DDH的临床应用[J]. 实用骨科杂志, 2017, 23(8): 693-697.
Yang Qing，Yang Yi，Yang Liu，et al. Clinical Application of 3D Printing Technique in the Treatment of Developmental Dysplasia of the Hip in Total Hip Arthroplasty. sygkzz, 2017, 23(8): 693-697.
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