Computer-aided acetabular evaluating and operation designing before total hip arthroplasty for Crowe Ⅳ developmental dysplasia of the hip
10.3760/cma.j.issn.0253-2352.2012.05.011
- VernacularTitle:CroweⅣ型髋关节发育不良全髋关节置换术前计算机辅助设计
- Author:
Pengde KANG
;
Jing YANG
;
Bin SHEN
;
Zongke ZHOU
;
Yun ZHU
;
Fuxing PEI
- Publication Type:Journal Article
- Keywords:
Hip dislocation,congenital;
Computer-aided design;
Arthroplasty,replacement,hip
- From:
Chinese Journal of Orthopaedics
2012;32(5):442-446
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo explore the effect of computer-aided acetabular evaluating and operation designing before total hip arthroplasty (THA) for Crowe Ⅳ developmental dysplasia of the hip (DDH).MethodsFrom March 2011 to October 2011,10 patients (13 hips) diagnosed as DDH (Crowe Ⅳ) underwent THA.Before operation,all 10 patients underwent three dimensional (3D) CT scanning and the information was inputted into the Superlmage system to reconstitute the 3D anatomic models of pelvis and acetabulum.Then the position and size of the true acetabulum,the thickness of the anterior and posterior columns,and the degree of bone defect were evaluated or measured exactly with computer assisted design(CAD) software.After inputting the information of the test model of the acetabulum and material for repairing bone defect into the CAD software,the implantation of the acetabular prosthesis was simulated to determine the size and position of the acetabular prosthesis.Then the bone defect was evaluated after implantation of the acetabulum to perform simulation test of restoration of bone defect.Eventually,orthopedic surgery was performed precisely.ResultsThe size of acetabular prosthesis implanted in the operation was coincident with that got by preoperative computer aided technology in 9 patients(12 hips),and one acetabular prosthesis was larger than that designed preoperatively.All the cups were implanted in the anatomic acetabular location.The bone defect in the acetabular roof was reconstructed with tantalum augments in 4 hips,with Harris autograft using autologous femoral head in 7 hips,which were coincident with that designed preoperatively.ConclusionThe preoperative CAD is useful in THA for Crowe Ⅳ DDH,because it can exactly evaluate the developmental condition of the true acetabulum.
