Total hip arthroplasty using a three-dimensional porous titanium acetabular cup: an examination of micromotion using subject-specific finite element analysis

Abstract Background We investigated the mid-term clinical and radiological results of total hip arthroplasty (THA) using a three-dimensional (3D) porous titanium cup analyzed micromotion at interface subject-specific finite element (FE) analysis. Methods evaluated 73 hips 65 patients (6 men 59 women; mean age time surgery, 62.2 years; range, 45–86 years) who had undergone THA 3D cup. Clinical evaluations were performed Japanese Orthopaedic Association (JOA) score system. assessed fixation acetabular component based on presence radiolucent lines migration anteroposterior radiographs. Subject-specific FE models constructed from computed tomography data. Results The JOA improved preoperative 52.2 (range, 23–82) to 87.8 71–100) final follow-up. None underwent revisions during follow-up period. Radiolucent observed in 26 cases (35.6%) frequently appeared DeLee Charnley Zone 3. Following analysis, 3 was significantly larger than that 2. Furthermore, large groups which Conclusions outcome excellent. However, analysis indicated same site, strongly suggesting it contributes emergence lines. cups are useful THA, with improvements focused micromotion, we anticipate better long-term outcomes.