Abstract Complicated and large acetabular bone defects present the main challenges and difficulty in the revision of total hip arthroplasty (THA). This study aimed to explore the advantages of three-dimensional (3D) printing technology in the reconstruction of such acetabular bone defects. We retrospectively analyzed the prognosis of four severe bone defects around the acetabulum in three patients who were treated using 3D printing technology. Reconstruction of bone defect by conventional methods was difficult in these patients. In this endeavor, we used radiographic methods, related computer software such as Materialise's interactive medical image control system and Siemens NX software, and actual surgical experience to estimate defect volume, prosthesis stability, and installation accuracy, respectively. Moreover, a Harris hip score was obtained to evaluate limb function. It was found that bone defects could be adequately reconstructed using a 3D printing prosthesis, and its stability was reliable. The Harris hip score indicated a very good functional recovery in all three patients. In conclusion, 3D printing technology had a good therapeutic effect on both complex and large bone defects in the revision of THA. It was able to achieve good curative effects in patients with large bone defects.

中文翻译：

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3D 打印髋关节假体为具有复杂髋臼骨缺损的翻修全髋关节置换术提供准确的重建、稳定的固定和功能恢复

摘要 复杂且大的髋臼骨缺损是全髋关节置换术（total hip arthroplasty，THA）翻修的主要挑战和难点。本研究旨在探讨三维（3D）打印技术在此类髋臼骨缺损重建中的优势。我们回顾性分析了使用 3D 打印技术治疗的 3 名患者髋臼周围 4 处严重骨缺损的预后。在这些患者中，通过常规方法重建骨缺损是困难的。在这项工作中，我们使用放射照相方法、相关的计算机软件（如 Materialise 的交互式医学图像控制系统和西门子 NX 软件）和实际手术经验分别估计缺陷体积、假体稳定性和安装精度。而且，获得哈里斯髋关节评分以评估肢体功能。发现使用3D打印假体可以充分重建骨缺损，并且其稳定性可靠。Harris 髋关节评分表明所有三名患者的功能恢复都非常好。综上所述，3D打印技术对THA翻修中的复杂和大骨缺损均具有良好的治疗效果。对大骨缺损患者取得了良好的疗效。3D打印技术对THA翻修中的复杂和大骨缺损均有良好的治疗效果。对大骨缺损患者取得了良好的疗效。3D打印技术对THA翻修中的复杂和大骨缺损均有良好的治疗效果。对大骨缺损患者取得了良好的疗效。