CASE REPORT article
Front. Surg.
Sec. Orthopedic Surgery
Volume 12 - 2025 | doi: 10.3389/fsurg.2025.1655804
Double trabecular metal cup without auxiliary screws for severe acetabular bone defects
Provisionally accepted- First Affiliated Hospital of Jilin University, Changchun, China
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Background: Acetabular reconstruction is often challenging in revision hip arthroplasty, especially in the face of moderate to severe acetabular bone deficiency. In some severe bone defects, doublemetal tantalum cups can improve the contact area between bone and implants, increase the surface area for bone ingrowth, and better restore the anatomical position of the acetabulum. Furthermore, with a good press fit, the auxiliary screw has a minimal effect on acetabular cup stability.We report a case of a 63-year-old male patient who was diagnosed with loosening prosthesis after total hip arthroplasty and whose preoperative radiograph suggested a large bone defect in the acetabulum. Due to the large amount of purulent fluid found in the joint cavity during the first revision surgery, a decision was made to stage-one spacer placement followed by a second-stage revision. In the second-stage revision, we utilized a double-cup technique to fill the large acetabular bone defect.In the revision total hip arthroplasty, if the acetabular bone defect is severe, a double metal-tantalum cup structure can be used to reconstruct the acetabular structure, restore the center of rotation of the hip joint. Under good press-fit conditions, the metal-tantalum cup can obtain initial stability of sufficient strength even without screw fixation, and achieve secondary stability through bone growth.
Keywords: Acetabular bone defects, Revision total hip arthroplasty, Double-cup technique, Screw fixation, case repoort
Received: 28 Jun 2025; Accepted: 04 Aug 2025.
Copyright: © 2025 Xia, Li, Zhu, Sun and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Dongsong Li, First Affiliated Hospital of Jilin University, Changchun, China
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