Work

Case Report: Double trabecular metal cup without auxiliary screws for severe acetabular bone defects

Year: 2025

Type: article

Abstract: 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, double-metal 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. Case presentation: 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-1spacer 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. Conclusions: 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.

Source: Frontiers in Surgery

DOI: 10.3389/fsurg.2025.1655804

Authors: Ming Xia, Dongbo Li, Chunquan Zhu, Lihui Sun, Dongsong Li

Institution: First Hospital of Jilin University

Language: English

Topic: Orthopaedic implants and arthroplasty

Subfield: Surgery

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $3,801