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Aim and Background <p>Revision total hip arthroplasty (rTHA) is a technically demanding procedure, particularly when the femoral stem is well-fixed. Removal of a stable stem increases operative time, morbidity, and risk of complications. The BioBall modular head–neck adapter system allows intraoperative restoration of leg length, offset, and version without stem removal. This study evaluates the mid-term clinical and radiological outcomes of the BioBall system in revision THA.</p> Methods <p>A retrospective, single-center observational case series was conducted including all rTHAs performed at Wrightington, Wigan and Leigh NHS Foundation Trust between January 2015 and August 2024 using the BioBall adapter system. Inclusion criteria were revision THA using the BioBall system with complete follow-up data. Demographic, clinical, and radiographic parameters were analyzed. The study had co-primary endpoints: (1) implant survival (defined as absence of re-revision) and (2) functional outcome measured using the Oxford Hip Score (OHS). Secondary endpoints included radiological stability and postoperative complications. Analyses were descriptive in nature.</p> Results <p>Fifty revisions in forty-six patients (mean age 73.5 ± 10.4&#xa0;years; 54.2% female) were included. The mean follow-up was 51 ± 26.4&#xa0;months. The median OHS at final follow-up was 40 ± 6.2. The overall implant survival rate was 90%. The most common indications for revision were aseptic loosening (38%), instability (28%), and adverse reaction to metal debris (22%). Recurrent dislocation occurred in six patients (12%), and infection in four (8%).</p> Conclusion <p>Within the limitations of this Level IV retrospective study, the BioBall adapter system demonstrated satisfactory mid-term survival, functional outcomes, and radiological stability in revision THA where the femoral stem remains well fixed. Larger prospective studies are required to confirm long-term durability.</p>

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Mid-term Clinical and Radiological Outcome of the BioBall Adapter System in Revision Total Hip Arthroplasty: A Retrospective Study

  • 期刊论文

  • 发表日期：

    2026年7月22日

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  • Shailendra Pratap Singh,
  • Nikhil Shah,
  • Manish Kumar,
  • Akansha

摘要

Aim and Background

Revision total hip arthroplasty (rTHA) is a technically demanding procedure, particularly when the femoral stem is well-fixed. Removal of a stable stem increases operative time, morbidity, and risk of complications. The BioBall modular head–neck adapter system allows intraoperative restoration of leg length, offset, and version without stem removal. This study evaluates the mid-term clinical and radiological outcomes of the BioBall system in revision THA.

Methods

A retrospective, single-center observational case series was conducted including all rTHAs performed at Wrightington, Wigan and Leigh NHS Foundation Trust between January 2015 and August 2024 using the BioBall adapter system. Inclusion criteria were revision THA using the BioBall system with complete follow-up data. Demographic, clinical, and radiographic parameters were analyzed. The study had co-primary endpoints: (1) implant survival (defined as absence of re-revision) and (2) functional outcome measured using the Oxford Hip Score (OHS). Secondary endpoints included radiological stability and postoperative complications. Analyses were descriptive in nature.

Results

Fifty revisions in forty-six patients (mean age 73.5 ± 10.4 years; 54.2% female) were included. The mean follow-up was 51 ± 26.4 months. The median OHS at final follow-up was 40 ± 6.2. The overall implant survival rate was 90%. The most common indications for revision were aseptic loosening (38%), instability (28%), and adverse reaction to metal debris (22%). Recurrent dislocation occurred in six patients (12%), and infection in four (8%).

Conclusion

Within the limitations of this Level IV retrospective study, the BioBall adapter system demonstrated satisfactory mid-term survival, functional outcomes, and radiological stability in revision THA where the femoral stem remains well fixed. Larger prospective studies are required to confirm long-term durability.