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Background <p>This retrospective study evaluates the outcomes of hip reconstruction surgeries utilizing constrained acetabular liners (CAL) within an orthopaedic oncology practice over a 12-year period (2010–2022).</p> Methods <p>A total of 60 patients were included, divided into two groups: 26 patients (43.3%) undergoing complex arthroplasty and 34 patients (56.7%) with oncological conditions. Variables assessed included patient demographics, implant types, surgical techniques, complications, and survival rates.</p> Results <p>The arthroplasty group was significantly older (mean age 66.3 ± 13.87 years) compared to the oncology group (mean age 52.5 ± 14.89 years; <i>p</i> &lt; 0.001). Malignant tumors were predominant in the oncology group (82.4%). Standard stem total hip arthroplasty (THA) was more common in the arthroplasty group (92.3%) than in the oncology group (61.8%; <i>p</i> = 0.034). Most arthroplasty patients received only a constrained cup (92.3%), whereas oncology patients often required complex reconstructions with cages (76.5%; <i>p</i> &lt; 0.001). The oncology group was more likely to have smaller cups (44 mm) and femoral heads (22 mm) (<i>p</i> &lt; 0.001 and <i>p</i> = 0.003, respectively). The overall complication rate was low, with 84.6% of arthroplasty patients and 64.7% of oncology patients experiencing no complications (<i>p</i> = 0.100). Infection rates were higher in the oncology group (26.5%) compared to the arthroplasty group (11.5%), though not statistically significant (<i>p</i> = 0.100). No cases of implant loosening or revision due to infection were reported during follow-up.</p> Conclusion <p>Constrained acetabular liners offer a viable option for complex salvage hip surgeries, providing early postoperative stability and a low dislocation rate, particularly in oncologic cases. However, a high mortality rate within the first two years (69.7%) suggests that patient survival may often precede implant failure. Limitations include small sample size and limited follow-up duration, underscoring the need for longer-term studies to better evaluate CAL performance in diverse patient populations.</p>

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Outcome of Constrained Acetabular Liners in an Orthopaedic Oncology Practice: A Short-Term Review

  • 期刊论文

  • 发表日期：

    2026年6月14日

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  • Nur Ayuni Khirul Ashar,
  • Vivek Ajit Singh,
  • Abilash Kumar,
  • Nor Faissal Yasin

摘要

Background

This retrospective study evaluates the outcomes of hip reconstruction surgeries utilizing constrained acetabular liners (CAL) within an orthopaedic oncology practice over a 12-year period (2010–2022).

Methods

A total of 60 patients were included, divided into two groups: 26 patients (43.3%) undergoing complex arthroplasty and 34 patients (56.7%) with oncological conditions. Variables assessed included patient demographics, implant types, surgical techniques, complications, and survival rates.

Results

The arthroplasty group was significantly older (mean age 66.3 ± 13.87 years) compared to the oncology group (mean age 52.5 ± 14.89 years; p < 0.001). Malignant tumors were predominant in the oncology group (82.4%). Standard stem total hip arthroplasty (THA) was more common in the arthroplasty group (92.3%) than in the oncology group (61.8%; p = 0.034). Most arthroplasty patients received only a constrained cup (92.3%), whereas oncology patients often required complex reconstructions with cages (76.5%; p < 0.001). The oncology group was more likely to have smaller cups (44 mm) and femoral heads (22 mm) (p < 0.001 and p = 0.003, respectively). The overall complication rate was low, with 84.6% of arthroplasty patients and 64.7% of oncology patients experiencing no complications (p = 0.100). Infection rates were higher in the oncology group (26.5%) compared to the arthroplasty group (11.5%), though not statistically significant (p = 0.100). No cases of implant loosening or revision due to infection were reported during follow-up.

Conclusion

Constrained acetabular liners offer a viable option for complex salvage hip surgeries, providing early postoperative stability and a low dislocation rate, particularly in oncologic cases. However, a high mortality rate within the first two years (69.7%) suggests that patient survival may often precede implant failure. Limitations include small sample size and limited follow-up duration, underscoring the need for longer-term studies to better evaluate CAL performance in diverse patient populations.