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Purpose <p>Our retrospective study focused on long-term outcomes of converting a fused hip to a cementless metaphyseal-fitting anatomic hip system including: (1) validated clinical scores; (2) radiographic assessment; (3) impact on neighbouring joints; (4) osteolysis and revision rates; (5) complication profiles; (6) implant survivorship; and (7) patient satisfaction.</p> Methods <p>We reviewed 96 THAs in 88 patients (mean age, 42.3&#xa0;years [range, 21 to 74]) who underwent conversion of fused hip through a posterolateral approach to a cementless a metaphyseal-fitting anatomic cementless total hip system, performed by one surgeon. The third generation Biolox Forte at 28&#xa0;mm as the bearing surface was used in all hips. The mean follow-up was 23.5&#xa0;years (range, 14 to 30&#xa0;years).</p> Results <p>At the final follow-up, the mean Harris hip score was 91.2 points (range, 52 to 100 points). Mean hip flexion was 89° (range, 70° to 120°). Three acetabular (3%) and five femoral components (5%) that were revised. About 70 to 80% of patients expressed overall satisfaction and 66% of patients reported marked improvement in quality of life. A Kaplan–Meier survivorship analysis at 23.5&#xa0;years showed a 97% survival rate (95% CI, 93 to100%) for the acetabular component and 91% (95% CI, 89 to 98%) for the femoral component.</p> Conclusions <p>Conversion of hip fusion to THA using metaphyseal-fitting anatomic cementless hip system appears to provide good long-term outcomes. The risk for postoperative complication including abductor dysfunction and nerve injury should be carefully discussed with patients prior to surgery.</p>

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Conversion of fused hips to cementless total hip arthroplasty long-term (23.5 years) functional outcome, survival and patient satisfaction

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Young-Hoo Kim,
  • Jang-Won Park

摘要

Purpose

Our retrospective study focused on long-term outcomes of converting a fused hip to a cementless metaphyseal-fitting anatomic hip system including: (1) validated clinical scores; (2) radiographic assessment; (3) impact on neighbouring joints; (4) osteolysis and revision rates; (5) complication profiles; (6) implant survivorship; and (7) patient satisfaction.

Methods

We reviewed 96 THAs in 88 patients (mean age, 42.3 years [range, 21 to 74]) who underwent conversion of fused hip through a posterolateral approach to a cementless a metaphyseal-fitting anatomic cementless total hip system, performed by one surgeon. The third generation Biolox Forte at 28 mm as the bearing surface was used in all hips. The mean follow-up was 23.5 years (range, 14 to 30 years).

Results

At the final follow-up, the mean Harris hip score was 91.2 points (range, 52 to 100 points). Mean hip flexion was 89° (range, 70° to 120°). Three acetabular (3%) and five femoral components (5%) that were revised. About 70 to 80% of patients expressed overall satisfaction and 66% of patients reported marked improvement in quality of life. A Kaplan–Meier survivorship analysis at 23.5 years showed a 97% survival rate (95% CI, 93 to100%) for the acetabular component and 91% (95% CI, 89 to 98%) for the femoral component.

Conclusions

Conversion of hip fusion to THA using metaphyseal-fitting anatomic cementless hip system appears to provide good long-term outcomes. The risk for postoperative complication including abductor dysfunction and nerve injury should be carefully discussed with patients prior to surgery.