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Bulk autograft for a deficient acetabulum in Charnley low-friction arthroplasty. A 2-9-year follow-up study
V V Raut1, M H Stone, P D Siney
1Centre for Hip Surgery, Wrightington Hospital, Wigan, Lancashire, United Kingdom.
Insights
This study shows that using a bulk femoral head autograft to augment a deficient acetabulum during hip replacement surgery is a successful technique. The graft provided significant acetabular coverage and demonstrated good radiographic union and minimal resorption, leading to excellent clinical outcomes.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Regenerative Medicine
Background:
- Acetabular deficiency is a common challenge in hip replacement surgery, often requiring augmentation for optimal implant positioning and stability.
- Congenital hip dysplasia and secondary arthritis are frequent indications for hip arthroplasty with acetabular augmentation.
- Traditional augmentation methods may have limitations, necessitating evaluation of alternative techniques like autografting.
Purpose of the Study:
- To evaluate the efficacy and radiographic outcomes of using a bulk femoral head autograft to supplement acetabular deficiency during total hip arthroplasty.
- To assess graft incorporation, resorption, and the bone-cement interface following acetabular augmentation with autograft.
- To determine the clinical success and functional improvement in patients undergoing hip arthroplasty with acetabular augmentation using femoral head autograft.
Main Methods:
- A retrospective assessment of 40 hips in 36 patients who underwent Charnley low-friction arthroplasty with bulk femoral head autograft for acetabular deficiency.
- Radiographic evaluation of graft union, resorption, and bone-cement interface demarcation.
- Clinical assessment using the d'Aubigne and Postel score to evaluate pain, function, and movement before and after surgery.
Main Results:
- The femoral head autograft provided an average of 23% coverage of the socket hemisphere (range, 10-42%).
- Radiographic evidence of graft union was observed in 35 hips (87.5%), with minimal to moderate resorption in 12 cases (30%).
- Excellent clinical outcomes were reported, with significant improvements in d'Aubigne and Postel scores for pain, function, and movement, and all 40 cases were asymptomatic.
Conclusions:
- Bulk femoral head autograft is a safe and effective method for augmenting acetabular deficiency in total hip arthroplasty.
- The technique leads to good graft incorporation and satisfactory long-term clinical results, improving patient function and reducing pain.
- This approach offers a viable solution for complex hip reconstructions, particularly in cases of congenital dysplasia and secondary arthritis.
Abstract:
The authors assessed 40 hips in 36 patients where a bulk femoral head autograft was used to supplement deficient acetabulum while performing Charnley low-friction arthroplasty. The majority of the hips were congenitally dysplastic or dislocated with secondary arthritis. The average age at surgery was 47.5 years and the average follow-up period was 4 years. The graft provided a cover between 10 and 42% (mean, 23%) of the socket hemisphere. Union of the graft was evident on the radiograph in 35 hips. There was no graft resorption in 28 hips. Mild graft resorption was seen in 11 cases, and moderate graft resorption was seen in 1 case. In 24 cases, there was no demarcation at the bone-cement interface of the socket. Asymptomatic demarcation of 1 mm thickness or less was seen in 16 hips, of which only 2 showed demarcation at the cement-graft interface. All 40 cases were clinically asymptomatic and successful thus far, with the mean d'Aubigne and Postel score improving from 3.1, 2.8, and 2.9 before surgery to 5.9, 5.4, and 4.9 after surgery for pain, function, and movement, respectively.