Table 6: Metal-on-Metal Hip Resurfacing Arthroplasty: Clinical Outcomes of Case Series*.
| Study | Study Period | Mean Duration of Follow-up, Years | Number of Patients (Hips) | Mean Age, Years (Range) | Preoperative Diagnosis Number (%) | Prosthesis | Number of Patients Available for Follow-up |
|---|---|---|---|---|---|---|---|
| De Smet et al. 2005 (36) | 1998–2004 | 2.8 (2–5.0) | 252 (268) | 49.7 (16–75) | OA: 203 (80.6) RA: 9 (3.57) Necrosis: 22 (7.26) Congenital dislocation: 12 (4.76) Traumatic: 3 (1.19) Neurometabolic: 1 (0.4) Other: 2 (0.79) |
BHR | All except 3 patients who died |
| Back et al. 2005 (37) | 1999–2001 | 3 (2–4.4) | 230 | 52.1 (18–82) | OA: 203 (88.3) RA: 3 (1.3) Avascular necrosis: 12 (5.2) Neurometabolic: 2 (0.9) Other: 10 (4.3) |
BHR | All |
| Treacy et al. 2005 (38) | 1997–1998 | 130 (144) | 52.1 (17–76) | OA: 125 (87) RA: 2 (1) Avascular necrosis: 10 (7) Developmental dysplasia: 3 (2) Other: 4 (3) |
BHR | At 5 years: 107 (76) hips | |
| Lilikakis et al. 2005 (39) | 2002–2002 | 2.8 (2–3.2) | 66 (70) | 51.5 (23.3–72.7) | OA: 64 (97) Osteonecrosis: 1 (1) Chondrolysis: 1 (1) |
Cormet 2000: femoral and acetabular components were coated with hydroxyapatite | 59/66 radiographs were available 60/66 patients returned the questionnaire at the 2-year follow-up |
| Amstutz et al. 2004 (34) | 1996–2000 | 3.5 (2.26.2) | 355 (400 hips) | 48.2 (1577) | OA: 262 (66) Osteonecrosis: 36 (9) Developmental dysplasia: 43 (10.8) Posttraumatic c arthritis: 31 (7.8) Leg-Calve-Perthes disease: 10 (2.5) Slipped capital femoral epiphysis: 7 (1.8) Ankylosing spondylitis: 4 (1) Juvenile rheumatoid arthritis: 3 (0.8) Rheumatoid arthritis: 3 (0.8) Melorheostosis: 1 (0.3) Previous operations: 25 (6.3) |
Conserve Plus | 352 |
| Daniel et al. 2004 (35) | 1994–2001 (but not 1996)* | 3.3 (1.1-8.2) | 384 (446 hips) | 48.3 (26.8-54.9) | Primary OA | McMinn (43 hips, 1994–1995) 43 prostheses BHR (403 hips 1997-2001) 403 prostheses |
All |
| Beaule et al. 2004 (40) | NR | 3 (2–5) | 83 (94) | 34.2 (15–40) | OA: (24.4) Trauma: (18.1) Osteonecrosis: (18.1) Developmental dysplasia of the hip: (19.1) Rheumatoid diseases: (6.4) Slipped capital femoral epiphysis: (4.3) Leg-Calve-Perthes disease: (6.4) Ankylosing spondylitis: (3.2) |
Conserve Plus | 81 |
| Beaule et al. 2004 (41) | 1993–1996 | 8.7 (7.2–10) | 39 (42 hips) | 47.5 (22–69) | OA: 23 (55) Osteonecrosis: 7 (16.7) Hip dysplasia: 4 (9.5) Arthrokatadysis: 3 (7) RA: 2 (4.8) Slipped capital femoral epiphysis: 2 (4.8) Legg-Calve-Perthes: 1 (2.4) |
McMinn femoral components: All were cemented. acetabular component: Was cemented into the native acetabulum in 19 hips. 16 hips were reconstructed by cementing the McMinn acetabular component into the cemented into a cementless cobalt chromium alloy, porous-coated surface replacement socket due to absence of a locking mechanism. 7 hips were hydroxyapatite coated. |
All |
*
186 patients operated on in 1996 were excluded from the study because a unique pattern of failure, (believed to be due to the manufacture) occurred in the implants used; OA indicates osteoarthritis; RA, rheumatoid arthritis; AN, avascular necrosis; BHR, Birmingham Hip Resurfacing; NR, not reported.