Minimum 10-year follow-up results of ALPINA cementless hydroxyapatite-coated anatomic unicompartmental knee arthroplasty

Abstract

One hundred and one unicompartmental knee arthroplasties (UKA) were done between 1996 and 2000 with ALPINA(®) UNI, a cementless hydroxyapatite-coated anatomic prosthesis. Sixty-five knees were available for the long-term follow-up at a mean of 11 years. The mean IKS improved from 119.3 ± 16.8 points preoperatively to 171.4 ± 25.3 at the latest follow-up (p < 0.0001). Eighty-nine percentage of the knees were rated good and excellent. The mean knee flexion has significantly improved from 120°5 preoperatively to 127°3 at the latest follow-up (p < 0.01). Eleven revision procedures were done: 1 for early knee degeneration on rheumatoid arthritis, 1 for degeneration of osteoarthritis in the opposite compartment of the knee, 1 for unexplained pain and 1 for late ACL rupture, all these 4 cases were replaced by total knee arthroplasties; 3 revisions by another UKA were done due to polyethylene insert fracture; and 4 partial revision were done for bearing exchange due to severe polyethylene wear. When revision for any reason was defined as the end point, the 13-year Kaplan-Meier survival rate was 88 % (95 % CI 81-95 %) and when revision due to implant mechanical failure (excluding degeneration of osteoarthritis in the opposite compartment of the knee and bearing exchange only) was defined as the end point, the 13-year survival rate was 94 % (95 % CI 89.1-99.1 %).

Ten-Year Survivorship, Patient-Reported Outcomes, and Satisfaction of a Fixed-Bearing Unicompartmental Knee Arthroplasty

“…Most cementless UKAs have been performed in Europe, and there are only a limited number of fixed-bearing cementless designs with clinical outcomes reported. The AlpinaUNI (Biomet, France, Valence) was primarily used in France and is a cementless hydroxyapatite-coated anatomic prosthesis; 65 knees with a minimum of 10-year follow-up showed 88% survivorship for revision for any reason [49]. The Unix UKR (Stryker Orthopedics, Mahwah, NJ) is also a hydroxyapatite-coated implant with a unique horizontal fin inserted under the tibial spine; it has no pegs or keel, and the surgeon can use up to 5 screws to augment the tibial component fixation.…”

Five-year experience of cementless Oxford unicompartmental knee replacement

“…Cementless fixation is a viable alternative to cemented unicompartmental knee replacement (UKR) for treating symptomatic anteromedial osteoarthritis [2,12,15,16,26,23,28].…”

Comparable incidence of periprosthetic tibial fractures in cementless and cemented unicompartmental knee arthroplasty: a systematic review and meta-analysis

“…2 ). Subgroup analysis for the Oxford Partial Knee implants was performed using 21 clinical studies [ 1 , 3 , 10 , 17 , 18 , 30 , 33 , 44 , 46 , 48 , 51 , 53 – 55 , 58 , 59 , 70 , 72 , 73 , 83 , 85 , 96 ], resulting in an incidence of 1.22% (95% CI 0.60–2.49) for cementless and 0.99% (95% CI 0.62–1.59) for cemented fixation (Fig. 3 ).…”