title: A prospective clinical and radiological study comparing hydroxyapatite-coated with cemented tibial components in total knee replacement.
abstract: This prospective study compares the outcome of 157 hydroxyapatite (HA)-coated tibial components with 164 cemented components in the ROCC Rotating Platform total knee replacement in 291 patients. The mean follow-up was 7.6 years (5.2 to 11). There were two revisions for loosening: one for an HA-coated and one for a cemented tibial component. Radiological evaluation demonstrated no radiolucent lines with the HA-coated femoral components. A total of three HA-coated tibial components exhibited radiolucent lines at three months post-operatively and these disappeared after three further months of protected weight-bearing. With HA-coated components the operating time was shorter (p < 0.006) and the radiological assessment of the tibial interface was more stable (p < 0.01). Using revision for aseptic loosening of the tibial component as the end point, the survival rates at nine years was identical for both groups at 99.1%. Our results suggest that HA-coated components perform at least as well as the same design with cemented components and compare favourably with those of series describing cemented or porous-coated knee replacements, suggesting that fixation of both components with hydroxyapatite is a reliable option in primary total knee replacement.
authors.affiliation: Centre Médical Vauban, 2A Avenue de Ségur, Paris 75007, France. mbercovy@noos.fr
authors.forename: M
authors.initials: M
authors.lastname: Bercovy
authors.forename: J
authors.initials: J
authors.lastname: Beldame
authors.forename: B
authors.initials: B
authors.lastname: Lefebvre
authors.forename: A
authors.initials: A
authors.lastname: Duron
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation / Q000379:methods*; D001843:Bone Cements; D002484:Cementation / Q000379:methods*; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements; D020099:Coated Materials, Biocompatible; D017886:Durapatite