We randomised 62 knees to receive either cemented or cementless versions of the Oxford unicompartmental knee replacement. The implants used in both arms of the study were similar, except that the cementless components were coated with porous titanium and hydroxyapatite. The tibial interfaces were studied with fluoroscopically-aligned radiographs. At one year there was no difference in clinical outcome between the two groups. Narrow radiolucent lines were seen at the bone-implant interfaces in 75% of cemented tibial components. These were partial in 43%, and complete in 32%. In the cementless implants, partial radiolucencies were seen in 7% and complete radiolucencies in none. These differences are statistically significant (p < 0.0001) and imply satisfactory bone ingrowth into the cementless implants.

Original publication

DOI

10.1302/0301-620X.91B2.21413

Type

Journal article

Journal

J Bone Joint Surg Br

Publication Date

02/2009

Volume

91

Pages

185 - 189

Keywords

Aged, Aged, 80 and over, Arthroplasty, Replacement, Knee, Bone Cements, Cementation, Coated Materials, Biocompatible, Female, Fluoroscopy, Humans, Knee Prosthesis, Male, Middle Aged, Osteoarthritis, Knee, Prosthesis Design, Tibia, Titanium, Treatment Outcome