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A randomised controlled trial of cemented versus cementless press-fit condylar total knee replacement: 15-Year survival analysis

Lookup NU author(s): Paul Baker, Dr Meng Khaw, Professor Paul Gregg

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Abstract

We report the long-term survival of a prospective randomised consecutive series of 501 primary knee replacements using the press-fit condylar posterior cruciate ligament- retaining prosthesis. Patients received either cemented (219 patients, 277 implants) or cementless (177 patients, 224 implants) fixation. Altogether, 44 of 501 knees (8.8%) underwent revision surgery (24 cemented vs20 cementless). For cemented knees the 15- year survival rate was 80.7% (95% confidence interval (CI) 71.5 to 87.4) and for cementless knees it was 75.3% (95% CI 63.5 to 84.3). There was no significant difference between the two groups (cemented vs cementless; hazard ratio (HR) 0.83, 95% CI 0.45 to 1.52, p = 0.55). When comparing the covariates there was no significant difference in the rates of survival between the side of operation (HR 0.58, p = 0.07), age (HR 0.97, p = 0.10) and diagnosis (HR 1.25 p = 0.72). However, there was a significant gender difference, with males having a higher failure rate with cemented fixation (HR 2.48, p = 0.004). Females had a similar failure rate in both groups. This single-surgeon series, with no loss to follow-up, provides reliable data of the revision rates of one of the most commonly-used total knee replacements. The survival of the press-fit condylar total knee replacement remained good at 15 years, irrespective of the method of fixation. ©2007 British Editorial Society of Bone and Joint Surgery.


Publication metadata

Author(s): Baker PN, Khaw FM, Kirk LMG, Esler CNA, Gregg PJ

Publication type: Article

Publication status: Published

Journal: Journal of Bone and Joint Surgery - Series B

Year: 2007

Volume: 89

Issue: 12

Pages: 1608-1614

Print publication date: 01/12/2007

ISSN (print): 0301-620X

ISSN (electronic): 0968-7300

Publisher: British Editorial Society of Bone and Joint Surgery

URL: http://dx.doi.org/10.1302/0301-620X.89B12.19363

DOI: 10.1302/0301-620X.89B12.19363

PubMed id: 18057361


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