Cementless acetabular revision arthroplasty.
OBJECTIVE
To evaluate the effects of clinical factors on outcome after acetabular revision with a cementless beaded cup.


METHODS
Retrospective case series.


METHODS
Tertiary care referral centre.


METHODS
Forty-one patients who underwent acetabular revision with a cementless cup were followed up for a mean of 3.4 years.


METHODS
Acetabular revision with a beaded cementless cup in all patients. A morcellized allograft was used in 10 patients.


METHODS
A modified Harris hip score (range of motion measurement omitted), the SF-36 health survey, and the Western Ontario McMaster (WOMAC) osteoarthritis index. Multivariate analysis was used to evaluate the effects of age, gender, morcellized allografting, time to revision from the previous operation, acetabular screw fixation and concurrent femoral revision on outcome.


RESULTS
Gender accounted for a significant portion of the variation seen in the SF-36 physical component scores (r = 0.36, p = 0.02), with women tending to have worse results. Increasing age was associated with lower WOMAC index function scores (r = 0.36, p = 0.03), whereas concurrent femoral revision tended to have a positive effect on WOMAC index function (r = 0.39, p = 0.01). None of the potential clinical predictors had any significant effect on the SF-36 mental component scores, or WOMAC index pain and stiffness scores.


CONCLUSIONS
In cementless acetabular revision arthroplasty, physical function, as measured by generic and limb-specific scales, may be affected by gender, age and the presence of a concurrent femoral revision. Time to revision from the previous operation, morcellized allografting and screw fixation of the acetabulum did not affect outcomes. This information may provide some prognostic value for patients' expectations.
Jain
R
R
Department of Surgery, St. Michael's Hospital, University of Toronto, Ont.
Schemitsch
E H
EH
Waddell
J P
JP
D000077:Acetabulum / Q000601:surgery*; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D001843:Bone Cements; D001863:Bone Screws; D016025:Bone Transplantation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
D001843:Bone Cements