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Corresponding Author

Ahmed Ashour Mohammed

Document Type

Original Article

Abstract

Background: The number of revision total knee arthroplasties (TKAs) is increasing due to the prevalence of primary TKAs.

Aim: To evaluate the early results of revision knee arthroplasty for different types of bone loss using constraint knee prostheses.

Methods: This prospective study was carried out on 30 patients aged 18 years or older, both sexes, with type 2 and type 3 bone loss. Patients were divided into two groups: Group 1 (n=21) who had type 2 bone loss, and group 2 (n=9) who had type 3 bone loss. The study was done after approval from the Ethical Committee Al-Azhar university hospitals from March 2021 to May 2024.

Results: There were strong significant correlations between Outcomes and Pre Knee Society score (KSS), Pre (SF-36) score and Pre-Western Ontario and McMaster Universities Osteoarthritis (WOMAC). In Univariate and multivariate correlation regression, there were strong significant correlations between outcomes and Pre KSS, Pre short form (SF)-36 score and Pre WOMAC (P<0.0001).

Conclusions: The prostheses with a lower degree of constraint provide more superior functional outcome. The only exception is that patients undergoing revision arthroplasty for infection who have type II or III bone defect may benefit from the use of linked constraint prosthesis.

Keywords

Total Knee Arthroplasties; Bone Loss; Constrained Condylar Knee; Anderson Orthopaedic Research Institute

Subject Area

Orthopedics

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