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Acceptable outcomes with unicompartmental knee replacement and PCL deficiency are achievable: a case series of nine patients
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Acceptable outcomes with unicompartmental knee replacement and PCL deficiency are achievable: a case series of nine patients
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Journal Article
Acceptable outcomes with unicompartmental knee replacement and PCL deficiency are achievable: a case series of nine patients
2021
Overview
Purpose
Posterior cruciate ligament (PCL) deficiency is considered to be a contraindication for unicompartmental knee replacement (UKR); however, there is no evidence to support or contradict this. There are occasional circumstances where UKR in PCL deficient patients have been performed where the patient otherwise satisfies the indications for UKR. The aim of this paper is to describe the outcome of UKR in PCL deficient patients.
Methods
A retrospective study of patients with painful medial compartment osteoarthritis and PCL deficiency treated with Oxford UKR between 2006 and 2015 was undertaken. Clinical records from a prospectively recorded database were reviewed and outcomes were assessed based on revision rate, Oxford Knee Score (OKS), American Knee Society score and Tegner Activity Score.
Results
Nine patients were identified. The median age at surgery was 51 years (range 42–80) and median follow-up was 6 years (range 1–10). There was one bearing dislocation requiring open exchange. The outcome of seven patients was excellent (OKS > 41). Two patients, who were both elderly, had good outcomes (OKS 41 and 39). One patient had a poor outcome, but it is not clear if this was related to the knee as she had a learning disability and examination and radiographs of the knee were satisfactory.
Conclusion
The results of this small series suggest that excellent results can be achieved with UKR for selected patients with medial osteoarthritis in a PCL deficient knee that was functioning well before the osteoarthritis developed. On the basis of this a larger study should be undertaken. Until more results are available PCL deficiency should be considered a relative contra-indication to UKR.
Level of evidence
IV.
Publisher
Springer Berlin Heidelberg,John Wiley & Sons, Inc
Subject
