Simon Johnson1, Peter Jones, John H Newman. 1. Avon orthopaedic centre, Southmead hospital, Bristol, UK. simonandti@telkomsa.net <simonandti@telkomsa.net>
Abstract
UNLABELLED: Unicompartmental knee replacements (UKR) converted to total knee replacements (TKR) have often been viewed with scepticism because of the perceived difficulty of revising a UKR to a TKR. We present the survivorship analysis of a 77 patient cohort as well as the current results of a 35 patient cohort. There were a total of 77 patients in the survivorship study with an average follow-up of 6.9 years and an average Bristol Knee Score of 78.5. Using Kaplan-Meier survivorship analysis, a 91% survivorship at 10 years was demonstrated. The average age at revision to TKR was 66.1 years. The average follow-up period was 10.5 years and a recent clinical and radiological review of the 35 living patients showed an average Bristol Knee Score of 78.2 with 16 excellent, 11 good, five fair and three failed. CONCLUSION: The results of the UKRs have already shown it to be safe, reliable and repeatable. We believe that this study shows that revision of UKR to TKR is not technically difficult and that the results are comparable to the results of primary TKRs.
UNLABELLED: Unicompartmental knee replacements (UKR) converted to total knee replacements (TKR) have often been viewed with scepticism because of the perceived difficulty of revising a UKR to a TKR. We present the survivorship analysis of a 77 patient cohort as well as the current results of a 35 patient cohort. There were a total of 77 patients in the survivorship study with an average follow-up of 6.9 years and an average Bristol Knee Score of 78.5. Using Kaplan-Meier survivorship analysis, a 91% survivorship at 10 years was demonstrated. The average age at revision to TKR was 66.1 years. The average follow-up period was 10.5 years and a recent clinical and radiological review of the 35 living patients showed an average Bristol Knee Score of 78.2 with 16 excellent, 11 good, five fair and three failed. CONCLUSION: The results of the UKRs have already shown it to be safe, reliable and repeatable. We believe that this study shows that revision of UKR to TKR is not technically difficult and that the results are comparable to the results of primary TKRs.
Authors: David J Beard; Loretta J Davies; Jonathan A Cook; Graeme MacLennan; Andrew Price; Seamus Kent; Jemma Hudson; Andrew Carr; Jose Leal; Helen Campbell; Ray Fitzpatrick; Nigel Arden; David Murray; Marion K Campbell Journal: Health Technol Assess Date: 2020-04 Impact factor: 4.014
Authors: Joseph F Konopka; Andreas H Gomoll; Thomas S Thornhill; Jeffrey N Katz; Elena Losina Journal: J Bone Joint Surg Am Date: 2015-05-20 Impact factor: 5.284
Authors: Peter L Lewis; David C Davidson; Stephen E Graves; Richard N de Steiger; William Donnelly; Alana Cuthbert Journal: Clin Orthop Relat Res Date: 2018-04 Impact factor: 4.176
Authors: Jacqueline R Hang; Tyman E Stanford; Stephen E Graves; David C Davidson; Richard N de Steiger; Lisa N Miller Journal: Acta Orthop Date: 2010-02 Impact factor: 3.717