Cementless Oxford Medial Unicompartmental Knee Replacement—Clinical and Radiological Results of 228 Knees with a Minimum 2-Year Follow-Up

(1) Background: Studies show several advantages of unicompartmental knee replacement (UKR) over total knee replacements (TKR), whereas registry based revision rates of UKR are significantly higher than for TKA. Registry data report lower revision rates for cementless UKR compared to cemented UKR. The aim of this study was to assess clinical and radiological results of cementless Oxford UKR (OUKR) in an independent cohort. (2) Methods: This retrospective cohort study examines a consecutive series of 228 cementless OUKR. Clinical outcome was measured using functional scores (Oxford Knee Score (OKS), American Knee Society Score (AKSS), Hannover Functional Ability Questionnaire for Osteoarthritis (FFbH-OA), range of motion (ROM)), pain and satisfaction. Radiographs were analyzed regarding the incidence of radiolucent lines (RL), implant positioning, and their possible impact on clinical outcome. (3) Results: At a mean follow-up of 37.1 months, the two and three year revision free survival-rates were 97.5% and 96.9%. Reasons for revision surgery were progression of osteoarthritis, inlay dislocation and pain. All clinical outcome scores showed a significant improvement from pre- to postoperative. The incidence of RL around the implant was highest within the first year postoperatively (36%), and decreased (5%) within the second year. Their presence was not correlated with inferior clinical outcome. Implant positioning showed no influence on clinical outcome. (4) Conclusion: Cementless OUKR showed excellent clinical outcome and survival rates, with reliable osteointegration. Neither the incidence of radiolucent lines nor implant positioning were associated with inferior clinical outcome.

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Minimally invasive unicompartmental knee replacement: Midterm clinical outcome

PLoS ONE ◽

10.1371/journal.pone.0176082 ◽

2017 ◽

Vol 12 (5) ◽

pp. e0176082 ◽

Cited By ~ 2

Author(s):

Shaoqi Tian ◽

Jiangjun Liu ◽

Wanqing Yuan ◽

Yuanhe Wang ◽

Chengzhi Ha ◽

...

Keyword(s):

Clinical Outcome ◽

Minimally Invasive ◽

Knee Replacement ◽

Unicompartmental Knee Replacement ◽

Unicompartmental Knee

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Obesity has no adverse effect on the outcome of unicompartmental knee replacement at a minimum follow-up of seven years

The Bone & Joint Journal ◽

10.1302/0301-620x.95b8.31370 ◽

2013 ◽

Vol 95-B (8) ◽

pp. 1064-1068 ◽

Cited By ~ 53

Author(s):

E. Cavaignac ◽

V. Lafontan ◽

N. Reina ◽

R. Pailhé ◽

M. Warmy ◽

...

Keyword(s):

Adverse Effect ◽

Knee Replacement ◽

Unicompartmental Knee Replacement ◽

Unicompartmental Knee

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Assessment of radiolucent lines around the Oxford unicompartmental knee replacement

Journal of Bone and Joint Surgery - British Volume ◽

10.1302/0301-620x.93b6.26062 ◽

2011 ◽

Vol 93-B (6) ◽

pp. 777-781 ◽

Cited By ~ 21

Author(s):

S. Kalra ◽

T. O. Smith ◽

B. Berko ◽

N. P. Walton

Keyword(s):

Knee Replacement ◽

Unicompartmental Knee Replacement ◽

Radiolucent Lines ◽

Unicompartmental Knee

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Comparison between the 2-peg Type and the Conventional Type of Oxford Unicompartmental Knee Arthroplasty: The Clinical and Radiological Results of Short-term Follow-up

The Journal of Korean Knee Society ◽

10.5792/jkks.2011.23.1.33 ◽

2011 ◽

Vol 23 (1) ◽

pp. 33

Author(s):

Jong Hun Ji ◽

Sang Eun Park ◽

Young Yul Kim ◽

Jae Jung Jeong ◽

Min Gu Kang ◽

...

Keyword(s):

Knee Arthroplasty ◽

Unicompartmental Knee Arthroplasty ◽

Short Term ◽

Radiological Results ◽

Unicompartmental Knee ◽

Clinical And Radiological Results ◽

Oxford Unicompartmental Knee Arthroplasty ◽

Conventional Type

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Functional improvement after unicompartmental knee replacement: a follow-up study with a performance based knee test

Knee Surgery Sports Traumatology Arthroscopy ◽

10.1007/s00167-007-0351-7 ◽

2007 ◽

Vol 15 (10) ◽

pp. 1187-1193 ◽

Cited By ~ 23

Author(s):

Lucas L. A. Kleijn ◽

Wouter L. W. van Hemert ◽

Will G. H. Meijers ◽

Arnold D. M. Kester ◽

Lukas Lisowski ◽

...

Keyword(s):

Knee Replacement ◽

Functional Improvement ◽

Unicompartmental Knee Replacement ◽

Follow Up Study ◽

Unicompartmental Knee ◽

A Performance

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One stage bilateral unicompartmental knee replacement: Similar early clinical outcome with shorter rehabilitation and better resources utilization compared with two stage

Journal of Orthopaedics Trauma and Rehabilitation ◽

10.1177/2210491720973673 ◽

2020 ◽

pp. 221049172097367

Author(s):

Yan Ho Bruce Tang ◽

Hok Leung Wong ◽

Tai Fong Wong

Keyword(s):

Clinical Outcome ◽

Knee Replacement ◽

Operative Time ◽

Unicompartmental Knee Replacement ◽

Knee Score ◽

Two Stage ◽

One Stage ◽

Unicompartmental Knee ◽

Early Results ◽

The One

Introduction: There are a lot of debates on the advantages and safety profile of one stage bilateral knee arthroplasty. Most of the studies focus on total knee replacement, and it may not be applied directly to unicompartmental knee replacement (UKR). We would like to compare the early results of one and two stage bilateral UKR in our center. Methods: This is a retrospective review of all the bilateral medial UKR done in our center in 2018–2019. Patients’ demographic data, operative time, postoperative blood, length of stay (LOS) and complications were recorded. The number of admissions, pre-operative assessment sessions (PAS), and weeks of post-operative physiotherapy were analyzed. Clinical outcome was measured by Knee society knee score and range of motion (ROM). Results: Our center performed 97 UKR in 2018–2019, with 50 UKR performed in 25 patients, among which 16 received one stage while 9 received two stage bilateral UKR. Both groups had similar mean age, BMI, sex ratio, ASA grading, pre-operative knee score and ROM. Patient in the one stage group required only 1 PAS/admission/operation to treat both knees with a mean LOS of 7.3 days and 7.8 weeks of physiotherapy, while those in the two stage group required 2 PAS/admissions/operations with a mean cumulative LOS of 9.8 days and 14.1 weeks of physiotherapy. The mean cumulative operative time was similar for both groups but the one stage group only required 1 operative session. There was no difference in blood loss and there was no transfusion or complication. The post-operative knee score and ROM at 3 and 6 months were similar for both groups. Conclusion: In suitable patients with bilateral medial OA knee, one stage bilateral UKR offers simliar early clinical outcome with shorter rehabilitation duration but without increasing complications compared with two stage. Resources can therefore be better utilized.

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