The mid-term clinical results of the phase 3 Oxford unicompartmental knee arthroplasty: a 6- to 8-year follow-up

2011 ◽  
Vol 22 (4) ◽  
pp. 307-314 ◽  
Author(s):  
Toby O. Smith ◽  
Allan Clark ◽  
Malcolm M. S. Glasgow ◽  
Simon T. Donell
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Clinical Results ◽  
Phase 3 ◽  
Unicompartmental Knee ◽  
Oxford Unicompartmental Knee Arthroplasty

scholarly journals Cemented versus Uncemented Oxford Unicompartmental Knee Arthroplasty: Is There a Difference?

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Burak Akan ◽  
Dogac Karaguven ◽  
Berk Guclu ◽  
Tugrul Yildirim ◽  
Alper Kaya ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Survival Rates ◽  
Operation Time ◽  
Clinical Results ◽  
Knee Prostheses ◽  
Unicompartmental Knee ◽  
The Cost ◽  
Oxford Unicompartmental Knee Arthroplasty

Purpose. The use of uncemented unicompartmental knee prostheses has recently increased. However, few studies on the outcomes of uncemented unicompartmental knee prostheses have been performed. The purpose of this study was to compare the outcomes of cemented and uncemented Oxford unicompartmental knee arthroplasty.Materials and Methods. This retrospective observational study evaluated the clinical and radiological outcomes of 263 medial Oxford unicompartmental prostheses (141 cemented, 122 uncemented) implanted in 235 patients. The mean follow-up was 42 months in the cemented group and 30 months in the uncemented group.Results. At the last follow-up, there were no significant differences in the clinical results or survival rates between the two groups. However, the operation time in the uncemented unicompartmental knee arthroplasty group was shorter than that in the cemented unicompartmental knee arthroplasty group. In addition, the cost of uncemented arthroplasty was greater.Conclusion. Despite the successful midterm results in the uncemented unicompartmental knee arthroplasty group, a longer follow-up period is required to determine the best fixation mode.

scholarly journals Good mid- to long-term results of the cemented oxford phase 3 unicompartmental knee arthroplasty in a non-designer centre

2021 ◽  
Author(s):  
D. M. Moore ◽  
G. A. Sheridan ◽  
A. Welch-Phillips ◽  
J. M. O’Byrne ◽  
P. Kenny
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Womac Score ◽  
Long Term Results ◽  
Secondary Outcome ◽  
Osteoarthritis Of The Knee ◽  
Phase 3 ◽  
Unicompartmental Knee ◽  
Aseptic Revision

Abstract Purpose Unicompartmental knee arthroplasty (UKA) provides patients with an alternative treatment to TKA in isolated medial compartment osteoarthritis providing better functional outcomes and faster recovery in the short term. Our aim was to quantify revision rates, predictors of revision, mortality rate and functionality of the Oxford Phase 3 UKA in a non-designer institution. Methods This was a retrospective review of prospectively collected regional registry data. All Oxford Phase 3 UKAs performed for medial tibio-femoral osteoarthritis of the knee joint were included from a single academic institution between the period of January 1st 2006 and December 30th 2009. Kaplan-Meier survivorship curves adjusting for loss to follow-up and deceased patients were generated. Primary outcome variables included all-cause and aseptic revision. Secondary outcome variables included functional outcome scores. Patients were reviewed at 6 months, 2 years, 5 years, 10 years and 15 years. Results A total of 64 cemented Oxford phase 3 UKAs were performed between January 2006 and November 2009. Fifteen-year follow-up data were available for 51 patients, of these 12 required revision. Survival rates, adjusting for patients that were either lost to follow-up or deceased, were 87.5% at 5 years, 81.4% at 10 years and 76.4% at 15 years. The overall aseptic revision rate at the time of review was 18.75% (n = 12). The only significant predictor of postoperative WOMAC score at 15 years was the preoperative WOMAC score (p = 0.03). Conclusion The Oxford Phase 3 UKA for medial tibio-femoral arthritis has promising outcomes at 15-year follow-up with a survival rate of 76.4% in a non-designer centre. Level of Evidence III.

scholarly journals Complications, Reasons for Reoperation, and 5-Year Prosthesis Survival Compared Between the Cemented and Cementless Oxford Unicompartmental Knee Arthroplasty Fixation Techniques at Thailand’s Largest National Tertiary Referral Center

2021 ◽  
Author(s):  
Jirayu Paugchawee ◽  
Chaturong Pornrattanamaneewong ◽  
Pakpoom Ruangsomboon ◽  
Rapeepat Narkbunnam ◽  
Keerati Chareancholvanich
Keyword(s):  
Knee Osteoarthritis ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Cox Proportional Hazards Model ◽  
Implant Survival ◽  
Unicompartmental Knee ◽  
Prosthesis Survival ◽  
Significant Difference ◽  
Oxford Unicompartmental Knee Arthroplasty

Abstract Background: Oxford unicompartmental knee arthroplasty (OUKA) yields favorable outcomes in patients with medial compartmental knee osteoarthritis; however, it remains unknown whether cemented or cementless OUKA fixation delivers better outcomes in Asian population. Accordingly, this study aimed to investigate the complications, reasons for reoperation, and 5-year prosthesis survival compared between cemented and cementless OUKA in Thai patients.Methods: A total of 466 cemented and 36 cementless OUKA that were performed during 2011-2015 with a minimum follow-up of five years were included. With reoperation for any reason as the endpoint, Kaplan-Meier analysis was performed to compare 5-year implant survival between groups. Complications, reasons for reoperation, and 90-day morbidity and mortality were compared between groups. Cox proportional hazards model was used to identify independent predictors of implant survival.Results: There was no significant difference in 5-year implant survival between the cemented and cementless groups (96.4% vs. 94.4%, p=0.375). The mean implant survival time was 113.0±0.8 and 70.8±1.9 months in the cemented and cementless groups, respectively (p=0.383). The most common reason for reoperation was bearing dislocation, and only one patient had 90-day morbidity. There was no significant difference between groups for complications or reasons for reoperation. No independent predictors of implant survival were identified in multivariate analysis.Conclusions: OUKA was shown to be a safe and durable reconstructive procedure in Thai patients with medial compartmental knee osteoarthritis. There was no significant difference in implant survival between the cemented and cementless groups during the 5-year follow-up, and no independent predictors of implant survival were identified. Trial registration: Thai Clinical Trials Registry, TCTR20200427004. Registered 27 April 2020 – Retrospectively registered.

scholarly journals Clinical Results of Oxford Unicompartmental Knee Arthroplasty

2008 ◽  
Vol 57 (4) ◽  
pp. 635-638
Author(s):  
Tetsuya Fukumoto ◽  
Kazutoshi Nomura ◽  
Noburo Hashimoto ◽  
Satoshi Maeda ◽  
Haruhiko Chuma ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Clinical Results ◽  
Unicompartmental Knee ◽  
Oxford Unicompartmental Knee Arthroplasty

scholarly journals Bearing Thickness Is Not a Predictive Factor for Damage and Penetration in Oxford Unicompartmental Knee Arthroplasty—A Retrieval Analysis

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4589
Author(s):  
Johannes Adrian Eckert ◽  
Ulrike Mueller ◽  
Tilman Walker ◽  
Martin Schwarze ◽  
Sebastian Jaeger ◽  
...  
Keyword(s):  
Aseptic Loosening ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Clinical Results ◽  
Material Loss ◽  
Unicompartmental Knee ◽  
Direct Light ◽  
Total Knee ◽  
Oxford Unicompartmental Knee Arthroplasty

The medial Oxford unicompartmental knee arthroplasty (OUKA) shows good survivorship, as well as clinical results. Aseptic loosening, however, remains one of the main reasons for revision and polyethylene debris is known to cause aseptic loosening. The role of bearing thickness in total as well as unicondylar knee arthroplasty has been the subject of controversial discussions, especially the longevity of lower thickness bearings in total knee arthroplasty was questioned. The purpose of this study was to assess the influence of bearing thickness on time to revision, damage pattern, penetration, and volumetric material loss. A cohort of 47 consecutively retrieved medial OUKA bearings was analyzed with conventional direct light microscopy applying the Hood damage analysis, as well as measuring the penetration depth. In this retrieval cohort, a difference on survival time, damage, penetration, as well as volumetric material loss could not be seen. We conclude that low as well as high thickness bearings can safely be used in OUKA without any relevant differences in terms of wear and damage.

scholarly journals Patient outcomes in Anteromedial Osteoarthritis Patients over 80 Years Old Undergoing Oxford Unicompartmental Knee Arthroplasty in China

2020 ◽  
Author(s):  
Jingbo Cheng ◽  
Mingli Feng ◽  
Guanglei Cao ◽  
Zheng Li ◽  
Shuai An ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Womac Score ◽  
Asian Patients ◽  
Unicompartmental Knee ◽  
Group 3 ◽  
Hss Score ◽  
Oxford Unicompartmental Knee Arthroplasty ◽  
Group 1

Abstract Background: The use of Oxford Unicompartmental Knee Arthroplasty (UKA) has increased rapidly both Western and Asian populations. And Oxford UKA also has excellent functional outcomes with high patient satisfaction. While previous evidence regarding clinical outcomes and survival rate after Oxford UKA based on studies in western populations, results may be different in Asian patients. Thus, the relevance of age for postoperative function after Oxford UKA is therefore still unclear. Hence, the aim of our study was to clarify the effectiveness and safety of Oxford UKA in Asian patients aged over 80 years. Methods: A retrospective review was performed of 195 patients (209 knees)who underwent OxfordUKA between June 2015 and January 2018. We divided all patients into threegroups (ages 60–69; ages 70-79; age over 80). We used the HSS score and WOMAC score to evaluate the general condition of the patients’ knees before surgery and at last follow-up.We also recorded perioperative complications and short-termcomplications. Result: 60 patients (60 knees) between the ages of 60 and 69 (Group 1), 70 patients (79 knees) between the ages of 70-79 (Group 2) and 65 patients (70 knees) over 80 years old (Group 3) were included in the study. The mean follow-up was 21.34±12.04, 22.08±11.38 and 21.76 ± 10.20 months in Group 1, 2 and 3, respectively.At last follow-up, the patients in Group 3 showed lower function scores as compared to group 1 and 2 ( P <0.05), butthe HSS score and the WOMAC score were significantly improved in three groups after surgery. In terms of perioperative and other complications, the three age groups did not differ significantly. Conclusion: Oxford UKA is an effective and safe treatment for osteoarthritis, even in old adult patients in China.Elderly patients have lower knee function scores than younger patients. But the knee joint pain symptoms of the elderly patients are relieved and the function is also improved compare to preoperative condition.

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