LONG TERM RESULTS OF FIXED BEARING MEDIAL UNICOMPARTMENTAL KNEE REPLACEMENT USING A CEMENTED ALL POLYETHYLENE TIBIAL COMPONENT

The Knee ◽  
2020 ◽  
Vol 27 ◽  
pp. S6-S7
Author(s):  
R. Bidwai ◽  
K. Howard ◽  
R. Parkinson
The Knee ◽  
2013 ◽  
Vol 20 (5) ◽  
pp. 328-331 ◽  
Author(s):  
Matthew J. Hall ◽  
David A. Connell ◽  
Hayden G. Morris

The Knee ◽  
2009 ◽  
Vol 16 (5) ◽  
pp. 310-313 ◽  
Author(s):  
R. Chau ◽  
A. Gulati ◽  
H. Pandit ◽  
D.J. Beard ◽  
A.J. Price ◽  
...  

2012 ◽  
Vol 94-B (10) ◽  
pp. 1356-1361 ◽  
Author(s):  
M. R. Streit ◽  
T. Walker ◽  
T. Bruckner ◽  
C. Merle ◽  
J. P. Kretzer ◽  
...  

2014 ◽  
Vol 96-B (3) ◽  
pp. 345-349 ◽  
Author(s):  
A. D. Liddle ◽  
H. G. Pandit ◽  
C. Jenkins ◽  
P. Lobenhoffer ◽  
W. F. M. Jackson ◽  
...  

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3345
Author(s):  
Yong-Gon Koh ◽  
Hyoung-Taek Hong ◽  
Kyoung-Tak Kang

The current study aims to analyze the biomechanical effects of ultra-high molecular weight polyethylene (UHMWPE) and carbon-fiber-reinforced polyetheretherketone (CFR-PEEK) inserts, in varus/valgus alignment, for a tibial component, from 9° varus to 9° valgus, in unicompartmental knee replacement (UKR). The effects on bone stress, collateral ligament force, and contact stress on other compartments were evaluated under gait cycle conditions, by using a validated finite element model. In the UHMWPE model, the von Mises’ stress on the cortical bone region significantly increased as the tibial tray was in valgus >6°, which might increase the risk of residual pain, and when in valgus >3° for CFR-PEEK. The contact stress on other UHMWPE compartments decreased in valgus and increased in varus, as compared to the neutral position. In CFR-PEEK, it increased in valgus and decreased in varus. The forces on medial collateral ligaments increased in valgus, when compared to the neutral position in UHMWPE and CFR-PEEK. The results indicate that UKR with UHMWPE showed positive biomechanical outputs under neutral and 3° varus conditions. UKR with CFR-PEEK showed positive biomechanical outputs for up to 6° varus alignments. The valgus alignment should be avoided.


Arthroplasty ◽  
2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Pei Liu ◽  
Fei-fan Lu ◽  
Guo-jie Liu ◽  
Xiao-hong Mu ◽  
Yong-qiang Sun ◽  
...  

Abstract Purpose Presented here is an up-to-date review concerning robotic-assisted unicompartmental knee arthroplasty (rUKA), including its rationale, operative system, pros and cons. Methods We did a systematic research in electronic databases, including PubMed, Cochrane Library, Web of Science, and Embase up to March 30, 2020 to retrieve literature pertaining to rUKA. The search strategies “(robotic* AND knee arthroplasty OR knee replacement)” and “(knee arthroplasty OR knee replacement NOT total)” were used. Studies describing rUKA and clinical trials, dry bone or cadaveric researches regarding technologies, positioning, alignment, function, or survivorship of implants were included in this review. All retrieved studies were first browsed for eligibility on the basis of title and abstract, and the selected studies were further evaluated by reading full text for final inclusion. Results Robotic-assisted technology has been found to increase the accuracy of bone preparation and implant placement, reduce technical variability and outliers, and enhance reproduction of limb alignment. Additionally, early clinical outcomes were excellent, but mid-term follow-up showed no superiority in component survivorship. The potential drawbacks of the robotic-assisted technology include relatively-low time- and cost-effectiveness, development of some rUKA-related complications, and lack of support by high-quality literature. Conclusion This review shows that rUKA can decrease the number of outliers concerning the optimal implant positioning and limb alignment. However, due to absence of extensive studies on clinical outcomes and long-term results, it remains unclear whether the improved component positioning translates to better clinical outcomes or long-term survivorship of the implant. Nevertheless, since an accurate implant position is presumably beneficial, robotic-assisted technology is worth recommendation in UKA.


2016 ◽  
Vol 136 (9) ◽  
pp. 1303-1307 ◽  
Author(s):  
Nael Hawi ◽  
Jochen Plutat ◽  
Daniel Kendoff ◽  
Eduardo M. Suero ◽  
Michael B. Cross ◽  
...  

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