Preoperative uncorrectable tibiofemoral subluxation can worsen clinical outcomes after fixed-bearing unicompartmental knee arthroplasty: a retrospective analysis

2021 ◽  
Author(s):  
Tomoyuki Kamenaga ◽  
Naoki Nakano ◽  
Kazunari Ishida ◽  
Masanori Tsubosaka ◽  
Yuichi Kuroda ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Clinical Outcomes ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Fixed Bearing ◽  
Unicompartmental Knee ◽  
Tibiofemoral Subluxation

Central Implantation of the Femoral Component Relative to the Tibial Insert Improves Clinical Outcomes in Fixed-Bearing Unicompartmental Knee Arthroplasty

2020 ◽  
Vol 35 (11) ◽  
pp. 3108-3116 ◽  
Author(s):  
Tomoyuki Kamenaga ◽  
Koji Takayama ◽  
Kazunari Ishida ◽  
Shinya Hayashi ◽  
Ryosuke Kuroda ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Fixed Bearing ◽  
Unicompartmental Knee ◽  
Tibial Insert

The influence of obesity on clinical outcomes of fixed-bearing unicompartmental knee arthroplasty

2019 ◽  
Vol 101-B (2) ◽  
pp. 213-220 ◽  
Author(s):  
S. Xu ◽  
W-A. J. Lim ◽  
J. Y. Chen ◽  
N. N. Lo ◽  
S-L. Chia ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Obese Group ◽  
Physical Component Score ◽  
Control Group ◽  
Fixed Bearing ◽  
Unicompartmental Knee ◽  
Significant Difference ◽  
Functional Scores

Aims The aim of this study was to assess the influence of obesity on the clinical outcomes and survivorship ten years postoperatively in patients who underwent a fixed-bearing unicompartmental knee arthroplasty (UKA). Patients and Methods We prospectively followed 184 patients who underwent UKA between 2003 and 2007 for a minimum of ten years. A total of 142 patients with preoperative body mass index (BMI) of < 30 kg/m2 were in the control group (32 male, 110 female) and 42 patients with BMI of ≥ 30 kg/m2 were in the obese group (five male, 37 female). Pre- and postoperative range of movement (ROM), Knee Society Score (KSS), Oxford Knee Score (OKS), 36-Item Short-Form Health Survey (SF-36), and survivorship were analyzed. Results Patients in the obese group underwent UKA at a significantly younger mean age (56.5 years (sd 6.4)) than those in the control group (62.4 years (sd 7.8); p < 0.001). There was no significant difference in preoperative functional scores. However, those in the obese group had a significantly lower ROM (116° (sd 15°) vs 123° (sd 17°); p = 0.003). Both groups achieved significant improvement in outcome scores regardless of BMI, ten years postoperatively. All patients achieved the minimal clinically important difference (MCID) for OKS and KSS. Both groups also had high rates of satisfaction (96.3% in the control group and 97.5% in the obese group) and the fulfilment of expectations (94.9% in the control group and 95.0% in the obese group). Multiple linear regression showed a clear association between obesity and a lower OKS two years postoperatively and Knee Society Function Score (KSFS) ten years postoperatively. After applying propensity matching, obese patients had a significantly lower KSFS, OKS, and physical component score (PCS) ten years postoperatively. Seven patients underwent revision to total knee arthroplasty (TKA), two in the control group and five in the obese group, resulting in a mean rate of survival at ten years of 98.6% and 88.1%, respectively (p = 0.012). Conclusion Both groups had significant improvements in functional and quality-of-life scores postoperatively. However, obesity was a significant predictor of poorer improvement in clinical outcome and an increased rate of revision ten years postoperatively.

The effect of component alignment on clinical outcomes in fixed bearing unicompartmental knee arthroplasty

The Knee ◽  
2021 ◽  
Vol 29 ◽  
pp. 126-133
Author(s):  
James R. Gill ◽  
Lieven Vermuyten ◽  
Elizabeth Wastnedge ◽  
Paul Nicolai
Keyword(s):  
Clinical Outcomes ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Fixed Bearing ◽  
Component Alignment ◽  
Unicompartmental Knee
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