scholarly journals New Instrumentation Reduces Operative Time in Medial Unicompartmental Knee Arthroplasty Using the Oxford Mobile Bearing Design

2015 ◽  
Vol 5 (4) ◽  
Author(s):  
Keith Berend ◽  
Jason Hurst ◽  
Michael Morris ◽  
Joanne Adams ◽  
Adolph Lombardi
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Operative Time ◽  
Mobile Bearing ◽  
Phase Iii ◽  
Unicompartmental Knee ◽  
Medial Unicompartmental Knee Arthroplasty ◽  
New Instrumentation ◽  
Time Savings ◽  
Bearing Design

Redesigned instrumentation has become available for implantation of the Oxford Mobile Bearing Medial unicompartmental knee arthroplasty. To assess the benefit of these changes, we compared operative time of 200 Phase III and 176 Microplasty UKA done 2008-2011. An average time savings of 8.6 minutes was seen with the Microplasty design.  Additionally, the standard deviation in operative times, minimum and maximum operatives were lower in knees in which Microplasty instrumentation was utilized.  A 15% savings in operative time was seen with the new Microplasty instrumentation. 

Does new instrumentation improve radiologic alignment of the Oxford® medial unicompartmental knee arthroplasty?

The Knee ◽  
2017 ◽  
Vol 24 (3) ◽  
pp. 641-650 ◽  
Author(s):  
Ki-Mo Jang ◽  
Hong Chul Lim ◽  
Seung-Beom Han ◽  
Chandong Jeong ◽  
Seul-Gi Kim ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Unicompartmental Knee ◽  
Medial Unicompartmental Knee Arthroplasty ◽  
New Instrumentation

scholarly journals Potential factors in postoperative dislocation of Oxford phase III mobile bearing UKA in Chinese patients: a single-center retrospective study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Chenkai Li ◽  
Tao Li ◽  
Zian Zhang ◽  
Hui Huang ◽  
Tian Chen ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Knee Flexion ◽  
Mobile Bearing ◽  
Phase Iii ◽  
Chinese Patients ◽  
Surgical Volume ◽  
Unicompartmental Knee ◽  
Volume Group ◽  
Bearing Dislocation

Abstract Background Bearing dislocation is the main complication after mobile bearing unicompartmental knee arthroplasty. The purpose of this study was to analyze the potential risk factors of bearing dislocation after Oxford phase III mobile bearing unicompartmental knee arthroplasty in Chinese patients. Methods We retrospectively investigated 492 patients (578 knees) who underwent Oxford phase III mobile bearing unicompartmental knee arthroplasty in our institution between February 2009 and June 2019. The patients were divided into two groups based on surgeons’ annual surgical volume. Those with/ without bearing dislocation were compared based on patient, surgeon and implant factors. Results Among the 492 patients, 21 (4.3%, 4 men and 17 women) experienced bearing dislocation. Of these, 14 (4.0%) were in the high surgical volume group and 7 (5.1%) were in the low surgical volume group. Multivariate analysis revealed that trauma to the operated leg and daily life involving high knee flexion cumulatively predicted bearing dislocation (p < 0.05). Conclusions Trauma to the operated leg and daily life involving high knee flexion were risk factors for bearing dislocation after Oxford phase III mobile bearing unicompartmental knee arthroplasty.

scholarly journals Mobile Versus Fixed Bearing Medial Unicompartmental Knee Arthroplasty: A Series of 375 Patients

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Robert Murphy ◽  
Tyler Fraser ◽  
William Mihalko
Keyword(s):  
Range Of Motion ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Mobile Bearing ◽  
Lateral Compartment ◽  
Fixed Bearing ◽  
Unicompartmental Knee ◽  
Significant Difference ◽  
Medial Unicompartmental Knee Arthroplasty ◽  
Component Loosening

Introduction: We sought to compare outcomes, complications and survival between mobile and fixed bearing medial unicompartmental knee arthroplasty (UKA) in a large multi-surgeon group.Methods: Medical records of patients who underwent a medial UKA were queried between March 2003 and August 2012. Variables investigated included final range of motion (ROM), type of complication, and overall survivorship. Results: 375 medial UKAs were analyzed (308 mobile bearing and 67 fixed bearing). Average time to follow-up was 47 months. Final ROM was comparable (mobile: 1-122°, fixed: 1-120°, p = 0.34). Complications occurred in 20/308 (6.6%) mobile bearing UKA and 5/67 (7.5%) fixed bearing UKA (p = 0.77). The most common complications in mobile bearing implants were progression of lateral compartment disease and component loosening. The complications in fixed bearing implants were arthrofibrosis and tibial plateau fracture. Overall survivorship differed, but not significantly (mobile: 94.8%, fixed: 96.9%, p = 0.44). Discussion: In this largest reported cohort series comparing mobile versus fixed bearing UKA, we found no significant difference in final clinical knee range of motion, rates of complications, and survivorship between the two bearing types. 

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