scholarly journals Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

Lubricants ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 36
Author(s):  
Matúš Ranuša ◽  
Markus A. Wimmer ◽  
Spencer Fullam ◽  
Martin Vrbka ◽  
Ivan Křupka
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Computational Models ◽  
Gait Cycle ◽  
Knee Prosthesis ◽  
Shear Stresses ◽  
Cobalt Chromium ◽  
Joint Friction ◽  
The Coefficient Of Friction ◽  
Total Knee

Total knee arthroplasty is on the rise worldwide. Despite its success, revision surgeries are also increasing. According to the American Joint Replacement Registry 2020, 3.3% of revision surgeries are due to wear, and 24.2% are due to mechanical loosening. The combination of shear stresses and wear particles occurring at the bone/implant interface can lead to local osteolysis. Although the shear stresses are partially driven by joint friction, relatively little is known about the evolution of the coefficient of friction (CoF) during a gait cycle in total knee replacement. Here we describe the CoF during a gait cycle and investigate its association with kinematics (slide–roll-ratio), applied load, and relative velocity. The artificial knee was simulated by cobalt–chromium condyle on a flat ultra-high-molecular-weight polyethylene (UHMWPE) tibial plateau, lubricated by either water or proteinaceous solution. We found that the CoF is not a constant but fluctuates between the values close to 0 and 0.15. Cross-correlation suggested that this is primarily an effect of the slide–roll ratio and the contact pressure. There was no difference in the CoF between water and proteinaceous solution. Knowledge about the CoF behavior during a gait cycle will help to increase the accuracy of future computational models of total knee replacement.

Backside wear in total knee replacement: A new quantitative measurement method and a comparison of polished cobalt-chromium tibial trays with titanium tibial trays

Wear ◽  
2021 ◽  
Vol 466-467 ◽  
pp. 203552
Author(s):  
Steffen Braun ◽  
Maximilian Uhler ◽  
Therese Bormann ◽  
Stefan Schroeder ◽  
Sebastian Jaeger ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Measurement Method ◽  
Quantitative Measurement ◽  
Cobalt Chromium ◽  
Backside Wear ◽  
Total Knee

scholarly journals Postoperative Autologous Reinfusion in Total Knee Replacement

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
A. Crescibene ◽  
F. Martire ◽  
P. Gigliotti ◽  
A. Rende ◽  
M. Candela
Keyword(s):  
Blood Transfusion ◽  
Total Knee Replacement ◽  
Knee Replacement ◽  
Knee Prosthesis ◽  
Autologous Blood ◽  
Control Group ◽  
Homologous Blood ◽  
Transfusion Therapy ◽  
Prosthesis Replacement ◽  
Total Knee

Surgeries for total knee replacement (TKR) are increasing and in this context there is a need to develop new protocols for management and use of blood transfusion therapy. Autologous blood reduces the need for allogeneic blood transfusion and the aim of the present study was to verify the safety and the clinical efficacy. An observational retrospective study has been conducted on 124 patients, undergoing cemented total knee prosthesis replacement. Observed population was stratified into two groups: the first group received reinfusion of autologous blood collected in the postoperative surgery and the second group did not receive autologous blood reinfusion. Analysis of data shows that patients undergoing autologous blood reinfusion received less homologous blood bags (10.6% versus 30%; p=0.08) and reduced days of hospitalization (7.88 ± 0.7 days versus 8.96 ± 2.47 days for the control group; p=0.03). Microbiological tests were negative in all postoperatively salvaged and reinfused units. Our results emphasize the effectiveness of this procedure and have the characteristics of simplicity, low cost (€97.53 versus €103.79; p<0.01), and easy reproducibility. Use of autologous drainage system postoperatively is a procedure that allows reducing transfusion of homologous blood bags in patients undergoing TKR.

scholarly journals Twelve-Year Outcomes of an Oxinium Total Knee Replacement Compared with the Same Cobalt-Chromium Design

2017 ◽  
Vol 99 (4) ◽  
pp. 275-283 ◽  
Author(s):  
Christopher J. Vertullo ◽  
Peter L. Lewis ◽  
Stephen Graves ◽  
Lan Kelly ◽  
Michelle Lorimer ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Cobalt Chromium ◽  
Total Knee

A dynamic model of simulating stress distribution in the distal femur after total knee replacement

2007 ◽  
Vol 221 (8) ◽  
pp. 903-912 ◽  
Author(s):  
J F Shi ◽  
C J Wang ◽  
T Laoui ◽  
W Hart ◽  
R Hall
Keyword(s):  
Stress Distribution ◽  
Knee Joint ◽  
Total Knee Replacement ◽  
Dynamic Model ◽  
Knee Replacement ◽  
Distal Part ◽  
Distal Femur ◽  
Knee Prosthesis ◽  
Stress Shielding ◽  
Total Knee

The aim of this study has been to develop a dynamic model of the knee joint after total knee replacement (TKR) to analyse the stress distribution in the distal femur during daily activities. Using MSC/ADAMS and MSC/MARC software, a dynamic model of an implanted knee joint has been developed. This model consists of the components of the knee prosthesis as well as the bones and ligaments of the knee. The femur, tibia, fibula, and patella have been modelled as mixed cortico-cancellous bone. The distal part of femur has been modelled as a flexible body with springs used to simulate the ligaments positioned at their anatomical insertion points. With this dynamic model a gait cycle was simulated. Stress shielding was identified in the distal femur after TKR, which is consistent with other investigators' results. Interestingly, higher stresses were found in the bone adjacent to the femoral component peg. This dynamic model can now be used to analyse the stress distribution in the distal femur with different load conditions. This will help to improve implant designs and will allow comparison of prostheses from different manufacturers.

The Design of Total Knee Replacement Prosthesis Suitable for Anteroposterior Movement for Thai Female

2014 ◽  
Vol 931-932 ◽  
pp. 1122-1128
Author(s):  
Surasith Piyasin ◽  
Kriengkrai Nabudda ◽  
Suwipong Hemathulin
Keyword(s):  
Finite Elements ◽  
Stress Distribution ◽  
Total Knee Replacement ◽  
Knee Replacement ◽  
Distal Femur ◽  
Proximal Tibia ◽  
Knee Prosthesis ◽  
Total Knee Prosthesis ◽  
Thai Women ◽  
Total Knee

Nowadays, patients with osteoarthritis in Thailand are likely to increase in number every year. There are approximately 462,000 people and most are females than males. The treatment is surgery knee replacement implants which must be imported from abroad and cost is expensive.Total knee prosthesis used in Thailand would not fit with the body of the Thai women because of the design total knee prosthesis use anatomical data of Europe and designed for both male and female, which is different in the knee structure. This research aims to study the size and shape of knee for Thai women and design total knee replacement. The using of finite elements is to assist in the analysis which focuses on the influence of the force active on and the effects of stress distribution on the part of the knee at different stages of gait cycle. The results of the study can measure the average size of Thai knee women base on analytical data. Anthropometric data on the proximal tibia and distal femur of 55 female knees were obtained using three dimensional computer tomographic measurements. The parametric studies are dimension analysis of the femoral mediolateral (fML) and femoral anteroposterior (fAP) dimension on distal femur surface and tibial mediolateral (tML), tibial anteroposterior (tAP) on proximal tibia surface. The measuring average values are 65, 60, 67 and 45 mm respectively. All parameters were compared to the size of the total knee prosthesis which currently used in Thailand. It is found that values are 70, 62, 68 and 48 mm respectively which is larger than the average Thai woman.The study of finite elements can be made aware of the stress distribution and stress in the area of artificial knee while walking and leading to the design of artificial knee joint to have size and shape suitable for Thai women.

scholarly journals A comparative surface topographical analysis of explanted total knee replacement prostheses: Oxidised zirconium vs cobalt chromium femoral components

2017 ◽  
Vol 50 ◽  
pp. 59-64 ◽  
Author(s):  
Emma Kennard ◽  
Susan C. Scholes ◽  
Raghavendra Sidaginamale ◽  
Rajkumar Gangadharan ◽  
David J. Weir ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Cobalt Chromium ◽  
Total Knee ◽  
Topographical Analysis
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