Finite element analysis for the biomechanical effect of tibial insert materials in total knee arthroplasty

2018 ◽  
Vol 201 ◽  
pp. 141-150 ◽  
Author(s):  
Kyoung-Tak Kang ◽  
Juhyun Son ◽  
Sae Kwang Kwon ◽  
Oh-Ryong Kwon ◽  
Joon-Hee Park ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Element Analysis ◽  
Tibial Insert ◽  
Total Knee ◽  
Biomechanical Effect

scholarly journals The Effect of Malrotation of Tibial Component of Total Knee Arthroplasty on Tibial Insert during High Flexion Using a Finite Element Analysis

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Kei Osano ◽  
Ryuji Nagamine ◽  
Mitsugu Todo ◽  
Makoto Kawasaki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Soft Tissues ◽  
Element Analysis ◽  
High Flexion ◽  
Tibial Insert ◽  
Total Knee

One of the most common errors of total knee arthroplasty procedure is a malrotation of tibial component. The stress on tibial insert is closely related to polyethylene failure. The objective of this study is to analyze the effect of malrotation of tibial component for the stress on tibial insert during high flexion using a finite element analysis. We used Stryker NRG PS for analysis. Three different initial conditions of tibial component including normal, 15° internal malrotation, and 15° external malrotation were analyzed. The tibial insert made from ultra-high-molecular-weight polyethylene was assumed to be elastic-plastic while femoral and tibial metal components were assumed to be rigid. Four nonlinear springs attached to tibial component represented soft tissues around the knee. Vertical load was applied to femoral component which rotated from 0° to 135° while horizontal load along the anterior posterior axis was applied to tibial component during flexion. Maximum equivalent stresses on the surface were analyzed. Internal malrotation caused the highest stress which arose up to 160% of normal position. External malrotation also caused higher stress. Implanting prosthesis in correct position is important for reducing the risk of abnormal wear and failure.

Finite Element Analysis of the Influence of Cement Viscosity on Cement Mantle in Total Knee Arthroplasty

2010 ◽  
Author(s):  
Eric Rohrs ◽  
Manish Paliwal ◽  
D. Gordon Allan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Cement Mantle ◽  
Flow Profile ◽  
Total Stress ◽  
Element Analysis ◽  
Total Knee ◽  
Sliding Distance

Aseptic loosening of the tibial implant is one of the major reasons of failure in Total Knee Arthroplasty (TKA). The cement viscosity at the time of application to the bone influences the cement penetration and stability of the prosthesis. Four cements of different viscosities and set times were selected for analysis (Simplex-P, DePuy-2, Palacos, and Endurance). Finite element analysis was used to model cement flow and cement mantle resulting from a surgically implanted tibial plate into sawbone open cell blocks simulating tibial cancellous bone (Pacific Research, WA). Frictional stress, pressure, sliding distance, and total stress at the bone-cement-stem interface were studied at the contact interfaces, which may contribute towards construct stability. Palacos had the maximum interface pressure, sliding distance, and total stress, while DePuy-2 displayed the lowest total stress and sliding distance at interface. Simulated flow profile correlated well with the cemented constructs’ radiographic profiles.

scholarly journals Finite element analysis of the effect of tibial prosthesis extension stem length in total knee arthroplasty in the Chinese population

2019 ◽  
Author(s):  
Yeran Li ◽  
Yuhang Gao ◽  
Lu Ding ◽  
Chen Yang ◽  
Jinlong Wang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Relative Displacement ◽  
Chinese Patients ◽  
Stem Length ◽  
Element Analysis ◽  
Posterior Slope ◽  
Total Knee

Abstract BackgroundThis study aimed to determine the longest usable range of tibial prosthesis extension stems in Chinese patients undergoing primary total knee arthroplasty and to analyze the effect of different stem lengths on prosthesis stability within this range.MethodsWe conducted three-dimensional modeling and simulated surgery in patients with genu varum to measure the longest usable range of tibial prothesis stems, identify impinged cortices under tibial posterior slope cut of 0° and 3°, and analyze factors influencing the longest stem length. We built finite element models according to the longest usable range of extension stems to simulate tibial prostheses with different stem lengths, measure the stress distribution of tibias and prostheses and the relative displacement of distal ends of prostheses, and investigate the effect of different stem extension lengths on prosthesis stability.ResultsWe simulated osteotomy with a tibial posterior slope cut of 0° and 3°, under which the maximum tibial prosthesis stem length was 83 mm (79±24 mm). The simulated tibial cut with a tibial posterior slope of 3° indicated the maximum tibial prosthesis stem length to be 83 mm (83±20 mm). According to the longest usable range of extension stems, we defined five groups for finite element analysis with 40-mm, 50-mm, 60-mm, 70-mm, and 80-mm stem lengths and analyzed each group for posterior slopes of 0° and 3°. The 80-mm stem length models showed minimum relative displacement of the distal end of tibial prosthesis (0°: 2.63, 1.61±0.05 µm; 3°: 1.48, 1.44±0.09 µm), whereas the 40-mm stem length models showed maximum relative displacement (0°: 3.16, 3.19±0.12 µm; 3°: 1.84, 1.81±0.07 µm). As the length of tibial prosthesis stems increased from 40 to 70 mm, the relative displacement of the distal end of prosthesis decreased for both posterior slopes but was insignificant when stem lengths increased to 70–80 mm.ConclusionsBased on the results, we suggest that using the longest tibial stem is not always necessarily a better option to increase stability, as the prosthesis shows greater stability in only a specific range of increased length but shows insignificant change when the length is greatly increased.

scholarly journals A finite element analysis for predicting outcomes of cemented total knee arthroplasty

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
Nicolae Gheorghiu ◽  
Bogdan Socea ◽  
Mihai Dimitriu ◽  
Nicolae Bacalbasa ◽  
Gabriel Stan ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Element Analysis ◽  
Total Knee
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