Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation

doi:10.1016/S1672-6529(11)60142-X

J4 ›› 2012, Vol. 9 ›› Issue (4): 501-507.doi: 10.1016/S1672-6529(11)60142-X

Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation

Khaled Gammoudi^{1, 2}, Mohamed Kharrat^{1, 3}, Maher Dammak^{1, 4}

1. National Engineering School of Sfax, Electromechanical Systems Laboratory, Soukra road km 3.5,
B.P. 1173, 3038 Sfax, Tunisia
2. Higher Institute of Technological Studies of Gafsa, University campus Sidi Ahmed Zarrouk, 2112 Gafsa, Tunisia
3. Faculty of Sciences of Gafsa, University campus Sidi Ahmed Zarrouk, 2112 Gafsa, Tunisia
4. Preparatory Institute for Engineering Studies of Sfax, Menzel Chaker Road Km 0.5, B.P. 1172, 3018 Sfax, Tunisia

出版日期:2012-12-30
通讯作者: Mohamed Kharrat E-mail:mohamed.kharrat@ipeis.rnu.tn

Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation

Khaled Gammoudi^{1, 2}, Mohamed Kharrat^{1, 3}, Maher Dammak^{1, 4}

1. National Engineering School of Sfax, Electromechanical Systems Laboratory, Soukra road km 3.5,
B.P. 1173, 3038 Sfax, Tunisia
2. Higher Institute of Technological Studies of Gafsa, University campus Sidi Ahmed Zarrouk, 2112 Gafsa, Tunisia
3. Faculty of Sciences of Gafsa, University campus Sidi Ahmed Zarrouk, 2112 Gafsa, Tunisia
4. Preparatory Institute for Engineering Studies of Sfax, Menzel Chaker Road Km 0.5, B.P. 1172, 3018 Sfax, Tunisia

Online:2012-12-30
Contact: Mohamed Kharrat E-mail:mohamed.kharrat@ipeis.rnu.tn

摘要/Abstract

摘要：

Effect of initial interference fit on pull-out strength in cementless fixation between bovine tibia and smooth stainless steel post was investigated in this study. Compressive behavior of bovine spongious bone was studied using mechanical testing in order to evaluate the elastic-plastic properties in different regions of the proximal tibia. Friction tests were carried out in the aim to evaluate the friction behavior of the contact between bovine spongious bone and stainless steel. A cylindrical stainless steel post inserted in a pre-drilled bovine tibia with an initial interference fit was taken as an in vitro model to assess the contribution of post fixation to the initial stability of the Total Knee Arthroplasty (TKA) tibial component. Pull-out experiments were carried out for different initial interference fits. Finite Element Models (FEM) using local elastic-plastic properties of the bovine bone were developed for the analysis of the experimental ultimate pull-out force results. At the post/bone interface, Coulomb friction was considered in the FEM calculations with pressure-dependent friction coefficient. It was found that the FEM results of the ultimate force are in good agreement with the experimental results. The analysis of the FEM interfacial stresses indicates that the micro-slip initiation depends on the local bone properties.

关键词: total knee arthroplasty, bovine bone/steel post fixation, interference fit, pull-out strength, FEM

Abstract:

Key words: total knee arthroplasty, bovine bone/steel post fixation, interference fit, pull-out strength, FEM

Khaled Gammoudi, Mohamed Kharrat, Maher Dammak. Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation[J]. J4, 2012, 9(4): 501-507.

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Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation

Experimental and Numerical Analyses of the Pull-out Response of a Steel Post/Bovine Bone Cementless Fixation

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