Derivation of Mathematical Model for Micromotion and Micro-Displacement at the Bone-Implant Interface Using Spring Analysis
Journal Title: Scholars Journal of Engineering and Technology - Year 2016, Vol 4, Issue 10
Abstract
Abstract:One of the major factors that determine the success of hip replacement is the primary stability which is the function of the micromotion on the bone-implant interface. Failure of hips replacement may arise from excessive motion at the implant-bone interface under the weight bearing loads. Minimizing the micromotion of the cementless prosthetic components is a key requirement for obtaining bone in-growth. If the initial movement is excessive, bone in-growth into the porous surface will not occur. Few experimental studies are available on implant micromotion largely due to difficulty of simulating loads in-vitro and in-vivo. Due to this reason, this research derived a theoretical model that relates the micro-velocity at which the implant moves down in the bone at the implant-bone surface at a specific time, the axial force applied on the head of the implant and the stiffness of the implants and the bones. The implant-bone interface (fibrous tissues) was taken as elastic surface that obeys Hooke’s law using spring analysis. Here, the displacement of the implant equals the micromotion depending on the stiffness of both cortical and trabecular (cancellous) bones. When the implant is axially loaded, due to the elastic modulus of the bone when compared to that of the implant (stainless steel), the deformation of the implant is neglected. That is, Ei >> (EC,ET) where Ei ,EC and ET are the elastic moduli of the implant, cortical part of the bone and the trabecular part of the bone respectively. Keywords:Cortical bone, Micromotion, Micro-displacement, Implant-bone interface, Spring stiffness.
Authors and Affiliations
Gabriel Oladeji Bolarinwa, Sam Nna Omenyi, Chinonso Hubert Achebe
Keywords
Related Articles
- EP ID EP385876
- DOI -
- Views 63
- Downloads 0
Study on Effect of Different Size Fraction Laterite Particles on Adsorption of Arsenic
The problem of environmental geotechnical engineering is the important problem that relates to the safety and the sustainable development of the geotechnical structure. This paper, studied the adsorption characteristics...
Review of Thermal Insulation Materials for Pipelines
Abstract:With the decreasing of energy around the world，The significance of energy-saving insulation in industrial and agricultural production and civil life become increasingly prominent. In order to reduce the heat lo...
The Application of Probability Statistics to Solving the Practical Problems
The probability statistics is the mathematical method researching the statistical law of the random phenomena in the natural world. With the development of the science and technology, the probability statistics knowledge...
Study on Stress Distribution of Casing under Different Elliptical Combinations
The study is based on the mechanical model of soil-cement ring-casing and uses the finite element software ANSYS. We select a certain combination of loads, study the situation of ideal round casing and ideal round cement...
Design of Information and Telecommunication Systems with Multi-Hour, Multiservice Traffic and Multilayer Graph Usage
At the current moment, despite the large number of publications in the direction of self-similar traffic studies, deficit of studies involving the use of models for the synthesis of multi-service telecommunication networ...