Improvement and FEA of New Type of Osteointegrated Implant for Higher Amputated Leg Attachment

J.M. Luo; L. Zheng; X.H. Shi; Yao Wu; Xing Dong Zhang

doi:10.4028/www.scientific.net/KEM.342-343.829

Paper Titles

Effect of Solvent on the Characteristics of Electrospun Regenerated Silk Fibroin Nanofibers
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Preparation and Characterization of β-Tricalcium Phosphate Nanofibers via Electrospinning
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Occlusion Effect of Dentinal Tubules of the Dentifrice Containing Nano-Sized Carbonate Apatite
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Study of Protein Adsorption on Biomaterial Surfaces by SPR
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Improvement and FEA of New Type of Osteointegrated Implant for Higher Amputated Leg Attachment
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Investigation of Biomechanics Behavior in Unstable Pertrochanteric Fracture Treated with Three Typical Nails by FEA
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Biological Evaluation of Sirolimus-Loaded PLGA Films
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In Situ Investigation of Biomaterial Surfaces Using LDH and ELISA
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An Improvement in Shock Absorbing Behavior of Polyurethane Foam with a Negative Poisson Effect
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Improvement and FEA of New Type of Osteointegrated Implant for Higher Amputated Leg Attachment

Abstract:

Stress concentration is one of the main mechanical problems leading to the failure of clinical application for osteointegrated implant of percutaneous osteointegrated prosthesis, which is especially marked for higher amputated leg prosthesis. Traditionally design was composed of only the distal part. To improve the biomechanical safety, a new design with the lag part similar to the lag screw was introduced. Based on CT scan data, relatively accurate model of femur for finite element analysis (FEA) were obtained. The FEA results with the new implant demonstrated that compared to traditional design, the declination of bone stress peak ranged from 15.68% to 28.67%, perpendicular deformation from 34.73% to 72.16%, and maximal stress of implant from 14.51% to 23.36% with the increasing of loads from 3750N to 2000N. So the new design of osteointegrated implant would be more secure mechanically, in the case of higher amputated leg attachment.