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Bone density under different biological and cementless femoral prosthesis after implantation of three-dimensional finite element analysis

Author: FanHongHui
Tutor: LiuJianGuo
School: Jilin University
Course: Surgery
Keywords: Finite Element Analysis Stress Femoral prosthesis BMD
CLC: R687.3
Type: Master's thesis
Year: 2005
Downloads: 110
Quote: 1
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Abstract


Total hip arthroplasty has been widely used in clinical practice to extend the effective life of the artificial joint research is the key to artificial joints, and stress distribution and aseptic loosening is the main factor affecting their life. Total hip arthroplasty femoral prosthesis selection of different types of the femoral prosthesis and stress distribution between the femoral canal and micro effects vary in different femur density under reasonable choice femoral prosthesis type, the femoral prosthesis the interface between the femoral stress distribution is more uniform and produce a smaller micro-to guide clinical practice has great practical significance. Patients for each one specially designed to improve the prosthesis and matching bone lesions and improve the long-term stability of the artificial joint, can effectively prevent the joints loose. The subjects of Solidwork software to build and cementless femoral prosthesis and biological three-dimensional model, with reference to the health center's bone mineral density multi-reference values ??around different ages femur bone mineral density differences to choose the overall stress distribution and initial Fretting smaller femoral prosthesis type, three-dimensional finite element analysis through comparative studies, which obtained a whole segment of bone mass more uniform stress distribution and initial micro small. Experimental results show that with decreased bone mineral density, bone cells per unit area increased load borne prosthesis - Femoral interface overall stress on the rise, but the femoral prosthesis does not change the overall stress pattern femur, implanted false bear most of the load on the body, appear at the end prosthesis stress increased stress concentration. Standard deviation of each group statistical analysis showed that: 1) both men and women standing on one foot stationary load, femoral prosthesis suffered mises stress, the maximum value of the interfacial stress are located in the end of the prosthesis. 2) with bone mineral density change, biological femoral prosthesis on the overall stress distribution in the male 30-40 age group (corresponding to the femur bone mean 0.851 ± 0.064g/cm2) relatively more uniform; among women 30-40 years of age group (corresponding to the femur bone mean 0.766 ± 0.08g/cm2) is relatively more uniform. 3) cementless femoral prosthesis on the overall stress distribution in the male 60-year-old group (corresponding to the femur bone mean of 0.7143 ± 0.078g/cm2) relatively more homogeneous group in women 50 years of age (corresponding to the femur bone average of 0.6963 ± 0.08g/cm2) relatively more uniform. 4) male 55 years of age, female

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CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
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