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Development of the Femoral Head Replacement Prosthesis

Author: GuHaiDong
Tutor: ZhangGuangYu
School: Harbin Institute of Technology
Course: Machinery and electronics
Keywords: the prosthesis of femoral head Ti6A14V stress-sheltered biomechanical analysis
CLC: R318.6
Type: Master's thesis
Year: 2008
Downloads: 35
Quote: 0
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To address the medical problems, in treatment of avascular necrosis of the femoral head(ANFH), about the loosening and subsidence of the prosthesis of femoral head, this paper develops a new prosthesis intended to transfer the force through femoral head while reducing stress-sheltered, based on growth characteristics of bones, biomechanical, the cause and treatment of ANFH. According to the characteristics of bone metabolism and the distribution of necrosis and living bone, this prosthesis of femoral head can not only bear the weight, but also reduce osteolysis, and promote bone growth.Ti6Al4V is choosed to make bracket which mainly bear the weight, while nickel-titanium alloy is determined to make support gabion, after comparing some implantation materials on mechanical properties, machining performance, biocompatibility and development trend.This paper calculates and gives forth the important machining parameters and description in order to imsve the quality and efficiency of machining. The prosthesis of femoral head is produced tentatively. It proves its machinablity, and offers test goods to next biomechanical simulation text.It also does a simplified three-dimensional model for biomechanical finite element analysis. It compares the displacement and stress of normal femoral head with the replaced femoral head in different gaits and proves that the replacement has sufficient strength to meet its basic function and the using of new materials and new structure of the prosthesis will reduce stress-sheltered, to achieve immediate and long-term stability.Finally, biomechanical text is simulated out-body to text strains on the neck of femoral head which is the weakest part of femor. It simulates the early and long-term after implantation with normal situation. And it proves that the replacement will not overrun the limitation of strains.This paper designs, produces and checks a new prosthesis of femoral head. And, it intergrates surgery, anatomy, biomechanical, science of materials and machining processing technology, uses finite element analysis and biomechanical simulation text. It does will provide new ideas for designing the femoral head replacement prosthesis.

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CLC: > Medicine, health > Basic Medical > Medical science in general > Biomedical Engineering > Apparatus, equipment
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