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Study on Computer Aided Design of Ni-Ti Shape Memory Alloy Stemless Femoral Prosthesis

Author: LiuFeng
Tutor: LinYueQiu；RuanMo
School: Kunming Medical College
Course: Surgery
Keywords: Computer-aided design Nitinol Stemless femoral prosthesis Biomechanics Finite Element Analysis
CLC: R687.3
Type: Master's thesis
Year: 2009
Downloads: 26
Quote: 0
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Abstract


[Objective] To study the use of computer-aided design technology designed nitinol the sessile hip prosthesis , and evaluation of a new type of memory alloy stemless hip prosthesis biomechanical properties . Propose a new design ideas for the the sessile hip prosthesis design . 【 】 Adult femur spiral CT scan image using CAD (computer aided design ) software to create three-dimensional solid model of the femur and to design the new nitinol sessile hip prosthesis , according to the morphology of the femur model . Using the finite element method to analyze the biomechanics of the hip joint prosthesis , respectively, to establish a three-dimensional femur model , traditional stem prosthesis and novel nitinol handle finite element model of the hip prosthesis . Von Mises stress distribution of various models under static load and gait load analysis and comparison . [Results] The use of CAD technology designed nitinol stemless hip prosthesis , Von Mises stress distribution on its femur under static load and gait load close to the normal state femur . The nitinol prosthesis proximal femur sessile Von Mises stress is significantly greater than traditional stem prosthesis , similar to the normal state the femur . Memory alloy claws maximum Von Mises stress only 13.23Mpa, stress distribution more uniform stress concentration phenomenon . [Conclusion] ( 1 ) nitinol stemless femoral prosthesis has excellent biomechanical properties can effectively avoid the occurrence of stress shielding effect . ( 2 ) fixed nitinol claws way to achieve reliable fixed purpose of reducing the stress concentration phenomenon . ( 3 ) the use of CAD technology to design hip prosthesis has high efficiency , optimize foreseeable characteristics of the design effect .

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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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