کاهش سپر تنشی در استخوان ران با استفاده از پروتزهای ران ساخته شده از مواد توزیع شده تابعی

نوع مقاله : مقاله پژوهشی

نویسندگان

• هستیار جلیل زاده
• اکبر الهوردی زاده
• بهنام داداش زاده

گروه مهندسی مکاترونیک، دانشگاه تبریز، تبریز، ایران

10.22067/jacsm.2024.85554.1218

چکیده

تعویض کامل مفصل ران دارای مشکلاتی است که یکی از مهمترین آن، پدیدة سپر تنشی و ضعف رشد استخوان است. وقتی مدول الاستیسیته پروتز بالاتر از استخوان باشد، بیشتر بار فیزیولوژیکی به ایمپلنت منتقل می‌شود و استخوان تحلیل می‌رود. راه‌حل به حداقل رساندن آن و تقویت رشد استخوان، استفاده از مواد با مدول الاستیسیتة نزدیک به استخوان برای پروتز است و مواد توزیع شدة تابعی دارای تخلخل نتایج بهتری را نسبت به مواد دیگر نشان داده‌اند. در این مقاله از مدل استوانه و پروتز بر اساس ISO 7206-4 و مدل پروتز و استخوان استفاده شده و با روش اجزاء محدود تحلیل و نتایج تنش‌های وارده، سفتی پروتزها و ریزحرکت‌های بین پروتز و استخوان بررسی شده است. برتری این مطالعه نسبت به پژوهش‌های قبلی استفاده از مدل پروتز و استوانه برای هندسه‌های مختلف و بررسی ریزحرکت‌ها و تأثیر آن در رشد استخوان می باشد. نتایج نشان می دهد که استفاده از پروتزهای FGM متخلخل برای هر هندسة پروتز متفاوت در کاهش سپر تنشی و رشد استخوان موثر می باشد.

کلیدواژه‌ها

• پروتز ران
• مواد توزیع شده تابعی
• تخلخل
• سپر تنشی
• روش اجزا محدود
• ریزحرکت

موضوعات

• مهندسی پزشکی

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عنوان مقاله [English]

Reducing the stress shield in the femur using hip prostheses made of functionally graded materials

نویسندگان [English]

• Hastyar Jalilzadeh
• Akbar Allahverdizadeh
• Behnam Dadashzadeh

University of Tabriz

چکیده [English]

Total hip joint replacement has problems, one of the most important of which is the stress shield phenomenon and weak bone growth. When the modulus of elasticity of the prosthesis is higher than that of the bone, most of the physiological load is transferred to the implant and the bone deteriorates. The solution to minimize it and strengthen bone growth is to use materials with elasticity modulus close to bone for prosthesis, and functionally graded materials (FGM) with porosity have shown better results than other materials. In this article, the model of cylinder and prosthesis based on ISO 7206-4 and the model of prosthesis and bone are used, and the results of applied stresses, stiffness of prostheses, and micromovements between prosthesis and bone are analyzed by the finite element method. The superiority of this study compared to previous studies is the use of prosthetic and cylinder models for different geometries and the investigation of micromovements and its effect on bone growth. The results show that the use of porous FGM prostheses for each different prosthesis geometry is effective in reducing the stress shield and bone growth.

کلیدواژه‌ها [English]

• Femoral prosthesis
• functionally graded materials
• porosity
• stress shielding
• finite element method
• micromotion

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