نوع مقاله: مقاله کامل پژوهشی

نویسنده

استادیار گروه مهندسی بافت و علوم سلولی کاربردی، دانشکده پزشکی، دانشگاه علوم پزشکی سمنان، سمنان، ایران

10.22041/ijbme.2017.53697.1170

چکیده

پروتز‌های زانو، به‌عنوان یکی از محصولات پزشکی برای عملکرد مطلوب در دراز‌مدت (عدم شل‌شدگی و جراحی مجدد)، هنوز نیازمند راهکارهای طراحی هستند. در مطالعة حاضر، طرح کسر عاملی کامل از طراحی آزمایشات، به همراه تحلیل المان محدود، استفاده شد تا اثر شکل داخلی قطعة فمورال پروتز زانو بر پایداری مکانیکی ایمپلنت و تنش‌های بیومکانیکی ایجاد‌شده در خود ایمپلنت، سیمان استخوانی و استخوان مجاور، بررسی شود. سپس از روش واسپاس، که یکی از روش‌های انتخاب چند‌شاخصه است، برای رتبه‌بندی طرح‌ها استفاده شد. نتایج تحلیل واریانس، نشان داد که هندسة شکل داخلی قطعة فمورال بر عملکرد پروتز زانو اثر‌گذار است؛ به‌طوری‌که از میان عوامل در‌نظر‌گرفته شده، زاویة بین برش‌های پایینی و جلویی، زاویة بین برش‌های پایینی و پشتی و همچنین ضخامت سیمان استخوان، به‌عنوان تأثیر‌گذارترین عوامل شناسایی شدند. به‌علاوه  با تحلیل آماری، مدل ریاضی پیش‌بینی کنندة مربوط به هر‌یک از معیارهای سنجش عملکرد نیز برآورد شدند. نتایج رتبه‌بندی و تحلیل حساسیت نشان داد، که طرح‌های برتر اغلب لایة ضخیم‌تری از سیمان دارند. این مطالعه همچنین نشان داد که هندسة فعلی قطعة فمورال، بهترین طرح نیست و اصلاح آن، می‌تواند عملکرد پروتز را در بلند‌مدت بهبود دهد.
 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Femoral Component Interface Design on Biomechanical Performance of Knee Prosthesis

نویسنده [English]

  • Marjan Bahraminasab

Assisstant Professor, Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran

چکیده [English]

Knee implants still lacks sufficient design solutions to ensure improved long term performance without aseptic loosening and the subsequent revision surgery.The present paper, used full factorial design of experiment (DOE) method along with finite element analysis (FEA) to assess the influence of internal contours of femoral component on mechanical stability of the prosthesis, and the biomechanical stresses experienced by the femoral component, bone cement and the adjoining bone with preservation of the external contours.The WASPAS approach, as a multi criteria decision analysis (MCDA) technique, was then used to rank the alternative designs. The results of analysis of variance showed that the internal shape of femoral component contours influenced the performance measureswhere the angle between the distal and anterior cuts, the angle between the distal and posterior cuts, and the cement thickness were highlysignificant. The predictive mathematical models of each performance measureswre also estimated through statistical analysis. The ranking order and the following sensitivity analysis revealed that the top designs mostly had higher cement thickness and the original design was not the top choice for femoral component which by improving the current designbetter long term performance can be achieved.
 

کلیدواژه‌ها [English]

  • Cemented knee implant
  • Interface geometry
  • Design of experiments
  • finite element analysis

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