Design of Titanium Alloy Femoral Stem Cellular Structure for Stress Shielding and Stem Stability: Computational Analysis

Applied Sciences

Faris Tarlochan¹  Naser Fawzi Al Zoubi¹  Hassan Mehboob²  Firas Jarrar³ 

[1] Department for Mechanical and Industrial Engineering, Qatar University, Doha 2713, Qatar;Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh 11586, Saudi Arabia;Department of Mechanical Engineering, College of Engineering, Khalifa University, Abu Dhabi 127788, United Arab Emirates;

关键词: stem design;    implants;    hip replacement;    femur bone;    total hip arthroplasty;    computational analysis;   

DOI  :  10.3390/app12031548

来源: DOAJ

【 摘 要 】

The main objective of this study is to design titanium alloy femoral stems with cubic porous structures that will be able to reduce stress shielding and promote stem stability. These porous structure designs were introduced into titanium alloy femoral stems as homogeneous and functionally graded porous structures. First, the cubic cellular structures were simulated under compressive loading to measure the yield and modulus of elasticity for various porosity ranges. Based on the selected porosity range, fifteen different arrangements of radial geometrical functionally graded (FG) designs were developed with average porosities of 30, 50, and 70% respectively. Finite element models were developed with physiological loads presenting three different walking speeds (1, 3, and 5 km/h), where the average human body weight was assumed. Stresses at the bone Gruen zones were measured to check the percentage of stress transfer to the bone for each porous stem design and were compared with the bulk stem. Several FG stem designs were shortlisted for further investigation as candidates for hip implants.

【 授权许可】

Unknown