Title :
Influence of Human Body Temperature on Compressive Mechanical Properties of UHMWPE Acetabular Cup Material
Author :
Zheng, Xiao-Wen ; Meng, Hui-Rong
Author_Institution :
Sch. of Mech., China Univ. of Min. & Technol. (Beijing), Beijing
Abstract :
The tests of the compressive mechanical properties of ultra high molecular weight polyethylene (UHMWPE) acetabular cup material were carried out under the simulating human body temperatures and the variable loads in human natural walking cycle. Compared with the values at the room temperature 22degC, the yield stresses of UHMWPE at human body temperatures 37degC and 40degC decreased by 23.1% and 31.9%, respectively. And higher temperature caused larger compression strain and lesser deformation recovery. It can be concluded that human body temperature may accelerate the failure of UHMWPE prosthesis and that the strong influence of human body temperature on the mechanical properties of UHMWPE should be considered. The experimental study provides some basic data and references for UHMWPE prosthesis used in human body.
Keywords :
biomechanics; biomedical materials; biothermics; polymers; yield stress; UHMWPE acetabular cup material; UHMWPE prosthesis; compressive mechanical properties; human body temperature; temperature 22 C; temperature 37 C; temperature 40 C; ultra high molecular weight polyethylene; yield stresses; Biological system modeling; Capacitive sensors; Compressive stress; Humans; Legged locomotion; Materials testing; Mechanical factors; Polyethylene; Prosthetics; Temperature;
Conference_Titel :
Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1747-6
Electronic_ISBN :
978-1-4244-1748-3
DOI :
10.1109/ICBBE.2008.780
