Hip Joint Displacement

A total hip joint replacement usually composed of two main components articulating with one another, a polymeric acetabular cup against a metal or ceramic femoral head component [1]. Ultra-high molecular weight polyethylene (UHMWPE) is a key player in the total hip joint replacement as an acetabular cup since more than half a century, due to their unique properties such as high wear resistance, strength and modulus, excellent toughness, chemical resistance and impact, low moisture absorption, good wave transmission, and electrical insulation [2]. This does not preclude that there are many materials have been used for this purpose such as; polytetrafluoroethylene (PTEF), polyarylether ether ketone (PEEK), Polyethylene terephthalate (PET), polyoxymethylene
This is Because CNTs has unique properties such as high aspect ratio, lightweight, high mechanical strength, good thermal and electrical conductivity and excellent tribological behavior [21]. However, the results were not favorable due to the poor compatibility of POM with other materials as a result of high viscosity, especially with bulk materials [22]. Therefore, Yousef et al. (2013) develop a paraffin oil (PO) dispersion technique to obtain a uniform dispersion. The new dispersion technique summarized on adding a small amount of PO (2-3%Wt.) during the mixing process to decrease the viscosity of POM during the injection process then obtain a uniform dispersion of CNTs inside the matrix [23]. Through the new dispersion technique, Yousef et al. (2015) succeed to produce a real CNTs/POM bulk products had a uniform dispersion, in particular, spur, helical, bevel, and worm gears [24]. The results showed that the new dispersion technique has been successfully utilized to increase the wear resistance of POM by adding 0.02 wt. % of POM by 35% when compared by virgin