Running-in friction of hip joint replacements can be significantly reduced:The effect of surface-textured acetabular cup  

作　　者：David NECAS Hatsuhiko USAMI Tatsuya NIIMI Yoshinori SAWAE Ivan KRUPKA Martin HARTL 

机构地区：[1]Faculty of Mechanical Engineering,Brno University of Technology,Brno 61669,Czech Republic [2]Faculty of Science and Technology,Meijo University,Nagoya 468-8502,Japan [3]Kanefusa Corporation,Nagoya 480-0192,Japan [4]Faculty of Engineering,Kyushu University,Fukuoka 819-0395,Japan

出　　处：《Friction》2020年第6期1137-1152,共16页摩擦（英文版）

基　　金：The research was.carried out under the project JSPS/OF280,PE17046;with financial support from the Japan Society for the Promotion of Science.This research was also supported by the project FSI-S-17-4415;with financial support from the Ministry of Education,Youth and Sports of the Czech Republic(MEYS).

摘　　要：Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases.Despite the rapid improvement of implant materials over the last few decades,limited longevity associated with wear-related complications persists as the main drawback.Therefore,improved tribological perfor-mance is required in order to extend the service life of replacements.The effect of surface texturing of ultra-high molecular weight polyethylene(UHMWPE)acetabular cup was investigated in the present study.Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup.The experiments with four commercial femoral components and two model lubricants were realized.The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups.Results showed remarkable lowering of friction,in general.Focusing on the simulated human synovial fluid,friction was reduced by 40%(alumina ceramic),38.8%(zirconia toughened ceramic),25.5%(metal),and 9.9%(oxinium).In addition,the dimples helped to keep the friction stable without fluctuations.To conclude,the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan.It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.

关 键 词：hip joint replacement FRICTION TEXTURING DIMPLE LONGEVITY 

分 类 号：R687.4[医药卫生—骨科学] TQ325.12[医药卫生—外科学]