{"title":"STAND FOR TRIBOLOGICAL STUDIES OF HIP JOINT\u0000ENDOPROSTHESIS WITH THE POSSIBILITY OF CHANGING\u0000ACETABULUM ANTEVERSION ANGLE AND HEAD ANTI TORSION\u0000ANGLE","authors":"T. Wiśniewski, M. Libera, Ł. Łapaj","doi":"10.5604/01.3001.0016.1618","DOIUrl":"https://doi.org/10.5604/01.3001.0016.1618","url":null,"abstract":"The article presents the construction of a hip joint movement simulator intended for friction and wear studies\u0000of hip joint endoprostheses. The simulator's design enables the fixing of hip endoprosthesis components\u0000in accordance with the anatomical structure of the human hip joint. The endoprosthesis head is mounted\u0000on a special base in the lower position with a neck-shaft angle of 135°, while the acetabular cup of the\u0000endoprosthesis is mounted in the upper part of the mounting head with an inclination angle of 45°. The\u0000production of three heads (responsible for the anteversion angle of the acetabulum) and three special bases\u0000(responsible for the anti torsion angle of the head) with different fixing angles of the components of the hip\u0000joint endoprosthesis made it possible to carry out tribological tests with nine variants of alignment settings.\u0000The hip joint endoprosthesis tester is designed to simulate the following movements: flexion and extension,\u0000as well as loads occurring in the human hip joint while walking. Thanks to the use of control in the form of\u0000electronic cams, the simulator makes it possible to recreate the variable value of the force loading the friction\u0000pair as a function of the human walking cycle.\u0000The subject of friction and wear studies were hip joint endoprostheses with a head diameter of 44 mm, made\u0000of high-carbon Co28Cr6Mo alloy. For each of the nine variants of endoprosthesis component alignment\u0000settings, average friction coefficient values were calculated based on the recorded values of the friction\u0000torque. The results of the friction and wear studies employing the simulator confirm that the mutual angle\u0000alignment setting of the head and the cup has an impact on the value of the frictional resistance occurring in\u0000the tribological pair.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82271065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}