Material and tribological problems occurring during the design and utilisation of hip endoprostheses

• Autorzy: Gierzyńska-Dolna M. , Więckowski W. , Wiśniewska-Weinert H.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main goal of research is determination of the influence of frictional pair „endoprosthesis head - acetabular cup” material on frictional resistance and endoprostheses wear, and the stress distribution in the elements of “bone-cement-implant” system. Design/methodology/approach: In the paper new development directions in endoprostheses are discussed with respect to construction of “head-acetabular cup” system and endoprosthesis stem, and proper material selection. The tests were carried out using dedicated simulator of the hip endoprosthesis. A quantitative and qualitative analysis of wear products was carried out. The numerical calculations of stress state in “bone-cement-implant” system were performed using ADINA System. Additionally the impact of incorrect endoprosthesis setting (jaw angle of the stem and cup) on frictional moment was determined experimentally. The stress distribution, in particular parts of “bone-cement-implant” system for selected endoprosthesis stem constructions, was presented. Findings: Both the numerical calculations and tests carried out on the hip endoprosthesis simulator gave us many valuable information on frictional resistance value, wear mechanism and durability of new endoprostheses constructions. Research limitations/implications: Preservation of geometrical, material and tribological similarity to the natural joints is of great significance in design of hip endoprostheses. Despite significant progress in material engineering not all similarity conditions were achieved. The replacement of a specific bone structure and natural joint with polyurethane insert and metal elements (stem, head of endoprosthesis), i.e. materials with much higher modulus of elasticity, cause the significant increase of the “bone-cement-implant” system rigidity. Frictional and wear processes occurring in the moveable system: “head-acetabular cup” and the resulting low endoprosthesis durability pose a serious problem. Practical implications: Future development of endoprostheses alloplasty is determined by the progress in biotribology, especially frictional and wear tests of endoprostheses. Originality/value: The tests were carried out using the hip endoprosthesis simulator, which reflects processes occurring in natural joint.

Słowa kluczowe

EN

hip endoprothesis; friction; wear; wear products; biomaterials; numerical simulation

PL

endoproteza stawu biodrowego; produkty zużycia; biomateriał; symulacja numeryczna; tarcie; zużycie

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2010
• Tom: Vol. 43, nr 1
• Strony: 222--227
• Opis fizyczny: Bibliogr. 18 poz., rys., tabl.

Twórcy

autor

Gierzyńska-Dolna M.

autor

Więckowski W.

autor

Wiśniewska-Weinert H.

• Metal Forming Institute, ul. Jana Pawła II 14, 61-139 Poznań, Poland,

Bibliografia

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