Photoelastic investigation of mechanical problems in applying acetabulum cups to hip prosthesis

• Autorzy: Beer R. , Eberhardsteiner J. , Kodvani J. , Jecic S.
• Języki publikacji: EN

Abstrakty

EN

Acetabulum cups are the counterparts of endoprostheses, which are mounted in the pelvis. There are different designs of such cups. They differ in their form and in the way of mounting. This paper deals with the threaded acetabulum cups with conical shape mounted in the pelvis. In general, one has to distinguish between stresses caused by the mounting process and lifetime stresses of the mounted cup. Stresses remaining of the mounting must ensure the so-called primary stability; however, they will disappear to some degree due to rheological properties of bone. The question arises whether the mounting stresses are responsible for local plastic deformations and the corresponding residual stresses or not. In this paper, mostly loading stresses and their dependence on the contact properties between pelvis and cup or between cup and polyurethane inlay are considered.

Słowa kluczowe

EN

biomechanics; hip joint endoprosthesis; threaded acetabulum cup; photoelasticity

PL

staw biodrowy; biomechanika

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2006
• Tom: Vol. 8, nr 1
• Strony: 47--54
• Opis fizyczny: Bibliogr. 8 poz., rys., wykr.

Twórcy

autor

Beer R.

autor

Eberhardsteiner J.

autor

Kodvani J.

autor

Jecic S.

• Laboratory of Experimental Mechanics, University of Zagreb, Croatia

Bibliografia

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• [4] JECIC S., BEER R.J., KODVANJ J., FLEISCHMANN M., Shrinking of polymers in technical problems consisting of two different parts determined by 3D photoelasticity using gamma irradiation, Proceedings of the 17th IMEKO World Congress, Dubrovnik, 2003, pp. 1935–1938.
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• [6] WITZEL U., RIEGER W., EFFENBERGER H., Dreidimensionale Spannungsanalyse bei Schraubpfannen und ihren knöchernen Lagern, Schraubpfannen, State of the Art, Editor: Effenberger H., MCU, pp.77-86, 2004.
• [7] RHO J.Y., KUHN-SPEARING L., ZIOUPOS P., Mechanical properties and the hierarchical structure of bone, Med. Engineering & Physics, 1998, 20, pp. 92–102.
• [8] FROCHT M.M., Photoelasticity, Vol. II, John Wiley & Sons Inc., New York, 1949.