Photoelastic investigation of mechanical problems in applying acetabulum cups to hip prosthesis Acta of Bioengineering and BiomechanicsVol. 8, No. 1, 2006 JANOŠ KODVANJ, STJEPAN JECILaboratory of Experimental Mechanics, University of Zagreb, CroatiaRUDOLF BEER, JOSEF EBERHARDSTEINERInstitute for Mechanics of Materials and Structures, Vienna University of Technology, Austria Acetabulum cups are the counterparts of endoprostheses, which are mounted in the pelvis. There aredifferent designs of such cups. They differ in their form and in the way of mounting. This paper dealswith the threaded acetabulum cups with conical shape mounted in the pelvis. In general, one has todistinguish 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 willdisappear to some degree due to rheological properties of bone.The question arises whether the mounting stresses are ...
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