[Effects of inadequate cementing techniques on mechanical loading of bone cement]

Good, painfree and durable function of an endoprosthesis is highly dependent on its anchorage in the bony bed. Apart from the problem of mechanical loading of the prosthesis and the change in the strains in the cortical bone, stresses on the bone cement as a force-transmitting element, are of considerable importance. Inadequate cementing technique and resulting faulty cementing is a common cause of loosening of the endoprosthesis. The present article investigates the influence of inadequate cementing technique on the stress and strain conditions of bone cement, in particular at the distal end of the prosthesis.