Cementless Isoelastic RM Prosthesis

Abstract

Using bone cement in hip surgery was introduced by John Charnley (1960) .
However, the loosening is still a major problem.
In 1973 the first isoelastic RM prosthesis without cement was inserted clinically.“Iso”means“equal”and so“isoelastic”means simply equal elasticity, and thus equal behavior, between the bone and implant, regardless of the original deformation behavior of the bone.
We report about our first experiences inserting an isoelastic RM prosthesis. We implanted the first cementless prosthesis in 1983.17 patients have been observed. We don't find loosening.