The patented head design ensures that the entire extraction force is transmitted only along the center axis of the stem, eliminating those lateral forces, wich cause fracturing of the bone.
Under most extraction devices much of the extraction force is directed in undesired planes.
The FEM analysis clearly shows the comparison between the EPM MUELLER ® stem extractor and traditional extractors, where ewen at best, the force is only parrallel to the stem, thereby still exerciting lateral presure.
