Abstract
A commonly-accepted concept about the fixation method for joint prostheses is that a wide contact area between bone and artificial materials results in lower pressure that is better for biological tissues. Another concept is that the load should be applied to the proximal femur together with the distal femur because proximal and distal fitting can avoid stress shielding of bone. However, these two concepts appear to contradict each other because the exact contact point cannot be determined in an apparent and wide contact area. We postulated that limited fixation with a narrow contact area could be better for the initial fixation of a stem.
