Aseptic loosening of the artificial hip joint occurs frequently and causes thigh pains. Consequently,revision surgery is needed to replace it with a new implant. One of the major causes of its aseptic loosening is osteolysis of the surrounding bone tissue adjacent to the articular surfaces of the prosthetic joint as a direct consequence of the bone reaction to the wear particles. The purpose of this paper, is to review theoretical and experimental studies of the soft layer artificial hip joints the present author has conducted extensively over the past few years. The major advantage of the soft layer artificial hip joint over its conventional counterparts is its superior frictional,lubrication and wear properties. This new technology largely overcomes the problem of the aseptic loosening due to the wear particles and.hence, should have important clinical implications.