ARTIFICIAL JOINT, MEDICAL IMPLANT, AND METHODS OF PRODUCING THE ARTIFICIAL JOINT AND MEDICAL IMPLANT

摘要

In an artificial joint, bone cells at a join portion where the artificial joint and a bone are joined grow and sufficiently penetrate in the surface of the artificial joint. This makes the join at projections and depressions formed at the join portion very solid. The artificial joint is characterized in that the surface of a stem portion in contact with the bone has projections and depressions formed by grooves. The grooves may be formed by a laser beam.