Prosthetic joint with at least one diamond coated interface

(57) -- the prosthetic dentistry joint (108, 130) equipped with the border plane (150, 158) covered with the summary polycrystal diamond fabrication object, and this prosthetic dentistry joint -- a production method is an indication -- now, it is. A prosthetic dentistry joint (108, 130) has the diamond layer (150, 158) formed in at least 1 side of the load bearing side which acts mutually. Since this diamond layer (150, 158) makes low the coefficient of friction of a prosthetic dentistry joint the increase of tolerance over the damage received from a shock, and also when being ground, the life of this prosthetic dentistry joint (108, 130) becomes long. If based on an aspect with the present invention, the diamond layer consists of polycrystal diamond fabrication objects which have an equal diameter of 1 micrometer or less, in order to make friction reduce further.