Dental implant having a biocompatible surface

Dental implant comprising an elongated body provided with a surface composed of biocompatible material, the upper end of said body including a head provided with means of anchoring a superstructure to be supported by said implant, a shaft extending downwardly from the head, the exterior periphery of said shaft having stepped surfaces generally perpendicular to the axis of the shaft and of progressively decreasing mean diameter and successive peripheral surfaces of the shaft also having progressively decreasing cross-sections as the lower end of the shaft is approached, the cross-section at the upper end of each peripheral surface being at least equal to the cross-section at the lower end of the same peripheral surface, and the cross-section of each peripheral surface at its lower end being larger than the cross-section of the next lower peripheral surface, the difference between the last two mentioned cross-sections defining the adjacent stepped surface, whereby all of the stepped surfaces may lie in abutting contact with load-bearing bone tissue immediately upon implanatation.