Patent ID: 7699612

Claim:
A dental implant fixing member, which is adapted to be inserted in an alveolar bone or a gnathic bone, said fixing member comprising: a tube made of a hydroxyapatite ceramic, wherein at least a portion thereof is porous, the tube: (i) consisting essentially of a hydroxyapatite formed by agitation foaming, in which tube a number of approximately spherical pores mutually contact, open at the contact area, and communicate three-dimensionally; and (ii) having an average porosity of from 65% to 85%, an average pore diameter of between 150 μm and 600 μm, an average opening diameter of the three-dimensionally communicated pores at the contact area of at least 30 μm; and a pillar which is a ceramic porous article consisting essentially of a hydroxyapatite formed by agitation foaming, in which pillar a plurality of approximately spherical pores mutually contact, open at the contact area, and communicate three-dimensionally, wherein the average porosity of the pillar is greater than the average porosity of the tube, wherein the pillar is disposed inside the tube in a manner that a peripheral surface of the pillar is surrounded by at least 70% of the tube, and wherein a cavity is provided in the fixing member so as to fix the implant therein.