Patent attributes
The present invention relates to a dental implant fixture, and more particularly, to a dental implant fixture which rotates about a central axis thereof, and thus is inserted into a bone tissue constituted by a cortical bone and a spongy bone to form an artificial tooth root, wherein the dental implant fixture includes a first portion, a second portion, and a third portion. The first portion is inserted into the cortical bone and has an outer surface with a first screw thread whereon first vertices and first valleys are alternately arranged. The second portion is disposed beneath the first portion and inserted into the spongy bone, has an outer surface with a second screw thread whereon second vertices and second valleys are alternately arranged. The distance between the adjacent second vertices of the second screw thread is larger than the distance between the adjacent first vertices of the first screw thread. The third portion is disposed beneath the second portion, and has an outer surface with a third screw thread whereon third vertices and third valleys are alternately arranged, and a first cutting part which is hollowed such that the first cutting part is closer to the central axis than the third valleys. The lower outer diameter of the second screw thread is smaller than the upper outer diameter of the second screw thread.
