Intra-osseous implant

摘要

The invention relates to an intra-osseous implant for placement in bone of a human or animal body comprising at least one intra-osseous part intended for placement in said bone tissue having an apical side and a cervical side and composed of a body friendly material, which part is provided on its circumferential surface with a thread running in the direction of the apical end; and a support part present at said cervical side of said at least one intra-osseous part intended for supporting a prosthetic element. The invention aims to provide a medical intra-osseous implant and especially a dental intra-osseous implant, which allows an accurate implant position at a desired depth into bone tissue, providing without losing a high degree of primary implant stability. To this end according to the invention the intra-osseous part is provided with one or more grooves extending in longitudinal direction and interrupting the screw thread into multiple interrupted screw thread parts, said multiple interrupted screw thread parts serving as retention elements allowing the placement of the implant in longitudinal direction into said bone tissue but preventing the removal of the implant in opposite longitudinal direction out of said bone. The invention can also be describes as an intra-osseous implant with along its circumferential surface several rows of retention elements situated in a longitudinal formation. At the same time these retention elements are situated in a screw thread configuration.

主权项

1. An intra-osseous implant for placement in bone of a human or animal body comprising at least one intra-osseous part intended for placement in bone tissue having an apical side and a cervical side and composed of a body friendly material, which intra-osseous part having a circumferential surface provided with a screw thread running in the direction of and ending at the apical side; and a support part present at said cervical side of said at least one intra-osseous part intended for supporting a prosthetic element, characterized in that the intra-osseous part is provided with multiple grooves extending in longitudinal direction and over the entire length of the intra-osseous part, interrupting the screw thread into longitudinally extending rows of multiple interrupted screw thread parts, said longitudinally extending rows of multiple interrupted screw thread parts forming adjacent rows oriented parallel to the axis of the implant, said multiple interrupted screw thread parts comprising retention elements functioning as shark teeth, the shark teeth functioning retention elements allowing the placement of the implant in longitudinal direction into said bone tissue but preventing the removal of the implant in opposite longitudinal direction out of said bone, the shark teeth functioning retention elements being wider at a bottom proximate the circumferential surface and narrower at an end outwardly spaced from the circumferential surface, said shark teeth functioning retention elements having a profile extending from the circumferential surface of the intra-osseous part, said profile having a face on the cervical side and a face on the apical side, said face on the apical side exhibiting a shallow angled slope relative to the circumferential surface of the intra-osseous part and the face on the cervical side being substantially perpendicular relative to the circumferential surface of the intra-osseous part, such that said shark teeth retention elements hook into the surrounding bone tissue.