EP0237505A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Anchoring member for permanent anchorage in bone tissue
Assignee: Institute for Applied Biotechnology
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Filing: 1987-02-11
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Granted: —
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Expires: 2007-02-11
Abstract
Abstract The invention relates to a screw-shaped titanium anchor- . ing member for permanent anchorage in bone tissue, specifically permanent anchorage of articial teeth and tooth bridges in the jaw bone. The bottom end of the anchoring member is provided with at least one cavity (4, 8) communicating only with the outer cylindrical surface of the anchoring member, and the edge of the cavities on the cylindrical surface forming sharp, cutting edges (5, 10) for self-tapping when the anchoring member is screwed into the bone tissue, said cavities also adapted to room all the scraped-off bone tissue material by the cutting edges (5).
Inventors
- 👤 Lars Jörnéus
- 👤 Kjell Olof Hagberg
- 👤 Lennart Lööf
- 👤 Einar Jörgensen
- 👤 Per-Ingvar Branemark
- 👤 Carl Arne Morenius
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:09
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61C8/0024
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
Screw-shaped titanium anchoring member for parmanent anchorage in bone tissue specifically permanent anchorage of artificial teeth or tooth bridges in the jaw-bone, comprising at least one cavity directly communicating with the outer, cylindrical surface of the anchoring member to allow newly formed bone tissue to grow into said cavity characterized in that the edges (5, 10) of said cavities (4, 8) on the outer cylindrical surface are forming cutting edges to provide self-tapping when the anchoring member is screwed into the bone tissue, that said cavities are communicating only with the outer cylindrical surface, that the total volume of the cavities is adapted to contain the scraped-off bone tissue material and that the bottom end surface 6 is unbroken in order to avoid unintentional penetration of the bone membrane.
Claim 2
Dependent Claim
129 words
Screw-shaped titanium anchoring member for parmanent anchorage in bone tissue specifically permanent anchorage of artificial teeth or tooth bridges in the jaw-bone, comprising at least one cavity directly communicating with the outer, cylindrical surface of the anchoring member to allow newly formed bone tissue to grow into said cavity characterized in that the edges (5, 10) of said cavities (4, 8) on the outer cylindrical surface are forming cutting edges to provide self-tapping when the anchoring member is screwed into the bone tissue, that said cavities are communicating only with the outer cylindrical surface, that the total volume of the cavities is adapted to contain the scraped-off bone tissue material and that the bottom end surface 6 is unbroken in order to avoid unintentional penetration of the bone membrane.
Claim 3
Dependent Claim
35 words
Anchoring member according to claim 1 characterized in that said cavities (4) are formed by at least one, preferably two perpendicular, through holes which are perpendicular to the longitudinal axis (7) of the anchoring member.
Claim 4
Dependent Claim
48 words
Anchoring member according to claim 2 characterized in that the holes have a longitudinal section defined by two straight, parallel edges in the longitudinal direction, which edges could form an angle with the longitudinal axis of the anchoring member, but which are preferably parallel to said longitudinal axis.
Claim 5
Dependent Claim
68 words
Anchoring member according to claim 3 characterized in that said cavities are formed by one or more bone material volumes, which are not going through the anchoring member and which are symmetrically distributed about the periphery of the anchoring member, each bone material volume formed by a plane cutting surface (11) having a positive cutting angle, and a concave clearance surface (12) perpendicular to said cutting surface (11).
Claim 6
Dependent Claim
19 words
Anchoring member according to claim 4 characterized in that said cavities comprises three such symmetrically distributed bone material volumes.
References Cited (Backward Citations)
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