Securing element
US5772437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1995 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Oct 5, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C8/0022
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a screw-type securing element, made of titanium, for permanent anchoring in bone tissue, in particular for permanent anchoring of artificial teeth and dental bridges in the jaw bone, the securing element having an outer threaded portion which at the far top merges into a smooth, conical and/or cylindrical flange (5, 9). The thread end is such that the thread (1) in the periosteal part of the securing element merges into the flange (5, 9) via a cylindrical groove (7) which has the geometry of the threading die. By means of maintaining, in this way, a correct thread pitch and thread depth right up to the flange, a geometrically satisfactory match is obtained, in which the previously threaded hole matches the geometry of the thread right up to the flange, which means that the cortical bone can be better utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.