Securing element

Details Securing element Securing element

A - Human Necessities

61

C

A61C 8/00 (2006.01)

Patent

CA 2156514

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.

L'invention concerne un élément de fixation de type vis en titane servant à effectuer un ancrage permanent dans un tissu osseux, en particulier l'ancrage permanent de dents artificielles et de bridges dans l'os de la machoire. L'élément de fixation possède une partie extérieure filetée, dont le sommet est réuni à une bride lisse , conique et/ou cylindrique (5, 9). L'extrémité filetée est conçue de façon que le filet (1) de la partie périostique de l'élément de fixation soit réuni à la bride (5, 9) par l'intermédiaire d'une gorge cylindrique (7) possédant la géométrie de la filière. Ceci permet d'obtenir un pas de vis et une profondeur de filet corrects jusqu'à la bride, au moyen d'une géométrie satisfaisante, où le trou taraudé au préalable épouse la géométrie du filet jusqu'à la bride, de manière à optimiser l'utilisation de l'os cortical.

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