Device for extracting a dental appliance

A - Human Necessities – 61 – C

Patent

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Details

A61C 3/16 (2006.01)

Patent

CA 2398885

The invention concerns an instrument for setting a crown (4) or a sealed prosthesis on a natural or prosthetic support by generating a couple of forces between the occlusal surface of the stump (3), and the basal surface of the crown (4). The instrument consists of an indented intermediate portion (C) and a working portion (D), which may constitute an extension of a handle (A), and a tapered intermediate portion (B). When it is inserted in a groove previously performed by the practitioner at a supposed level of the occlusal part of the stump (3) along a plane substantially parallel to the occlusal surface of the crown (4), said working portion (D) enables by a physical action to exert a couple of forces between the respective occlusal surfaces of the stump (3) and the basal surface of the crown (4). The couple of forces being generated substantially in the vertical axis (F) of the tooth or implant, the instrument enables to limit the traumas for the patient, to preserve the support base, to safeguard the prosthesis for future resetting.

Clef à desceller les couronnes dentaires. L'invention concerne un instrument dentaire permettant de déposer une couronne (4) ou une prothèse scellée sur support naturel ou prothétique en générant un couple de forces entre la surface occlusale du moignon (3) et l'intrados de la couronne (4). L'instrument est constitué par une partie intermédiaire échancrée (C) et une partie travaillante (D), lesquelles font accessoirement suite à un manche (A), et une section intermédiaire effilée (B). Insérée dans une rainure (2) préalablement effectuée par le praticien au niveau supposé de la partie occlusale du moignon (3) selon un plan sensiblement parallèle à la surface occlusale de la couronne (4), cette partie travaillante (D) permet par une action physique d'exercer un couple de forces entre les faces occlusales respectives du moignon (3), et de l'intrados de la couronne (4). Le couple de forces étant généré sensiblement dans l'axe vertical (F) de la dent ou de l'implant, l'instrument inventé permet de limiter les traumatismes pour le patient, de préserver le pilier support, et de sauvegarder la prothèse en vue d'une éventuelle repose.

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