Method and apparatus imparting vibrations to bone

A - Human Necessities – 61 – H

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Details

A61H 23/00 (2006.01) A61C 19/06 (2006.01) A61H 1/00 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2170269

Vibrations for application to hard living tissue, such as bones, teeth, etc., are derived from a magnetorestrictive element (20) disposed in a varying electro-magnetic field to create dimensional variations in the magnetorestrictive element (20). In an audiodontic vibrator for the hearing impaired, a magnetorestrictive rod (20) is disposed in the hollow core of an electromagnetic coil (17) through which current flows in response to acoustic signals. The resulting electromagnetic field in the core passes through the magnetorestrictive rod (20), causing small dimensional variations in the and (20) corresponding to amplitude variations in the field. An actuator (31) in contact with the rod extends from the housing and transmits the dimensional changes as low amplitude vibrations to the hard tissue via a bracket (41) mounted on a tooth (40) by an adhesive resin- based cement. The bracket (41) has a receiving channel (43) contoured to slidably and removably receive the distal end (37) of the actuator (31) in close fitting frictional relation.

Des vibrations s'appliquant à un tissu vivant dur, tel que des os, des dents, etc., proviennent d'un élément magnétostrictif (20) situé dans un champ magnétique variable, de façon à créer des variations dimensionnelles dans l'élément magnétostrictif (20). Dans un vibrateur audiodontique destiné aux handicapés auditifs, une tige magnétostrictive (20) est située dans le noyau creux d'une bobine électromagnétique (17) à travers laquelle passe du courant en réaction à des signaux acoustiques. Le champ électromagnétique obtenu dans le noyau passe à travers la tige magnétostrictive (20), ce qui provoque de petites variations dimensionnelles dans la tige (20) correspondant à des variations d'amplitude du champ. Un actuateur (31) en contact avec la tige s'étend à partir du boîtier et transmet les variations dimensionnelles en tant que vibrations à basse amplitude au tissu dur par l'intermédiaire d'un support (41) monté sur une dent (40) au moyen d'un ciment adhésif à base de résine. Le support (41) possède un canal de réception (43) profilé afin de recevoir coulissante et amovible l'extrémité distale (37) de l'actuateur (31) en relation de frottement étroite.

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