Dental instrument

A - Human Necessities – 61 – C

Patent

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Details

A61C 3/00 (2006.01) A61C 3/02 (2006.01)

Patent

CA 2340128

The invention relates to a dental instrument for removing caries attacked dentine in connection with chemical-mechanical treatment of caries by means of a caries-dissolving solution applied to the caries for loosening the caries tooth substance. The instrument comprises a tool head (1) with a number of scraping edges or bristles (2, 5, 9) for scraping away the loosened caries tooth substance. In the spacings (2', 9') formed therebetween drops of the gel solution used for the chemical-mechanical treatment can be carried (transported) up to the tooth treatment site. In contrast to previous scraping instruments of this type the instrument is power-driven in order to provide the tool head (1) with a predetermined scraping motion. Preferably the instrument is provided with a torque control alarming or stopping the motion of the instrument as soon as the torque has reached a predetermined limit value.

L'invention concerne un instrument dentaire, destiné à enlever la dentine attaquée par les caries, en association avec un traitement chimio-mécanique des caries, au moyen d'une solution de dissolution des caries appliquée sur celles-ci, afin de libérer la substance dentaire cariée. Cet instrument comprend une tête (1) dotée d'un certain nombre de rebords ou soies de grattage (2, 5, 9), servant à enlever par grattage la substance dentaire cariée. Dans les espacements (2', 9') formés entre les rebords ou soies, on peut transporter jusqu'au site de traitement dentaire des gouttes de la solution en gel utilisée pour le traitement chimio-mécanique. Par rapport à des instruments de grattage actuels de ce type, l'instrument de l'invention est entraîné électriquement, de manière à fournir à la tête (1) de l'instrument un mouvement de grattage déterminé. De préférence, cet instrument est doté d'une commande de couple, signalant que le couple a atteint sa valeur limite déterminée, ou arrêtant le mouvement de l'instrument aussitôt que le couple a atteint cette valeur.

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