A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
A61C 13/15 (2006.01) A61C 5/04 (2006.01)
Patent
CA 2148438
An apparatus for placing, condensing and curing photopoly- merizable dental restorative material and photopolymerizable dental cement without substantially restricting the motion of the dentist. A first handpiece has a tip for use in condensing or plugging, as well as for the emission of light for curing. Visible light having a wavelength of about 400- 500 nm. is emitted in short, high intensity bursts for rapid curing. In addition to the plugger, the end of the handpiece also has a blade that may be used for applying resin. Thus, the device need only be twisted, rather than flipped, to perform this function. The handpiece is an elongated member with a hexagonal cross-section, and alternating sides of the tool have a conductive metal strip. The handpiece is only armed when all three strips are touched simultaneously. The handpiece is not armed when resting on a surface such as the chest of a patient, where at most two metal strips would receive contact. Emission of light from the handpiece can be controlled with a foot control. The handpiece may be detached from the fibre optic cable that connects it to a light source, and may be discarded or sterilized and replaced. A second handpiece has a forceps shape for placing around orthodontic brackets. Each prong of the forceps is equipped with a fibre optic bundle so that the firing of high intensity light bursts from the tips occurs simultaneously at two places on either side of the bracket. A light source module is connected to three handpieces by flexible fibre optic cables. There is mutual exclusion circuitry to prevent simultaneous firing of certain handpieces.
Bekesch Nicholas
Blake Cassels & Graydon Llp
LandOfFree
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