Patent ID: 6315557
Filing Date: 2001-11-13
Classification: A61C

Abstract:
A rotary dental instrument for rotating a cutting tool at a repair site of a patient's tooth and providing an irrigating liquid to the repair site, the instrument comprising:a handpiece having a motor-driven rotating element for receiving and rotating the cutting tool when the rotating element is driven and at least one irrigating port for discharging the irrigating liquid generally at the repair site,a motor coupled to said rotating element for rotating the cutting tool,a pressurized irrigating liquid supply fluidly coupled to the irrigating port and operative to supply the irrigating liquid through said irrigating port in a pressurized manner, anda control operatively coupled with said motor and said pressurized irrigating liquid supply, said control operative to automatically delay the start of discharge of said irrigating liquid from said irrigating port for a predetermined time with respect to the start of rotation of said motor-driven rotating element, wherein said control receives an input from a user and, in response to the input, sends respective signals to initiate rotation of said motor-driven rotating element and said pressurized irrigating liquid supply, the signal sent to initiate operation of said pressurized irrigating liquid supply being delayed with respect to the signal sent to initiate rotation of said motor-driven rotating element, thereby providing an automatic delay between rotation of said rotating element and discharge of said irrigating liquid from said irrigating port.