US 6,981,868 B2
Dental filling instrument and attachment therefor
Shinichi Okawa, Kyoto (Japan); Kazunari Matoba, Kyoto (Japan); Chihiro Kobayashi, Ichikawa (Japan); and Takatomo Yoshioka, Tokyo-to (Japan)
Assigned to J. Morita Manufacturing Corporation, Kyoto (Japan)
Filed on Nov. 08, 2001, as Appl. No. 10/8,078.
Claims priority of application No. 2000-341822 (JP), filed on Nov. 09, 2000.
Prior Publication US 2002/0086264 A1, Jul. 04, 2002
Int. Cl. A61C 5/02 (2006.01); A61C 5/04 (2006.01)
U.S. Cl. 433—81 18 Claims
OG exemplary drawing
 
1. A dental filling instrument comprising:
a housing, said housing including:
a push rod for extruding a dental filler;
an electric drive motor for a push rod driving device for performing a dental filler extruding operation that causes the push rod to travel in a dental filler extruding direction coupled to and utilizing power of an electric power source;
a control circuit means for controlling the dental filler extruding operation of the electric drive motor, said control circuit means being provided in said housing;
an injection condition setting device for setting at least one of an amount of the dental filler to be injected, filler injection time and injection speed of the dental filler;
an injection condition display device for displaying at least one of an amount of the dental filler to be injected, filler injection time and injection speed of the dental filler;
a needle from which said dental filler is extruded fitted to a needle fitting portion of said housing;
a heating device for heating the needle up to a temperature at which the dental filler is softened, the heating device being disposed at one of the needle fitting portion and a location adjacent to the needle fitting portion;
a heating temperature setting device for setting the temperature up to which the needle is heated by the heating device; and
a heating control device for controlling a heating operation of the heating device based on the temperature set by the heating temperature setting device; and wherein:
the control circuit means includes:
a traveling speed control section for controlling traveling speed of the push rod;
a traveling distance control section for controlling distance which the push rod travels; and
a traveling time control section for controlling traveling time of the push rod; and
the control device controls the dental filler extruding operation of the push rod driving device based on the injection condition set by the injection condition setting device.