Dental filling instrument and attachment therefor

• US 6,981,868 B2
• Filed: 11/08/2001
• Issued: 01/03/2006
• Est. Priority Date: 11/09/2000
• Status: Expired due to Fees

• Current Assignee: J Morita Manufacturing Corporation (J. Morita Corporation)
• Original Assignee: J Morita Manufacturing Corporation (J. Morita Corporation)
• Inventors: Matoba, Kazunari, Okawa, Shinichi, Kobayashi, Chihiro, Yoshioka, Takatomo
• Primary Examiner(s): Wilson, John J
• Application Number:
  US10/008,078
• Publication Number:
  US 20020086264A1
• Time in Patent Office: 1,517 Days
• Field of Search: 433/32, 433/80, 433/81, 433/89, 433/90, 433/224, 272/326, 272/333, 272/638, 272/639, 272/63, 272/52, 272/146.1, 272/146.2, 272/146.5, 604/154, 604/155
• US Class Current: 433/81
• CPC Class Codes: A61C 5/50 Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
• CPC Class Codes: A61C 5/55 with heating means, e.g. for heating gutta percha
• CPC Class Codes: A61C 5/62 Applicators, e.g. syringes or guns
• CPC Class Codes: B05C 17/00516 Shape or geometry of the outlet orifice or the outlet element
• CPC Class Codes: B05C 17/00593 Hand tools of the syringe type

Abstract

A dental injecting apparatus for injecting a dental filler and a dental tool attached to such a dental injecting apparatus. The apparatus includes: an injection rod for injecting a dental filler; an injection rod driver for performing a dental filler injecting operation that causes the injection rod to move in a dental filler injecting direction by using the force of a power source; and a controller for controlling the dental filler injecting operation of the injection rod driver.

Claims

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.

2. The dental filling instrument as claimed in claim 1, in which the control device includes an extruding operation switch and a control section responsive to the extruding operation switch, wherein when the extruding operation switch is in an ON state, the control section responsive to the extruding operation switch permits the push rod driving device to perform the dental filler extruding operation, and wherein when the extruding operation switch is in an OFF state, the control section forcibly inhibits the push rod driving device from operating.

3. The dental filling instrument as claimed in claim 1, in which the push rod driving device is capable of performing a push rod returning operation that causes the push rod to travel in a direction opposite to the dental filler extruding direction by utilizing the power of the power source, wherein the control device includes a returning operation switch and a control section responsive to the returning operation switch, and wherein when the returning operation switch is in an ON state, the control section responsive to the returning operation switch forcibly inhibits the push rod driving device from performing the dental filler extruding operation while permitting the push rod driving device to perform the push rod returning operation.

4. The dental filling instrument as claimed in claim 3, in which the control device includes an extrusion stop control section for causing the push rod driving device to perform the returning operation for a predetermined time period immediately after the dental filler extruding operation of the push rod driving device has been stopped.

5. The dental filling instrument as claimed in claim 1, wherein the push rod driving device is capable of performing a push rod returning operation that causes the push rod to travel in a direction opposite to the dental filler extruding direction by utilizing the power of the power source, and wherein the control device includes:

a terminating point detection device for detecting the push rod reaching a first predetermined position in the dental filler extruding direction;

a starting point detection device for detecting the push rod reaching a second predetermined position in a direction the opposite to the dental fillet extruding direction; and

a push rod traveling range control section for forcibly inhibiting the push rod driving device from performing the dental filler extruding operation when the terminating point detection device detects the push rod reaching the first predetermined position, and for forcibly inhibiting the push rod driving device from performing the push rod returning operation when the starting point detection device detects the push rod reaching the second predetermined position.

6. The dental filling instrument as claimed in claim 1, which includes a housing shaped to allow a user to hold it with one hand, and wherein all other components are provided in one of a location which corresponds to an inside of the housing, and a location which corresponds to an outer surface of the housing.

7. The dental filling instrument as claimed in claim 1, which includes a heating temperature display device for displaying the temperature of said needle set by the heating temperature setting device.

8. The dental filling instrument according to claim 1, further comprising:

a main body of said housing; and

wherein

said needle fitting portion is provided in the main body, for attaching a needle, so as to extrude a dental filler from a tip of the needle, wherein the needle fitting portion is capable of being fitted with an attachment of one of the spreader type and the plugger type.

9. The dental filling instrument as claimed in claim 8, in which a heater is included in one of the needle fitting portion and a portion adjacent to the needle fitting portion.

10. The dental filling instrument as claimed in claim 8, in which the needle fitting portion is fitted with the attachment having a first end attached to the needle fining portion and a second end and defining a through-hole extending therethrough from the first end to the second end.

11. The dental filling instrument as claimed in claim 8, in which the needle fitting portion is capable of being fitted with the attachment formed from a superelastic alloy.

12. The dental filling instrument as claimed in claim 8, wherein said housing is shaped to allow a user to hold it with one band, and all other components are provided in one of a location which corresponds to an inside of the housing, and a location which corresponds to an outer surface of the housing.

13. The dental filling instrument according to claim 1, further comprising:

a body of said housing; and

an attaching portion, provided in the body, for attaching to a needle fitting portion of said dental filling instrument for extruding a dental filler from a tip of a needle attached to the needle fitting portion thereof.

14. The dental filling instrument as claimed in claim 13, wherein said attaching portion includes a first end attached to the needle fitting portion and a second end, and a through-hole extending therethrough from the first end to the second end.

15. The dental filling instrument as claimed in claim 13, wherein the needle of said attaching portion is made of a superelastic alloy.

16. The dental filling instrument as claimed in claim 1, wherein said housing includes an electric power source and said electric power source is a rechargeable battery means provided in said housing.

17. The dental filling instrument as claimed by claim 1 which further includes a filler magazine slidably supported by an upper portion of the housing and a plurality of filler storage sections provided in the filler magazine in portions of the filler magazines outwardly protruding on opposite sides of the housing.

18. The dental filling instrument according to claim 1 further comprising a filler magazine comprising a cylinder rotatably supported by an upper portion of the housing and a plurality of filler storage sections provided in said cylinder for storing fillers in portions of said cylinder on one side of the housing.