JP2016059586A - Tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tip equipped to a hand piece having a vibration generating unit built-in, cooled at the point certainly, and suitable for treatment in a narrow treatment part.SOLUTION: A tip 20 equipped to a hand piece having a vibration generating unit built-in comprises a basement 21 equipped to the hand piece and a point 22 having a function unit 25. A liquid feed passage 24 is provided in the basement 21 and the point 22, and the function unit 25 of the point 22 has plural spots of liquid release parts in an entire surface. The function unit 25 comprises, for example, plural spheroids, and the liquid release part comprises gaps formed between the plural spheroids.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chip, and more particularly, to a chip mounted on a handpiece having a built-in vibration generating unit.

  A scaler device using vibration such as an air scaler or an ultrasonic scaler is used not only for removing tartar but also for removing a prosthesis, forming a root canal during endodontic treatment, and washing a root canal. Such a scaler device has a handpiece and a tip (cutting tool), and the gripping part of the handpiece has a vibration generating part by air driving or a vibration generating part by electric driving using an ultrasonic vibrator. It has a built-in vibrating body for transmitting the vibration from the vibration generating unit to the tip attached to the tip of the handpiece.

  And the vibration from the vibration generating part of the handpiece is amplified by the vibrating body and transmitted to the chip. The tip of the tip is inserted into a root canal or a periodontal pocket and used for cutting the inner wall of the root canal, removing a prosthesis, removing calculus, and the like. In addition, some chips are used to form a hole in the bone at the time of implantation.

  In such a scaler device, the tooth is cut by the vibration of the working end of the tip of the tip, so if the tooth cannot be cooled during the tooth treatment, damage due to cell necrosis or burns due to heat generation at the treatment site will occur. Can happen. For this reason, for example, in Patent Document 1, a water supply path is provided in the shank portion of the chip having the shank portion and the action portion, and the outlet of the water supply passage is located in front of the bent portion between the shank portion and the action portion. The thing opened to the outer periphery of is disclosed. Further, Patent Document 2 discloses a chip having a fluid supply groove inside the chip, and the fluid supply groove is branched into a plurality of groove shunts reaching the work surface.

JP 2002-159510 A Japanese Patent No. 3388545

  Thus, conventionally, it has been carried out to cool the contact surface between the sword portion of the tooth cutting tool and the tooth treatment site by injecting water into the cutting location. For example, in the one disclosed in Patent Document 1, When the tip is inserted into a narrow periodontal pocket or tooth root canal, there is a problem that water cannot be sufficiently injected up to the tip portion of the tip which is an action portion. In addition, in the one disclosed in Patent Document 2, since the surface other than the work surface cannot be sufficiently cooled, when the treatment is performed by inserting into a narrow treatment site, the treatment site is damaged by a portion other than the work surface. was there. These problems are basically the same for the cooling of the tip used at the time of implantation.

  The present invention has been made in view of these circumstances, and is a chip attached to a handpiece incorporating a vibration generating unit, and the tip of the chip can be reliably cooled, and a narrow treatment site It is an object of the present invention to provide a chip suitable for treatment in the field.

  In order to solve the above-mentioned problem, the invention of claim 1 is a chip attached to a handpiece incorporating a vibration source, and comprises a base attached to the handpiece and a tip having an action part. The base portion and the tip portion have liquid supply paths, and the action portion of the tip portion has a plurality of liquid discharge portions over the entire surface.

  According to a second aspect of the present invention, in the first aspect of the invention, the action portion of the chip is composed of a plurality of spherical bodies and / or polyhedrons provided around the opening of the tip portion of the liquid supply path, and the liquid discharge portion. Is composed of gaps formed between the plurality of spherical bodies and / or polyhedrons.

  According to a third aspect of the present invention, in the first aspect of the present invention, the working portion of the chip is formed of an open cell structure provided around the opening of the tip of the liquid supply path, and the liquid discharge unit is the open cell. It is characterized by being constituted by a gap of the structure.

  According to the present invention, the tip of the chip can be reliably cooled, suitable for treatment at a narrow treatment site, and prevention of cell necrosis or burn damage due to heat generation at the treatment site is prevented. Can do. Further, when the vibration is an ultrasonic wave, cavitation can be reliably generated.

It is sectional drawing which shows an example of the handpiece equipped with the chip | tip which concerns on this invention. It is a figure which shows an example of the chip | tip concerning this invention. It is a figure which shows another example of the chip | tip concerning this invention.

  Hereinafter, preferred embodiments according to the chip of the present invention will be described with reference to the drawings. In the following description, the configurations denoted by the same reference numerals in different drawings are the same, and the description thereof may be omitted. Hereinafter, a handpiece having an ultrasonic element as a vibration source of the chip will be described, but the drive source may be air.

  FIG. 1 is a cross-sectional view showing an example of a handpiece equipped with a chip according to the present invention. The handpiece 10 includes a handpiece body 11 and a connection socket 12 connected to the rear end side (right side of the drawing) of the handpiece body 11 via a connection plug 19. Connected to the connection socket 12 is a hose 30 for receiving power and cooling water from a dental treatment unit (not shown).

  An ultrasonic vibration body (horn) 14 that transmits vibrations of the ultrasonic vibrator 13 and the ultrasonic vibration body 14 to the chip 20 is provided inside the handpiece body 11. The ultrasonic vibrator 13 is composed of a cylindrical holder in which a plurality of disk-shaped piezoelectric elements polarized in the thickness direction are integrated and integrated in a coaxial holder, and a high frequency power source is applied. The chip is vibrated by the piezoelectric strain that is generated. The ultrasonic vibrator 13 is supplied with high frequency power from a power cord 18 connected to a dental treatment unit (not shown) through a hose 30.

  The ultrasonic vibrator 14 is for transmitting the vibration of the ultrasonic vibrator 13 to the chip, and a shaft hole 15 for mounting the chip 20 is provided at the tip of the ultrasonic vibrator 14. A female screw 15 a is formed on the inner peripheral surface of the shaft hole 15. A cooling water supply hole 16 is provided at the rear end of the shaft hole 15, and cooling water is injected into the shaft hole 15 from a water supply tube 17 connected to a dental treatment unit (not shown) through a hose 30. .

  The chip 20 is usually made of a metal material, and includes a base portion 21 attached to the handpiece 10 and a distal end portion 22 having an action portion. A male screw 23 a is formed at the end of the base portion 21, and the chip 20 is attached to and detached from the handpiece 10 by screwing the male screw 23 a into the shaft hole 15 of the ultrasonic vibrating body 14 inside the handpiece 10. I am trying to attach it freely. Further, the axial length of the portion provided with the male screw 23 a is configured to be shorter than the axial length of the axial hole 15 of the ultrasonic vibrator 14, and when the tip 20 is attached to the handpiece 10, the axial hole A space is formed at the rear end portion of 15, and the cooling water supply hole 16 is opened in this space.

  A liquid supply path 24 is provided inside the base portion 21 and the tip portion 22 of the chip 20. Thus, when the tip 20 is mounted on the handpiece 10, the cooling water injected from the water supply tube 17 into the shaft hole 15 passes through the liquid supply path 24 in the tip 20 and, as will be described later, the tip of the tip 20. The liquid discharge part provided on the entire surface of the action part of the part 22 is discharged to the outside.

  A main object of the present invention is to provide a chip that is attached to a handpiece having a built-in vibration generating unit, the tip of the chip can be reliably cooled, and suitable for treatment at a narrow treatment site. It is to be. As a configuration for this, the chip according to the present invention includes a base portion to be attached to the handpiece and a tip portion as an action portion, and has a liquid supply path inside the base portion and the tip portion, The action part has a plurality of liquid discharge parts over the entire surface. The configuration of the chip will be described below.

  FIG. 2 is a diagram showing an example of a chip according to the present invention. The chip 20 shown in FIG. 2 includes a base 21 attached to the handpiece 10 and a tip 22 having an action part 25. Here, the action part means a place where the tip 20 is brought into direct contact with the treatment site when the tip 20 is used as a cutting tool. In other words, it can be said to be a cutting tool blade. In the chip 20 shown in FIG. 2, the action portion 25 is provided around the opening of the tip portion 22 of the liquid supply path 24 so that the end portion of the tip portion 22 and the entire peripheral surface in the vicinity thereof function as the action portion. It consists of a plurality of spherical bodies 26. In addition, the central axis of the base portion 21 and the central axis of the distal end portion 22 have a predetermined angle so that the distal end portion 22 can easily reach the treatment site in the oral cavity. The base portion 21 and the tip portion 22 may be arranged on a straight line.

  The action part 25 is produced, for example, by combining a plurality of granular metal spheres by fusing. The gap between the spherical bodies 26 serves as a liquid discharge portion for the cooling water supplied through the liquid supply path 24. For this reason, in this embodiment, the several liquid discharge | release part is formed over the whole surface of the action part 25 of the front-end | tip part 22. FIG. Each metal spherical body may be coated with diamond powder by electrodeposition. Thereby, the hardness of the action part 25 can be raised and efficient cutting is attained. Note that the spherical body does not have to be a true sphere. Furthermore, the action part 25 may be a combination of a plurality of diamond particles by electrodeposition. Moreover, as the action part 25, a metal polyhedron may be used instead of the metal sphere, and a mixture of the metal sphere and the metal polyhedron may be used.

  FIG. 3 is a diagram showing another example of the chip according to the present invention. The tip 20 shown in FIG. 3 also includes a base portion 21 attached to the handpiece 10 and a distal end portion 22 having an action portion 25, similarly to the tip 20 shown in FIG. 2. In the chip 20 shown in FIG. 3, the action portion 25 is a continuous portion provided around the opening of the tip portion 22 of the liquid supply path 24 so that the end portion of the tip portion 22 and the entire peripheral surface in the vicinity thereof function as the action portion. It consists of a bubble structure 27. As the open cell structure 27, for example, porous metal or porous ceramic having air permeability can be used. The opening of the open cell structure 27 acts as a liquid discharge part, and the cooling water supplied through the liquid supply path 24 is discharged to the entire surface of the action part 25 through the bubbles in the open cell structure 27. Become.

  As described above, as the embodiment described above, the action portion of the tip end portion of the tip has a sharp shape, but the shape of the action portion may be, for example, a sickle shape, a saddle shape, a saddle shape, a file shape, Various shapes such as a shape may be used. And according to the present invention, the end of the tip of the tip and the entire peripheral surface in the vicinity thereof function as the action part, and the liquid discharge parts are provided at a plurality of locations over the entire surface of the action part. Cooling can be performed reliably. In addition, since the coolant is constantly supplied to the action part, cavitation can be reliably generated when the action part is attached to a handpiece having an ultrasonic transducer.

DESCRIPTION OF SYMBOLS 10 ... Handpiece, 11 ... Handpiece main body, 12 ... Connection socket, 13 ... Ultrasonic vibrator, 14 ... Ultrasonic vibrator, 15 ... Shaft hole, 15a ... Female screw, 16 ... Hole, 17 ... Water supply tube, 18 ... Power cord, 19 ... Connecting plug, 20 ... Chip, 21 ... Base, 22 ... Tip, 23a ... Male screw, 24 ... Liquid supply path, 25 ... Action part, 26 ... Spherical body, 27 ... Open cell structure.

Claims (3)

  A chip attached to a handpiece containing a vibration source, comprising a base attached to the handpiece and a tip having an action part, and having a liquid supply path inside the base and the tip The tip of the tip has a plurality of liquid discharge portions over the entire surface.   The action part of the chip is composed of a plurality of spherical bodies and / or polyhedrons provided around the opening of the tip of the liquid supply path, and the liquid discharge part is formed between the plurality of spherical bodies and / or polyhedrons. The chip according to claim 1, wherein the chip is composed of a gap formed between the two. The action part of the chip is formed of an open cell structure provided around the opening of the tip of the liquid supply path, and the liquid discharge part is constituted by a gap of the open cell structure. The chip according to claim 1.

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