JP2004097516A - Instrument for expansion of root canal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument (file) for expansion of a root canal with which the cutting property of diamond is effectively magnified. <P>SOLUTION: In dental treatment, the instrument for expansion of the root canal is attachably and detachably mounted to the tip of a hand piece incorporating an ultrasonic oscillator, and the tip is inserted to the root canal and ultrasonic-oscillated for expand the root canal. The instrument 20 for expansion of the root canal consists of a metallic base material 21 with flexible elasticity, and the diamond 22 is electrodeposited to its surface discretely. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an instrument (file) suitable for use in enlarging a curved root canal in dental treatment.
[0002]
[Prior art]
In dental treatment, there is an operation of expanding a root canal, that is, a root canal enlargement operation, in order to remove softened dentin such as bacteria and foreign substances that have invaded the dentin during a process of endodontic root canal treatment. This root canal enlargement operation is a funnel-shaped operation using a file or a reamer to expand the transfer port, that is, the transition between the crown pulp and the root canal pulp, so that instruments and drugs can reach the apical part. There are various types, such as a manual type and an electric type, which are performed for facilitation, and there is also a type in which an instrument (file) is ultrasonically vibrated to cause a root canal to be enlarged.
[0003]
FIG. 2 is a diagram showing an example of a case in which a root canal enlargement operation is performed by ultrasonically vibrating a file. In the figure, reference numeral 10 denotes a handpiece having a built-in ultrasonic vibrator, and reference numeral 20 denotes a detachable handpiece. An instrument (file) for root canal enlargement, 30 is a tooth to undergo root canal enlargement work, and 31 is a root canal.
[0004]
[Problems to be solved by the invention]
When a root canal is enlarged using ultrasonic vibration, a diamond file may be used. This diamond file has good cutting efficiency, but the file itself has no elasticity (flexibility). When the curved root canal 31 as shown in FIG. 2 is to be enlarged, there is a problem that the root canal cannot be enlarged successfully because the diamond file does not bend along the root canal 31.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and particularly, a root canal enlargement in which a machinable diamond is effectively utilized and a curved root canal can be effectively enlarged. The purpose is to provide instruments (files).
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a root canal enlargement that detachably attaches to a distal end portion of a handpiece having a built-in ultrasonic vibrator, inserts the distal end portion into a root canal and ultrasonically vibrates to enlarge the root canal. Instrument, comprising a metal member having bending elasticity, wherein diamond is electrodeposited discretely on the surface.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the diamond is electrodeposited discontinuously at least in an axial direction.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1A and 1B are diagrams for explaining examples of root canal enlargement instruments (files) according to the present invention. In the drawings, reference numeral 20 denotes a root canal enlargement instrument; Is a metal file base material having bending elasticity such as SUS. Diamond 22 is discretely electrodeposited on the surface of the file base material 21. The electrodeposition pattern of the diamond 22 is determined by the pattern of the mask used in the electrodeposition. In order to improve the flexibility, for example, at least the diamond layer should not be continuous in the axial direction. As shown in FIG. 1A, the electrodeposition is performed so as to be discrete in the axial direction, and further, as illustrated in FIG.
[0009]
【The invention's effect】
As is clear from the above description, according to the present invention, diamond is discretely electrodeposited on the surface of a metal base material having bending elasticity to form an instrument (file) for enlarging a root canal. Provides a file for root canal enlargement that does not impair the bending elasticity of the material and can be used by inserting it into a curved root canal, and has excellent diamond cutting performance can do.
[Brief description of the drawings]
FIG. 1 is a view for explaining an example of a root canal enlargement instrument according to the present invention.
FIG. 2 is a diagram illustrating an example of a root canal enlargement operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Ultrasonic vibration handpiece, 20 ... Instrument (file) for root canal enlargement, 21 ... File base material, 22 ... Diamond, 30 ... Tooth, 31 ... Root canal.

Claims (2)

An instrument for root canal enlargement that is detachably attached to the tip of a handpiece that incorporates an ultrasonic vibrator, inserts the tip into the root canal, vibrates ultrasonically, and enlarges the root canal. An instrument for enlarging a root canal, wherein the instrument is made of a metal member having bending elasticity, and diamond is electrodeposited discretely on the surface. The instrument for enlarging a root canal according to claim 1, wherein the diamond is electrodeposited discontinuously at least in an axial direction.

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