JPS58177643A - Instrument for forming root canal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a root canal forming instrument used in endotherapy, and more particularly, to a root canal forming instrument that is formed by attaching diamond abrasive grains to the outer periphery of a metal needle member through a metal plating layer. Relating to a forming instrument.

In endotherapy, after pulp removal in the pulp extraction root canal,
Root canal formation is performed to mechanically remove pulp tissue fragments remaining on the inner wall of the root canal and to remove organic substances that may decompose and decompose in the future, becoming inflammatory substances and inducing infection. . Root canal formation instruments are used to form such root canals more rationally and efficiently.

In forming such a root canal, two types of operations, reaming and filing, are performed in the operation of the root snow forming instrument. Among these, reaming is an operation in which the root canal wall is cut by a clockwise rotational movement, and filing is an operation in which the root canal wall is cut by a traction movement. By performing these two operations in an appropriate combination, the root canal is shaped so that the root canal filling cone at the end of the treatment fits well, and the inside of the root canal is mechanically agitated.

By the way, in the root canal formation KTo as described above, and in the past, a treatment instrument is used in which the outer periphery of a metal needle member is made into a helical blade by grinding the outer periphery of the blade as shown in Fig. 1. I came.

However, conventional root canal preparation instruments are simply metal with a sharpened blade, so the blade lacks strength, and as a result, is not durable and must be replaced frequently. Ta. Furthermore, since the methods of sharpening the blade are different, it is necessary to use separate instruments for reaming and seven-eye ringing, and as a result, it is necessary to prepare a large number of two types of instruments depending on their diameters. Furthermore, the sharpening process requires a high degree of skill, resulting in high production costs. Moreover, in addition to the above-mentioned filing and mink use and the rounding work where the needle-like member is likely to break, the cutting efficiency itself is poor, the work efficiency is low, and the non-invention mentioned above is This was created to solve the problem and provide a new root canal preparation instrument.The purpose is to improve durability, to be able to be used for both eye ringing and reaming, and to be easy to manufacture. Moreover, the purpose is to improve work efficiency.

For this purpose, diamond abrasive grains are attached to the outer periphery of a metal needle-like member with a metal plating layer.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 is an I11 plane view showing one embodiment of the root canal forming instrument according to the present invention, and FIG. 3 is an enlarged cross-sectional view of the main part of FIG. 2, with reference numeral 1 indicating a needle-like member.

The needle member 1 is 8W specified in JI8G 3522.
It is made of metal such as PA or 8WPB piano wire. The reason for selecting such piano wire is that it will never break even if the root canal formation instrument is subjected to stress from various directions during leaning and filing operations. If the needle-like member 1 were to break during surgery, it would not only be extremely dangerous, but also require a great deal of time and effort to remove the broken piece. Therefore, since it is known in advance that the needle-like member 1 will not break, the treatment can be performed by applying a large force.

The needle-like member 1 is coupled to a handle 2. The operator pinches the handle 2 to rotate and pull the needle-like member 1. Of course, such a handle 2 is provided only for manual use, and when used integrally with a rotating tool (usually referred to as an engine), which is not shown, there is a structure that fits into the engine. It is said that

A scale 3 is attached to the surface of the needle-like member 1 following the handle 2. This scale 3 is used to determine the working length (mainly depth) of the root canal formation instrument, and may be an indicator line or a cut groove.

On the outer periphery of the needle member 1 following the scale 3, abrasive grains 4 of diamond, alundum, corundum, etc. are layered. This abrasive grain 4 is used for both reaming and 7-eye ringing in place of the metal blade of the prior art. That is,
According to such abrasive grains 4, there is no need to distinguish between reaming and eyering, and it is possible to perform both operations. In addition, the abrasive grains 4, especially diamond abrasive grains, have much less wear compared to metal blades.
It has good sharpness and sharpness, and its performance is stable over a long period of time.

The particle diameter of the abrasive grains 4 is set to 2,000 to 300 mesh. Then, in order to attach the abrasive grains 4 like grains to the outer periphery of the needle-like member 1, as shown in FIG. Then, the abrasive grains 4 are attached by a chrome plating layer 6. Of course, the abrasive grains may be attached using a recently developed adhesive, but according to the metal plating technology for forming the chrome plating layer 6, etc., the chrome plating layer 6 has high heat resistance and chemical resistance. Because of its excellent properties, it can be sterilized with high temperature steam after use, allowing it to be used hygienically for a long period of time. Moreover, according to such metal plating technology, manufacturing work is significantly simplified and facilitated compared to conventional polishing processing, and mass production and cost reductions can be achieved.

The tip T of the needle-like member 1 is particularly rounded, and no abrasive grains 4 are attached to the tip T. Abrasive grain 4
In order to prevent such selective adhesion, masking/gluing can be performed during metal plating to easily prevent adhesion. The reason why the tip 1 is rounded and no abrasive grains 4 are attached is to prevent the tip 1 from performing the same cutting and polishing functions. This is for the purpose of Only with such a guide can the reaming and seven-eye ring operations be carried out with great force, so to speak, and the work efficiency can be further improved.

As described above, according to the root canal formation instrument according to the present invention, the durability of the instrument is dramatically improved by attaching diamond abrasive grains to the outer periphery of the metal needle member through a metal plating layer. 7 In addition, both eye ringing and reaming work can be done with the same model, reducing the need to change models, making production easier and reducing production costs.
The work can be done very well and efficiently, making it useful as a dental treatment tool.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the prior art, FIG. 2 is a side view showing an embodiment of the root canal formation instrument according to the present invention, and FIG. 3 is an enlarged sectional view of the main part of FIG. be. 1... needle-like member, 2... handle, 3... scale,
4... Abrasive grains, 5... Copper plating layer, 6...
Chrome plating layer, T...Tip. Tokken Applicant Inoue Attachment Co., Ltd. No Figure 1 Figure 3 Procedural Amendment 1980 IR, June λ Date Commissioner of the Patent Office Haruki Shimada 1, Indication of Case 1982 Patent Application No. 060937 4, Agent Person's correction Description 1. Name of the invention Root canal formation device 2. Claim 1. A root canal formation device characterized by having abrasive particles attached to the outer periphery of a metal needle-like member. 2. The root canal formation instrument according to claim tjII, item 41, characterized in that abrasive grains are not attached to the tip of the needle-like member. 3. The root canal forming instrument according to claim 2, wherein the abrasive grains are attached to the needle-like member by a metal plating layer. 4. The root canal forming instrument according to claim 3, characterized in that the metal plating layer is nickel plated. 5. The root canal forming instrument according to claim 3, wherein the abrasive grains are diamond abrasive grains. 6. The root canal forming instrument according to claim 3, characterized in that the needle-like member is made of highly elastic wood such as piano wire. 3. Detailed Description of the Invention The present invention relates to a root canal formation instrument used for endotherapy, and in particular, it is made of a metal needle-like member with abrasive grains such as diamond attached to the outer periphery of the instrument through a metal plating layer. Related to root canal formation instruments. In endotherapy, after removing the tooth gap in the extraction root canal,
The root canal is formed in order to mechanically remove the space tissue debris remaining on the inner wall of the root canal, and to remove organic substances that may rot and decompose in the future and become inflammation-causing substances that may induce bacterial infection. It is done. In order to form such a root canal conveniently and efficiently, a root canal forming instrument is used. In forming such a root canal, two types of operations are performed in the operation of a conventional root canal forming instrument: reaming and filing. Among these, reaming is an operation in which the root canal wall is cut by a rotational motion, and filing is an operation in which the root canal wall dentin is cut by a pulling motion. Then, by performing these two operations in an appropriate combination, the root canal is shaped so that the root snow filling cone at the end of the treatment fits well, and the inside of the root canal is mechanically cleaned. By the way, for root canal formation as described above, conventional treatment instruments have been used, such as the one shown in Fig. 1, in which the outer periphery of a metal needle-like member is ground into a helical blade. I came. However, since conventional root canal preparation instruments are nothing more than a metal blade with a sharp edge, the strength of the blade is insufficient, and as a result, it is not durable and must be replaced frequently. did not become. In addition, since the methods of sharpening the blade are different, it is necessary to use separate tools for reaming and 7-eye ringing, and as a result, it is necessary to prepare a large number of 2m-sized tools depending on the diameter. Furthermore, the sharpening process required a high level of skill, resulting in high production costs. Moreover, in addition to the need to use the above-mentioned filing and mink properly and the work to be done slowly because the needle-shaped member is easily broken, the cutting efficiency itself was poor, resulting in low work efficiency. The present invention was made in order to solve the above-mentioned problems, and provides a new root canal formation instrument.The purpose of the present invention is to improve durability and to be able to be used for both filing and reaming operations. The objective is to facilitate manufacturing and improve work efficiency. For this purpose, abrasive grains such as diamond are attached to the outer periphery of the metal needle member with a gold plating layer. Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 2 is a side view showing one embodiment of the root canal formation instrument according to the present invention, and FIG. 3 is an enlarged sectional view of the main part of FIG.
1 indicates a needle-like member. The needle-like member l is 5W specified in JISG 3522.
Highly elastic material such as PA or 5WPB piano wire. The reason for selecting such piano wire is that it will never break even if the root canal formation instrument is subjected to stress from various directions during reaming and filing operations. If the needle-like member 1 were to break during surgery, it would not only be extremely dangerous, but also require a great deal of time and effort to remove the broken piece. Therefore, since it is known in advance that the needle-like member l will not break, a large force can be applied during the treatment. The needle-like member l is coupled to the handle portion 2. The operator pinches the handle 2 to rotate and pull the needle-like member 1. Normally, such a handle 2 is provided only for manual use, and when used in conjunction with a rotating tool (usually referred to as a carrot), which is not shown, it fits into the engine. It is considered to be a structure. Abrasive grains 3 of diamond, alundum, corundum, etc. are attached to the outer periphery of the needle-like member l following the handle 2. This abrasive grain 3 is used for both reaming and filing in place of the metal blade of the prior art. That is,
According to such abrasive grains 4, there is no need to distinguish between reaming and filing operations, and it is possible to perform both operations. In addition, abrasive grains 3, especially diamond abrasive grains, have much less wear compared to metal blades.
It has good sharpness and sharpness, and its performance is stable over a long period of time. The particle size of the abrasive grains 3 is 2,000 to 100 mesh. In order to attach such abrasive grains 3 to the outer periphery of the needle-like member l, the abrasive grains are attached by a nickel plating layer 4, as shown in FIG. Of course, the abrasive grains may be attached using a recently developed adhesive, but according to the metal plating technology for forming the nickel plating layer 4, etc., the nickel plating layer 4 has good heat resistance and chemical resistance. Because of its excellent properties, it can be sterilized with high temperature steam and chemicals after use, allowing it to be used hygienically for a long period of time. In addition, with this metal plating technology, the manufacturing work is much simpler and easier than the conventional grinding process.
Significant mass production and cost reductions will be realized. No abrasive grains 3 are attached to the tip 5 of the needle-like member l. In order to prevent the abrasive grains 3 from selectively adhering in this way, masking can be performed during metal plating to easily prevent adhesion. The reason why we decided not to attach abrasive grains 3 to the tip 5 is to prevent the tip 5 from performing the same cutting and grinding functions, and to prevent the tip 5 from performing the same cutting and grinding functions. This is to serve as a guide. Only with such a guide can the reaming and filing operations be carried out with the added benefit of a sharp cutter, which further improves work efficiency. As described above, according to the root canal formation instrument according to the present invention, the durability of the instrument is improved by attaching abrasive grains such as diamond to the outer periphery of the metal needle member through a metal plating layer. In addition, both filing and reaming work can be done with the same model, reducing the number of machine changes, making production easier, reducing production costs, and making work much easier and more efficient. It is useful as a dental treatment tool. 4. Brief description of the drawings FIG. 1 is a side view showing the prior art, FIG. 2 is a side view showing an embodiment of the root canal formation instrument according to the present invention, and FIG. FIG. 1... Needle member 2... Handle part 3... Abrasive grains 4... Nickel plating layer 5... Tip part

Claims (1)

[Scope of Claims] 1. A root canal forming instrument characterized by having abrasive grains attached to the outer periphery of a metal needle-like member. 2. The root canal forming instrument according to claim 1, wherein abrasive grains are not attached to the tip of the needle-like member. 3. The root canal forming instrument according to claim 2, wherein the abrasive grains are attached to the needle-like member by a metal plating layer. 4. The root canal forming instrument according to claim 3, characterized in that the metal plating layer is made of copper plating as a base layer, and is coated with copper plating on top of the base layer. 5. The root canal forming instrument according to claim 3, wherein the abrasive grains are diamond abrasive grains. 6. The root canal formation instrument according to claim 3, wherein the needle-like member is a piano wire.