JP5420502B2 - Dental root canal length measuring instrument - Google Patents

Dental root canal length measuring instrument Download PDF

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JP5420502B2
JP5420502B2 JP2010200634A JP2010200634A JP5420502B2 JP 5420502 B2 JP5420502 B2 JP 5420502B2 JP 2010200634 A JP2010200634 A JP 2010200634A JP 2010200634 A JP2010200634 A JP 2010200634A JP 5420502 B2 JP5420502 B2 JP 5420502B2
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root canal
measuring
canal length
measuring needle
needle
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JP2012055458A (en
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幸枝 宮本
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株式会社長田中央研究所
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Description

本発明は、根管治療の際に行われる根管長測定において、根管長測定針(ファイル又はリーマ)を保持する測定針クリップホルダ筒の先端部を金属表面とし、測定針を上下動、回動することによって生じるホルダ筒先端部の削れを防止するようにした歯科用根管長測定器に関する。   In the root canal length measurement performed during root canal treatment, the tip of the measuring needle clip holder cylinder holding the root canal length measuring needle (file or reamer) is a metal surface, and the measuring needle is moved up and down. The present invention relates to a dental root canal length measuring device that prevents the tip of a holder tube from being scraped by turning.

根管治療においては、根管治療に際し、根管長測定針を根管内に挿入し、その先端が根尖孔の位置に到達したことを検知し、その状態で、根管長測定針に挿通されたストッパの位置を歯冠に当接させ、その状態で根管長測定針を根管から引き出し、物差し等を用いて、根管長測定針の先端から前記ストッパまでの長さ(根管長)を計測して根管長を求めている。   In root canal treatment, a root canal length measuring needle is inserted into the root canal, and it is detected that the tip has reached the position of the apical hole. The position of the inserted stopper is brought into contact with the crown, and in that state, the root canal length measuring needle is pulled out of the root canal and the length (root of the root canal length measuring needle to the stopper is measured using a ruler or the like. Root canal length is obtained by measuring the tube length).

図2は、従来の根尖孔位置検出装置の一例を説明するための要部構成図で、図中、1は根尖孔位置(又は根管長)測定針(リーマ又はファイル)、2は根尖孔位置(又は根管長)を測定しようとする歯牙、3は根管、4は測定針1に軸方向に移動可能に設けられたストッパ、5は***、6aは測定針1をクリップする測定電極、7は測定電極6aに対する対向電極、8は測定電極6aに連通する測定電極用リード線、9は***5に引っかけられた対向電極7に連通する対向電極用リード線、10は先端部に前記電極6aを有する測定電極線6(図4参照)を収納した測定針クリップホルダ、20は前記リード線8,9が接続された根管長測定器、21は根尖孔位置検出表示部で、周知のように、測定針(ファイル又はリーマ)1に測定電極6aを接触させた状態で、測定針1を根管3内に挿入していった時の根尖孔位置検出表示部21の指針位置より測定針1の先端が根尖孔位置に達したことを知り、その状態でストッパ4を歯牙2の歯冠に当たる位置まで動かし、その状態で測定針1を口腔外に取り出し、物差しで該測定針1の先端からストッパ4までの長さを測定するものである(例えば、特許文献1参照)。表示部21は、例えば、LED,液晶等で構成され、APEX(根尖孔位置),W.L(作業長:根管長)が表示され、根管長測定針1の先端が根尖孔位置に達した時に、アラーム等が鳴るようになっている。(なお、根尖孔位置を電気的に検出する方法としては、多数の公報が公開されているので、その詳細については省略する)。
FIG. 2 is a main part configuration diagram for explaining an example of a conventional apical hole position detecting device, in which 1 is a apical position (or root canal length) measuring needle (reamer or file), 2 is Tooth whose root apex position (or root canal length) is to be measured, 3 is a root canal, 4 is a stopper provided on the measuring needle 1 so as to be movable in the axial direction, 5 is a lip, 6a is a clip for the measuring needle 1 7 is a counter electrode to the measurement electrode 6a, 8 is a measurement electrode lead wire communicating with the measurement electrode 6a, 9 is a counter electrode lead wire communicating with the counter electrode 7 hooked on the lip 5, and 10 is a tip. Measuring needle clip holder containing the measuring electrode wire 6 (see FIG. 4) having the electrode 6a in its part, 20 is a root canal length measuring instrument to which the lead wires 8 and 9 are connected, and 21 is apical position detection display As is well known, the measuring electrode 6 is attached to the measuring needle (file or reamer) 1. The tip of the measuring needle 1 has reached the apical position from the pointer position of the apical position detecting display 21 when the measuring needle 1 is inserted into the root canal 3 with the Know and move the stopper 4 to the position where it hits the crown of the tooth 2 in that state, take the measuring needle 1 out of the mouth in that state, and measure the length from the tip of the measuring needle 1 to the stopper 4 with a ruler. Yes (for example, see Patent Document 1). The display unit 21 is composed of, for example, an LED, a liquid crystal, and the like. L (work length: root canal length) is displayed, and an alarm or the like sounds when the tip of the root canal length measuring needle 1 reaches the apical position. (In addition, since many gazettes are open | released as a method of detecting an apical hole position electrically, the detail is abbreviate | omitted).

図3は、図2に示した測定針クリップホルダ10の使用例を説明するための図、図4は、図3に示した測定針クリップホルダ10の断面構成図で、図中、10はリーマ又はファイル等の根管長測定針1を測定電極6aと協働してクリップする先端部を有する測定針クリップホルダで、周知のように、根管長測定針1は、導電性の針部材1a,刃部1b,把持部1c等から成り、リーマ又はファイルから成る測定針1を用いて根管を拡大しながら根管長を測定できるもので、根管長を測定する場合、ラバーストッパ4と把持部1cの間を測定電極6aで保持し、測定針1を電気的根管長測定の際の一方の電極の信号取り付け部としている。この電気的な根管長の測定により、根管長が検出できたら、ラバーストッパ4を移動させて、根管長を測定針1のラバーストッパ4の位置に移して読んでいた。   3 is a diagram for explaining an example of use of the measuring needle clip holder 10 shown in FIG. 2. FIG. 4 is a cross-sectional configuration diagram of the measuring needle clip holder 10 shown in FIG. Alternatively, as is well known, the root canal length measuring needle 1 is a conductive needle member 1a having a distal end portion that clips the root canal length measuring needle 1 such as a file in cooperation with the measuring electrode 6a. , Blade portion 1b, gripping portion 1c, etc., and can measure the root canal length while enlarging the root canal using the measuring needle 1 made of reamer or file. When measuring the root canal length, The gap between the gripping portions 1c is held by the measurement electrode 6a, and the measurement needle 1 is used as a signal attachment portion of one electrode when measuring the electrical root canal length. When the root canal length was detected by this electrical root canal length measurement, the rubber stopper 4 was moved, and the root canal length was moved to the position of the rubber stopper 4 of the measuring needle 1 and read.

測定電極線6は、図4に示すように、絶縁性の測定針クリップホルダ筒11内に挿通され、その端部は、機械的には、押圧部材12に固定され、電気的にはリード線8に接続され、該リード線8を通して図2に示した根管長(根尖位置)測定器20に導かれている。一方、ホルダ筒11の端部11aは大径に形成され、この大径部11a内にスプリング13が挿入されている。従って、押圧部材12を矢別A方向に押すと、スプリング13が圧縮され、測定電極線6が矢印A′方向に移動し、従って、ホルダ筒11の先端部11bと測定電極線6の先端の電極部6aとの間に測定針1を挿入することができ、押圧部材12の押圧力を解除すると、測定電極線6は、スプリング13の復元力によって矢印B′方向に移動し、従って、図4に示したように、ホルダ筒11の先端部11bと測定電極線6の測定電極6aとの間に測定針1を狭持(クリップ)することができる。   As shown in FIG. 4, the measuring electrode wire 6 is inserted into an insulating measuring needle clip holder tube 11, and its end is mechanically fixed to the pressing member 12, and electrically leads. 8 and led to a root canal length (apical position) measuring instrument 20 shown in FIG. On the other hand, the end portion 11a of the holder cylinder 11 is formed with a large diameter, and a spring 13 is inserted into the large diameter portion 11a. Therefore, when the pressing member 12 is pushed in the direction of arrow A, the spring 13 is compressed, and the measurement electrode wire 6 moves in the direction of arrow A ′. Therefore, the tip 11b of the holder tube 11 and the tip of the measurement electrode wire 6 are moved. When the measuring needle 1 can be inserted between the electrode portion 6a and the pressing force of the pressing member 12 is released, the measuring electrode wire 6 is moved in the direction of the arrow B ′ by the restoring force of the spring 13, and accordingly, FIG. As shown in FIG. 4, the measuring needle 1 can be clamped between the distal end portion 11 b of the holder tube 11 and the measuring electrode 6 a of the measuring electrode wire 6.

特開2008−68015号公報JP 2008-68015 A

上述のごとき根管長測定を行うに際し、測定針としてリーマ、ファイル等を用いて、測定針1の把持部1cを親指と人差し指で持って該測定針を上下動して更には回動して根管の拡大等の作業も行うが、ホルダ筒11が樹脂で構成されているため、測定針1を回転させることによって、該ホルダ筒の先端部11bが削れてしまい、測定針(リーマ或いはファイル)1を保持する保持力が低下し、更には、削れた箇所からホルダ筒内へ異物が混入しやすくなる等の問題があった。   When performing root canal length measurement as described above, using a reamer, file, or the like as a measurement needle, hold the gripping portion 1c of the measurement needle 1 with a thumb and an index finger, and move the measurement needle up and down to further rotate it. Although operations such as enlarging the root canal are also performed, since the holder tube 11 is made of resin, rotating the measuring needle 1 causes the tip 11b of the holder tube to be scraped, resulting in a measuring needle (reamer or file). ) There is a problem that the holding force for holding 1 is reduced, and foreign matters are easily mixed into the holder cylinder from the shaved portion.

本発明は、上述のごとき実情に鑑みてなされたもので、根管長測定針をクリップ保持するホルダ筒の先端部表面を金属でコーティングすることによって、該ホルダ筒の先端部が、測定針(リーマ又はファイル)の回転によって削れてしまうのを防止するようにしたものである。
The present invention has been made in view of such circumstances described above, therefore the tip surface of the holder tube to clip holding the root canal length measuring needle be coated with a metal, the tip portion of the holder barrel, measuring stylus It is intended to prevent scraping due to rotation of the (reamer or file).

上記課題を解決するために、請求項1の発明は、導電性の根管長測定針をクリップして前記根管長測定針の先端が根尖に達したことを電気的に検出し、その時の前記根管長測定針の根管内への押入深さを該測定針に摺動自在に設けられたストッパに置き換え、該測定針の先端から該ストッパまでの長さより根管長を測定する歯科用根管長測定器において、先端部に前記測定針に接触されるクリップ部を有する測定電極線と、該測定電極線が挿通され、先端部が前記測定電極線のクリップ部と協働して前記根管長測定針を保持する樹脂製の測定針クリップホルダ筒とから成り、該測定針クリップホルダ筒の先端部外表面が金属コーティングされていることを特徴としたものである。   In order to solve the above problems, the invention of claim 1 is to electrically detect that the tip of the root canal length measuring needle has reached the apex by clipping a conductive root canal length measuring needle, The depth of penetration of the root canal length measuring needle into the root canal is replaced with a stopper slidably provided on the measuring needle, and the root canal length is measured from the length from the tip of the measuring needle to the stopper. In a dental root canal length measuring instrument, a measurement electrode wire having a clip portion that is in contact with the measurement needle at a tip portion, the measurement electrode wire is inserted, and the tip portion cooperates with a clip portion of the measurement electrode wire. And a measuring needle clip holder tube made of resin for holding the root canal length measuring needle, and the outer surface of the tip end portion of the measuring needle clip holder tube is metal-coated.

本発明によると、ファイル、リーマ等からなる根管長測定針(リーマ或いはファイル)を回転しても、ホルダ筒の先端部が削れるようなことはなく、従って、根管長測定針(リーマ或いはファイル)を保持する保持力の低下、ホルダ筒への異物の混入を防ぐことができる。また、先端部が削れないので、見た目にも良好な状態を保つことができる。   According to the present invention, even if a root canal length measuring needle (reamer or file) made of a file, a reamer or the like is rotated, the tip of the holder tube is not scraped. (Holding of the file) can be prevented, and foreign matter can be prevented from entering the holder tube. In addition, since the tip portion cannot be cut, it is possible to maintain a good appearance.

本発明による歯科用根管長測定器の一例を説明するための図である。It is a figure for demonstrating an example of the dental root canal length measuring device by this invention. 従来の歯科用根管長測定器の一例を説明するための要部構成図である。It is a principal part block diagram for demonstrating an example of the conventional dental root canal length measuring device. 図2に示した測定針クリップホルダ10の使用例を説明するための図である。It is a figure for demonstrating the usage example of the measuring needle clip holder 10 shown in FIG. 図3に示した測定針クリップホルダ10の断面構成図である。It is a cross-sectional block diagram of the measurement needle clip holder 10 shown in FIG.

図1は、本発明による歯科用根管長測定器の一実施例を説明するための要部全体構成図で、図中、図2乃至図4に示した従来技術と同様の作用をする部分には同一の参照番号を付し、それらに関する説明は省略する。
図1において、11’は樹脂製のホルダ筒11の先端部(特に、図4に示したホルダ筒11の先端11bを含む部分)を金属で被覆(コーティング)した部分で、該先端部11’の表面を金属とすることにより、該先端部に根管長測定針(リーマ或いはファイル)1を接触して上下動更には回動させたとしても、該金属表面部が削れるようなことはなく、従って、根管長測定針1をクリップする保持力が低下するようなこともなく、また、削れることによって生じる異物がホルダ筒11内へ混入することもない。また、ホルダ筒が削れないため、見た目にも良い状態を保つことができる。
FIG. 1 is an overall configuration diagram of a main part for explaining an embodiment of a dental root canal length measuring device according to the present invention. In FIG. 1, a part having the same operation as that of the prior art shown in FIGS. Are denoted by the same reference numerals, and description thereof will be omitted.
In FIG. 1, 11 ′ is a portion in which the tip of the resin holder tube 11 (particularly, the portion including the tip 11b of the holder tube 11 shown in FIG. 4) is coated (coated) with the metal. By making the surface of the metal a metal, even if the root canal length measuring needle (reamer or file) 1 is brought into contact with the tip and moved up and down and further rotated, the metal surface is not scraped. Therefore, the holding force for clipping the root canal length measuring needle 1 does not decrease, and foreign matter generated by scraping does not enter the holder tube 11. Further, since the holder tube cannot be cut, it can be kept in a good appearance.

1…根管長測定針、4…ストッパ、10…測定針クリップホルダ、11…ホルダ筒、11’…ホルダ筒先端部の金属部。 DESCRIPTION OF SYMBOLS 1 ... Root canal length measuring needle, 4 ... Stopper, 10 ... Measuring needle clip holder, 11 ... Holder cylinder, 11 '... Metal part of a holder cylinder front-end | tip part.

Claims (1)

導電性の根管長測定針をクリップして前記根管長測定針の先端が根尖に達したことを電気的に検出し、その時の前記根管長測定針の根管内への押入深さを該測定針に摺動自在に設けられたストッパに置き換え、該測定針の先端から該ストッパまでの長さより根管長を測定する歯科用根管長測定器において、先端部に前記測定針に接触されるクリップ部を有する測定電極線と、該測定電極線が挿通され、先端部が前記測定電極線のクリップ部と協働して前記根管長測定針を保持する樹脂製の測定針クリップホルダ筒とから成り、該測定針クリップホルダ筒の先端部外表面が金属コーティングされていることを特徴とする歯科用根管長測定器。
A conductive root canal length measuring needle is clipped to electrically detect that the tip of the root canal length measuring needle has reached the apex, and the depth of penetration of the root canal length measuring needle into the root canal at that time In a dental root canal length measuring instrument that measures the root canal length from the length from the tip of the measuring needle to the stopper, the length of the measuring needle is replaced with a stopper slidably provided on the measuring needle. A measuring electrode wire having a clip portion to be in contact with the measuring electrode wire, and a resin measuring needle through which the measuring electrode wire is inserted and whose tip portion cooperates with the clip portion of the measuring electrode wire to hold the root canal length measuring needle A dental root canal length measuring instrument comprising a clip holder tube, wherein the outer surface of the tip of the measuring needle clip holder tube is coated with metal.
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CN102631252A (en) * 2012-05-09 2012-08-15 四川大学 Measuring needle for working length of root canal

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JPH0746897Y2 (en) * 1985-05-27 1995-10-25 三菱電線工業株式会社 Hikari fiberscope
JPH0710736Y2 (en) * 1991-10-02 1995-03-15 株式会社モリタ製作所 Dental root canal instrument holder
JP3681781B2 (en) * 1995-02-08 2005-08-10 オリンパス株式会社 Electronic endoscope
JP3103325B2 (en) * 1997-07-24 2000-10-30 株式会社長田中央研究所 File clip holder for apical hole position detection
JP2001309932A (en) * 2000-05-01 2001-11-06 Seirenji Trading Kk File holder
DE102005034010A1 (en) * 2005-07-18 2007-01-25 Coltène/Whaledent GmbH + Co. KG Root canal instrument with abrasive coating and method of making the same

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