JP2012055459A - Dental root canal length measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally provide a mechanism, which pushes down the stopper provided to a measuring needle in a freely slidable manner, to a clip holder and to make it possible to push down the stopper by one finger of the hand, which has the clip holder, not only to simplify the push-down operation of the stopper but also to facilitate root canal length measuring work.SOLUTION: A conductive root canal length measuring needle 1a is clipped to electrically detect that the tip of the root canal length measuring needle reaches the root apex and the push-in depth of the root canal length measuring needle into the root canal 3 at this time is replaced with the stopper 4 provided to the root canal length measuring needle in a freely slidable manner to measure the length of the root canal from the length from the tip of the measuring needle 1a to the stopper 4. A measuring electrode wire having a clip part 6a, which is brought into contact with the measuring needle 1a, provided to the tip part thereof and a measuring needle clip holder cylinder 11, through which the measuring electrode wire is inserted, are provided and the measuring needle clip holder cylinder 11 has the operation lever 30 piercing through the holder cylinder 11 in the up and down directions crossing the holder cylinder 11 at a right angle to move and a stopper push-down member 32 coming into contact with the upper surface of the stopper 4 to downward push down the stopper is provided to the lower end of the operation lever 30.

Description

  The present invention relates to a tooth-based root canal length measuring device, more specifically, by electrically detecting 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 intrusion of the root canal length measuring needle into the root canal at that time is pushed down to a position where the stopper slidably provided on the measuring needle hits the crown, and from the tip of the measuring needle to the stopper. In the tooth rooting length measuring device that replaces the length and measures, the mechanism for pressing down the stopper is provided integrally with the root canal length measuring tool so that the pressing operation of the stopper can be performed easily and easily. The present invention relates to a dental root canal length measuring device.

  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 this 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).

  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 (see, for example, 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 published as a method of electrically detecting the apical hole position, including Patent Document 2, the details thereof are omitted).

  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.

  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 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 a can be held (clipped) between the tip end portion 11 b of the holder tube 11 and the measuring electrode 6 a of the measuring electrode wire 6.

JP 2008-68015 A Japanese Patent Publication No. 62-2187

  In performing root canal length measurement as described above, after detecting that the tip of root canal length measurement has reached the apex, the operator pushes the stopper 4 down to the crown position using a finger or tweezers. However, since the clip holder is held in one hand at that time, the stopper must be pushed down with the other hand, which is difficult to operate.

The present invention has been made in view of the above-described circumstances, and a mechanism for pressing down the stopper is provided integrally with the measuring needle clip holder so that the stopper can be pressed down with one finger of the hand holding the clip holder. Therefore, the purpose is to simplify the operation of measuring the root canal length by simplifying the pressing operation of the stopper.

  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 device, the measuring needle clip holder includes a measuring electrode wire having a clip portion in contact with the measuring needle at a distal end portion, and a measuring needle clip holder tube through which the measuring electrode wire is inserted. The cylinder has an operation bar that moves through the holder cylinder in the vertical direction perpendicular to the holder cylinder, and the lower end of the operation bar is in contact with the upper surface of the stopper and presses the stopper downward. Characterized by having members A.

  The invention of claim 2 is characterized in that in the invention of claim 1, there is provided a spring member that always pushes up the operation bar upward, and the operation bar is pushed down against the extension force of the spring. is there.

  According to the present invention, a mechanism for pushing down the stopper is provided integrally with the clip holder so that the stopper can be pushed down with one finger of the hand holding the clip holder, thereby simplifying the pressing operation of the stopper, It was made for the purpose of facilitating long measurement work.

It is a figure for demonstrating an example of the dental root canal length measuring apparatus by this invention. It is a principal part block diagram for demonstrating an example of the conventional dental root canal length measuring apparatus. It is a figure for demonstrating the usage example of the measuring needle clip holder 10 shown in FIG. It is a cross-sectional block diagram of the measurement needle clip holder 10 shown in FIG.

  In FIG. 1A, reference numeral 30 denotes a stopper pushing-down operation bar added according to the present invention. The bar 30 is arranged at the tip of the measuring needle clip holder tube 11 so that the holder tube 11 is axially moved to the holder tube 11. The bar operation member 31 having a flat upper surface suitable for pressing down the bar 30 is provided at the upper end portion thereof, and the bar operation member 31 is provided at the lower end portion thereof. When the bar 30 is pressed down and moved downward, a stopper push-down member 32 is provided that contacts the upper surface of the stopper 4 and pushes the stopper 4 downward. Therefore, as described above, when the apex position is detected, the bar operating member 31 can be pushed down and the stopper 4 can be pushed down to the crown position by the stopper push-down member 32.

  When the measuring needle 1 is attached to the measuring needle clip holder cylinder 11, the intended purpose cannot be achieved if the stopper pressing member 32 is positioned below the stopper 4, so that the stopper pressing member 32 can be used as much as possible. It is easier to use if it is positioned above the stopper 4. Therefore, for example, as shown in a cross section in FIG. 1B, a spring 40 is interposed between the holder cylinder 11 and the bar operation member 31, and the stopper push-down member 32 is placed above the stopper 4 by the spring 40. It is good to be located.

DESCRIPTION OF SYMBOLS 1 ... Rootmaster measuring needle, 4 ... Stopper, 10 ... Measuring needle clip holder, 11 ... Holder cylinder, 30 ... Bar for stopper pushing down, 31 ... Bar operation member, 32 ... Stopper pushing member, 40 ... Spring

The present invention, Dental root canal length measuring device, and more particularly, conducting root canal length measuring needle clip to electrically detect that the tip of the root canal length measuring needle reaches the apex Then, the depth of intrusion into the root canal of the root canal length measuring needle at that time is pushed down to a position where the stopper slidably provided on the measuring needle hits the crown, from the tip of the measuring needle to the stopper. in the root canal length measuring device for dental which is adapted to measure by replacing the length of, a mechanism for pushing down the stopper integrally with the root canal length measuring instrument, and perform work depression of the stopper and easily simply about the root canal length measuring device for dental you like.

1 ... root canal length measuring needle, 4 ... stopper, 10 ... measuring needle clip holder, 11 ... holder tube, 30 ... stopper depressed bar, 31 ... bar operating member 32 ... stopper depressing member, 40 ... spring.

Claims (2)

  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 apparatus that measures the root canal length from the length from the tip of the measuring needle to the stopper by replacing it with a stopper slidably provided on the measuring needle, A measuring electrode wire having a clip portion that is in contact with the measuring electrode wire, and a measuring needle clip holder tube through which the measuring electrode wire is inserted. The measuring needle clip holder tube is arranged in a vertical direction perpendicular to the holder tube. A dental root canal length measuring device, comprising: an operation bar that moves through the operation bar; and a lower end of the operation bar having a stopper push-down member that contacts the upper surface of the stopper and pushes the stopper downward. .   The dental root canal length measuring apparatus according to claim 1, further comprising a spring member that constantly pushes up the operation bar, the operation bar being pushed down against an extension force of the spring.

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