JP5361822B2 - Dental root canal length measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform root canal length measuring work by eliminating the load and timewise waste of an operator accompanied by the replacement of a measuring needle in the root canal length measuring work to shorten the working time of the operator. <P>SOLUTION: The root canal length measuring instrument is composed of two root apex position detecting measuring clip holders 10<SB POS="POST">1</SB>and 10<SB POS="POST">2</SB>, through which root apex position detecting lead wires having electrodes for clipping the conductive measuring needles (1<SB POS="POST">1</SB>, 1<SB POS="POST">2</SB>) inserted in the root canal provided to the leading ends thereof are inserted. Electricity is fed to the measuring needles 1<SB POS="POST">1</SB>, 1<SB POS="POST">2</SB>through the lead wires 8<SB POS="POST">1</SB>and 8<SB POS="POST">2</SB>while the measuring needle (1<SB POS="POST">1</SB>or 1<SB POS="POST">2</SB>) is inserted in the root canal and the length of the root canal is measured from the insertion depth of the same. The end parts of electricity feed wires for feeding electricity to the lead wires 8<SB POS="POST">1</SB>and 8<SB POS="POST">2</SB>of the respective measuring needle clip holders 10<SB POS="POST">1</SB>and 10<SB POS="POST">2</SB>are connected to a single connection terminal 15 and the connection terminal 15 is connected to the adaptor 22 of the root canal length measuring instrument or the adaptor 16 of the cord wire 8 connected to the root canal length measuring instrument in a freely detachable manner. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a dental root canal length measuring instrument, and more specifically, to a root canal length measuring needle after detecting the position of the apical hole in root canal length measurement performed during root canal treatment. Measurement used to clip the root canal length measuring needle in a root canal length measuring device that measures the position of the stopper, that is, the length from the tip of the root canal length measuring needle to the stopper (root canal length) It has two needle clip holders in parallel, and while the surgeon is measuring the root canal length using one holder, the assistant can attach another measuring needle to the other holder and replace the measuring needle. The burden on the surgeon is reduced.

  In root canal treatment, prior to 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, and in that state, root canal length measurement is performed. The position of the stopper inserted through the needle is brought into contact with the crown, and in this state, the root canal length measuring needle is pulled out from the root canal, and the length from the tip of the root canal length measuring needle to the stopper using a ruler or the like. Root canal length is obtained by measuring (root canal length).

  FIG. 2 is a main part configuration diagram for explaining an example of apical position detecting device to which the present invention is applied. In the figure, 1 is a apical position (or root canal length) measuring needle (reamer or file). ) 2 is a tooth to be measured for apical position (or root canal length), 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, and 6a is a measurement Measuring electrode for clipping the needle 1, 7 is a counter electrode for the measuring electrode 6 a, 8 is a measuring electrode lead wire communicating with the measuring electrode 6 a, and 9 is a lead electrode for counter electrode communicating with the counter electrode 7 hooked on the lip 5. Reference numeral 10 denotes a measuring needle clip holder that houses the measuring electrode wire 6 (see FIG. 4) having the electrode 6a at the tip, 20 denotes a root canal length measuring instrument to which the lead wires 8 and 9 are connected, and 21 denotes a root apex. As is well known in the hole position detection display section, the measuring needle (file or reamer) With the electrode 6a in contact, 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. In this state, the stopper 4 is moved to a position where it hits the crown of the tooth 2, and in that state, the measuring needle 1 is taken out of the oral cavity, and the length from the tip of the measuring needle 1 to the stopper 4 is measured with a ruler. (For example, refer to 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, and FIG. 4 is a cross-sectional configuration diagram of the measuring needle holder 10 shown in FIG. As is well known, the root canal length measuring needle 1 is a conductive needle, which is a measuring needle (file) clip holder having a tip portion for clipping the root canal length measuring needle 1 such as a file in cooperation with the measuring electrode 6a. When measuring the root canal length using the measuring needle 1 consisting of a member 1a, a blade portion 1b, a gripping portion 1c, etc., consisting of a reamer or a file, the measurement electrode 6a holds between the rubber stopper 4 and the grasping portion 1c, A signal attachment portion of one electrode at the time of electrical root canal length measurement using the measuring needle 1 as one electrode is used. 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 measurement electrode wire 6 is inserted into an insulating protective tube 11, and its end is mechanically fixed to the pressing member 12 and electrically connected to the lead wire 8. Then, the lead wire 8 is led to a root canal length (apical position) measuring device 20 shown in FIG. On the other hand, the end portion 11a of the protective tube 11 is formed with a large diameter, and a spring 13 is inserted into the large diameter portion 11a. Accordingly, 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 protective 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. 3, the measuring needle 1 can be clamped (clipped) between the distal end portion 11 b of the protective tube 11 and the measuring electrode 6 a of the measuring electrode wire 6.

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

  When performing root canal length measurement as described above, use a reamer, file, etc. as a measuring needle to perform root pulp, root canal enlargement, etc. In this case, gradually replace the reamer and file with ones of larger size. However, the number of exchanges is large, and there is a problem that the doctor (doctor) takes time for the exchange work and the medical treatment is not effectively performed.

  The present invention has been made in view of the above circumstances, and has two root canal length measuring needle clip holders provided in parallel, and the operator has a root canal length measuring needle mounted on one holder ( While performing root canal length measurement using a reamer or file, the assistant can equip the other holder with the root canal length measuring needle (reamer or file) to be used next, so that root canal length measurement is possible. This eliminates the waste of time associated with needle replacement and shortens the time required for medical care.

  In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that a lead wire for detecting the apex position having an electrode for clipping a conductive measuring needle inserted into the root canal at the tip, and the lead wire are inserted. A protective tube, a rear end portion of the lead wire at the rear end of the protective tube, and a pressing member capable of pushing the lead wire forward, and normally, the pressing member is pushed back backward to form the lead A measuring needle clip holder for detecting the apex position that clips the measuring needle between the electrode of the wire and the tip of the protective tube, supplying electricity to the measuring needle through the lead wire, and measuring the measuring needle In a root canal length measuring apparatus in which a needle is inserted into a root canal and the root canal length is measured from the insertion depth, the two measuring needle clip holders for detecting the apex position are arranged in parallel, and each measurement is performed. Needle clip An end of an electric supply line for supplying electricity to the lead wire of the rudder is connected to a single connection terminal, and the connection terminal is connected to an adapter of a root canal length measuring device or a cord wire connected to the root canal length measuring device It is characterized by being detachably connected to the adapter.

  The invention according to claim 2 is the invention according to claim 1, wherein the two measuring needle clip holders for detecting apex position are electrically connected in parallel at the single connection terminal, The measuring needle clip holder can be used at the same time.

  According to the present invention, in root canal length measurement work, it is possible to eliminate the burden on the operator associated with the replacement of the measuring needle, and to eliminate the waste of the operator's time associated with the replacement of the measuring needle. The root canal length can be measured efficiently.

It is a figure for demonstrating an example of the needle clip holder for root canal length measurement by this invention. It is a principal part block diagram for demonstrating an example of the apical hole position detection apparatus with which this invention is applied. 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.

FIG. 1 is a block diagram for explaining an embodiment of a root canal length measuring apparatus according to the present invention. In the figure, the same function as the conventional root canal length measuring apparatus shown in FIGS. Are given the same reference numbers. 1, 10 ₁ and 10 ₂ are measuring needle clip holders having the same structure and function as the measuring needle clip holder 10 shown in FIGS. 2 to 4, and 8 ₁ and 8 ₂ respectively correspond to the lead wires 8. Lead wire. The lead wires 8 ₁ and 8 ₂ are electrically connected in parallel to a single connection terminal 15, and the connection terminal 15 may be directly connected to an adapter 22 provided in the root canal length measuring instrument 20. , Or may be connected to an adapter 16 provided on the lead wire 8 connected to the adapter 22 of the root canal length measuring instrument. The counter electrode 7 may be directly connected to the lead electrode 9 for the counter electrode, but may be detachably connected via the connectors 15 ₁ and 16 ₁ as shown in the figure. If detachably connected to the sterilizer, sterilization work such as autoclave can be easily performed.

As described above, in the present invention, the two measuring needle clip holders 10 ₁ and 10 ₂ are provided in parallel, and the surgeon measures the root canal length using _one holder (for example, 10 ₁ ). while you are (e.g., while the expansion work of the root canal), the assistant other measurement needle clip holder (e.g., 10 _2), the wearing thick other measurements needle 1 ₂ a more diameter Thus, the surgeon can effectively perform the root canal length measurement operation without the burden associated with the replacement of the measuring needle and without wasting time.

1, 1 ₁ , 1 ₂ ... Root canal length measuring needle, 2 ... Tooth, 3 ... Root canal, 4 ... Stopper, 6 ... Measuring electrode wire, 6a ... Measuring electrode, 10, 10 ₁ , 10 ₂ ... Measuring needle clip holder 11 ... Electrode wire protective tube for measurement.

Claims (2)

  A lead wire for detecting the apex position having an electrode for clipping a conductive measuring needle inserted into the root canal at the tip, a protection tube through which the lead wire is inserted, and the lead wire at the rear end of the protection tube A pressing member that fixes the rear end of the lead wire and pushes the lead wire forward, and normally, the measurement is performed between the electrode of the lead wire and the tip of the protective tube by pushing the push member backward. It comprises a measuring needle clip holder for detecting the apex position that clips the needle, supplies electricity to the measuring needle through the lead wire, inserts the measuring needle into the root canal, and determines the root from the insertion depth. In the root canal length measuring apparatus configured to measure the tube length, an electric supply that has two measuring needle clip holders for detecting the apex position in parallel and supplies electricity to the lead wires of the measuring needle clip holders. The end of the cable is connected to a single connection terminal, and the connection terminal is detachably connected to the adapter of the root canal length measuring device or the adapter of the cord wire connected to the root canal length measuring device. Dental root canal length measuring device characterized by   The two apex position detection measuring needle clip holders are electrically connected in parallel at the single connection terminal, and both apex position detection measuring needle clip holders can be used simultaneously. The dental root canal length measuring apparatus according to claim 1.

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