JP2012019849A - Dental root canal length measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform a series of operation of measuring root canal length in dental treatment without imposing a burden on an operator.SOLUTION: The dental root canal length measuring instrument clips a root canal length measuring needle 1 formed of a conductive needle member with a measuring electrode (file clip) 6a, inserts the root canal length measuring needle 1 into a root canal 3, electrically detects that the tip has reached a root apex, and measures the current length of the root canal length measuring needle 1 pushed into the root canal by transferring the length to a stopper 4 provided in the measuring needle 1. The dental root canal length measuring instrument has a measuring electrode wire 6 having a clip portion 6a in contact with the measuring needle 1 and a file clip holder 10 (protective tube 11) into which the measuring electrode wire 6 is inserted at the tip portion. The instrument has a scale to measure the length of the root canal on the outer surface of the file clip holder 10 (protective tube 11).

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. Clip the root canal length measuring needle when detecting the position of the apical hole, the scale 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) The present invention relates to a dental root canal length measuring device that is integrally provided on the surface of a measuring needle clip holder used for this purpose.

  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 Electrode (file clip for clipping the measuring needle 1), 7 is a counter electrode, 8 is a lead wire for measurement electrode communicating with the measurement electrode 6a, 9 is a lead wire for counter electrode communicating with the counter electrode 8 hooked on the lip 5 Reference numeral 10 denotes a file clip holder in which the measurement electrode wire 6 (see FIG. 4) having the file clip 6a at the tip portion is housed, 20 denotes a root canal length measuring instrument to which the lead wires 8 and 9 are connected, and 21 denotes a root apex. In the hole position detection display section, as is well known, ) When the measuring needle 1 is inserted into the root canal 3 with the file clip 6a in contact with 1, the tip of the measuring needle 1 is located at the tip of the apex position of the apical position detection display unit 21. Knowing that it has reached the position, move the stopper 4 to the position where it hits the crown of the tooth 2 in that state, take it 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 (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 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 file clip holder 10 shown in FIG. 2. FIG. 4 is a cross-sectional configuration diagram of the file clip holder 10 shown in FIG. 3. In FIG. 3, 10 is a reamer or file. As is well known, the root canal length measuring needle 1 is a conductive electrode clip holder that has a tip portion that clips the root canal length measuring needle 1 in cooperation with the measuring electrode (file clip) 6a. When measuring the root canal length using the measuring needle 1 made of a reamer or a file, the measuring electrode 6a is provided between the rubber stopper 4 and the grasping portion 1c. And a signal attachment portion of one electrode in measuring the electrical root canal length using the measuring needle 1 as one electrode. 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 transferred to the measuring needle 1 and read.

  As shown in FIG. 4, the measurement electrode wire 6 is inserted into an insulating protective tube 11 (file clip holder 10), and its end is mechanically fixed to the pressing member 12 and electrically Is connected to the lead wire 8 and led to the root canal length (apical position) measuring instrument 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 clip portion 6a and the pressing force of the pressing member 12 is released, the measuring electrode wire 6 moves 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 between the distal end portion 11 b of the protective tube 11 and the distal end clip portion 6 a of the measurement electrode wire 6.

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

  As described above, conventionally, root canal length is measured by inserting a root canal length measuring needle until its tip reaches the apical hole, and in that state, a stopper inserted through the measuring needle is brought into contact with the crown. After that, the measuring needle is pulled out from the root and the distance (length) from the tip of the measuring needle to the stopper is measured using a ruler or the like, but the ruler is not always at hand, The ruler also had to be sterilized, and its management was troublesome.

  In the invention described in Patent Document 1, it has been proposed to attach a ruler to the root canal length measuring instrument 20. In this case, the measure is close to the stopper that has been replaced with the measuring needle 1. In measuring the length, the operator must move the body and hold the measuring needle 1 in front of the scale of the root canal length measuring instrument 20, and the scale part of the root canal length measuring instrument. Must be sterilized, and the use is not always sufficient.

  The present invention has been made in view of the above circumstances, and in root canal length measurement work in dental treatment, the length of the root canal transferred to the root canal length measuring needle (file) is measured at the time of root canal length measurement. To be able to read by the scale provided on the surface of the file clip holder (protection tube into which the measurement electrode wire is inserted) that holds the root canal length measuring needle, and to put a burden on the operator for a series of root canal length measurement work In addition, the file clip holder can be sterilized by sterilizing the file clip holder at the same time so that the root canal length can be measured hygienically.

  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. A dental root canal length measuring instrument comprising: a measuring electrode wire having a clip portion that is brought into contact with the measuring needle at a tip portion; and a measuring needle clip holder through which the measuring electrode wire is inserted; It has a scale for reading the root canal length on the outer surface.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the root canal length is a length from the tip of the measuring needle to the stopper.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the scale is characterized in that the leading end of the file clip holder is based on zero.

  According to the present invention, a series of root canal length measurement operations in dental treatment can be performed efficiently and hygienically without placing a burden on the operator.

It is a figure for demonstrating one Example of the root canal length measuring device by this invention. It is a figure for demonstrating the usage example of the root canal length measuring apparatus with which this invention is applied. It is a figure for demonstrating the usage example of the file clip holder 10 shown in FIG. It is a figure which shows the cross-sectional structure of the file clip holder 10 shown in FIG.

  FIG. 1 is a schematic configuration diagram for explaining an embodiment of a root canal length measuring device according to the present invention. In FIG. 1A, 1 is a root canal length measuring needle (file, reamer), 2 is a tooth, 3 is a root canal, 4 is a stopper, 6a is a file clip (measuring electrode), 10 is a measuring needle (file) clip holder, and as is well known, the file clip (measuring electrode) 6a contacts the measuring needle (file) 1 In this state, the measuring needle 1 is inserted into the root canal 3, and it is known that the tip of the measuring needle 1 has reached the apex position by the position of the pointer of the apex position detection indicator 20 described above. Then, the stopper 4 is moved to a position where it hits the crown of the tooth 2 and is taken out of the oral cavity in that state, and the length from the tip of the root canal length measuring needle 1 to the stopper 4 is measured with a ruler.

  As described above, in measuring the root canal length, the ruler is an indispensable part. However, if the ruler is not sufficiently managed, the ruler must be worried every time. In the case where the place is provided, the operator has to move the body to the place, and a series of root canal length measurement operations cannot be performed efficiently. Also, the ruler had to be sterilized, which was a difficult task.

  The present invention has been made in view of the above circumstances, and as shown in FIG. 1B, a scale is provided on the surface of the file clip holder 10 (the protective tube 11 of the measurement electrode wire 6). The root canal length replaced with the measuring needle (file) 1 is measured using a scale. If the scale is scaled with the tip of the file clip holder 10 as the zero reference, the stopper 4 is aligned with the tip of the file clip holder 10 so that the measurement can be easily performed.

  As described above, according to the present invention, when measuring the root canal length, the root canal is measured using a scale (scale) provided on the file clip holder that the operator holds in his / her hand to detect the apical position. Since the root canal length replaced with the long measuring needle can be measured, the operator can perform the root canal length measuring work immediately after taking out the measuring needle from the tooth root using a ruler at hand. Further, by sterilizing the file clip holder, the ruler (scale) is sterilized at the same time, so that the root canal length can be measured more hygienically.

DESCRIPTION OF SYMBOLS 1 ... Root canal length measuring needle (file), 2 ... Tooth, 3 ... Root canal, 4 ... Stopper, 6 ... Measurement electrode wire, 6a ... File clip (measurement electrode), 10 ... File clip holder, 11 ... Measurement electrode Wire protection tube.

Claims (3)

  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 line having a clip portion in contact with the measuring electrode line and a measuring needle clip holder through which the measuring electrode line is inserted, and having a scale for reading the root canal length on the outer surface of the measuring needle clip holder Dental root canal length measuring instrument characterized by.   The dental root canal length measuring instrument according to claim 1, wherein the root canal length is a length from the tip of the measuring needle to the stopper.   The dental root canal length measuring instrument according to claim 1 or 2, wherein the scale is based on a leading end of the file clip holder as a zero reference.

Images