JP2008068016A - Dental root canal length measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To magnify and display a display part by providing a lens for magnifying and displaying the display part of a root canal length measuring apparatus and to measure the position (root canal length) of a stopper held by a root canal length measuring needle by a scale by providing the scale on the lens. <P>SOLUTION: On the front surface of the root tip hole position detection display part 11 of the root canal length measuring apparatus 10, a magnifying lens 20 is provided. The magnifying lens 20 is provided with a dimension scale extending in a horizontal direction. The dimension scale comprises a scale 21R for a right-handed operator extending to the left with the right end as 0 and a scale 21L for a left-handed operator extending to the right with the left end as 0. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has a dental root canal length measuring instrument, more specifically, an enlarged display lens that magnifies and displays the display part of the root canal length measuring instrument, and the enlarged display lens part is provided prior to root canal treatment. In the measurement of root canal length, the position of the stopper retained on the root canal length measuring needle after detecting the position of the apical hole, that is, the length from the tip of the root canal length measuring needle to the stopper (root canal The present invention relates to a dental root canal length measuring instrument that integrally has a scale for measuring the length.

  In root canal treatment, prior to root canal treatment, a root canal length measuring needle (file) is inserted into the root canal and the tip of the root canal reaches the position of the apical canal. In this state, the position of the stopper inserted into the root canal length measuring needle 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 using a ruler or the like, The length (root canal length) from the tip of the long measuring needle to the stopper is measured to obtain the root canal length.

FIG. 3 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 (file), 2 is a tooth to be measured for apical position (or root canal length), 3 is a root canal, 4 is a stopper, 5 is a lip, 6 is a measurement electrode (file holder), 7 is a counter electrode, 8 is a measurement electrode 6 is a lead wire for measurement electrode that communicates with 6, 9 is a lead wire for counter electrode that communicates with the counter electrode 7 hooked on the lip 5, 10 is a root canal length measuring instrument to which these lead wires 8 and 9 are connected, and 11 As is well known, the apex position when the measurement needle 1 is inserted into the root canal 3 with the file holder 6 in contact with the measurement needle (file) 1 at the apical position detection display unit. Knowing that the tip of the measuring needle 1 has reached the apical position from the position of the pointer on the position detection display 11, Moving the stopper 4 to the position corresponding to the crown of the tooth 2, taken out extraoral in that state, and measures the length from the tip of the root canal length measuring needles to the stopper with a ruler. The display unit 11 is composed of, for example, an LED, a liquid crystal, and the like. L (work length: root canal length) is displayed, and when the apex position is reached, an alarm or the like sounds. However, recently, the downsizing of the apparatus has progressed, and the apical position detection display unit 11 Is small, making it difficult to see the pointer. (In addition, as a method for electrically detecting the apical position, many publications such as Japanese Examined Patent Publication No. 62-2187 have been published, and the details thereof are omitted).
Japanese Patent Publication No. 62-2187

  As described above, conventionally, the root canal length is measured by observing the pointer on the apical position detecting display unit 11 of the root canal length measuring instrument 10 while the tip of the root canal length measuring needle reaches the apical hole (root Until the APEX of the apex position detection display 11 is reached), in that state, the stopper inserted through the measuring needle is brought into contact with the crown, and then the measuring needle is pulled out from the root of the measuring needle. The distance (length) from the tip to the stopper is measured using a ruler or the like, but the apical position detection display unit 11 of the root canal length measuring instrument is small, and therefore it is difficult to read the display unit. Moreover, the ruler is not always at hand, and its management is cumbersome.

  Also, when using a ruler, you must hold the measuring needle with one hand and hold the ruler with the other hand, and if the hand is unstable, the stopper may be moved with the ruler. Was bad.

  The present invention has been made in view of the above-mentioned circumstances. A lens for enlarging and displaying the display unit of the root canal length measuring instrument is provided to make the display unit easy to see, and the above-mentioned ruler is provided integrally with the lens. Measures can be easily and reliably managed, and measurement can be performed with one hand, making the measurement more reliable. Furthermore, it is easy to use for right-handed and left-handed surgeons. It was made for the purpose of providing a root canal length measuring instrument.

  The invention of claim 1 has a magnifying lens arranged on the front surface of the display unit of the root canal length measuring instrument, and the lens has a dimensional scale extending in the horizontal direction. It is characterized by comprising a scale extending toward the right and a scale extending rightward with the left end being 0.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the magnifying lens is provided integrally or detachably on the root canal length measuring instrument.

  According to a third aspect of the present invention, in the second aspect of the present invention, the magnifying lens is characterized in that the root canal length measuring device is detachably attached to a separate support member.

  The present invention has been made in view of the circumstances as described above, and has a lens for enlarging and displaying the display unit of the root canal length measuring device, and the lens unit (scale) is provided integrally with the lens, and the display unit Make it easier to see, manage the ruler more easily and more reliably, and make measurement with one hand possible to make the measurement more reliable, and for right-handed and left-handed operators The purpose of this is to provide an easy-to-use dental root canal length measuring instrument.

  FIG. 1 is an external view for explaining an embodiment of a root canal length measuring device according to the present invention. FIG. 1A is an external view of a root canal length measuring device before the present invention is applied, FIG. 1B is an external view showing a state when the magnifying lens according to the present invention is attached. In FIG. 1B, the portion having the same function as the prior art shown in FIG. The same reference numerals are attached, and using these, the operation until the root canal length is replaced with the position of the stopper 4 of the root canal length measuring needle 1 is the same as in the prior art shown in FIG. Done. At this time, in the present invention, the surgeon detects the root canal length while magnifying the apical position detecting display unit 11 of the root canal length measuring instrument 10 through the magnifying lens 20. In the case of the illustrated example, the root canal length measuring instrument 10 has a winding mechanism for winding the lead wires 8 and 9, so that a lead wire having a length suitable for the operator can be obtained. ing.

  The root canal length replaced with the length from the tip of the root canal length measuring needle 1 to the stopper 4 is measured using a ruler or the like in the prior art, but as described above, the management of the ruler is very difficult. Furthermore, during measurement, the measurement is generally performed with a measuring needle in one hand and a ruler in the other hand, and the measurement operation is unstable. For example, the stopper hits the ruler. There was a fear of being moved.

  Therefore, in the present invention, for example, a scale 21 is integrally provided on the surface of the magnifying lens 20 as shown in FIG. FIG. 1B shows an example in which a scale 21R for a right-handed operator is provided on the right side of the magnifying lens 20 and a scale 21L for a left-handed operator is provided on the left side of the magnifying lens 20 as scales. As shown in the figure, the scale 21R for the right-handed operator is scaled by extending the scale to the left with the right end set to 0 (scale). At the time of measurement, the operator holds the root canal length measuring needle 1. Holding the right hand, the stopper 4 is brought into contact with the right end (0 scale) of the scale portion from the right, and the root canal length can be known by reading the tip of the root canal length measuring needle 1 with the scale 21R. However, since this is difficult to use for a left-handed operator, a scale 21L is provided as a scale for a left-handed operator, with the left end set to 0 (scale) and extending to the right. The magnifying lens 20 may be provided integrally or detachably on the tip of the arm 30, and the arm 30 may be provided integrally or detachably on the root canal length measuring instrument 10. The scale may be provided below the magnifying lens 20.

  FIG. 2 is a diagram for explaining another lens suitable for use in the practice of the present invention. In this example, the lens 20 is mounted on a lens stand 40, and the lens 20 is measured for root canal length. The display unit 11 is disposed in front of the display unit 11 of the instrument 10 and the display unit 11 of the root canal length measuring instrument is enlarged and displayed through the lens 20.

It is an external view for demonstrating one Example of the root canal length measuring device with a magnifying lens by this invention. It is a figure for demonstrating the example of the root canal length measuring device which made the expansion lens of this invention a different body. It is a principal part block diagram for demonstrating an example of the apical hole position detection apparatus with which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Root canal length measuring needle, 2 ... Tooth, 3 ... Root canal, 4 ... Stopper, 5 ... Lip, 6 ... Measurement electrode, 7 ... Counter electrode, 8 ... Measurement electrode lead wire, 9 ... Counter electrode lead wire DESCRIPTION OF SYMBOLS 10 ... Root canal length measuring device, 11 ... Apical hole position detection display part, 20 ... Magnifying lens, 21, 21R, 21L ... Scale, 30 ... Magnifying lens mounting arm, 40 ... Magnifying lens mounting base.

Claims (3)

  A magnifying lens disposed in front of the display unit of the root canal length measuring instrument, the lens having a dimensional scale extending in the horizontal direction, the dimensional scale extending to the left with the right end as 0; A dental root canal length measuring instrument comprising a scale extending leftward with the left end as 0.   The dental root canal length measuring instrument according to claim 1, wherein the magnifying lens is integrally or detachably provided on the root canal length measuring instrument.   The dental root canal length measuring instrument according to claim 2, wherein the magnifying lens is detachably mounted on a separate support member.

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