JP2008068015A - Dental root canal length measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental root canal length measuring apparatus which is provided with a ruler integrally with the root canal length measuring apparatus, facilitates the management of the ruler, makes measurement with one hand possible, ensures secure measurement, and is excellent in handleability for both right-handed operator and left-handed operator further. <P>SOLUTION: On the surface of the case body of the root canal length measuring apparatus 10, a dimension scale 12R and/or 12L extending in a horizontal direction is provided. The dimension scale comprises a scale 12R for a right-handed operator extending to the left with the right end as 0 and a scale 12L 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 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 prior to root canal treatment. The present invention relates to a dental root canal length measuring instrument that integrally has a scale for measuring the position of the stopper, that is, the length (root canal length) from the tip of the root canal length measuring needle to the stopper.

  In root canal treatment, prior to root canal treatment, a root canal length measuring needle (file) is inserted into the root canal, and it is detected that the tip has reached the position of the apical canal. The position of the stopper inserted through the tube length measuring needle 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 using a ruler or the like, from the tip of the root canal length measuring needle to the stopper The length of root canal (root canal length) is measured to obtain the root canal length.

FIG. 5 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 needle 1 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 an alarm or the like sounds when the tip of the root canal length measuring needle 1 reaches the apical position. (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 details thereof are omitted).
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, Management was troublesome.

  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 circumstances, and the above-mentioned ruler is provided integrally with the root canal length measuring instrument, making it easier and more reliable to manage the ruler and allowing measurement with one hand. The purpose of the present invention is to provide a dental root canal length measuring instrument that can be used more reliably for right-handed and left-handed operators.

  The invention of claim 1 has a dimensional scale extending in the horizontal direction on the surface of the measuring instrument housing, and the dimensional scale extends rightward with the right end as 0 and the left end as 0. It is characterized by comprising a scale.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the dimension scale is scaled on a scale plate which is detachable from the measuring instrument housing.

  The invention according to claim 3 is the invention according to claim 2, wherein the scale plate includes a scale plate having a scale extending leftward with a right end being 0, and a scale plate having a scale extending rightward with the left end being 0. It is characterized by comprising.

  The invention of claim 4 is the invention of claim 2, wherein the scale plate is composed of a single scale plate having a scale extending leftward with the left end set to 0 and a scale extending rightward with the left end set to 0. It is characterized by that.

  According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the scale plate has a cross-sectional shape perpendicular to the axial direction, and a central portion protrudes in an arc shape.

  According to a sixth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the scale plate has at least one end, in a direction perpendicular to the axial direction, between the two convex portions and the two convex portions. It has a recessed portion provided, and the root canal length measuring needle can be inserted into the recessed portion along the axial direction of the scale plate.

  The invention of claim 7 is the invention according to any one of claims 1 to 6, wherein the scale is a position of a stopper on the root canal length measuring needle after the root canal length measurement, that is, the tip of the root canal length measuring needle. It measures the length from the said stopper to the said stopper, It is characterized by the above-mentioned.

  The present invention has been made in view of the above circumstances, and the above-mentioned ruler is integrally provided in the root canal length measuring instrument, making the ruler more easily and reliable, and measuring with one hand. The purpose of the present invention is to provide a dental root canal length measuring instrument that is easy to use for right-handed and left-handed operators.

  FIG. 1 is an external view for explaining an embodiment of a root canal length measuring device according to the present invention. In the figure, the same function as that of the prior art shown in FIG. The same reference numerals are assigned, 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 performed in the same manner as the prior art shown in FIG. Is called. In the case of the illustrated example, the measuring instrument 10 has a winding mechanism for winding the lead wires 8 and 9, so that the lead wire having a length suitable for the operator can be obtained.

  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, 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, a stopper hits the ruler. There was a fear of being moved.

  The present invention has been made to solve the problems of the prior art as described above. For example, as shown in FIG. 1, a scale plate is detachably integrated with the surface of the casing of the root canal length measuring instrument 10. Provided. In FIG. 1, as a scale plate, a scale plate 12R for a right-handed operator is placed on a scale plate mounting substrate 13R provided on the right side of the housing surface, and a scale plate 12L for a left-handed surgeon is placed on the left side of the housing surface. An example of mounting in the horizontal direction on the provided scale plate mounting substrate 13L is shown. As shown in the figure, the scale plate 12R for the right-handed operator is scaled with the right end set to 0 (scale) and extending to the left. During the measurement, the operator places the measuring needle 1 on the right hand. By holding the stopper 4 from the right side against the right end (0 scale) of the scale plate and reading the tip of the measuring needle 1 with the scale plate 12R, the root canal length can be known. However, since this is difficult to use for left-handed surgeons, a scale plate 12L is provided as a scale for left-handed surgeons with the left end set to 0 (scale) and extending rightward.

  FIG. 2 is a diagram for explaining another scale plate suitable for use in the practice of the present invention. In this example, a scale plate for a right-handed operator and a scale plate for a left-handed surgeon are used. The scale plate 12 is composed of a single scale plate 12, and as shown in the figure, the scale plate 12 is a scale for a right-handed operator, a scale extending leftward with the right end being 0 (scale), and a left-handed operator As the scale for use, a scale extending rightward with the left end as 0 (scale) is graduated.

When the scale plate 12 shown in FIG. 2 is used, the right-handed operator attaches the scale plate 12 to the right side of the surface of the measuring instrument housing or slides the scale plate 12 to the right to attach the mounting board 13 _2. 13 ₃ , and using the scale on the right side of the scale plate 12, the left-handed operator attaches the scale plate 12 to the left side of the surface of the measuring instrument housing or places the scale plate 12 on the left Then, it is supported by the mounting substrates 13 ₁ and 13 ₂ and measured using the scale on the left side of the scale plate 12.

  3 is an enlarged cross-sectional view taken along line III-III in FIG. 2. As shown in the figure, the scale plate 12 (and 12R, 12L) has a cross-sectional shape perpendicular to the axial direction, with the central portion 12 'protruding in an arc shape. When the stopper 4 is applied to the end portion, the lower portion of the stopper 4 does not hit the surface of the measuring instrument casing or the end face of the scale plate mounting substrate 13, but hits the arcuate central portion 12 'and the scale. There is no possibility that the position of the stopper is shifted by hitting another object such as the surface of the measuring instrument housing or the end face of the scale plate mounting board before hitting the plate.

FIG. 4 is a view for explaining another embodiment of the scale plate according to the present invention. FIG. 4 (A) is a view seen from the direction of the IV-IV line of FIG. 2, and FIG. FIG. 4A is a perspective view.
This embodiment, two protrusions 14 _1, 14 ₂ provided (the direction perpendicular to the axial direction of the scale plate 14) axially on the end portion of the scale board 14, these protrusions 14 ₁ and 14 ₂ A recess 14 ₀ into which the measuring needle 1 is inserted is provided, and as shown in FIG. 4B, the measuring needle 1 is inserted into the recess 14 ₀ , and the stopper 4 of the measuring needle 1 is connected to the convex 14 ₁ , 14 ₂ . In this way, like the scale plate 12 shown in FIG. 2, the stopper 4 of the measuring needle 1 can be easily and stably brought into contact with the end of the scale plate, and the measuring needle 1 can be moved in the axial direction of the scale plate 14. The root canal length can be measured more easily and accurately.
FIG. 4 shows an example in which the concave and convex portions (14 ₁ , 14 ₂ , 14 ₀ ) are provided at both ends of the scale plate. However, as shown in FIG. It can be easily understood that it may be for the surgeon or may be provided at the left end for the left-handed surgeon.

  The scale plate may be preliminarily fixed to the surface of the measuring instrument housing, but the measuring needle 1 is used in the patient's oral cavity, and the scale plate is used after being used in the oral cavity. The scale plate must be kept hygienic because it is used in contact with the surface. Therefore, the scale plate is preferably made of a material that can be attached to and detached from the measuring instrument housing and that can be sterilized such as an autoclave.

It is an external view for demonstrating one Example of the root canal length measuring device by this invention. It is a figure for demonstrating other scale plates used suitably for implementation of this invention. It is a figure for demonstrating the other scale plate suitable for using for implementation of this invention, and is the III-III line expanded sectional view of FIG. It is a figure for demonstrating the other scale plate suitable to be used for implementation of this invention, and is the IV-IV line side view of FIG. 2, and a perspective view. 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 position detection display part, 12, 12R, 12L ... Scale plate, 13, 13R, 13L ... Scale plate attachment plate, 14 ... Scale plate.

Claims (7)

  The measuring instrument has a dimension scale extending in the horizontal direction on the surface of the measuring instrument. The dimension scale is composed of a scale extending rightward with the right end as 0 and a scale extending rightward with the left end as 0. Dental root canal length measuring instrument.   2. The dental root canal length measuring instrument according to claim 1, wherein the dimension scale is scaled on a scale plate that is detachable from the measuring instrument housing.   3. The dental plate according to claim 2, wherein the scale plate includes a scale plate having a scale extending leftward with a right end being 0, and a scale plate having a scale extending rightward with the left end being 0. Root canal length measuring instrument.   The dental scale according to claim 2, wherein the scale plate is composed of a single scale plate having a scale extending leftward with a left end as 0 and a scale extending rightward with the left end as 0. Tube length measuring instrument.   The dental root canal length measuring instrument according to any one of claims 2 to 4, wherein the scale plate has an arcuate central portion protruding in a cross-sectional shape perpendicular to the axial direction.   The scale plate has at least one end, two convex portions in a direction perpendicular to the axial direction, and a concave portion provided between the two convex portions, and the root canal length measuring needle is placed in the concave portion. The dental root canal length measuring instrument according to any one of claims 2 to 4, wherein the dental root canal length measuring instrument can be inserted along the axial direction of the scale plate.   The scale measures the position of the stopper on the root canal length measuring needle after root canal length measurement, that is, the length from the tip of the root canal length measuring needle to the stopper. The dental root canal length measuring instrument according to any one of Items 1 to 6.

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