JPH07163597A - Root canal treating device - Google Patents

Abstract

PURPOSE:To start driving of a root canal tool in common use for detection of an apical contraction position after electrically detecting the arrival of the front end of this root canal tool at an apical contraction position and to increase the number of revolutions or vibrations of the root canal tool as time passes by or as the tool parts from the apical contraction position or according to measured values. CONSTITUTION:This root canal treating device has the root canal tool 45 in common use for detection of the apical contraction position consisting of a conductive material and an apical contraction position detector 60 for electrically detecting the arrival of the front end of this root canal tool 45 in common use for detection of the apical contraction position at the apical contraction position. The device drives a driving power source 7 or puts this power source into a driving state when the apical contraction position is detected. A controller 8 changes the output of the driving power source 7 as time passes by or according to the output of the apical contraction position detector 60 to increase the output as the root canal working tool 45 parts from the apical contraction position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a root canal treating apparatus suitable for use in dental treatment such as enlarging a root canal.

[0002]

2. Description of the Related Art The difficulty of endodontic root canal treatment is
The point is to securely expand and clean the root canal up to the apical stenosis position without damaging the tissue around the apex and tightly fill it.
It is not preferable to stimulate the periapical tissue with a reamer, a file, a broach, a root canal filling material, etc., beyond the apical stenosis position during the treatment. Insufficient insertion or leaving an uncleaned space in the apical root canal can lead to poor prognosis. Therefore, in order to perform the root canal treatment correctly, it is necessary to know the exact length of the root canal in advance.

As a method for clinically knowing the root canal length, there has been known a method in which a measuring needle (usually a reamer or a file) is inserted into the root canal and the position of the apex of the apex is known by the sense of the operator's fingers. There is. However, according to this method, in cases in which the root apex is completed with a simple and thick root canal such as the upper incisor, canine, lower bicuspid, etc. Although it can be known, there is a problem that it is difficult for even a skilled person to confirm with thin, uncompleted root apical teeth and curved root canals. Therefore, as electrically measuring the root canal length, as described in Japanese Patent Publication No. Sho 62-2187, a reamer or a file is inserted into the root canal as a measuring needle and brought into contact with the oral mucosa. between the strip electrodes, for example, the two AC voltage of a frequency of 1 KHz ₂ and 5 KHz ₂ addition, to detect a root canal length have been proposed.

FIG. 2 is a view for explaining an example of electrically measuring the root canal length using a manual reamer or file. In the figure, 10 is a reamer or file holder, 20 is a reamer or file, As is well known, 30 is a tooth, 31 is a root canal, and 32 is a gingiva. As is well known, the reamer or file 20 has a rubber stopper 21, a grip 22, and the like. In the case of measuring, the electrode portion 11 of the holder 10 holds the space between the rubber stopper 21 and the grip portion 22, and this electrode portion 11 is used as one of the electric signal extracting portions when measuring the electric root canal length, and the lip 32 side The electrode 12 of 1 is hooked on the lip or the like to be the other electrode. When the root canal length is obtained by this electrical measurement of the root canal length, the rubber stopper 21 is moved according to the root canal length.

In the above-mentioned conventional root canal treatment, the root canal length is measured and the root canal is enlarged using a manual reamer or file. Even if the root canal is moved to the reamer by moving it, there is no problem in workability. However, when driving the above-mentioned reamer or file using power such as an ultrasonic oscillator or a micro engine, the root canal length must be measured with the reamer or file attached to these heads.
It is very inconvenient and inefficient to move the position of the stopper during measurement.

Therefore, the present applicant has previously proposed a method of extracting an electric signal when a reamer or a file mounted on the head portion of an ultrasonic transducer, a micro engine, or the like is used as a root canal length measuring needle. . FIG. 3 is a view showing an example of use of a root canal length measuring electrode previously proposed by the applicant of the present invention. In the figure, 41 is an ultrasonic transducer, a handpiece part such as a micro engine (FIG. (Drawing assuming an engine), 42 is a grip part, 43 is a head part, 44 is a head case part, 45 is a cutting tool and root canal length measuring needle such as a reamer or a file, as is well known, The reamer or file is attached to the head portion 43, and the ultrasonic transducer or the micro engine is driven to expand and clean the root canal. Before that, as described above, the length of the root canal is accurately measured. Need to measure. One of the measuring methods is an electric measuring method as described above. However, as shown in FIG. 4, when the reamer or file 45 attached to the head portion 43 of the handpiece is used, The head portion 43, the head case portion 44, the grip portion 42, and the like interfere with the work of attaching the measuring electrode to the reamer or the file, and the workability is very poor.

Therefore, the present applicant has previously proposed a root canal treating device in which the electrode 50 can be detachably attached to the head case portion 44, as shown in FIG. The electrode 50 includes an insulating annular member 51 and the annular member 51.
When the hollow portion of the annular member 51 is inserted into the head case portion 44 and rotated, the electrode 5 integrally attached to the annular member 51 is attached.
The second electrode needle portion 52 a (that is, the electrode needle portion 52 a extending from the annular member 51 below the head portion 43) contacts the reamer or the file 45. The other end portion 52b of the electrode 52 is exposed outside the annular member 51, and the lead wire 55 is connected to the exposed end portion 52b. The end (not shown) of the lead wire 55 is naturally guided to a root canal length measuring device (not shown), and when the tip of the reamer or file 45 reaches the apical stenosis position, the tip of the reamer or file is located at the apex position. Notify you that you have reached.

[0008]

FIG. 4 is a diagram for explaining an example of performing a root canal treatment using the above-described ultrasonic transducer, micro engine, etc., and is detected as described above. The apical stenosis position thus obtained is guided to the root canal length detector 60 through the lead wire 55 and displayed on the display section of the detector. FIG. 4 (a) is a diagram showing the relationship between the insertion depth of the reamer or file 45 and the output voltage, and FIG. 4 (b) is a diagram showing the display section of the detector. When the tip of the reamer reaches the apical stenosis position, the current flowing through the reamer or file becomes a predetermined constant value,
It can be seen that the indicator needle 61 of the detector indicates the APEX position, and the tip of the reamer or file has reached the apical stenosis position. Therefore, the operator stops driving the ultrasonic transducer or the micro engine, returns the reamer or file from the apical stenosis position, drives the reamer or file again, and continues the operation. However, in this case, since the reamer or file is stopped after the tip of the reamer or file reaches the apex stenosis position, there is a risk that the tip of the reamer or file may cross the apex stenosis position.

The present invention has been made in view of the above circumstances, and in the case of expanding a root canal using a micro engine or an ultrasonic transducer, the tip of the reamer or file has apical constriction. The object of the present invention is to provide a root canal treatment device which is excellent in safety and easy to use because it is prevented from being driven over a position.

[0010]

In order to solve the above problems, the present invention provides (1) an apical stenosis position detecting and root canal tool made of a conductive material, and the apical stenosis position detecting and root canal. Apical stenosis position detection means for electrically detecting that the tip of the tool has reached the apical stenosis position, and when the apical stenosis position is detected, start or drive the apical stenosis position detection and root canal tool And (2) the driving means is an ultrasonic wave generator, and the amplitude output of the ultrasonic wave generator increases with the passage of time.
(3) The driving means is an ultrasonic wave generator, and the amplitude output of the ultrasonic wave generator increases as the apex detection / root canal tool moves away from the apical stenosis position.
(4) The driving means is an ultrasonic wave generator, and an amplitude output of the ultrasonic wave generator changes according to an output signal of the apex stenosis position detecting means, and (5) the driving means is A micro engine, and the rotation speed of the micro engine increases with the passage of time; That the tool becomes faster as it moves away from the apical stenosis,
(7) The driving means is a micro engine, and the number of revolutions of the micro engine changes according to an output signal of the apical stenosis position detecting means.

[0011]

[Function] The apical stenosis position is also detected, and after electrically detecting that the tip of the root canal tool has reached the apical stenosis position, the drive of the root canal stenosis tool is started, and with the passage of time or the apex. The rotational speed of the micro engine or the vibration of the ultrasonic generator is increased as the distance from the narrowed position increases or the measured value is increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a constitutional view for explaining an embodiment in which the present invention is applied to a root canal treating apparatus using an ultrasonic transducer, and is shown in FIGS. The same reference numerals as those in FIGS. 2 and 3 are attached to the portions having the same functions as those of the above example. As described above, the root canal length detector 60 detects the current flowing between the electrodes 55 and 12 to detect the apical stenosis position, and the current value of the detector 60 is as described above. When the voltage corresponding to the apical stenosis position or the set position is reached and the detection voltage reaches a predetermined voltage, for example, the transistor 1
Is turned on, the light emitting diode emits light, and the photocoupler 2
When the output exceeds a certain threshold value, the monomulti 3 is operated. When the mono-multi 3 operates, the flip-flop 5 operates, and the drive power source 7 of the drive unit 6 of the ultrasonic transducer is turned on or in an on-enabled state. Therefore, here, the reamer or the file is driven, or is driven by pressing a drive button (not shown).

Therefore, according to the present invention, since the reamer or the file is driven with the tip of the reamer or the file in the apical stenosis position, after that, the root canal is enlarged while retracting from the apical stenosis position. If this is done, the reamer and the tip of the file will not be driven beyond the apical stenosis position,
The root canal processing (expansion) work can be performed with confidence.

However, the root canal at the apical stenosis position is very thin, and it is dangerous to suddenly apply a large rotation or vibration to the reamer or file with the tip of the reamer or file at the apical stenosis position. Therefore, if a low-speed rotation or a slight vibration is given at the beginning and the rotation speed or the vibration is increased as it retreats from the apical stenosis position, safe and effective work can be performed.

In FIG. 1, reference numeral 8 is a controller for controlling the amplitude of the driving power supply 7, and the controller 8 operates as described above when the flip-flop 5 is turned on, or
Starts operation when the switch for the drive power supply 7 is turned on, and controls so as to increase the output voltage of the drive power supply 7 with the passage of time or with the tip of the reamer or file retracting from the apical constriction position. To do. When controlling according to the elapsed time, a timer may be built in the controller 8 and controlled by the timer. When controlling according to withdrawal from the apical stenosis position, the root canal can be controlled. The control may be performed according to the output signal of the length detector 60. The mono-multi 4 operates when the output signal of the root canal length detector 60 becomes a predetermined value or less, preferably when the reamer or the file comes out of the root canal, and resets the flip-flop 5. Further, in the case of the present invention, the root canal length detector does not necessarily require a pointer, so that the root canal length detector, the photocoupler, the multivibrator, the controller and the like can be integrated into the holder.

[0016]

As is apparent from the above description, according to the present invention, in a root canal treatment device using a micro engine or an ultrasonic transducer, the reamer and the tip of the file are located at the apical stenosis position. Since the operation is started as a base point, these reamers and files do not exceed the apical stenosis position, and when the stenosis is near the apical stenosis position, the rotation speed or vibration is small, and the larger the rotation, the larger the rotation. Since the number or the number of vibrations is set, it is possible to provide a safe and extremely easy-to-use root canal treatment device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part for explaining an embodiment when the present invention is applied to a root canal treatment device using an ultrasonic transducer.

FIG. 2 is a diagram for explaining an example of a conventional method for measuring a root canal length for a hand.

FIG. 3 is a diagram for explaining an example of a root canal length measuring method previously proposed by the present applicant.

FIG. 4 is a diagram for explaining an example of a case where a root canal operation is performed using the root canal length measuring device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reamer or file tip detection transistor, 2 ... Photocoupler, 3, 4 ... Monomulti, 5 ... Flip-flop, 6 ... Reamer or file drive part, 7 ... Drive power supply, 8 ... Controller, 30 ... Teeth, 31 ... Root canal, 41
... Handpiece, 45 ... Reamer or file, 60 ... Root canal length measuring instrument.

Claims (7)

[Claims] 1. A root apex stenosis position detecting and root canal tool made of a conductive material, and a root electrically detecting that the tip of the root apical stenosis position detecting and root canal tool reaches the apex stenosis position. A root canal treatment device comprising: an apical stenosis position detecting means; and a driving means for detecting the apical stenosis position and driving the root canal tool when the apical stenosis position is detected. 2. The root canal treatment device according to claim 1, wherein the driving means is an ultrasonic wave generator, and the amplitude output of the ultrasonic wave generator increases with the passage of time. 3. The driving means is an ultrasonic generator, and the amplitude output of the ultrasonic generator increases as the apex detection / root canal tool moves away from the apical stenosis position. 1. The root canal treatment device according to 1. 4. The drive unit is an ultrasonic wave generator, and the amplitude output of the ultrasonic wave generator changes according to the output signal of the apex stenosis position detection unit. Root canal treatment device. 5. The root canal treatment device according to claim 1, wherein the drive means is a micro engine, and the rotation speed of the micro engine increases with the passage of time. 6. The driving means is a micro engine, and the rotation speed of the micro engine increases as the root apex stenosis position detection / root canal tool moves away from the apex stenosis position. The described root canal treatment device. 7. The root canal treatment according to claim 1, wherein the drive means is a micro engine, and the rotation speed of the micro engine changes according to an output signal of the apex stenosis position detection means. apparatus.