JPH0417132Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an instrument for cutting gutta percha points in endodontic therapy.

BACKGROUND TECHNOLOGY As the final treatment of endodontic therapy, the current common treatment method is to enlarge the root canal after extracting the pulp, and then fill the gutta-percha point. This treatment method involves enlarging the root canal by 1 to 2 mm from the apical foramen.
Forms an apical sheet in a short position. At this time, insert the main point of the gutta-percha point, which is the second largest than the reamer or file used for the final enlargement, and insert an accessory point called the gutta-percha point into the resulting cavity of the root canal. Then, use a lateral pressure filling device called a spretzter to press the gutta percha point laterally, and insert the accessory point into the created space. This process is repeated several times to tightly close the root canal and complete the process. This surgical procedure is called lateral pressure root canal filling method. In this surgical procedure, it is ultimately necessary to cut off the head of the guttapercha point that protrudes from the tooth cavity. Conventionally, excess gutta percha points have been cut and removed by heating a plate-shaped device with a small tip called an excha with flame. Also, recently, a method of cutting and removing using a small soldering iron-like tool is sometimes used.

However, this method of cutting off and removing the excess part of the head of the Gatsuta percha point
The heated part of the cutting instrument often comes into contact with the patient's lips, causing burns to the patient, often causing trouble between the patient and the operator.

Problems to be Solved by the Invention The invention aims to improve the above-mentioned cutting instruments that may cause burns to patients and provide an instrument that can be used safely.

Means for Solving the Problems The present invention will be described with reference to drawings showing embodiments.

FIG. 1 is a longitudinal sectional view of the present invention, in which a battery 2, a switch 3 and a light emitting diode 4 are installed in a handle 1. The battery 2 can be put in and taken out by removing the cap 10. Switch 3, light emitting diode 4
A door (not shown) that can be opened and closed is provided on the side of the handle 1 for the portion including the terminal 5 and the terminal 5 for repair. It is also possible to provide a door that can open and close the entire side surface of the handle 1. The battery 2, switch 3, and light emitting diode 4 can be electrically connected, and are connected to a nichrome wire 6 at a terminal 5. The nichrome wire passes through a ceramic capillary tube 7 in a cover 8 protruding from the handle 1 to form a nichrome wire tip 9 on the outside. The nichrome wire tip 9 is inclined to one side so that it can be easily inserted into the tooth cavity. In order to operate while checking the light emission of the light emitting diode, it is convenient to have the tip part 9 of the nichrome wire tilted in the opposite direction to the light emitting position of the light emitting diode, in order to cut and remove the loose percha points of teeth in the lower jaw. ,
Tilting in the same direction is convenient for treating teeth in the upper jaw. For this purpose, the cover 8 is made to be able to rotate together with the nichrome wire tip 9 through an angle of 180° in the aforementioned direction. Figure 2 is A- in Figure 1.
It is a schematic cross-sectional view taken along line A'. A protrusion 20 is provided near the handle tip 11 in the direction of the light emitting position of the light emitting diode 4 and in the opposite direction around the cover 8, and a stopper piece 21 is provided on the surface of the handle tip.
is rotated at an angle of 180° between the protrusions. The cover 8 inserted into the tip of the handle 1 has a protrusion 2
0 and the terminal 5 screwed into the cover 8. Further, a cover having a tip of a nichrome wire inclined in a direction for easy operation can be formed integrally with the handle. Furthermore, the light emitting diode can be replaced with other identification signals, or these identification signals can be omitted.

The softening temperature of Gatsuta Percha Point is approximately 70° ~
Since the temperature is 90°C, the nichrome wire can be heated to about 80° to 120°C. The operation method is to confirm the light emission from the light emitting diode and to easily insert the tip of the nichrome wire into the tooth cavity.Turn the cover, insert the tip of the nichrome wire into the cavity, close the switch, heat the nichrome wire, and remove the nichrome wire. Melt away the excess part of the head of the point.

Therefore, the patient's lips can be safely treated without worrying about the heated portion of the device coming into contact with the patient's lips and causing burns.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the present invention, and FIG. 2 is a sectional view taken along line A-A' in FIG. 1... Handle, 2... Battery, 3... Switch, 4... Light emitting diode, 5... Terminal,
6... Nichrome wire, 7... Ceramic tube, 8
... Cover, 9 ... Nichrome wire tip, 10 ...
Cap, 11...handle tip, 20...protrusion, 21...stop piece.

Claims (1)

[Scope of utility model registration request] The nichrome wire is connected to a nichrome wire 6 through a battery 2, a switch 3 and a light emitting diode 4 in the handle 1, and the nichrome wire is exposed at an angle to the outside of the capillary through a ceramic capillary tube 7 in a cover 8 protruding from the handle. Furthermore, protrusions 20 are provided around the cover 8 in the same direction and in the opposite direction as the light emitting position of the light emitting diode 4, close to the handle tip 11, and a stopper piece 21 is provided on the surface of the handle tip, so that the cover can be attached to the protrusion. Extractor for cutting Gatsuta percha points that enables constrained rotation at an angle of 180°.