JP5622540B2 - Vibration cutting tool for root canal treatment and vibration cutting device for root canal treatment - Google Patents

Description

  The present invention relates to a vibration cutting tool for root canal treatment and a vibration cutting device for root canal treatment, and more particularly, in dental practice, a root canal inner wall is cut or a filling material such as a gutta percha filled in the root canal. The present invention relates to a vibration cutting tool for root canal treatment for cutting and removing and a vibration cutting apparatus for root canal treatment using the same.

  In dental practice, root canal treatment with a root canal treatment vibration cutting tool (scaler tip) to cut the root canal inner wall of the tooth or to remove the filling material such as gutta-percha filled in the root canal A vibration cutting device is used. As such a vibration cutting device for root canal treatment, a handpiece type gripping part, a vibration generating part by air drive or electric drive of an ultrasonic vibrator built in the gripping part, and a tip of the gripping part are provided. And a vibration cutting tool for root canal treatment that is detachably attached to the tool attaching / detaching portion (see, for example, Patent Document 1). The vibration generated by the vibration generating unit is transmitted to the working end coupled to the tip of the shaft through the tool attaching / detaching unit and the shaft of the vibration cutting tool for root canal treatment. The inner wall of the tube is cut and the filler is cut off. Patent Document 2 discloses a substance removing device for attaching a working head to the tip of a vibrating shaft, forming a hole in a tooth to remove a defective portion of a tooth, or removing an insert (filling). ing. Patent Document 3 discloses a reverse root canal enlargement tool that opens a hole in the root canal from the side closer to the apex of the root canal. Furthermore, Patent Document 4 discloses an apparatus in which a tool as a cleaning element is detachably attached to the tip of a vibrating head and the tooth surface or periodontal is cleaned by the vibration of the cleaning element.

JP 2005-348770 A Japanese Patent No. 3388545 Japanese Patent Laid-Open No. 5-21917 JP 2000-139966 A

  When the root canal cutting device as described above is used to expand the fracture line of the root canal inner wall or to remove and remove the filler in the root canal, in the clinical field, not only the cutting efficiency of the object to be cut but also the cut object It is important to be able to quickly remove the root canal from the root canal. Patent Document 1 discloses a tool for cutting a root canal in which a fine diamond powder is attached to the tip side of a needle-shaped shaft portion. In terms of suitability for removal, it could not be said that it could fully meet the needs of many surgeons.

  In addition, the substance removal instrument disclosed in Patent Document 2 is not intended for root canal cutting, and therefore, even if the technical idea disclosed in Patent Document 2 is applied to a root canal cutting apparatus, it meets the above needs. There is no probability that what you get will be realized. Furthermore, Patent Document 4 discloses a device for cleaning the tooth surface or periodontal, but it is clearly distinguished from that for root canal cutting. Therefore, in this case, the device is also applied to the root canal cutting device. However, there is no probability that what can meet the above needs will be realized. The root canal enlargement tool of Patent Document 3 is common to the technical field targeted by the present application in terms of root canal cutting, but is inserted from the root side to expand the root canal, and the root canal filling is cut. It is not intended to remove or expand the root canal fracture line, and is positioned as a unique root canal cutting technique.

  The present invention has been made in view of the above, and a vibration cutting tool for root canal treatment and a vibration for root canal treatment that can suitably perform cutting removal of a root canal filling and cutting expansion of a broken line of the root canal. It aims at providing a cutting device.

The vibration cutting tool for root canal treatment according to the first invention is a vibration cutting tool for root canal treatment including a shaft portion and a working end portion coupled to a tip of the shaft portion. It consists of a conical body tapered toward the tip, and is coupled to the shaft portion at substantially the center of the bottom surface of the conical body, and the angle formed between the shaft center of the shaft portion and the bottom surface of the conical body is The working end portion including the bottom surface is set to a size that can be inserted into a root canal from a root canal opening of a tooth .
As the cone, a cone or a pyramid is preferably employed.

  According to a second aspect of the present invention, there is provided a vibration cutting device for treating a root canal, wherein a handpiece having a vibrator incorporated in a gripping portion and a handpiece that is detachably attached to a distal end portion of the handpiece so that vibration caused by the vibrator is propagated. Any root canal treatment vibration cutting tool, a medium supply tube that is connected to a base of the handpiece and supplies a driving force to the vibrator, and a control unit that controls the driving force And a drive operation unit for operating the control unit.

According to the first and second inventions, the surgeon attaches the vibration cutting tool for root canal treatment to the distal end portion of the handpiece, grips the gripping portion of the handpiece, and moves the working end portion of the cutting tool. When it is inserted into the root canal and the drive operation unit is operated, vibrations can be generated from the vibrator by a predetermined driving force controlled by the control unit. The vibration by the vibrator is made by the power energy of the power medium supplied through the power medium supply path built in the medium supply tube. Vibration from the vibrator is via a shaft portion of the vibration cutting tool is propagated to the working end, the working end can be performed root canal treatment by acting on the root canal. Since the working end consists of a conical body tapered toward the tip, when inserted into the root canal accompanied by vibration, the cutting of the inner wall of the root canal and the removal of the filler in the root canal are effectively performed. The Since the angle formed between the shaft center of the shaft portion and the bottom surface of the cone is a right angle or an acute angle, cutting of the inner wall of the root canal and the filler is more effective due to the vibration of the bottom peripheral portion of the cone. To be made. In particular, the surgeon operates the treatment end to move up and down in the root canal during the treatment operation, and at this time, the oscillating bottom peripheral edge acts so as to be caught by a foreign object in the root canal or a cutting object. Techniques such as cutting and removal of root canal fillings and cutting and enlargement of broken lines are extremely efficient.
Incidentally, when the angle is larger than a right angle (90 °), the degree of catching is small, and the cutting function and the removing function do not sufficiently meet the needs of the surgeon. Confirmed by clinical validation.

1 is a schematic overall perspective view showing an embodiment of a vibration cutting device for root canal treatment according to the present invention. It is the partial fracture | rupture partial top view and one part enlarged view of one Embodiment of the vibration cutting tool for root canal treatment with which the vibration cutting apparatus for root canal treatment is mounted | worn. It is a conceptual diagram which shows the use condition of the vibration cutting tool for the root canal treatment. It is the same figure as FIG. 2 which shows the modification of the vibration cutting tool for the root canal treatment. It is the same figure as FIG. 2 which shows another modification of the vibration cutting tool for root canal treatment. (A) is the same figure as FIG. 2 which shows another modification of the vibration cutting tool for root canal treatment, (b) is the figure seen from the arrow sight line X of (a). It is the same figure as FIG. 2 which shows another modification of the vibration cutting tool for root canal treatment. It is a figure similar to FIG. 2 which shows the vibration cutting tool for root canal treatment of other embodiment of this invention. (A) is a top view of the handpiece provided with the vibration cutting tool for root canal treatment of still another embodiment of the present invention, and (b) is an exploded view of a mounting portion of the vibration cutting tool for root canal treatment. . (A) is a top view of the handpiece provided with the vibration cutting tool for root canal treatment of still another embodiment of the present invention, and (b) is an exploded view of a mounting portion of the vibration cutting tool for root canal treatment. .

  Hereinafter, embodiments of a vibration cutting tool for treating a root canal according to the present invention and a vibration cutting device for treating a root canal using the same will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an overall configuration of a vibration cutting device for treating a root canal according to an embodiment of the present invention. A root canal treatment vibration cutting apparatus 1 shown in FIG. 1 is detachably attached to a handpiece 2 having a vibrator 3 built in a gripping portion 2a and a distal end portion 2b of the handpiece 2, and is vibrated by the vibrator 3. A medium supply that includes a vibration cutting tool for root canal treatment (hereinafter referred to as a scaler tip) 11 through which power is propagated and a power medium supply path that is connected to the base 2c of the handpiece and supplies a driving force to the vibrator 3. Tube 4, a control unit 5 that controls the driving force, and a drive operation unit 6 that operates the control unit 5. The control unit 5 is built in the main body control box 50, and the display unit 7 and the setting operation unit 8 are provided on the main body control box 50. As the vibrator 3, an ultrasonic vibrator or an air-driven vibrator is used. In the former case, the medium supply tube 4 has a power line as a power medium supply path, and in the latter case, a power medium supply. Each of the compressed air supply pipes is provided as a road.

  The setting operation unit 8 includes an output level selection setting switch 81 for vibration by the vibrator 3, a water injection selection switch 82 for selecting whether or not to perform water injection described later at the time of treatment, or an auto stop setting switch 83. It is provided as a touch panel. The auto-stop setting switch 83 uses the scaler tip 11 as one measurement electrode and the oral electrode (not shown) as the other measurement electrode when performing vibration cutting treatment while applying a root canal length measurement signal. Is a switch for setting the function of detecting that the reference position has been reached and automatically stopping the driving of the scaler chip 11, and selecting whether or not to activate the switch 83a for determining the reference position and the auto-stop function. It consists of a selection switch 83b. The display unit 7 displays each operation condition selected and set by the setting operation unit 8. The drive operation unit 6 is a foot controller, and based on each operation condition selected and set by the setting operation unit 8 by an operator's stepping operation, operation instructions for various functions of the handpiece 2 including driving of the vibrator 3 Is made. On the side of the main body control box 50, a power switch 9 and a handpiece holder 10 are provided. The handpiece 2 is held by the handpiece holder 10 when not in use.

  As shown in detail in FIG. 2, the scaler chip 11 includes a mounting base 12 for detachably mounting on the distal end portion 2 b of the handpiece 2, a shaft portion 13 coupled to the mounting base 12, It comprises a working end 14 coupled to the tip of the shaft 13. The mounting base 12, the shaft 13, and the working end 14 are integrally formed by cutting and bending a steel material. The mounting base 12 is provided with a male screw portion 12a on the tip portion 2b side portion of the handpiece 2, and can be screwed into a female screw portion (not shown) provided on the tip portion 2b of the handpiece 2. Yes. A milling cut portion 12b is formed on the shaft portion 13 side portion of the mounting base portion 12. A tool such as a wrench is applied to the milling cut portion 12b, and the male screw portion 12a is not screwed into or loosened from the female screw portion. Configured to get. Thereby, the scaler chip 11 can be freely attached to and detached from the distal end portion 2b of the handpiece 2. A water supply pipe 12c is provided in the central portion along the longitudinal direction of the mounting base 12, and the water supply pipe 12c is connected to a water inlet 12e that opens to the coupled base with respect to the mounting base 12 of the shaft portion 13. It communicates with the water pipe 12d. The water injection pipe 12d and the water injection port 12e are formed so that the discharged water faces the working end 14, and the affected part and the working end can be cooled and washed during treatment. Water is supplied to the water supply pipe 12c from a water supply pipe (not shown) built in the medium supply tube 4 via a water supply pipe (not shown) built in the handpiece 2.

  The shaft portion 13 extends continuously from the mounting base portion 12, is bent into a substantially U shape in the middle, and is formed in a columnar shape having a gradually decreasing diameter toward the distal end side. The working end portion 14 is composed of a straight conical body 15 that is tapered toward the tip, and is concentrically integrated with the tip of the shaft portion 13 at the center of the bottom surface 15 a of the right cone 15. At least the front side portions of the working end portion 14 and the shaft portion 13 have a size and an outer diameter that can be inserted into a root canal of a tooth (see FIG. 3). In the present embodiment, the angle α formed by the shaft center 13a of the shaft portion 13 and the bottom surface 15a of the right cone 15 is 90 °. In addition, the angle β formed between the bottom surface 15a and the bus 15b in the right cone 15 is an acute angle, and the circular peripheral edge portion 15c of the bottom surface 15a is formed in a knife edge shape. In the illustrated example, the apex angle of the right cone 15 is 50 ° and the angle β is 65 °.

  The point of root canal treatment by the vibration cutting apparatus 1 for root canal treatment having the scaler tip 11 having such a configuration will be described with reference to FIG. Prior to root canal treatment, the operator first turns on the power switch 9 shown in FIG. 1, and then sets various conditions in the setting operation unit 8. That is, the output level selection setting switch 81 sets the vibration output level. The △ switch is used to increase the output level, and the ▽ switch is used to decrease. The set output level is displayed on the display unit 7. In addition, the water injection selection switch 82 selects and sets whether or not water injection is performed simultaneously. This setting result is also displayed on the display unit 7. Further, in the auto stop setting switch 83, a reference position for automatically stopping the vibration of the scaler chip 11 is set by the switch 83a. The △ switch is used to raise the reference position, i.e., away from the apex position, and the ▽ switch is used to lower the reference position, i.e., closer to the apex position. When the automatic stop is performed at the set reference position, the selection switch 83b is turned on. The reference position is set by reading a root canal picture stored in advance in the control unit 5 on the display unit 7 and instructing the indicator to move with respect to this picture.

  After performing the condition setting as described above, the grasping portion 2a of the handpiece 2 is grasped, and the scaler tip 11 is inserted into the root canal T1 of the tooth T from the working end portion 14 at the tip thereof, as shown in FIG. . FIG. 3 shows a case where the thermoplastic filler g such as gutta-percha filled in the root canal T1 is removed by cutting. Then, the surgeon steps on the foot controller 6 to drive the vibrator 3 and applies the tip of the action end 14 to the filler g. The vibration by the vibrator 3 is propagated to the working end portion 14 via the shaft portion 13 (see the arrow in FIG. 3). The filler g in contact with the working end portion 14 has heat due to the vibration of the working end portion 14 and thereby melts out. Since the working end portion 14 is composed of a right cone 15, the working end portion 14 smoothly sunk into the layer of the filler g from the top portion thereof by vibration and melting of the filler g. In the process of subtraction with this vibration, the peripheral edge 15c having a knife edge shape acts so as to be caught by the surrounding filler g, so that the filler g is effectively cut. Then, by moving the scaler chip 11 up and down, the cut filler g floats in a small lump so that it can be unwound. After that, the vibration is stopped, and after waiting for the filling g to cool and harden, the scaler chip 11 is pulled out from the root canal T1, and the filling g that has hardened into a small lump is scraped off. Can be taken out. If the water injection state is set by the water injection selection switch 82 of the setting operation unit 8, when the action end 14 is vibrated, water is injected from the water injection port 12e toward the action end 14 and the action part is overheated. Is suppressed. Further, when the auto stop function is set in the auto stop setting switch 83, when the tip of the scaler chip 11 reaches the reference position, the vibration of the vibrator 3 is stopped and the water injection is also stopped. These operation controls are performed by the control unit 5.

  Such a function by the scaler tip 11 is similarly exhibited when performing cutting enlargement treatment of the broken line in the root canal. That is, the broken line formed on the inner wall of the root canal T1 can be cut and enlarged so as to be scratched at the peripheral edge portion 15c, thereby removing the lesioned part and preventing recontamination. Made.

  FIG. 4 shows a modification of the scaler chip 11 of the present embodiment. The scaler tip 11 of this example is different from the example shown in FIG. 2 in that the working end portion 14 is composed of a right cone 16 having a larger apex angle and bottom diameter compared to the example shown in FIG. However, at the central portion of the bottom surface 16a of the right cone 16 is concentrically integrated with the tip of the shaft portion 13, and at least the front side portion of the working end portion 14 and the shaft portion 13 is the root of the tooth. A size and an outer diameter that can be inserted into the tube (see FIG. 3), and an angle α formed by the axis 13a of the shaft portion 13 and the bottom surface 16a of the right cone 16 is 90 °. The structures of the mounting base 12 and the shaft 13 are the same as the example shown in FIG. Therefore, the angle β formed between the bottom surface 16a and the bus 16b in the right cone 16 is smaller than the example shown in FIG. 2, and the circular peripheral edge portion 16c of the bottom surface 16a is formed in a sharper knife edge shape. In the illustrated example, the vertical cone 16 has an apex angle of 112 ° and an angle β of 34 °.

  When the root canal treatment as shown in FIG. 3 is performed using the scaler tip 11 of this example, the resistance at the time of insertion into the root canal T1 is increased, but the peripheral cutting portion 16c is more likely to be caught and cut by the filler g. In addition, the work of scraping off the cut material and taking it out of the root canal T1 is made more effective. In particular, since the diameter of the bottom surface 16a is substantially larger than the bottom surface 15a in the example shown in FIG. 2, the cut out and removed filler g can be taken out of the root canal T1 more efficiently.

  FIG. 5 shows still another modification of the scaler chip 11 of the present embodiment. The scaler tip 11 of this example is different from the example shown in FIG. 4 in that the working end portion 14 is composed of a right cone 17 having a smaller bottom diameter compared to the example shown in FIG. This is almost the same as the example shown in FIG. In the illustrated example, the apex angle of the right cone 17 is 120 ° and the angle β is 30 °, and the circular peripheral edge portion 17c of the bottom surface 17a is formed in a sharper knife edge shape than the example of FIG. . When the root canal treatment as shown in FIG. 3 is performed using the scaler tip 11 of this example, the resistance at the time of insertion into the root canal T1 is smaller than that in the example shown in FIG. The catching machinability with respect to g is further improved.

  FIG. 6 shows still another modification of the scaler chip 11 of the present embodiment. In the scaler tip 11 of this example, the working end portion 14 is composed of a regular quadrangular pyramid 18 having a shape in which the top portion is cut. The regular quadrangular pyramid 18 is concentrically integrated with the tip of the shaft portion 13 at the center of the bottom surface 18a. At least the front side portions of the working end portion 14 and the shaft portion 13 have a size and an outer diameter that can be inserted into a root canal of a tooth (see FIG. 3). In the present embodiment, the angle α formed by the axis 13a of the shaft portion 13 and the bottom surface 18a of the regular quadrangular pyramid 18 is 90 °. In addition, the angle β formed between the bottom surface 18a and the bus bar 18b in the regular quadrangular pyramid 18 is an acute angle, and the peripheral edge portion 18c of the bottom surface 18a having a regular square shape is formed in a knife edge shape. In the illustrated example, the angle β is about 67 °. Since such a regular quadrangular pyramid 18 has four ridge portions 18d, when performing root canal treatment as shown in FIG. 3 using the scaler tip 11 of this example, the action of the ridge portion 18d due to vibration is reduced. In addition, the cutting removability of the filler g is further improved.

  FIG. 7 shows still another modification of the scaler chip 11 of the present embodiment. In the scaler tip 11 of this example, the working end portion 14 connects two straight cones 19 and 20 similar to the example shown in FIG. 2 concentrically and in series along the axis 13 a of the shaft portion 13. It consists of a two-stage cone 21 having a shape. However, the right cone 19 on the shaft 13 side has a right truncated cone shape and is integrally connected to the right cone 20 on the front side. The right conical body 19 is concentrically integrated with the tip of the shaft portion 13 at the center of the bottom surface 19a. At least the front side portion of the working end portion 14 and the shaft portion 13 formed of the two-stage cone 21 has a size and an outer diameter that can be inserted into a root canal of a tooth (see FIG. 3). In the scaler tip 11 of this example, the angle α1 formed between the shaft center 13a of the shaft portion 13 and the bottom surface 19a of the right cone 19 and the shaft center 13a of the shaft portion 13 and the bottom surface 20a of the right cone 20 are formed. The angles α2 are all 90 °. Further, the angle β1 formed between the bottom surface 19a and the generatrix 19b in the right cone 19 and the angle β2 formed between the bottom surface 20a and the generatrix 20b in the right cone 20 are both acute angles, and the circular peripheral edge portion 19c of the bottom surface 19a, and The circular peripheral edge portion 20c of the bottom surface 20a is formed in a knife edge shape. When the root canal treatment as shown in FIG. 3 is performed using the scaler tip 11 having the two-step knife-edge-shaped circular peripheral portions 19c and 20c as in this example, the two-step knife-edge-shaped circular peripheral portion is provided. By the synergistic action of 19c and 20c, the above-described filling g can be removed and removed from the root canal T1 more efficiently.

  FIG. 8 shows a scaler chip according to another embodiment of the present invention. Similar to the example shown in FIG. 1, the scaler chip 11 </ b> A of this embodiment includes a mounting base 12 for detachably mounting on the distal end portion 2 b of the handpiece 2, and a shaft portion 13 coupled to the mounting base 12. And a working end portion 14 coupled to the tip end of the shaft portion 13. Since the configurations of the mounting base 12 and the shaft 13 are the same as those in the above example, the same reference numerals are given to the common parts, and descriptions thereof are omitted. The working end portion 14 of the scaler tip 11A of this embodiment is composed of a right cone 22 as in the example shown in FIG. 2, but the angle formed between the shaft center 13a of the shaft portion 13 and the bottom surface 22a of the right cone 22. α is an acute angle. That is, the bottom surface 22a has a conical shape recessed toward the top of the right cone 22 along the axis 13a. Therefore, even if the outer shape is the same as that of the right cone 15 shown in FIG. The angle β formed between the bottom surface 22a and the generatrix 22b in the right cone 22 is smaller than the angle β in the right cone 15 shown in FIG. 2, and the circular peripheral edge 22c of the bottom surface 22a is formed in a sharper edge shape. Is done.

  Therefore, when root canal treatment as shown in FIG. 3 is performed using the scaler tip 11A of this embodiment, the cutting and removal of the filler g is more efficiently performed by the circular peripheral edge portion 22c having a remarkable knife edge shape. . In addition, since the bottom surface 22a is recessed on the top side of the right cone 22, the bottom surface 22a functions like a saucer when the cut filler g is taken out of the root canal T1, and the removal is made smooth. . The configuration of the working end portion 14 of this embodiment can also be applied to the examples shown in FIGS. 4 to 7, thereby synergizing the characteristics of this embodiment with the functions of each example, and It can be closer to the scaler chip that can meet your needs.

  9 and 10 show a handpiece including a vibration cutting tool for treating a root canal according to still another embodiment of the present invention. A hand piece 2A shown in FIG. 9 has a vibrator 3 built in its grip 2a and a power medium supply path for supplying driving force to the vibrator 3 in the base 2c, similarly to the hand piece 2 shown in FIG. Can be connected to the medium supply tube 4. Further, an end chip 20 is detachably attached to the distal end portion 2b of the handpiece 2A. The end chip 20 includes a male screw portion 20a at the base portion and a scaler chip mounting portion 20b at the tip portion. The male screw portion 20a can be screwed into a female screw portion (not shown) formed at the distal end portion 2b of the handpiece 2A, and a tool such as a wrench is applied to the milling cut portion 20c formed at the body portion of the end chip 20. Thus, the end chip 20 can be attached to and detached from the handpiece 2A by screwing and loosening the male screw portion 20a.

In addition, the scaler chip 11B of the present embodiment includes a shaft portion 13 that is bent as shown in the drawing, and a working end portion 14 that is integrally coupled to the tip thereof. As the working end portion 14, a conical or pyramidal shape as in each of the above examples is similarly formed. The scaler chip 11 </ b> B has a shaft portion 13 and is detachably attached to the end chip 20. That is, the scaler tip mounting portion 20b includes a nut portion and a collet chuck portion provided in the nut portion. As shown by a single arrow in FIG. 9B, the collet chuck portion has the shaft portion 13 attached to the collet chuck portion. The scaler chip 11B can be fixed to the end chip 20 by the collet chuck portion by inserting the straight base portion 13a and tightening the nut portion. As shown in FIG. 9A, also in the handpiece 2A to which the scaler chip 11 is attached via the end chip 20, the vibration from the vibrator 3 is propagated to the working end 14 at the tip of the scaler chip 11B. Thus, root canal treatment similar to that described above can be performed.
In this embodiment, the water supply conduit 12c, the water injection conduit 12d, and the water inlet 12e are not shown, but are formed in the end chip 20 and can function in the same manner.

  As with the handpiece 2 shown in FIG. 9, the handpiece 2 </ b> B shown in FIG. 10 has a vibrator 3 built in the grip portion 2 a and a power medium supply path for supplying driving force to the vibrator 3 in the base 2 c. Can be connected to the medium supply tube 4. Further, an end chip 21 different from the example of FIG. 9 is detachably attached to the distal end portion 2b of the handpiece 2B. The end chip 21 includes a male screw portion 21a at the base portion, a scaler chip mounting portion 21b at the tip portion, and a fixing screw 21c screwed to the mounting portion 21b. The male screw portion 21a can be screwed into a female screw portion (not shown) formed at the distal end portion 2b of the handpiece 2B, and a tool such as a wrench is made to act on the milling cut portion 21d formed in the body portion of the end chip 21. Thus, the end screw 21 can be attached to and detached from the handpiece 2B by screwing and loosening the male screw portion 21a.

Further, the scaler chip 11C of the present embodiment includes a straight shaft portion 13 and a working end portion 14 integrally formed at the tip thereof as shown in the drawing. As the working end portion 14, a conical or pyramidal shape as in each of the above examples is similarly formed. As shown by a single arrow in FIG. 10 (b), the scaler tip 11C is the base of the shaft portion 13, and the end tip 21 is longer than the small hole (not shown) formed on the side of the mounting portion 21b. Insert so that it is perpendicular to the direction. Then, the fixing screw 21c is screwed into the attachment portion 21b from the opening at the tip thereof, and the base portion of the shaft portion 13 is pressed against the inner wall of the attachment portion 21b by the tightening force of the fixing screw 21c, so that the scaler chip 11C is end. Fixed to the chip 21. As shown in FIG. 10A, also in the handpiece 2B to which the scaler chip 11C is attached via the end chip 21, the vibration from the vibrator 3 is propagated to the working end 14 at the tip of the scaler chip 11C. Thus, root canal treatment similar to that described above can be performed.
In this embodiment, the water supply pipe 12c, the water injection pipe 12d, and the water inlet 12e are not shown, but are formed in the end chip 21 and can function in the same manner.

  In addition, the shape of the cone-shaped body which comprises the action | operation end part 14 is not restricted to an illustration, For example, polygonal pyramids, such as a triangular pyramid, a pentagonal pyramid, a hexagonal pyramid, Furthermore, the cross-sectional star shape is also employable. . Further, the shaft portion 13 is not limited to a letter shape as illustrated or a straight shape, and may be a shape curved in an arc shape, for example. Furthermore, although the foot controller 6 was illustrated as a drive operation part in FIG. 1, it is not restricted to this, What is attached to other dental medical devices, such as a dental unit provided with the control box 50 itself or a medical table. It may be. Furthermore, the vibration cutting tool for root canal treatment and the vibration cutting device for root canal treatment of the present invention are used for root canal treatment, and are applied to the removal of calculus from periodontal pockets and the formation of tooth cavities. You can also. Further, the root canal treatment vibration cutting device 1 shown in FIG. 1 can be configured as a device combined with a root canal length measuring device.

DESCRIPTION OF SYMBOLS 1 Vibration cutting device for root canal treatment 2, 2A, 2B Handpiece 2a Grasping part 2b Tip part 2c Base part 3 Vibrator 4 Medium supply tube 5 Control part 6 Drive operation part 11 Scaler tip (vibration cutting tool for root canal treatment)
13 Axis part 13a Axis center 14 Working end part 15-17, 19, 20, 22 Right cone (cone)
18 Regular square pyramid (cone)
15a to 20a, 22a Bottom surface α Angle formed between bottom surface and axis T1 Root canal

Claims (4)

In a vibration cutting tool for treating a root canal comprising a shaft portion and a working end portion coupled to the tip of the shaft portion,
The working end portion is formed of a conical body tapered toward the tip, and is coupled to the shaft portion at substantially the center of the bottom surface of the conical body, and the shaft center of the shaft portion and the conical body The angle formed with the bottom surface is a right angle or an acute angle, and the entire working end including the bottom surface is set to a size that can be inserted into the root canal from the root canal of a tooth. Vibration cutting tool for root canal treatment. In the vibration cutting tool for root canal treatment according to claim 1,
A vibration cutting tool for treating a root canal, wherein the cone is a cone. In the vibration cutting tool for root canal treatment according to claim 1,
A vibration cutting tool for treating a root canal, wherein the cone is a pyramid. A handpiece incorporating the vibrator in the gripping part;
The vibration cutting tool for root canal treatment according to any one of claims 1 to 3, wherein the vibration by the vibrator is propagated by being detachably attached to a distal end portion of the handpiece,
A medium supply tube that is connected to the base of the handpiece and includes a power medium supply path for supplying a driving force to the vibrator;
A control unit for controlling the driving force;
A drive operation unit for operating the control unit;
A vibration cutting device for treating root canals.

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