JPH0446733Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention transmits the vibration of an ultrasonic vibrator to a tooth, a cast restoration, etc. when extracting a tooth or removing a cast restoration from a tooth. It concerns ultrasonic chips.

(Conventional technology) Conventionally, when extracting a tooth or removing a cast restoration from a tooth while applying ultrasonic vibration, it is possible to extract the tooth or remove the cast restoration without causing pain to the patient, and the affected area recovers quickly. Also, when extracting a tooth or removing a cast restoration, the surgeon does not have to apply strong force to the tooth or cast restoration.
It was found that it required less effort on the part of the caster.

Conventionally, an ultrasonic tip attached to the tip of an ultrasonic handpiece is brought into contact with a tooth, cast restoration, etc., and the tooth, cast restoration, etc. is vibrated ultrasonically to extract the tooth or remove the cast restoration. It was removed from the tooth.

(Problem that the invention aims to solve) However, because the tip of the ultrasonic tip is flat and slippery, the contact between the ultrasonic tip and the tooth, cast restoration, etc. becomes unstable, and the ultrasonic vibrations become unstable. There were problems in that the transmission efficiency was lowered and the operability of the ultrasonic handpiece was lowered. Furthermore, since the ultrasonic tip is straight, it is difficult to bring the tip end surface of the ultrasonic tip into contact with a desired tooth surface, and there is a problem in that ultrasonic vibrations cannot be reliably transmitted.

The present invention was made in view of these problems, and aims to provide an ultrasonic tip that is hard to slip and that can be easily brought into contact with a desired tooth surface.

(Means for Solving the Problems) In the present invention, the tip surface of the ultrasonic tip is provided with irregularities, and the ultrasonic tip itself is curved or bent.

(Function) Since the tip surface of the ultrasonic tip is uneven, it becomes difficult for the ultrasonic tip to slip, and since the ultrasonic tip itself is curved or bent,
It becomes easier to bring the ultrasonic tip into contact with the desired tooth surface.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 1a, b, and c show the configuration of a specific example of an embodiment of the present invention, in which 1 indicates an ultrasonic transducer (not shown) and a horn (not shown) fixed to the tip of the ultrasonic transducer. (not shown), etc., and 2 is a straight ultrasonic tip (hereinafter referred to as the tip) detachably attached to the horn.
Then, on the tip end surface of this chip 2, there are marks b and c in Fig. 1.
As shown in FIG. 3, a lattice-shaped protrusion 3 or a recess 4 forming the lattice-shaped protrusion 3 is provided.

In this specific example configured in this way, chip 2
Even if the ultrasonic transducer is driven by bringing the tip end surface of the tip into contact with a tooth, a cast restoration (both not shown), etc., the tip 2 will not move because the protrusion 3 or recess 4 is provided on the tip end surface of the tip 2. As the coefficient of friction between the tip 2 and the tooth, cast restoration, etc. increases, the tip 2
becomes difficult to slip off.

FIG. 2 shows the configuration of another specific example of one embodiment of the present invention, in which the same reference numerals as those in FIG. 1 indicate the same parts, and 5 indicates the chip 2.
This is a V-shaped groove formed on the tip surface of the

In this specific example configured in this way, chip 2
With the groove 5 on the tip of the tip straddling the corner of the tooth, cast restoration, etc., the tip 2 is brought into contact with the corner of the tooth, cast restoration, etc.
The contact position will not shift at all.

Note that the shape of the protrusions or recesses is not limited to a grid-like shape; for example, the tips of the protrusions may be points.

FIG. 3 shows the structure of another embodiment of the present invention, in which the same reference numerals as those in FIG. A male thread 7 is a bottomed cylindrical tip piece with a female thread (not shown) carved into the inner circumferential wall surface and a lattice-shaped protrusion 3 or a recess 4 forming the lattice-shaped protrusion 3 on the tip surface corresponding to the bottom surface. , 8 are notches formed in the rear outer circumferential wall surface of the tip piece 7 for fitting a tip piece attachment/detachment tool.

In this specific example configured in this way, chip 2
When the tip piece 7 is screwed onto the tip of the tip piece 7 and the tip surface of the tip piece 7 is brought into contact with a tooth, a cast restoration, etc. while vibrating the ultrasonic vibrator, ultrasonic vibrations are transmitted through the tip 2 and the tip piece 7. The ultrasonic wave is transmitted to the tooth, cast restoration, etc., but since the protrusion 3 is in contact with the tooth, cast restoration, etc., the ultrasonic tip becomes difficult to slip. If the projection 3 on the tip of the tip piece 7 becomes worn and the ultrasonic tip becomes slippery, replace it with a new tip piece 7.

FIG. 4 shows another configuration of another embodiment of the present invention, in which the same reference numerals as those in FIG. 11 is a notch formed on the rear outer peripheral wall of the mounting ring 9 for fitting a tip piece attachment/removal tool, and 12 is a notch for fitting a tip piece attachment/removal tool. A lattice-shaped projection 3 or a recess 4 forming a lattice-shaped projection 3 on the surface
It is a chip piece with a flange 13 protruding in the radial direction from the outer circumferential wall surface of the rear end.
The outer diameter of the ring 3 is approximately equal to or slightly smaller than the inner diameter of the mounting ring 9.

In this specific example configured in this way, the mounting ring 9 into which the tip piece 12 is inserted is screwed onto the tip end of the tip 2, and the tip piece 12 is attached so that the tip end surface of the tip piece 12 protrudes from the end surface of the flange 10. Attach it to the tip of tip 2. If the projection 3 on the tip of the tip piece 12 becomes worn and the ultrasonic tip becomes slippery, replace it with a new tip piece 12.

FIG. 5 shows still another configuration of another embodiment of the present invention, in which the same reference numerals as those in FIG. The mounting hole 15 is a chip piece having a lattice-shaped protrusion 3 or a recess 4 forming the lattice-shaped protrusion 3 on the tip surface, and a mounting shaft 16 protruding rearward on the rear end surface. The outer diameter of the mounting shaft 16 is equal to the inner diameter of the mounting hole 14, or the outer diameter of the front end of the mounting shaft 16 is slightly larger than the inner diameter of the mounting hole 14, and the outer diameter of the rear end of the mounting shaft 16 is equal to the inner diameter of the mounting hole 14. It may be tapered to be slightly smaller than the inner diameter. 17 is chip piece 1
This is a notch formed in the rear outer circumferential wall of No. 5 for fitting a tip piece attachment/detachment tool.

In this specific example configured in this manner, the mounting shaft 16 of the tip piece 15 is press-fitted into the mounting hole 14 of the tip 2, and the tip piece 15 is attached to the tip of the tip 2. If the projection 3 on the tip of the tip piece 15 becomes worn and the ultrasonic tip becomes slippery, replace it with a new tip piece 15.

FIG. 6 shows still another configuration of another embodiment of the present invention, in which the same reference numerals as those in FIG. 3 or a recess 4 forming a lattice-like protrusion 3
It is a chip piece with a

In this specific example constructed in this way, the tip piece 18 is soldered to the tip end surface of the tip 2 with wax 19. If the projection 3 on the tip of the tip piece 18 becomes worn and the ultrasonic tip becomes slippery, replace it with a new tip piece 18.

Note that grooves 5 may be provided on the tip surfaces of the tip pieces 7, 12, 15, and 18 instead of the protrusions 3 or recesses 4.

7 and 8 show the configuration of a specific example of still another embodiment of the present invention, in which reference numeral 20 denotes an entirely curved ultrasonic tip (hereinafter referred to as a tip);
Reference numeral 21 denotes an ultrasonic chip (hereinafter referred to as a chip) having a bent tip, and a mounting screw 22 for attaching to the horn is provided protruding from the rear end surface of these chips 20 and 21.

In this specific example configured in this way, chip 2
Since the tip 20 is entirely curved and the tip 21 is bent, the tip 20 can easily and reliably bring the tip 20 into contact with a desired tooth surface.

Note that the tips 20 and 21 are provided with lattice-shaped protrusions 3 or recesses 4 forming the lattice-shaped protrusions 3 as shown in FIG. 1, or grooves 5 as shown in FIG. Alternatively, the tips 20 and 21 may have protrusions 3, recesses 4, or grooves 5 at their tips.
15 or 18 is removably attached by the means shown in FIGS. 3 to 6.

9, 10, 11, and 12 each show the structure of a specific example in another embodiment of the present invention, and the same reference numerals as those in FIG. 8 indicate the same parts. Also, 23 is chip 2
1 is an injection channel provided on the center line from the distal end surface of the mounting screw 22 to the rear end surface of the mounting screw 22, 24 is an injection channel provided from the middle side of the chip 21 to the center of the rear end surface of the mounting screw 22, and 25 is an ultrasonic handpiece. A water injection pipe 26 is built in the ultrasonic handpiece 1 and slightly protrudes forward from near the attachment part of the tip 21 at the distal end of the ultrasonic handpiece 1; This is a water injection pipe that protrudes forward along the tip 21 from near the attachment portion of the tip 21 at the distal end of the tip.

In a specific example configured like this, the tip 21 is attached to the tip of a horn with an injection channel (not shown) provided on the center line, and at the same time the ultrasonic transducer is driven, the tip surface of the tip 21 is attached to the tip of the horn. When water is injected between the tooth, the cast restoration, etc., or when water is injected toward the tip of the tip 21 from the water injection channel 24, the water injection pipe 25, or the water injection pipe 26, the chip 21, the tooth, the cast restoration, etc. are cooled. Therefore, even if teeth, cast restorations, etc. are subjected to ultrasonic vibration for a long time,
The chip 21, tooth, cast restoration, etc. no longer generate heat.

In addition, in the specific example shown in FIG.
Figure 3, Figure 4, Figure 5 or Figure 6 on the tip of 1.
When attaching the tip piece 7, 12, 15 or 18 by the means shown in the figure, holes for water passage may be made in the tip surface, peripheral wall, joint surface, etc. of the tip piece 7, 12, 15 or 18.

(Effects of the invention) As explained above, according to the invention, by providing anti-slip unevenness or grooves on the tip surface of the ultrasonic tip, the ultrasonic tip becomes difficult to slip, and the ultrasonic tip is vibrated. Since the vibration is reliably transmitted to the tooth, cast restoration, etc., the vibration transmission efficiency is improved, making it easier to perform tasks such as tooth extraction and removal of cast restorations while the ultrasonic tip is in contact with the tooth, cast restoration, etc. It also has the advantage of being quick.

[Brief explanation of drawings]

FIG. 1a is a front view of an ultrasonic handpiece equipped with an ultrasonic tip of the present invention, and FIG. 1b is a perspective view of the tip of a specific example of an embodiment of the present invention.
FIG. 1c is a cross-sectional view of the tip of one specific example in one embodiment of the present invention, FIG. 2 is a perspective view of the tip of another specific example in one embodiment of the present invention, and FIGS. The figures are respectively perspective views of the tip piece attachment means in other embodiments of the present invention, FIGS. 7 and 8 are front views of specific examples of still other embodiments of the present invention, and FIGS. 9 and 10, respectively. 11 and 12 are cross-sectional views of specific examples of still other embodiments of the present invention each equipped with water injection means, and FIGS. 11 and 12 are tips of specific examples of still other embodiments of the present invention each equipped with water injection means FIG. 2, 20, 21...Ultrasonic chip, 3...Protrusion, 4...Dent, 5...Groove, 7, 12, 15, 1
8... Chip piece, 23, 24... Water injection channel (water injection means), 25, 26... Water injection pipe (water injection means).

Claims (1)

[Scope of utility model registration request] An ultrasonic chip for transmitting vibrations of an ultrasonic vibrator to teeth, cast restorations, etc., characterized in that an anti-slip unevenness or groove is formed on the tip surface that comes into contact with the tooth. .