JP2897118B2 - External irrigation nozzle for surgical handpiece - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external water injection nozzle for a surgical handpiece, and more particularly to an external water injection nozzle mounted on the surgical handpiece and used for injecting cooling water to a treatment site.

[0002]

2. Description of the Related Art For example, when performing a drilling operation on a bone in an implant operation in an oral cavity, as shown in FIG.
The implant drill 4 is mounted on the head 2 of the surgical handpiece 1, and the external water injection nozzle 70 is mounted on the neck 3 of the handpiece 1 from its mounting part 71. Tube 5 extending from a supply (not shown) of a physiological saline for cooling at the end side
By drilling while injecting physiological saline from the distal end 73 of the nozzle portion 72 toward the drill 4, heat generated at the treatment site is removed.

[0003]

However, in the conventional external water injection nozzle 70, since the single-point water injection is performed through the small-diameter cylindrical tubular nozzle tip side 73, the water injection range is narrow, and particularly, a relatively long treatment tool for implants. In the drill 4, water injection only reaches a part of the drill 4, and the nozzle tip side 7
When the water injection from 3 is directed to the tip of the drill 4, if the drilling operation of the bone proceeds and the tip of the drill 4 enters the inside of the bone, the water injection is not applied to the drill 4 at all, and the cooling is insufficient. As a result, there is an adverse effect of damaging the bone tissue at the treatment site. It should be noted that there is also known an internal water injection type drill, but three fatal accidents due to air infarction which are considered to be caused by the use of the drill have been reported.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a surgical instrument capable of expanding a cooling water injection range and ensuring cooling of a treatment site. It is to provide an external water injection nozzle for a handpiece.

[0005]

In order to achieve the object of the present onset Ming, surgical hand
A mounting part for attaching to the neck of the piece and a supply of cooling water
Nozzle that connects the base end to a tube that extends from the supply
And a surgical procedure using the surgical handpiece.
Inject the cooling water to the place through the nozzle
In the external water injection nozzle for cooling the treatment point,
The tip side of the nozzle portion has an elliptical cross-sectional area.
It is characterized by gradually expanding toward the edge
You .

[0006] The distal end of the nozzle is angled so that water is injected toward a treatment tool attached to a surgical handpiece, and the nozzle substantially performs a nozzle function in the nozzle. The end side is a portion other than the tip side in the nozzle portion .

[0007] Here, the ellipse gradually expands toward the tip
The distal end having a circular cross-sectional area processes the major axis of the elliptical shape.
Place the tool in the same plane as the axis of the
Water will reach the area (excluding the upper end that deviates from the working area)
Design.

[0008]

BRIEF DESCRIPTION based examples and the like of the present invention in the accompanying drawings.

[0009] Figure 1 is the external water injection nozzle 10 (the present invention
Come off. ) Is a schematic side view showing a state attaching the nozzle 10 to a surgical handpiece 1 is shown in FIG.

The external water injection nozzle 10 is integrally provided with a mounting portion 11 for detachably mounting to the handpiece 1 and a nozzle portion 12 for water injection of cooling saline.

The mounting portion 11 is similar to the conventional mounting portion, and will not be described in detail. However, as shown in FIG. 3, which is a front view in the direction A in FIG. 1, a pair of left and right curved pieces 11a and 11b open upward. Hold the neck 3 of the handpiece 1 in a C-shape,
Portion 11 extending forward from each curved piece 11a, 11b
c and 11d are formed so as to press the head 2 of the handpiece 1 from both left and right sides.

On the other hand, the nozzle portion 12 is provided with a drill (drill for implant) attached to the head 2 of the handpiece 1.
4, the nozzles 13a and 13b are substantially angled toward 4, and substantially have a nozzle function, and the nozzle base 14 is a part other than the nozzles 13a and 13b.

The axes of the nozzle tips 13a and 13b and the axis of the drill 4 are in the same plane, and the upper tip 13
a is set so that its axis is slightly above the center of the drill 4, and the lower tip 13 b is set so that its axis is slightly above the lower end of the drill 4.

The proximal end 14 of the nozzle is connected at its rear end to a tube 5 extending from a source of saline (not shown) and, although apparently like a single tube, is actually shown in FIG. As shown, two tubes 14a having a half-moon cross section,
14b is joined like a single tube. In addition, tube 1
4a communicates with the tip 13a, and the pipe 14b communicates with the tip 13b, so that the nozzle 12 is branched into two water passages over the entire area.

External water injection nozzle 1 configured as described above
In the case of 0, the upper nozzle tip 13a can inject the physiological saline toward the upper half of the drill 4, and the lower nozzle tip 13b can inject the saline toward the lower half of the drill 4, respectively. Therefore, it is possible to reliably cool the treatment site where the drilling operation of the bone is performed by the drill 4 from the beginning of the operation to the finishing.

Further, since the nozzle portion 12 is branched over the entire area, the amount of water injected from the nozzle tip portions 13a and 13b can be made uniform.

FIG. 5 shows an external water injection nozzle 50 according to the present invention .
Since the nozzle 50 is the same as the nozzle 10 except for the nozzle 52 used for injecting physiological saline, the common parts are denoted by the same reference numerals as the nozzle 10 and described. Omitted.

The nozzle 52 comprises a nozzle tip 53 angled toward the drill 4 and a nozzle base 54 having a rear end connected to the tube 5.

As shown in FIG. 6, which is a cross section taken along the line BB of FIG. 5, the nozzle tip 53 is designed so that the cross-sectional area is an elliptical shape that is long in the vertical direction and gradually expands in a trumpet shape toward the tip. Is done. The inside of the nozzle base end portion 54 is not branched like the conventional one.

Therefore, the range of water injection from the nozzle tip 53 expands vertically and reaches almost the entire area of the drill 4.
As in the case of the nozzle 10, the treatment site can be reliably cooled. In addition, each nozzle tip 13a, 1 of the nozzle 10
3b may be enlarged like an elliptical trumpet like the nozzle tip 53 of the nozzle 50.

[0021]

As described above, in the external water injection nozzle according to the present invention , the front end side of the nozzle portion has an elliptical cross-sectional area and is gradually enlarged toward the front end. Thus, unlike the conventional external water injection nozzle, water does not reach a part of the treatment tool, and the treatment site can be cooled reliably.

[Brief description of the drawings]

1 is a side view schematically showing the external water injection nozzle.

FIG. 2 is a cutaway side view showing a state where an external water injection nozzle is mounted on a surgical handpiece.

FIG. 3 is a front view of the external water injection nozzle viewed from a direction A in FIG. 1;

FIG. 4 is an enlarged front view of a nozzle base end portion.

FIG. 5 is a side view showing an external water injection nozzle according to the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a cutaway side view showing a state in which a conventional external water injection nozzle is mounted on a surgical handpiece.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surgical handpiece 2 Head 3 Neck 4 Drill for implant 5 Tube 10, 50 External water injection nozzle 11 Mounting part 12, 52 Nozzle part 13a, 13b, 53 Nozzle tip part

Claims (1)

(57) [Claims] 1. A surgical handpiece attached to a neck.
Mounting section and a tube extending from the cooling water supply
A nozzle unit for connecting the proximal end side,
The cooling water before the treatment point
Water is injected through the nozzle to cool the treatment area
In the external water injection nozzle, the tip side of the nozzle
The surface area is elliptical and gradually expands toward the tip
Outside the surgical handpiece
Part water injection nozzle.