JPH0530426Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a convenient injection method for injecting impression material around the teeth when taking tooth impressions in the combined impression method for the treatment of cavities in dentistry. The present invention relates to a syringe for injecting dental impression material as a container.

[Conventional technology]

The syringe for injecting dental impression material is shown in Figures 7 and 8.
As shown in the figure, it is of a syringe type, consisting of a cylinder body 1 having an impression material dispensing needle 2 at its tip, and a piston 2 inserted into the cylinder body 1.

In addition, although FIGS. 7 and 8 show a cartridge system in which a cartridge 4 filled with impression material is set in the cylinder body 1, there is also a cartridge system in which the impression material is directly sucked up and stored in the cylinder body 1. There are also many types that are poured out.

[The problem that the idea aims to solve]

In the dental impression material injection syringe shown in FIG. 7, since the impression material injection needle 2 extends straight from the tip of the cylinder body 1, it is difficult to inject the dental impression material into the back side of the teeth.

On the other hand, in the dental impression material injection syringe shown in FIG. 8, the impression material injection needle 2 is bent at an appropriate angle, so that it can also be used for injection into the back side of teeth.

However, the impression material pouring needle 2 is usually made of stainless steel and is sufficiently hardened and hard.
Even in the case shown in the figure, the set bending angle cannot be changed. On the other hand, teeth are lined up all the way to the back of the mouth and are divided into the upper and lower jaws, so depending on the position of the teeth, this preset bending angle may not be sufficient, and in some cases it may even be difficult to use. be.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a convenient dental impression material injection syringe that can reliably reach any position since the bending angle of the impression material injection needle can be freely varied.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a syringe for injecting dental impression material, which is a combination of a cylinder body having an impression material dispensing needle at the tip and a piston inserted into the cylinder body, in which the cylinder body is made of synthetic resin. The tip is integrally molded and protrudes thinly, and this protruding part holds the root part of the impression material dispensing needle.The impression material dispensing needle is made of stainless steel, and at least the intermediate part exposed from the protruding part of the cylinder body is made of stainless steel. The gist of this is to have flexibility in the unbaked state.

[Effect]

According to the present invention, the impression material dispensing needle at the tip of the cylinder body is made flexible by leaving at least the middle part exposed from the protruding part of the cylinder body in an unburned state, so that it can be bent by hand. You can change the angle freely.

In addition, in the impression material pouring needle, the part that bends is the part immediately after it comes out from the protrusion of the cylinder body,
Since the rear root portion is entirely held by the protrusion, it will not break in a way that would crush the needle hole unless it is bent at an extreme angle.

Furthermore, the impression material pouring needle is flexible in its unbaked state, so if you bend it and do not continue to apply force, it will exert its restoring force and automatically return to its original state. It maintains its bent state even if you release your hand.

〔Example〕

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

FIG. 1 is a vertical side view showing a first embodiment of the dental impression material injection syringe of the present invention, and FIG. 2 is a front view of the same, showing a type that does not use a cartridge.

In the figure, 1 is a cylinder body made of synthetic resin made of polycarbonate, and 3 is a piston inserted into this cylinder body.

In this embodiment, a pair of finger levers 5 are provided on the outer periphery of the cylinder body 1 and protrude in the diametrical direction at one end.
A short tube body 5 having a protruding shape was fitted therein, a handle 6 was attached to the root of the piston 3, and a groove was cut in the circumferential direction at the tip of the piston 3, and a ring seal 11 was fitted therein.

This short tube body 5 is provided with a back split 5b in the length direction so that it can be expanded to some extent. Further, the cylinder body 1 is thickened near the insertion end of the piston 3, and a locking step 7 for the short tube 5 is formed on the outside.

The impression material dispensing needle 2 provided at the tip of the cylinder body 1 is made of stainless steel, and its root portion is held by a protrusion 1a formed by integrally molding the tip of the cylinder body 1 into a thin protrusion, and one end is attached to the cylinder body 1. protrude inside.

The impression material dispensing needle 2 is made flexible by annealing (semi-annealing) 8 the entire portion exposed to the outside from the protruding portion 1a or the intermediate portion immediately after the protruding portion 1a.

In order to provide the impression material pouring needle 2 in the cylinder body 1, the needle 2 can be taken in and fixed when the cylinder body 1 and the protruding portion 1a are molded.

In addition, in order to fit the short tube body 5 into the cylinder body 1, the cylinder body 1 must be inserted into the short tube body 5 from the tip end.
All you have to do is insert it into the .

In this way, by moving the piston 3 inserted into and out of the cylinder body 1, the impression material is sucked into the cylinder body 1 from the tip of the impression material dispensing needle 2, and the sucked impression material is poured onto the teeth. Since the impression material dispensing needle 2 is made flexible by making at least the middle part exposed from the protruding part 1a of the cylinder main body 1 into an annealed state 8, it can be bent by hand and the angle can be adjusted freely at this part. can be changed, and the angle can be determined according to the position of the tooth 9 to be poured.

Furthermore, the impression material pouring needle 2 is made flexible in the unbaked state 8, so if you do not continue to apply force when bent, it will exhibit restoring force and automatically return to its original state. It will not bend and will maintain its bent state even if you remove your hand.

In addition, if you want to change the location of use, you can bend it further by hand to create a different angle, and the bending direction can be selected from all directions: up, down, left and right.

3 and 6 show a second embodiment of the present invention, which is of a cartridge type.

In the figure, reference numeral 10 denotes a cartridge containing impression material that is housed in the cylinder body 1. The cylinder body 1 is somewhat shorter than the cartridge 10, and the impression material insert made of stainless steel is provided at the tip of the cylinder body 1. The ejecting needle 2 holds the root portion at the protruding part 1a formed by integrally molding the tip of the cylinder body 1 and protruding thinly, as in the first embodiment,
One end is made to protrude inside the cylinder body 1.

The impression material dispensing needle 2 is made flexible by annealing (semi-annealing) 8 the entire portion exposed to the outside from the protruding portion 1a or the intermediate portion immediately after the protruding portion 1a.

Further, at the rear end of the cylinder body 1, a key 12 consisting of an axially protruding strip is formed on the outer circumferential wall so as to face each other. The key 12 is tapered toward the rear end of the cylinder body 1 and is easy to insert, and has a locking step 12a.

Furthermore, a holding tube 13 having a diameter one size larger than that of the cylinder main body 1 is fitted to the rear end of the cylinder body 1, and as shown in FIG. A key introducing groove 14 for introducing the key 12 is formed in the key introducing groove 14, and as shown in FIG. Part 15
make a. Then, align the key 12 with the key groove 14, insert the rear end of the cylinder body 1 into the tip of the holding tube 13, and when the key 12 comes out of the key introduction groove 14, either one of the cylinder body 1 or the holding tube 13 is inserted. By rotating it a little, the locking step 12a and the locking step 15a are engaged and fitted together.

An internal thread 16 is provided on the inner circumferential surface of the rear end of the holding tube 13, and the cover body 18 is fitted to the rear end of the holding tube 13 by screwing the external thread 19 on the outer circumferential surface of the distal end to the internal thread 16.

This cover body 18 has a finger hook lever 20 rotatably fitted to the outside.

The piston rod 3a of the piston 3 penetrates the cover body 18 and inserts its front part into the holding tube 13.The piston rod 3a has a bulging head 3b integrally molded at its tip, and a ring-shaped ring is formed on the outside of the piston rod 3a. A presser member 21 is slidably fitted, and a spring 22 is interposed between the presser member 21 and the cover body 18.

The holding member 21 has a flat front end surface, and this surface comes into contact with the end surface of the cartridge 10.

Although not shown, a handle similar to the handle 6 shown in FIG. 1 is detachably attached to the rear end of the piston rod 3a by means of a screw connection.

In this way, the cartridge 1 protrudes from the rear end of the cylinder body 1 and is located inside the holding tube 13.
0 end contacts the recess 21a of the holding member 21,
The pressing member 21 presses and fixes the cartridge 10 by the elasticity of the spring 22.

In addition, when assembling the holding tube 13, etc., the piston rod 3a before the handle is attached to the rear end is pressed from the rear end by the pressing member 21, the spring 22, and the cover body 18.
The cover body 18 may be screwed into the holding tube 13 in such a manner that the holding member 21 and the spring 22 are accommodated in the holding tube 13.

When using such a syringe, the above-mentioned feature is that the impression material dispensing needle 2 can be bent by hand to freely change its angle, and that the angle can be determined to match the position of the tooth 9 from which the dispensing material is to be dispensed. This is the same as the first embodiment.

Furthermore, in this embodiment, the piston rod 3a is more secure than the conventional example shown in FIG. Even if force is applied to the cylinder body 1 during pushing, this joint will not be easily damaged and safety can be maintained.

[Effect of idea]

As mentioned above, the dental impression material injection syringe of the present invention is easy to use because the bending angle of the impression material injection needle can be freely varied, allowing the needle tip to reach any position reliably. It's good.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing a first embodiment of the dental impression material injection syringe of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a longitudinal side view showing the second embodiment, and FIG. is a sectional view taken along the line A-A in Fig. 3, and Fig. 5 is a sectional view taken along line A-A in Fig. 3.
-B sectional view, FIG. 6 is a front view of the same as above, and FIGS. 7 and 8 are perspective views showing the conventional example. 1...Cylinder body, 1a...Protrusion part, 2...
...impression material dispensing needle, 3...piston, 3a...rod, 3b...bulging head, 4...cartridge, 5
...Short tube body, 5a...Finger lever, 5b...
Back split, 6...handle, 7...locking step, 8...annealing, 9...tooth, 10...cartridge, 11...
... Ring seal, 12 ... Key, 12a ... Locking step, 13 ... Holding tube, 14 ... Key introduction groove, 1
5... Thick part, 15a... Locking step part, 16... Keyway, 17... Internal screw, 18... Cover body, 19
...External screw, 20...Finger hook lever, 21...Press member, 22...Spring.

Claims (1)

[Scope of utility model registration request] In a syringe for injecting dental impression material, which is a combination of a cylinder body with an impression material dispensing needle at the tip and a piston inserted into the cylinder body, the cylinder body is made of synthetic resin, and its tip is integrally molded and protrudes thinly. This protrusion holds the base of the impression material dispensing needle, and the impression material dispensing needle is made of stainless steel, and at least the intermediate portion exposed from the protrusion of the cylinder body is kept unburned to ensure flexibility. A syringe for injecting dental impression material, characterized by having a syringe.