JPH0367412B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to dental treatment instruments such as scalers, explorers, cul-measuring needles, and filling tools.

[Prior Art] Conventionally, each dental treatment instrument such as a scaler, explorer, cul-measuring needle, or filling tool has a handle part held by the operator and a treatment tool part used for the operation formed integrally. ing. Further, a three-way dental syringe that spouts compressed air and water is constructed as a single unit independent of the above-mentioned treatment instrument.

[Problems to be Solved by the Invention] Dental treatment instruments such as scalers, explorers, cul-measuring needles, or filling tools have a handle portion and a treatment tool portion integrally formed, so the handle portion is This is present in each treatment instrument and is extremely uneconomical in terms of material consumption.

Further, when the above-mentioned treatment instrument is used, when the operator is alone, the operator operates the treatment instrument with one hand and operates the dental three-way syringe with the other hand. Alternatively, when an assistant is present, the surgeon operates the treatment instruments and the assistant operates the dental three-way syringe.

In this way, when using the above treatment instrument, a dental three-way syringe is also used at the same time.

For example, when using a scaler, a dental three-way syringe is used to remove and clean tartar and bleeding that have peeled off from the tooth surface.

Having the surgeon use both hands when using the above-mentioned therapeutic instruments is extremely troublesome for the surgeon who performs delicate work, and also causes two problems for the patient.
Having any type of appliance inserted into the oral cavity is extremely uncomfortable. Or, if you need the help of an assistant, it will increase the human cost.

[Means for Solving the Problems] The present invention provides compressed air and water intake means at one end of the handpiece body held by the operator, and compressed air and water jetting means is provided at the other end of the handpiece. a passage means communicating between the intake means and the ejection means in the handpiece; a coupling means at the other end of the handpiece; a coupling portion engaging the coupling means at one end; Multiple types of instruments equipped with treatment tools suitable for the treatment are prepared, the instruments are connected to the handpiece body, and compressed air and water are ejected from the ejection means when necessary. .

[Example] An example of the present invention will be described with reference to the drawings. 1st
The figure is a longitudinal cross-sectional view of one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A' in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B-B' in FIG. , Figures 4 to 6
The figure is a diagram showing other instruments.

In this embodiment, the dental handpiece 2 of the present invention is comprised of a handpiece body 4 and an instrument 6.

The handpiece body 4 has a hollow cylindrical handle sheath 8 that serves as a holding portion for the operator. A flow rate adjustment section 16 serving as a flow rate adjustment means for adjusting the flow rate of compressed air and water is connected to the rear part of the pod 8, and an intake section 10 serving as a means for taking in the compressed air and water is further connected to the rear part of the flow rate adjustment section 16. are connected. The front part of the sheath 8 is provided with a spouting part 12 that serves as a spouting means for compressed air and water, and further provided with a connecting part 14 adjacent to the spouting part 12 and serving as a connecting means for an instrument. .

Inlet 10 is configured to engage the end of a hose (not shown) extending from a dental unit that supplies compressed air and water to a dental turbine or dental handpiece.

The compressed air flow rate regulator 24 includes a fan-shaped plate 2
8 is inserted into an adjustment groove 30 formed by cutting out the flow rate adjustment part 16 in a semicircular shape, and is fixed to the flow rate adjustment ring 26 with a fixing screw 32. Here, the compressed air passage 22 (indicated by a broken line in the drawing) in the flow rate adjustment part 16, that is, the compressed air passage 22 from the compressed air intake port 18 to the adjustment groove 30 and from the adjustment groove 30 to the hollow part 64 is the third As shown in the figure, it consists of a plurality of passages (three in the figure). In the above compressed air flow rate regulator 24, the flow rate adjustment ring 2
6 is rotated in the direction of the arrow in the figure, the plate 28 sequentially closes the compressed air passage 22, making it possible to adjust the flow rate of compressed air.

The water flow rate regulator 38 has a needle valve receiver 4 inserted into an adjustment hole 44 opened to the water passage 36 in the flow rate adjustment section 16.
2. A needle valve 40 is incorporated. If the needle valve 40 is rotated in the water flow rate regulator 38 described above, the flow rate of water flowing in from the water intake port 20 can be adjusted.

The connecting part 14 of the instrument 6 has a collet fixture 50 connected to the front part of the handle sheath 8, and the collet chuck 48 is connected to the collet fixture 50.
is fixed via a spring 54 and a sliding tube 52. The instrument 6 also includes a connecting portion 58 at its rear end having a shank diameter that engages with the inner diameter of the collection chuck 48, and a treatment tool 60 (FIG. 1 shows a scaler) suitable for treatment at its distal end.

When connecting the connecting portion 14 and the instrument 6 as described above, if the sliding tube 52 is moved backward against the spring 54, the collection chuck 48 opens and the instrument 6 can be inserted. 6 Sliding tube 52 after insertion
When the movement is released, the sliding tube 52 is pushed forward by the spring to close the collection chuck 48 and connect the instrument 6. Further, when taking out the instrument 6, the instrument 6 can be easily taken out from the collection chuck 42 by moving the sliding tube 52 rearward in the same manner as described above. Therefore, the operator can easily change instruments depending on the treatment. In other words, the instrument 6 is used when removing tartar, the instrument 92 is used as the explorer for the treatment tool 60 during an intraoral examination, the instrument 94 is used as the treatment tool 60 as a cul-measuring needle when measuring the cul-de-sac, or the instrument 94 is used when filling the cul-de-sac. The instrument 96, which is a filling tool, can be easily replaced with the treatment tool 60.

Furthermore, it is of course possible to include an instrument having other therapeutic instruments not described or illustrated in this embodiment, and instruments other than those described above are included in the present invention. Furthermore, a rotation stopper groove 62 is provided on the rear end surface of the instrument 6 to engage with a pin 56 provided on the collet fixture. When the instrument 6 is connected to the collection chuck 48, the rotation preventing groove 62 engages with the pin 56 to prevent the instrument 6 from rotating when rotational force is applied to the instrument 6 during treatment. .

The compressed air and water spout 12 consists of an inner water pipe 46 and an outer compressed air pipe 34, which are arranged coaxially with the collet fixture 50. water pipe 4
6 extends further from the collet fixture 50 and reaches a cylindrical recess 66 provided at the front end of the flow rate adjustment section 16, to which an O-ring fitting 68 for mounting an O-ring is fixed. There is. Further, the tips of the water pipe 46 and the compressed air pipe 34 are located in front of the sliding tube 52 through pipe holes 70 provided so as not to affect the pipes when the sliding tube 52 slides. The tip of the water pipe 46 is located slightly forward of the tip of the compressed air pipe 34.

The hollow portion 64 of the handle sheath 8 forms a compressed air passage, and the compressed air passage 2 in the collect fixture 50
2 communicates from the hollow portion 64 to a compressed air chamber 72 that serves as a storage chamber for compressed air. O-rings 74 to 90 provide compressed air or water seals, respectively.

In the above configuration, a foot switch (not shown) connects a hose extending from the dental unit to the intake part 10 and controls the supply of compressed air and water.
By selectively operating the pipe, only compressed air, only water, or a mixed spray of compressed air and water can be selectively ejected from the tip of the pipe.

Furthermore, if the part held by the operator, that is, the shape of the handle sheath 8, is constructed in the same way as the handle part of a rotary treatment instrument such as a turbine handpiece, micromotor, or air motor, the operator can already Since the patient is familiar with the operation of rotating treatment instruments, he or she can handle the dental handpiece of the present invention without any discomfort.

[Effects of the Invention] Since the dental handpiece of the present invention allows various instruments to be exchanged depending on the treatment, one handpiece body can be used as various instruments. Therefore, the problem of having to use an instrument with a plurality of handles can be completely solved, and materials can be used more effectively.

Moreover, it has become possible for the surgeon to perform treatment using only one hand. Therefore, it eliminates the complication of the operator, eliminates the discomfort of the patient, and eliminates the need for assistance from an assistant, resulting in a reduction in personnel costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a dental handpiece according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG.
Figure 3 is a sectional view taken along the line B-B' in Figure 1, Figure 4 is a diagram showing an instrument in which the treatment tool is an explorer, and Figure 5 is a diagram showing an instrument in which the treatment tool is an cul-measuring needle. FIG. 6 is a diagram showing an instrument in which the treatment tool is a filling tool. 2...Dental handpiece, 6...Instrument, 10...Intake part, 12...Ejection part, 14
...Connection part, 16...Flow rate adjustment part, 48...Collection chuck.

Claims (1)

[Scope of Claims] 1. A dental handpiece, the dental handpiece comprising a handpiece body that can be held by hand, and a dental handpiece that is replaceably and removably held in the handpiece body. a manual instrument, the handpiece body having a pressure gas intake means and a pressure liquid intake means at one end thereof, a working fluid ejection means at the other end, and a dental manual instrument. a connecting means for holding the ment in a replaceable and detachable manner, and a passage means for communicating the two intake means and the ejection means between the one end and the other end, and the pressurized gas The intake means receives a supply of pressurized gas via an external gas foot switch that controls on/off the supply of pressurized gas,
The pressure liquid intake means turns on the supply of pressure liquid.
Pressure liquid is supplied through an external foot switch for liquid that is turned off, and the jetting means is configured to supply pressurized liquid or pressurized gas by operating the two external foot switches. and a mixture thereof, depending on the process of the dental procedure, the dental procedure using the manual instrument, the pressurized liquid, the pressurized gas, and their mixtures. A dental handpiece characterized in that it is possible to perform a dental procedure using any one of the working fluids of the mixture. 2. The dental handpiece according to claim 1, further comprising flow rate adjusting means for adjusting the flow rate of the working fluid flowing through the passage means. 3. The dental clinic according to claim 1 or 2, wherein the manual instrument is one selected from the group consisting of a scaler, an explorer, a cul-measuring needle, and a filling tool. handpiece. 4. The dental handpiece according to claim 1, wherein the shape of the holding portion of the handpiece body is similar to the shape of the holding portion of the turbine handpiece.