JPH067690Y2 - Dental laser handpiece - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention is mainly used for root canal treatment.
In addition, the present invention relates to a dental laser handpiece used for various dental treatments such as irradiating a living tissue with a laser beam to evaporate (dissect) the tissue or coagulate (stop blood).

(Prior Art) In a conventional dental laser handpiece of this type, a handgrip having a built-in light guide fiber connected to a laser generator is provided, and a tip of a light guide fiber portion protruding toward the tip side of the handgrip is provided. The type that performs dental treatment such as root canal treatment by inserting the part directly into the oral cavity, and various types of contact probes are attached to the tip of the above-mentioned light guide fiber part, and emitted from the light emitting end face at the tip of the light guide fiber part. It is known that a laser beam is incident on a contact probe and emitted from its tip.

(Problems to be solved by the invention) By the way, this kind of dental laser handpiece is intended for an unspecified large number of people, and a predetermined dental treatment is performed by inserting the tip part of the light guide fiber part or the contact probe into the oral cavity. Therefore, in order to prevent infection of hepatitis B, etc., and to carry out hygiene treatment, not only the part to be inserted into the oral cavity, but also the area where saliva, etc. that scatters during treatment adheres in the vicinity. There is a strong demand for sterilization and chemical treatment of all parts. From this point of view, looking at the above-mentioned conventional dental laser handpiece,
In the conventional method, it is necessary for the practitioner to perform sterilization or chemical treatment at least every time the practitioner changes, which is troublesome, and therefore there is a problem in reliability of sterilization.

Further, among the above-mentioned conventional examples, in the type in which the tip portion of the light guide fiber portion is directly inserted into the oral cavity, each time the subject changes, and the tip portion is damaged or deformed by heat or the like, the tip thereof is changed. In addition to cutting and removing the part, a means for removing the coating and the glad part of the tip of the light guide fiber, which is a newly inserted part in the oral cavity, was also adopted, but in this case, it is a very troublesome and time-consuming work. It was necessary and was a cause of impairing the smoothness and efficiency of treatment.

In particular, in the case of using a long insertion length in the oral cavity such as root canal treatment, if sterilization or chemical treatment is performed on the entire insertion portion, it takes a considerable amount of time and time. Instead, it is easy to forget about sterilization and chemical treatment of the part close to the oral cavity insertion part, such as the handgrip part,
There was a problem that the original effects of preventing infection and performing hygiene treatment could not be achieved.

The present invention has been made in view of the above circumstances, and provides a dental laser handpiece that can reliably perform infection prevention and hygiene treatment without requiring troublesome and complicated work, and is particularly suitable for root canal treatment. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, a dental laser handpiece according to the present invention comprises a light guide fiber connected to a laser generator, and a handgrip containing at least the light guide fiber, A fiber guide pipe extended from the handgrip to be fitted onto a light guide fiber portion protruding toward the tip side of the handgrip, and a light incident end surface facing the tip light exit end surface of the light guide fiber. And a contact probe attached to the tip of the guide pipe in a state in which the laser light incident from the light incident end face is emitted from the tip, and the guide pipe is configured to be attachable to and detachable from the handgrip. Is characterized by.

In the dental laser handpiece having the above structure, the contact probe may be detachably attached to the guide pipe.

Furthermore, if the guide pipe can be bent and the bent state can be maintained, it is easier to use.

(Operation) According to the present invention, the laser light generated by the laser generator is guided by the light guide fiber and is emitted from the light emitting end face of the tip thereof, and the emitted laser light is incident on the contact probe and the tip thereof is emitted. Released from the department. At this time, the practitioner grasps the handgrip, inserts the contact probe into the oral cavity of the subject, and operates to irradiate a predetermined portion with the laser light emitted from the tip of the probe. , Perform desired dental treatment. Then, when the treatment for one subject is completed, the guide pipe including the contact probe is detached from the handgrip and discarded,
A new guide pipe with a new contact probe is attached to the handgrip every time the patient changes, and the guide pipe and contact probe are replaced, so that there is no contamination at all. The contact probe and the guide pipe can be used to perform hygienic dental treatment without fear of infection. This is because saliva that is spattered during treatment by replacing the guide pipe after each treatment, particularly when performing deep-insertion probe treatment in the oral cavity, such as root canal treatment. Even if a part of the same or the like adheres to the guide pipe, it does not affect the next subject at all.

Also, depending on the treatment content, there is no risk of the guide pipe being contaminated at all.In such a case, by removing only the contact probe from the guide pipe and replacing it with a new one, No worries about infection,
Moreover, the processing cost for hygienic dental treatment can be reduced as much as possible.

Furthermore, by constructing the guide pipe so that it can be bent and the bending state can be maintained, it is easy to perform various kinds of treatments on the anterior teeth, molars or the backs of teeth in a narrow oral cavity, and accurate treatments can be performed efficiently. .

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall external side view showing an example of a laser handpiece for dentistry, particularly root canal treatment according to the present invention, FIG. 2 is an enlarged semi-longitudinal side view of line II in FIG. 1, and FIG. Figure 1
It is an expanded vertical side view of a III line part.

In FIG. 1, reference numeral 1 denotes a light guide fiber which is connected to a laser generator (not shown) and which guides parallel laser light from the laser generator by condensing and guiding the laser light at a fixed angle optically. A fiber protection tube 3 made of a flexible tube made of synthetic resin or synthetic rubber, which is inserted through the metal protection tube 3, and a metal protection tube connected to the tip of the fiber protection tube 2 in the middle of the tip of the light guide fiber 1. Reference numeral 4 denotes a handgrip which is fitted over the metal protection tube 3 by tightening and tightly integrated, and 5 is externally fitted to the light guide fiber portion 1A projecting to the tip of the metal protection tube 3 and the handgrip 4, and a base thereof. The end is the above metal protection tube 3
A fiber guide pipe connected to the tip of the guide pipe. The guide pipe 5 is a plastically deformable material such as a synthetic resin or an annealed copper pipe, or a flexible pipe made of various metals. Is configured to be able to be held, and the distal end portion thereof can be arbitrarily bent according to the content of treatment and the like (in the figure, a state of being bent at about 90 degrees is illustrated). Reference numeral 6 denotes a synthetic resin taper type contact probe fixedly integrated with the tip of the guide pipe 5 by crimping.

FIG. 2 shows the detailed structure of the metal protection tube 3 and the handgrip 4, in which FIG. 7 shows the protection tube 2
Is a cover nut for connecting the tip of the metal protection tube 3 to the base end of the metal protection tube 3.
By being screwed into the female threaded portion 3a formed on the inner peripheral surface of the base end portion, the connecting tubular member 8 internally fitted and fixed to the distal end portion of the protection tube 2 is pressed through the distal end large diameter tubular portion 8a,
The end surface is brought into contact with the stepped portion 3b formed on the inner surface of the metal protection tube 3 for positioning, and the protection tube 2 is fixedly connected to the metal protection tube 3. An annular space between the light guide fiber 1 and the protective tube 2, an annular space between the light guide fiber 1 and the connecting tube member 8 and the light guide fiber 1
The annular space between the metal protection tube 3 and the metal protection tube 3 is formed in a series of continuous cooling air passages 9. In order to prevent the cooling air flowing in the passages 9 in the direction of arrow X from leaking, the connecting cylinder member 8 is connected. A seal ring 10 that is in close contact with the inner peripheral surface of the metal protection tube 3 is fitted to the large-diameter portion 8a of the tip.

Further, in FIG. 2, reference numeral 11 denotes a connecting pipe of the guide pipe 5 screwed and connected to the female screw portion 3c formed at the front end of the metal protection pipe 3, and the outer surface of the front end of the connecting pipe 11 is a tapered surface. 11a, a plurality of slits 11b are formed in the circumferential direction in the distal end tube portion having the tapered surface 11a. 12 is the connecting cylinder 11
Is a cover nut that can be screwed and coupled via a female screw portion 12b, and the inner surface of the cover nut 12 is formed into a tapered surface 12a corresponding to the tapered surface 11a of the connecting cylinder 11. Accordingly, with the base end portion of the guide pipe 5 being inserted into the connecting cylinder 11, the cover nut 12 is tightened and screwed into the connecting cylinder 11,
The slit 11b forming cylinder portion of the connecting cylinder 11 is provided with a tapered surface 1
By the action of 1a and 12a, the guide pipe 5 is elastically deformed in the centripetal direction to tighten the guide pipe 5 to the connecting cylinder 11 and the handgrip 4, and the cover nut 12 is loosened so that the tightening can be released. In other words, the guide pipe 5 and the contact probe 6 crimped and fixed to the tip thereof are configured to be attachable to and detachable from the handgrip 4.

Further, 13 is a grip sleeve, a tightening cover nut 14 is screwed on the tip of an intermediate connecting cylinder body 16 screwed to the grip sleeve, and an elastic cylinder body 15 is fitted inside the cover nut 14, so that Due to the elastic deformation of the elastic tubular body 15 in the centripetal direction accompanying the tightening of the cover nut 14, the metal protective tube 3 is pressed from the outside so that the metal protective tube 3 is fastened to the intermediate connecting tubular body 16. I am doing it. That is, the protruding width of the metal protection tube 3 with respect to the handgrip 4 can be adjusted. Reference numeral 17 is a cover nut screwed to the base end of the grip sleeve 13 so as to keep the metal protection tube 3 concentric. In addition, the sleeve 1 in which the milling cut portion 18a is formed on the base end portion of the connecting cylinder 11
8 is fitted, and the sleeve 18 holds the light guide fiber 1 fixedly to the metal protection tube 3 and
The milling cut portion 18a connects the cooling air passage 9 to the cooling air passage 9A inside the connecting cylinder 11.

FIG. 3 shows the detailed structure of the guide pipe 5 and the contact probe 6, and in FIG. 3, 19 is a sleeve fitted to the tip of the light guide fiber portion 1A, the outer peripheral surface of which is clearly shown in FIG. Such a milling cut part 19a
Has been cut. By externally fitting the vicinity of the tip end portion of the guide pipe 5 to the sleeve 19, the light guide fiber portion 1A is fixedly held concentrically with respect to the guide pipe 5 and is fitted in the sleeve 19. The coating 1a at the tip of the light guiding fiber portion 1A is cut off to expose the core and the glad portion 1b, and the light emitting end face 1c is caulked and fixed to the tip of the guide pipe 5 and the contact probe 6 is inserted. It faces the light end face 6a. Reference numeral 20 denotes an air discharge hole formed in a portion of the guide pipe 5 between the light exit end face 1c of the light guide fiber portion 1A and the light entrance end face 6a of the contact probe 6, and between the guide pipe 5 and the light guide fiber portion 1A. The cooling air flowing through the cooling air passage 9B formed by the annular space and the milling cut portion 19a is discharged to the outside.

The contact probe 6 may be selected so that it can be plastically deformed, and is bent at an appropriate angle at the tip end together with the guide pipe 5 (in the figure, it is bent at about 90 degrees. (Shown), the laser beam having the maximum divergence angle incident from the light incident end face 6a is reflected in the probe 6 as shown by the one-dot chain line, and emitted from the tip 6A exceeding the critical angle. ing.

In the laser handpiece for root canal treatment configured as described above, the guide pipe 5 by the connecting tube 11 is loosened by loosening the cover nut 12 every time the root canal treatment for one subject is completed. , And then in this state, guide pipe 5 and contact probe 6
Is pulled out to the front side, as shown in FIG. 5, the light guide fiber portion 1A in which the sleeve 19 is externally fitted to the light emitting end.
Is removed from the connecting tube 11 in a form of being pulled out from the inside of the guide pipe 5. Thereafter, a new guide pipe 5 and contact probe 6 are attached, and predetermined root canal treatment is performed on the next subject, whereby infection prevention and hygiene treatment can be realized. In addition, at the time of root canal treatment, the passage 9 → the milling cut portion 18a → the passage 9A → the passage 9B → the milling cut portion 19a → the discharge hole 20.
Cooling air is flowed in this order, and the light guide fibers 1, 1
A is cooled to suppress the thermal adverse effect.

FIG. 6 is a modification of the above-described embodiment, in which the guide pipe 5 is formed in a straight tube shape, and the contact probe 6 fixedly integrated with the distal end of the guide pipe 5 by caulking is approximately 90 in the vicinity of the proximal end portion thereof. Since the other components are the same as those in FIGS. 3 and 4, the same reference numerals are given and description thereof is omitted. Further, as the handgrip 4 in this case, the same one as shown in FIG. 2 is used.

FIGS. 7 and 8 show another embodiment of the dental laser handpiece according to the present invention, and FIG. 7 is an enlarged semi-longitudinal side view of the II line portion of FIG. 1, replacing FIG. FIG. 8 is an enlarged semi-longitudinal side view of the III line portion of FIG. 1 and replaces FIG.

In FIG. 7, reference numeral 21 is a tightening cover nut threadedly connected to an internal threaded portion 3c formed at the tip of the metal protection tube 3 penetrating into the handgrip 4. The base end portion is internally fitted and fixed, and the sleeve 18 in which the milling cut portion 18a is cut is fitted. Since the other parts are the same as those in FIG. 2, the corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 8, 22 is a cover nut screwed to the male screw portion 5a formed at the tip of the guide pipe 5,
A taper surface 22a having a smaller diameter toward the tip is provided at one end of the opening.
Are formed. Reference numeral 23 denotes a C-shaped tightening ring installed in a portion of the cover nut 22 corresponding to the tapered surface 22a. By tightening the cover nut 22 with the contact probe 6 inserted in the tip portion of the guide pipe 5, , The ring 23 is reduced in diameter by the action of the tapered surface 22a as shown in FIG.
Is fixedly connected to the guide pipe 5 in a retaining state. Since the other parts are the same as those in FIG. 3, the corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

The dental laser handpiece configured as shown in FIG. 7 to FIG. 9 described above is used when dental treatment for one subject, particularly oral treatment such as transpiration (incision) and coagulation (hemostasis), is completed. By loosening the cover nut 22,
Only the contact probe 6 can be replaced, and infection prevention and sanitary treatment can be economically realized.

FIG. 10 shows a modification of the above embodiment, which is a contact probe 6
8 and 9 is formed in the cover nut 22 while the light scattering portion 24 is formed by applying a clouding process or the like to the tip end of the cover nut 22.
In place of the C-shaped tightening ring 23 shown in the figure, a cylindrical elastic body 25 is interposed, and by tightening the cover nut 22, the cylindrical elastic body 25 is elastically deformed in the centripetal direction to make contact. The contact probe 6 is suitable for coagulation (hemostasis) and the like because the probe 6 can be fixedly held in a disengaged state. Since the other configurations are the same as those in FIG. 8, the same reference numerals are given. The description is omitted.

FIG. 10 is an enlarged side view of the essential part showing another embodiment of the dental laser handpiece according to the present invention, in which the guide pipe 5 is made of a bellows-shaped flexible metal pipe and is bendable. In addition, it is possible to maintain the bent state. In this case, by bending the guide pipe 5 arbitrarily and maintaining the bent state for use,
In a narrow oral cavity, it is easy to perform treatment especially on a portion that is difficult to be irradiated with laser, and it is possible to improve the treatment efficiency by preventing irradiation of unnecessary portions with laser. In the embodiment of FIG. 11, the probe 6 may be fixedly integrated with the tip of the guide pipe 5 or may be detachable and replaceable by using the cover nut 22.

In each of the above embodiments, the most advanced contact probe 6 is shown bent at about 90 degrees with respect to the handgrip 4, but it may be connected in a straight line.

Further, the laser generator may be built in the handgrip 4.

(Effects of the Invention) As described above, according to the present invention, the guide pipe that extends over a considerably long range from the handgrip including the contact probe each time the treatment for one subject is completed is provided. , Sterilization, chemical treatment, cutting of light guiding fiber, removal of coating and glad part, etc. can be easily replaced with a new one to prevent infection of various pathogens and to carry out hygiene treatment without requiring troublesome and complicated work. You can definitely achieve it. Especially in the case of root canal treatment with a large insertion length in the oral cavity, not only the probe but also the guide pipe can be replaced so that the labor such as sterilization up to the hand grip can be saved, so reliable infection prevention While maintaining the effect, there is an effect that the treatment can be facilitated and the efficiency can be achieved.

Also, in the case of treatment such as evaporation or coagulation where the range of contamination due to scattering of saliva etc. is narrow, it is possible to replace only the contact probe at the tip to reduce the consumption cost required for infection prevention and hygiene treatment as much as possible. You can

Furthermore, by constructing the guide pipe 5 so that it can be bent by plastic deformation or structural deformation so that the bent state can be maintained, various treatments can be easily performed in a narrow oral cavity, and efficient treatments can be performed.

[Brief description of drawings]

FIG. 1 is a side view of an overall appearance showing an example of a dental laser handpiece according to the present invention, FIG. 2 is an enlarged semi-longitudinal side view of a II line portion of FIG. 1, and FIG. 3 is a III line of FIG. FIG. 4 is an enlarged cross-sectional side view of the section, FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is a partially cut-away vertical side view showing the guide pipe pulled out, and FIG. An enlarged vertical side view showing the modified structure of FIG. 3, FIGS. 7 and 8 show another embodiment, and FIG. 7 is an enlarged semi-longitudinal side view corresponding to the II line portion of FIG. 1 is an enlarged vertical sectional side view corresponding to the III line portion in FIG. 1, FIG. 9 is an enlarged sectional view taken along line IV-IV in FIG. 8, and FIG. 10 is an enlarged vertical sectional view showing a modified structure of FIG. Side view, first
FIG. 1 is an enlarged side view of an essential part showing another embodiment of the present invention. (Explanation of symbols) 1, 1A ... light guide fiber, 4 ... hand grip,
5 ... Guide pipe, 6 ... Contact probe,
9, 9A, 9B ... Cooling air passage, 19 ... Sleeve.

Claims (5)

[Scope of utility model registration request] 1. A light guide fiber connected to a laser generator, a handgrip containing at least the light guide fiber, and a light guide fiber portion projecting to the tip side of the handgrip so as to be externally fitted and extended from the handgrip. A fiber guide pipe is provided, and has a light incident end face that opposes the light exit end face of the tip of the light guide fiber, and at the tip of the guide pipe in a state in which the laser light incident from the light incident end face is emitted from the tip portion. A dental laser handpiece, comprising: a contact probe attached to the guide pipe, wherein the guide pipe is configured to be attachable to and detachable from a hand grip. 2. The dental laser handpiece according to claim 1, wherein the contact probe is detachably attached to the guide pipe. 3. The dental laser handpiece according to claim 1, wherein an annular space between the guide pipe and a light guide fiber portion fitted therein is formed as a cooling air passage. 4. A dental laser hand according to claim 1, wherein a sleeve for holding the guide pipe concentrically with the guide pipe is attached to the tip of the light guide fiber portion fitted in the guide pipe. piece 5. The dentistry according to claim 1, wherein the guide pipe is made of a plastically deformable or structurally deformable material, and the guide pipe is bendable and capable of maintaining a bent state. Laser handpiece for.