JP6860896B2 - Dental treatment equipment - Google Patents

Description

The present invention relates to a dental treatment device and a cutting tool, and more particularly to a dental treatment device and a cutting tool capable of visually recognizing and treating an affected area.

Root canal treatment of teeth thoroughly removes the tooth substance and nerves infected with bacteria with a device called a reamer or file, and treats and prevents diseases of the root of the tooth (apical lesion).
However, in the root canal, because it does not directly visible, this root canal therapy, with many difficulties, in some cases, the reamer in root canal is broken during treatment, damaged portions root canal It may remain inside.

Since the remaining reamer may have an adverse effect on the human body, it is necessary to remove it, and the reamer is removed by scraping the tooth substance around the remaining reamer.
However, since the portion cannot be visually recognized even during removal, there are cases where adjacent healthy teeth are excessively cut or the remaining reamer is scraped.

For the problem that the affected area cannot be seen during treatment, a technique is known in which an endoscopic probe is externally attached to a handpiece for dental treatment such as an ultrasonic scaler, and an image of the treated area is transmitted to an endoscopic monitor. (See Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 2012-239726 Japanese Unexamined Patent Publication No. 2012-239727

The handpieces disclosed in Patent Documents 1 and 2 externally attach an endoscopic probe to a dental treatment handpiece, and are arranged in parallel with a cutting tool (chip) attached to the handpiece. In addition to the possibility of creating a blind spot in the viewing range, the cutting direction may be limited.
Also, due to the external attachment, the size of the cross section may be larger than the end of a normal cutting tool.
Therefore, when the handpieces disclosed in Patent Documents 1 and 2 are used, there is a possibility that an error may occur in the treatment position even though the handpiece is configured to be visible.

Therefore, in the techniques disclosed in Patent Documents 1 and 2, the dentin and gingiva may be damaged or a cutting range longer than necessary may be required, which may increase the burden on the treating patient. It was.

The present invention has been made in view of these circumstances, the cutting tool and the endoscope probe performs tooth treatment while viewing the cutting portion to match the viewing direction and therapeutic direction in the endoscopic probe It is an object of the present invention to provide a dental treatment apparatus equipped with a compact tooth treatment handpiece with reduced friction.

In order to solve the above problems, the invention of claim 1 is in a dental treatment apparatus provided with a tooth treatment handpiece having a rotating cylinder and inserting a cutting tool into the rotating cylinder to treat teeth. , The cutting tool is formed with a hollow portion penetrating in the rotation axis direction of the rotary cylinder, and the tooth treatment handpiece penetrates the side opposite to the side to which the cutting tool is inserted in the axial direction. An introduction hole that conducts to the hollow portion is perforated, and an endoscopic probe that is inserted from the introduction hole and has a view to the opening side of tooth treatment is disposed in the hollow portion and is internally provided in the hollow portion. A bearing is provided between the stationary endoscope probe and the inner wall of the cutting tool that is inserted into and rotates in the rotating cylinder .

The invention of claim 2 is the invention of claim 1, wherein the tooth treatment handpiece is characterized in that an electric or air turbine type with a micromotor.

The invention of claim 3 is the invention of claim 1 or claim 2, between the cutting tool and the endoscope probe is characterized in that the gap is provided.

The invention of claim 4 is the invention of any one of claims 1 to 3, wherein the cutting tool and the endoscope probe come into contact with each other via a bearing provided in the endoscope probe. It is characterized by.

A fifth aspect of the present invention, in any one invention of claims 1 to 4, the endoscope probe, characterized in Tei Rukoto a image guide and one or more light guides is there.

According to a sixth aspect of the invention, in any one invention of claims 1 to 5, the endoscope probe is characterized in Tei Rukoto comprises a conduit for discharging liquid to the opening side ..

According to the present invention, an endoscopic probe built in a hollow portion of a cutting tool enables dental treatment while visually recognizing the cut portion.
Further, since the endoscope probe does not come into contact with a rotating cutting tool and the endoscope probe does not rotate, the endoscope probe does not require a complicated mechanism.
In addition, bearings provided between the rotating cutting tool and the non-rotating endoscope probe allow easy positioning of the endoscope probe and friction between the cutting tool and the endoscope probe. Can be reduced .
Further, the cut portion image in the visible region can be acquired by changing the wavelength of the light transmitted through the light guide.
Further, a liquid discharge port for cleaning the cut portion can be provided.

Overall cross sectional view of a dental treatment apparatus according to an embodiment of the present invention. FIG. 5 is a cross-sectional view showing the configuration of an endoscopic probe. The figure for demonstrating the treatment example using the dental treatment apparatus which concerns on this invention . Sectional drawing of the main part of the cutting tool in this invention .

Hereinafter, preferred embodiments of the dental treatment apparatus and cutting tool of the present invention will be described with reference to the drawings.
In the following description, the structure also denoted by the same reference numerals in different drawings, as being similar, may be omitted from the description.

FIG. 1 is an overall external view for explaining an embodiment of the dental treatment device 1 according to the present invention.
In the present embodiment , the electric micromotor handpiece for dentistry will be described as an example, but the present invention can be similarly applied to the air turbine type handpiece.

Referring to FIG. 1, the dental treatment apparatus 1 according to the present embodiment includes a tooth treatment handpiece 10, a cutting tool 20 detachably attached to the tooth treatment handpiece 10, and a cutting tool 20. an endoscope device 30 for its integral endoscope probe 50 is accommodated, Ru Tei is configured from the liquid supply unit 40 for cleaning the treatment site.

Tooth treatment handpiece 10 includes a head portion 18, a lid member 19 which is engaged freely screwed detachably to the head portion 18, in the head portion 18, the sleeve 11 is disposed rotatably ..
By a motor or the like mounted on the handpiece body (not shown), the rotary shaft 12 is rotated.
The rotation of the rotating shaft 12 is transmitted to the sleeve 11 by the gears 13 and 14.
The rotating shaft 12 is rotatably supported by a ball bearing 15.
Sleeve 11 is also rotatably disposed by ball bearings 16 and 17.
The lid member 19 is formed with an introduction hole 36 penetrating from the head portion 18 side in the rotation center axis direction (vertical direction in the drawing) of the sleeve 11.

A cutting tool 20 such as a reamer or a file is freely inserted and removed from the sleeve 11 by a chuck mechanism (not shown).
The cutting tool 20 is rotated by the rotation of the rotating shaft 12, and can perform treatment such as enlargement of the root canal, for example.
The cutting tool 20 has a hollow portion 23 formed of an outer shell of a cylindrical portion to be inserted into the sleeve 11 and an outer shell of a conical portion from the cylindrical portion toward the treatment site. The hollow portion 23 is formed with an opening 25 facing the treatment side.

The endoscope apparatus 30 includes an integrated endoscopic probe 50 which is integrally and endoscopic probe 31 and the liquid supply tube 41 having an optical waveguide therein, among which the integrated endoscopic probe 50 is connected The endoscope main body device 34 and a probe support member 35 for positioning and arranging the integrated endoscope probe 50 so as not to come into contact with the inner wall of the sleeve 11.
The probe support member 35 is fixed to, for example, the lid member 19 of the tooth treatment handpiece 10.
The tip of the integrated endoscope probe 50 is housed in a hollow portion 23 formed in the cutting tool 20.

The probe support member 35 can be rigid to use tubing of high metal.
Further, the probe support member 35 is preferably secured in the introduction hole 36 so as not to cause around touching been induced rotation of the sleeve 11.
The fixing method is not particularly limited.
The accommodation position of the integrated endoscope probe 50 is preferably closer to the treatment site (lower side of the figure) of the hollow portion 23 in order to secure a wider field of view for imaging.

Figure 2 is a sectional view showing the configuration of an integrated endoscopic probe 50, referring to FIG. 2, the integrated endoscopic probe 50, an image guide 51 for image transmission, to illuminate the treatment site A plurality of light guides 52 are arranged.
These image guide 51, light guide 52 constitutes an optical waveguide in integrated endoscopic probe 50, is coupled with the endoscope main unit 34.
Further, the light guide 52 can pass light from a light emitting element that emits normal white light, blue light, or laser light having a specific wavelength, depending on the situation of imaging.

The liquid supply unit 40 sends the liquid from a liquid supply device or the like (not shown) to the hollow portion 23 of the cutting tool 20 through the liquid supply tube 41.
Liquid, washing water, cooling water may be well chemicals.
Liquid feed tube 41, like the endoscopic probe 31, an integrated endoscope is formed as a conduit of the probe 50, is inserted through the probe support 35, the tip of the discharge port 55 of the integrated endoscopic probe 50 It communicates with.

The liquid sent through the liquid supply tube 41 is discharged toward the opening 25 of the cutting tool 20 through the conduit and the discharge port 55 provided in the integrated endoscope probe 50.
With such a configuration , washing water, cooling water, a chemical solution, or the like can be discharged to the treatment unit.

Next, an example of treatment using the dental treatment device according to the present invention will be described with reference to FIG.
With reference to FIG. 3, the reamer 63 may be damaged when the root canal 61 of the dentin 60 is treated.
A part of the damaged reamer 63 is recessed in the gingiva 62, and in order to remove the damaged reamer 63, a cutting tool must be inserted into the portion to remove the reamer 63.
As shown in FIG. 3, the recessed portion of the reamer 63 is covered with the gingiva 62, and the affected portion can be visually recognized even if an endoscopic probe separate from the cutting tool or externally attached to the cutting tool is used. It's difficult.

In the dental treatment apparatus 1 according to the present embodiment, an opening 25 is formed so as to face the cutting portion to be removed, and the cutting portion is directly visually recognized by the integrated endoscope probe 50 through the opening 25. A dentin resection can be performed to remove the damaged reamer 63.
More specifically, when the damaged reamer 63 is buried in the dentin portion, the damaged reamer 63 is cut while visually recognizing the damaged reamer 63 so that the head portion of the damaged reamer 63 is located at the opening 25 of the cutting tool 20. Align with the tool 20 and cut the dentin around the damaged reamer 63 with the tip of the cutting tool 20 until the damaged reamer 63 is located in the hollow portion 23 of the cutting tool 20.
As a result, the head portion of the damaged reamer is exposed, so that the damaged reamer 63 can be removed by another treatment tool.

Further , at the time of cutting, cleaning water can be supplied through the discharge port 55, and the affected portion can be cleaned without deteriorating the visual state.

In addition to the normal illumination in the visible light region, a near-infrared laser beam of approximately 0.7 μm to 1.2 μm can be applied to the light guide 52.
Since the near-infrared laser light can penetrate the body by about 30 mm from the surface, the damaged reamer 63 hidden in the gingiva can be detected.
Further, after cleaning the treated area, sterilization can be performed by irradiating a high-power laser light or LED light having a wavelength of about 405 nm.

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Referring to FIG. 4, an integrated endoscopic probe 50 which is supported at one end of the probe support 35 which is inserted into the sleeve 11, between the inner wall of the cutting tool 20, the bearing 56 is disposed Tei To.
The bearing 56 reduces the friction between the rotating cutting tool 20 and the stationary integrated endoscope probe 50, and prevents them from coming into contact with each other.
Rolling bearings, sliding bearings, and the like can be used for the bearing 56.

Incidentally, embodiments of the present invention is not limited to the above embodiment can be applied similarly to the present invention in the air turbine handpiece, an ultrasonic handpiece, and the like.
Further, although the integrated endoscope probe having a conduit for liquid supply has been described as the endoscope probe, the endoscope probe may not have a conduit for liquid supply.

1 ... Dental treatment device, 10 ... Tooth treatment handpiece, 11 ... Sleeve, 12 ... Rotating shaft, 13, 14 ... Gear, 15, 16, 17 ... Ball bearing, 18 ... Head part, 19 ... Lid member, 20 ... Cutting tool, 23 ... Hollow part, 25 ... Opening, 30 ... Endoscopic device, 31 ... Endoscopic probe, 35 ... Probe support member, 36 ... Introduction hole, 40 ... Liquid supply part, 41 ... Supply cable, 50 ... integrated endoscopic probe, 51 ... image guide, 52 ... light guide, 55 ... discharge port, 56 ... bearing, 60 ... dentin, 61 ... root canal, 62 ... gingival, 63 ... reamer.

Claims (6)

In a dental treatment device having a rotating cylinder and equipped with a tooth treatment handpiece for inserting a cutting tool into the rotating cylinder to treat a tooth.
The cutting tool is formed with a hollow portion penetrating in the rotation axis direction of the rotary cylinder .
The tooth treatment handpiece is perforated with an introduction hole that penetrates the side opposite to the side where the cutting tool is inserted and is electrically connected to the hollow portion.
An endoscopic probe that is inserted through the introduction hole and has a field of view on the opening side of the tooth treatment is disposed in the hollow portion.
A bearing is provided between the endoscope probe that is housed in the hollow portion and is stationary and the inner wall of the cutting tool that is inserted into and rotates in the rotating cylinder. Dental treatment equipment. The dental treatment device according to claim 1, wherein the tooth treatment handpiece is an electric type or an air turbine type. Wherein between the cutting tool and the endoscope probe, dental treatment device according to claim 1 or claim 2, characterized in that the gap is provided. The dentistry according to any one of claims 1 to 3, wherein the cutting tool and the endoscope probe are in contact with each other via a bearing provided in the endoscope probe. Treatment device. The dental treatment apparatus according to any one of claims 1 to 4, wherein the endoscopic probe includes an image guide and one or more light guides. The dental treatment apparatus according to any one of claims 1 to 5, wherein the endoscopic probe includes a duct for discharging a liquid to the opening side.

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