JPH0751287A - Laser medical treatment device - Google Patents

Abstract

PURPOSE:To improve the curing effect by preventing the accumulation of the water in a cavity formed by the irradiation of the erbium YAG laser beam, supressing the acceleration of deterioration of the tip of a probe, and preventing the attachment of residue and the carbonization by the transpiration of water. CONSTITUTION:In a laser medical treatment device 11 provided with an erbium YAG laser beam source, a hand piece 1 to direct the laser beam to a diseased part, and a fiber for beam leading to lead the laser beam injected from the laser beam source to the hand piece 1, a means to feed a mixture fluid of a gas and a liquid to the diseased part where the laser beam is irradiated, in the atmized condition, is equipped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser treatment apparatus which can be preferably used for dental treatment such as transpiration of teeth in the oral cavity and incision of gingiva.

[0002]

2. Description of the Related Art In recent years, erbium-yag laser handpieces have been used to perform transpiration, incision, coagulation and hemostasis, etc. of hard tissues such as teeth in the oral cavity and biological soft tissues such as gingiva. As a light irradiation site or a therapeutic purpose, a laser handpiece configured to spray water as a spray fluid toward the laser light irradiation site in order to improve the evaporation effect of the laser light irradiation site is well known. Such a laser handpiece is disclosed, for example, in Japanese Patent Application No. 4-223868. In this prior art,
It is configured to spray water from between the fiber for irradiating the handpiece with laser light and its protective tube so that water adheres to the surface of hard tissue such as teeth to allow efficient evaporation of hard tissue. ing.

[0003]

In such a prior art, when a tooth is irradiated with laser light to form a cavity, for example, water injected from the water supply pipe is accumulated in the cavity and irradiated with laser light. Every time it is done, the water will be scattered around. In addition, since the tip of the probe is immersed in the water accumulated in the cavity, the fiber forming the tip of the probe is damaged due to the influence of water cavitation and the durability is reduced. . Moreover, since water is accumulated in the cavity, the operator cannot easily and surely see the laser light irradiation site, which is a problem of inconvenience. Further, when only air is jetted toward the laser light irradiation site, since the tooth enamel has many inorganic components, the residue from which the OH group has been evaporated remains unreacted,
Transpiration is hindered. Further, since dentin has a large amount of organic components, there is a problem that when the number of repeated pulses is increased to, for example, about 10 pulses / sec, partial carbonization occurs.

Therefore, an object of the present invention is to provide a laser treatment capable of preventing a residue generated by evaporation from remaining on a laser light irradiation site, suppressing a temperature rise, and preventing water from accumulating at the irradiation site. It is to provide a device.

[0005]

The present invention is directed to an erbium
In a laser treatment device including a yag laser light source, a handpiece that directs laser light to the affected area, and a light guide fiber that guides the laser light emitted from the laser light source to the handpiece, the affected area to which the laser light is irradiated A laser treatment apparatus comprising means for supplying a mixed fluid of gas and liquid in a spray state.

[0006]

According to the present invention, the erbium-yag laser light is highly absorbed by water, but a relatively thick layer of water is formed in the affected area by supplying a mixed fluid of gas and liquid in a spray state. Is being prevented. As a result, the erbium-Yag laser light can be efficiently supplied to the affected area without impairing the cooling effect. Further, as compared with the case where only water is supplied, the occurrence of submersion can be prevented, so that the visibility is clear.

[0007]

1 is a partial sectional view showing a laser handpiece 1 of a laser treatment apparatus according to an embodiment of the present invention.
FIG. 2 is a front view showing the entire laser handpiece 1 shown in FIG. 1. For example, a laser handpiece 1 used for performing dental treatment in the oral cavity includes a handpiece body 4 to which a light guide fiber 3 for guiding laser light is connected.
The laser light emitted from the emission end 5 of the light guiding fiber 3 is guided in the handpiece body 4, and the laser light is irradiated from the tip 6 to the laser light irradiation site.
A grip 8 provided on the handpiece body 4 so as to be rotatable around its axis, and fixed to the grip 8.
The handpiece main body 4 has first and second conduits 9 and 10 that are coated along the outer periphery and extend substantially parallel to each other.

Further, in the laser treatment apparatus main body 11, a laser beam generating source 13, a drying air supply means 14, an injection water supply means 15 for supplying injection water which is an injection fluid,
An injection air supply unit 16 for supplying injection air as an injection fluid. Further, the laser light source 13 is
An r: YAG (erbium yag) laser beam is a laser oscillator that oscillates the laser beam with a pulse width of 150 to 300 μsec and a period of 1 to 30 pps.
The irradiation intensity can be adjusted within the range of 1 J / pulse at the maximum. Er: YA entering from such a laser light source 13
Since G laser light is generated, a fluoride fiber is used as the light guiding fiber 3 because it has a high transmittance for Er: YAG laser light. This fluoride fiber
Since the moisture resistance is low, the drying air is guided from the drying air supply means 14 through the conduit 17 into the cooling chamber 18 where the emission end 5 is exposed, and the light guiding fiber 3, particularly the emission end 5 is wet. It can be prevented.

The drying air supplied to the cooling chamber 18 is discharged laterally from the discharge hole 20 through the flow path 19. The vicinity of the emitting end 5 of the light guiding fiber 3 is inserted and held in the ferrule 21, and the ferrule 21 is held on the central axis of the handpiece body 4. An external screw 24 is engraved on the tip portion 23 of the handpiece body 4, and the external screw 2
4 is a cover nut 2 in which an inner screw 25 is engraved on the inner peripheral surface.
6 is screwed on. Tip portion 23 of the handpiece body 4
Is formed with a truncated cone-shaped guide surface 27 that is inclined toward the base side (left side in FIG. 1) toward the inner side in the radial direction. Further, on the inner peripheral surface of the cover nut 26, a guide surface 28 is formed which is inclined toward the tip end side (rightward in FIG. 1) toward the inner side in the radial direction.

An annular pressing ring 29 is mounted between the guide surfaces 27 and 28, and the pressing ring 29 is guided by the guide surface 28 by tightening the cover nut 26.
And is guided radially inward by the guide surface 27 of the tip portion 23 while being pressed to the left of the cover nut 2
It is guided radially inward by a guide surface 28 of 6. As a result, the inner peripheral surface of the pressing ring 29 is pressed against the outer peripheral surface of the distal end portion 23 of the handpiece body 4 and comes into contact with a large frictional force, and the pressing ring 29 and the guide surfaces 27 and 28 are also a large frictional force. They come into contact and thus the grip 8 is prevented from rotating. In addition, each of the conduits 9 and 10 has a grip 8
On the other hand, since it is held slidably in the longitudinal direction, the distance L1 between the tip portions 30 and 31 of the conduits 9 and 10 and the tip portion of the probe can be adjusted.

With such a configuration, each of the pipelines 9 and 10
With the tip portions 30 and 31 of the probe 7 facing the tip portion of the probe 7, the grip 8 and the pipe lines 9 and 10 can be positioned at desired positions in the circumferential direction with respect to the axis of the handpiece body 4. With the distal end portion 6 of the device in contact with the affected part, the respective conduits 9 and 10 can be arranged at positions where they do not interfere, and the operator can easily and reliably visually recognize the laser light irradiation site from the outside. First and second pipelines 9, 10
The tip portions 30 and 31 of the probe 7 are retracted from the tip portion 6 of the probe 7 by a predetermined first distance L1 = 7 to 10 mm, and the outer skin 9 ′ of each of the conduits 9 and 10 is arranged at the tip portion 3 of the probe 7.
A predetermined second distance L2 = 1 to 3 mm is peeled from 0,31. The tip 31 of the second conduit 10 may be retracted from the tip 30 of the first conduit 9 by the distance L2.

Further, as shown in the enlarged view of FIG. 3, the respective tip portions 30 and 31 of the first and second pipelines 9 and 10 are arranged in parallel with each other and are jetted from the first pipeline 9. The water or the aqueous solution can be atomized by the air or the inert gas jetted from the second conduit 10 and jetted toward the vicinity of the tip 6 of the probe 7. Such an injection fluid is
In cavity formation, water is 2 when it is a mixture of water and air.
It has been confirmed by the inventor of the present invention that a spray state in which air is mixed at 5 liters / minute with respect to cc / minute is optimal. In addition, in removing amalgam fillings, it is necessary to increase the amount of water for cooling. Optimally, water is 5 cc / min and air is 7 liters / min. In dental treatment such as cavity formation and removal of amalgam fillings. A good mixing ratio is 0.5-10 cc / min for water and 0.5-15 liters / for air.
Minutes.

As shown in FIG. 4, when the cavity 34 is formed in the tooth 33 by atomizing the mixture of water and air in such a mixing ratio and spraying it on the affected area, the cavity 34 is formed.
A thin water layer 35 can be formed on the surface of the. In this way, by mixing a small amount of water with a large amount of air and spraying it onto the laser light irradiation site, the water does not accumulate in the cavity 34, and a thin water layer 35 is formed, and the tip portion 6 of the probe 7 becomes water. Deterioration due to the adherence of OH groups is prevented, and when the laser light irradiation site is enamel, there are many inorganic components, so there is no possibility that the residue from which the OH groups have been evaporated remains unreacted and remains in the cavity 34. Therefore, there is no possibility that the progress of transpiration due to the irradiation of the laser light is hindered, and carbonization due to repeated pulses of dentin can be prevented as compared with the case where only air is jetted.

Referring again to FIG. 1, a probe holder 36 for holding the probe 7 is detachably attached to the tip portion 23 of the handpiece body 4. The probe holder 36 is received by a coupling 38 screwed to an external screw 37 formed on the tip 23 of the handpiece body 4. The base end portion of the probe 7 is inserted into the probe holder 36, the outer cover 39 and the clad 40 are peeled off, and the core 41 is exposed toward the emitting end 5. A spherical lens 44 is interposed between the entrance end 43 of the core 41 and the exit end 5 of the fiber 3 for guiding light.
The laser light emitted from the laser beam can be focused on the incident end 43 and guided into the probe 7. Regarding the probe 7, Japanese Patent Application No. 4-33, which has already been proposed by the applicant of the present application,
Various probes such as those disclosed in 5651 may be used.

The probe 7 includes the light guiding fiber 3
Since it is shorter than the above, it is not always necessary to use the fluoride fiber, and although the transmission efficiency of the laser light is inferior to the fluoride fiber, the moisture resistance is higher and the mechanical strength is superior to the fluoride fiber. An optical fiber can be appropriately selected and used. Further, the light guiding fiber 3 is not limited to the fluoride fiber, but glass fibers such as chalcogenite glass fiber and dehydrated silica glass fiber, or crystal fibers such as sapphire fiber and zinc selenium fiber may be used. Good.

FIG. 5 is a system diagram showing the overall configuration of a dental laser treatment apparatus 100 according to another embodiment of the present invention. The dental laser treatment apparatus 100 of this embodiment basically includes a main body 102 and a flexible cable 10 extending from the main body 102.
3 and a laser handpiece 104 to which the cable 103 is connected. The laser handpiece 104 is detachably and rotatably connected to the handpiece body 105 and the inner cylinder 117 at the tip of the handpiece body,
An outer cylinder body 107 having a bent hard tissue probe 106 attached to a distal end thereof, and the probe 1 of the outer cylinder body 107.
Hard tissue such as teeth in the oral cavity can be irradiated with laser light from 06, and the tissue at the laser light irradiation site can be evaporated and incised.

The reason why the emitting end 151 needs to be kept in a dry state in this way is as follows. Ie E
In order to guide the r: YAG laser light to the probe 106 while reducing the attenuation as much as possible, it is necessary to use a fluoride fiber, and such a fluoride fiber deteriorates due to the adhesion of moisture. This is to prevent Moreover, when the probe 106 is replaced with a contact probe for soft tissue as described later, or when the laser output is measured by using the laser output measuring device, the above-mentioned outer cylinder body must be detached. This is because it is necessary to prevent the light guide fiber 113, in particular, the emitting end 151 of the light guide fiber 113 from getting wet due to adhesion of water and increase in temperature with the outer cylindrical body 107 separated.

The main body 102 has a laser light source 108 for generating a laser light and a drying air supply means 109.
And a jetting air supply means 110 for supplying jetting air jetted near the laser light irradiation portion, and a jetting water supply means 111 for supplying jetting water jetted near the laser light irradiation portion. Including and

The laser light generated from the laser light source 108 is an Er: YAG (erbium yag) laser having a wavelength of 2.94 μm, which is extremely high for living tissues containing OH groups. Has absorption rate,
It is preferably used for transpiration of hard tissues such as teeth, formation of cutting cavities, root canal treatment and etching before filling, and hemostasis and incision of soft tissues. Such laser light is guided to the handpiece body 105 through the light guiding fiber 113.

The light-guiding fiber 113 is made of a fluoride fiber in order to prevent the transmittance from decreasing and deteriorating due to moisture absorption, and covers the core, the clad surrounding the core, and the outer peripheral surface of the clad. And a protective jacket, which is made of UV acrylic resin. The core and the clad may be made of glass fiber such as chalcogenite glass fiber and dehydrated silica glass fiber, or crystal fiber such as sapphire fiber and zinc selenium fiber, in addition to fluoride fiber. .

The drying air supplied from the drying air supply means 109 is guided to the handpiece body 105 through the pipe 114, and the air supplied from the jetting air supply means 110 flows through the pipe 115. The water that is guided to the handpiece body 105 via the water and is further supplied from the water supply means 111 for jetting water through the pipe line 116.
Guided to 5. The flexible cable 103 is configured by the light guiding fiber 113 and the conduits 114, 115 and 116.

The handpiece body 105 has an inner cylinder 117 screwed in an airtight state in the vicinity of its tip,
The outer cylindrical body 107 is engaged with the inner cylindrical body 117 by the locking means 11.
It is detachably locked by 8. The locking means 118 is
A spring receiving sleeve 120 screwed to a joint 119 to which the inner cylindrical body 117 is screwed, a sliding sleeve 121 coaxially inserted to the spring receiving sleeve 120, a spring receiving sleeve 120 and a sliding sleeve 121. The compression coil spring 123 interposed therebetween and the inward projection 1 of the sliding sleeve 121 elastically pressed by the compression coil spring 123.
24 has a spherical engagement piece 125 that is elastically pressed inward in the radial direction and that is provided in plural at intervals in the circumferential direction. Each engagement piece 125 can be elastically fitted into the engagement groove 126 formed in the outer tubular body 107 to prevent the outer tubular body 107 from being pulled out.

Inside the inner cylinder 117 and the joint 119, the drying air supply means 109 and the injection air supply means 11 are provided.
0 and the water supply means 111 for injection to the respective pipelines 114, 1
Passages 127, 128, 12 through which drying air, jetting air and jetting water supplied via 15, 116 pass.
9 is formed, and the vicinity of the tip end of the light guiding fiber 113 that guides the laser light generated from the laser light generation source 108 is inserted into the center and inserted into the ferrule 130. The ferrule 130 is inserted into the inner cylindrical body 117. Tip 13 of
1 is provided so as to partially project into a recess 133 formed in the vicinity of 1, and is held by a positioning cylinder 134 mounted in the inner cylinder 117 near the recess 133 and coaxially with the inner cylinder 117. Positioned. A screw 135 that can move forward and backward in the radial direction is screwed to the positioning cylinder 134, and the truncated cone-shaped tip of the screw 135 is fitted into the V groove of the ferrule 130 to prevent the ferrule 130 from coming off.

FIG. 6 shows the laser handpiece 10 shown in FIG.
4 is an enlarged cross-sectional view near the outer cylinder body 107 of FIG.
FIG. 7 is a cross-sectional view taken along section line VII-VII of FIG. The outer tubular body 107 includes an outer tubular body 136 that is externally inserted into the inner tubular body 117, a retaining cover 138 that is screwed to a tip portion 137 of the outer tubular body 136, and the tip portion 131 of the inner tubular body 117.
The probe 106 includes a holding member 139 that is threadedly attached to the probe 106 and holds the base end portion of the probe 106 in an airtight state, and the probe 106. The holding member 139 is a tip portion 1 of the inner cylindrical body 117.
A first nut 144 having an outer screw 143 screwed into the inner screw 141 of 31 and the first nut 144,
The joint 146 integrally formed with the flange 145 and the second nut 147 screwed to the joint 146.

At one axial end of the first nut 144,
A recess 148 is formed, and the end surface 149 surrounding the recess 148 is formed by the end surface 150 of the positioning cylinder 134.
Is pressed. From the end surface 150 of the positioning cylinder 134, the ferrule 130 and the light guiding fiber 113 are inserted.
And the emitting end 151 of the
0 forms a cooling chamber 153. This cooling room 1
A central hole 154 is formed on the central axis of the first nut 144 in the 53, and the spherical lens 1 is formed in the central hole 154.
The third nut 156 to which 55 is fitted is screwed. Third
A through hole 157 is formed in the nut 156, and the spherical lens 1
55 is opposed to the emitting end 151 of the light guiding fiber 113 protruding into the cooling chamber 153 through the through hole 157. Front of the spherical lens 155 (right of FIGS. 6 and 7)
The joint 146 is mounted in the space 158 with a space 158 therebetween.

Passages 159 and 160 formed in the first nut 144 communicate with the space 158, the air for injection is supplied to the space 158, and the first nut 144 and the joint 146 are connected through the passages 159 and 160. Space 1 formed between
61 and a passage 163 formed in the joint 146, and is guided to a screw hole 164 into which the second nut 147 of the joint 146 is screwed, and a diameter hole of a sleeve 165 into which the proximal end portion of the probe 106 is inserted. After passing through 166, it is supplied into the coaxially formed annular passage 169 formed between the fiber 167 of the probe 106 and the protective tube 168 surrounding the fiber 167, and the fiber 1 is supplied from the opening 170.
It is jetted toward the tip of 67.

The annular passage 169 also has an annular space 17 through a radial hole 171 formed in the sleeve 165.
3 is supplied with water for injection, and the annular space 173 is provided with a joint 1
Water for injection is supplied through a passage 174 formed in 46, an annular space 175 formed between the joint 146 and the first nut 144, and a passage 176 formed in the first nut 144. At the end of the fiber 167 mounted on the sleeve 165, the clad 177 is peeled off to expose the core 178, and the end surface 179 faces the spherical lens 155. The end surface 179 is perpendicular to the optical axis, and the laser light focused by the spherical lens 155 can be incident on the end surface 179 without scattering.

An O-ring 18 is provided between the third nut 156 and the inner peripheral surface of the central hole 154 of the first nut 144.
0 is interposed and the airtightness of the cooling chamber 153 is achieved.
This prevents moisture from adhering to the end surface of the light guide fiber 113 exposed in the cooling chamber 153.

In the probe 106, the fiber 1
The tip portion of 67 is a length L from the protection tube 168 in the axial direction.
It is exposed over 1, and the length L1 is selected to be, for example, 3 to 5 mm. Therefore, the opening 170 is
The fiber 167 is formed at a position retracted from the end surface 181 of the tip end portion of the fiber 167 by a length L1, and air and water are mixed in the form of mist at the above-mentioned ratio and jetted toward the affected area.

In this way, since a thin layer of water is formed on the surface of hard tissues such as tooth enamel and dentin,
Compared to jetting of water alone, the affected part may be submerged and the visibility may be deteriorated, water splashing can be prevented, and hard tissues such as teeth can be efficiently evaporated. Probe 1
The energy of the laser beam at the tip of 06 is selected to be, for example, 100 to 300 mJ / pulse or less.

The fiber 167 used for such a probe 106 is an Er: YAG laser beam which oscillates at a wavelength of 2.94 μm in this embodiment, and therefore, when the fluoride fiber is used, the diameter of the core 78 is 430 μm. Yes,
The diameter of the clad 177 may be selected to be 450 μm. Further, instead of the fluoride fiber, the same material as the light guiding fiber 113, that is, glass fiber such as chalcogenite glass fiber, dehydrated silica glass fiber, or crystal fiber such as sapphire fiber and zinc selenium fiber may be used. it can.

FIG. 8 is a section line VIII-VIII of FIG.
FIG. 9 is a vertical cross-sectional view as seen from FIG.
It is a side view which shows the external appearance of 04. The probe holder 107 having the above-described configuration is used as the handpiece body 105.
Is detachably attached to the handpiece body 105, and the three conduits 114, 115 and 116 and the drying air discharge conduit 18 centering on the above-described light guiding fiber 113 are installed in the handpiece body 105.
3 and 3 are arranged at intervals in the circumferential direction. Discharge line 1
The air guided to 83 opens the check valve 184 (see FIG. 5) and is discharged to the outside through the flexible tube 185 and the discharge hole 186. Further, each of the conduits 114, 115 and 116 and the light guiding fiber 113 is connected to the single cable 1 via the socket 186 provided at the end of the handpiece body 105.
03, and is connected to the main body 102 via a mutually removable connector 187 as shown in FIG.

When a treatment is performed using the dental laser treatment apparatus 100 having the above-mentioned configuration, the laser light emitted from the tip of the probe 106 has a beam diameter close to the diameter of the tip. In addition, the irradiation end surface 181 can be inserted into the deep space of the tooth, and a small-diameter cavity can be accurately formed by operating the handpiece.
Further, since the opening 170 is formed toward the vicinity of the tip of the probe 106 and the mixed fluid of water and air can be sprayed toward the irradiation site from this opening, the water layer on the irradiation site surface becomes thin, It is possible to improve the absorption efficiency of the laser beam to the irradiation site. Further, especially when the enamel is irradiated in the tooth structure, there is no risk that the calcium-concentrated layer remaining on the enamel surface after the hydration shell containing the OH group has evaporated will cause a decrease in the transpiration during re-irradiation. Moreover, by intermittently irradiating the laser light in a pulsed manner, the cavitation is disturbed, the adhered residue is removed, and a high enamel evaporation effect can be achieved.

Moreover, the outer cylinder 107 is replaced with the inner cylinder 117.
When the spherical lens 155 is detached from the inner cylindrical body 1
Since it is arranged so as to be retracted inward in the axial direction of the inner cylindrical body 117 (left side in FIGS. 5 to 7) with respect to the end surface 188 of 17, the outer cylindrical body 107 is detached from the inner cylindrical body 117 in order to be replaced. Even in this state, the spherical lens 155 can be prevented from being damaged. Further, even when the outer cylinder body 107 is separated from the inner cylinder body 117, the cooling chamber 153 is hermetically sealed as described above, and the cooling air is ventilated into the cooling chamber 153. Adhesion of water to the emission end 151 of the optical fiber 113 can be reliably prevented.

As another embodiment of the present invention, the jetting fluid is not limited to water, but may be an aqueous solution or a saline solution mixed with a disinfecting solution. The jetting fluid is not limited to air, but an inert gas such as nitrogen may be used.

Further, as another embodiment of the present invention, the pipe lines are not limited to the first and second pipe lines, and the third and fourth pipe lines are arranged in parallel so that different kinds of fluids can be individually supplied. It may be pressure-fed, or if it is a single line, it may be pressure-fed with a fluid in which the water for injection and air are premixed.

[0037]

As described above, according to the present invention, erbium-yag laser light is highly absorbed in water, but by supplying a mixed fluid of gas and liquid in a spray state, the water is relatively thick in the affected area. It prevents the formation of layers.
As a result, the erbium-Yag laser light can be efficiently supplied to the affected area without impairing the cooling effect. Also,
Compared with the case where only water is supplied, it is possible to prevent the occurrence of submersion in water, and the visibility is clear.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a laser handpiece 1 of a laser treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a front view showing the overall appearance of the laser handpiece 1 shown in FIG.

3 is an enlarged cross-sectional view taken along the section line III-III in FIG.

FIG. 4 is a diagram for explaining the situation when the cavity 34 is formed in the tooth 33 using the laser handpiece 1.

FIG. 5 is a dental laser treatment apparatus 1 according to another embodiment of the present invention.
It is a systematic diagram which shows the whole structure of 00.

6 is an enlarged cross-sectional view of the laser handpiece 104 shown in FIG. 5 near an outer cylinder.

FIG. 7 is a sectional view taken along section line VII-VII in FIG.

8 is a vertical cross-sectional view taken along the section line VIII-VIII in FIG.

9 is a side view showing the external appearance of the laser handpiece 104. FIG.

FIG. 10 is a perspective view showing the external appearance of a dental laser treatment apparatus 100.

[Explanation of symbols]

 1,104 Laser Handpiece 3,113 Light Guide Fiber 4,105 Handpiece Body 5,151 Emitting End 6 Tip of Probe 7 7,106 Probe 8 Grip 9 First Pipeline 10 Second Pipeline 11 Laser Treatment Device Main body 13,108 Laser light generation source 14,109 Drying air supply means 15,111 Spraying water supply means 16,110 Spraying air supply means 26 Cover nut 29 Pressing ring 30 Tip part of first pipeline 9 31 Second pipe Tip part of passage 10 33 Teeth 34 Cavity 35 Water layer

Front page continuation (72) Masaki Odaka, 680 Higashihamanancho, Fushimi-ku, Kyoto, Kyoto Prefecture Morita Manufacturing Co., Ltd. (72) Sadahiro Nakajima 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Hoya shares In-house (72) Inventor Akihiro Kawahara 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Hoya Co., Ltd.

Claims (1)

[Claims] 1. A laser treatment apparatus comprising an erbium-yag laser light source, a handpiece for directing laser light to an affected area, and a light guide fiber for guiding the laser light emitted from the laser light source to the handpiece. A laser treatment apparatus comprising means for supplying a mixed fluid of a gas and a liquid in a sprayed state to an affected area irradiated with light.