JP6181535B2 - Laser handpiece and laser treatment apparatus - Google Patents

Description

  The present invention relates to a laser treatment apparatus that performs treatment by irradiating an affected area with laser light, and in particular, performs dental treatment such as incision, cutting, coagulation, hemostasis, and removal of filler in the oral cavity by irradiating the affected area with laser light. The present invention relates to a laser handpiece and a laser treatment apparatus that can be performed.

  Conventionally, a dental laser treatment apparatus equipped with a laser handpiece has been used to irradiate a diseased part of a living tissue with laser light to perform treatment such as transpiration, incision, coagulation, and hemostasis of the affected tissue. . In particular, a laser treatment apparatus provided with a laser handpiece is used to perform procedures such as tooth transpiration in the oral cavity, removal of filling materials, and transpiration of biological soft tissues such as gums, incision, coagulation, and hemostasis.

  Such a laser treatment apparatus guides laser light generated from a laser source to a laser handpiece through a light guide fiber of a laser transmission path, and an irradiation laser chip (laser irradiation) provided on the laser handpiece. Irradiating the affected part from the part), the treatment as described above can be performed.

  For example, in Patent Document 1, an outer cylinder sleeve that can be detachably attached to the inner cylinder body at the tip of the handpiece is provided, and different types of laser chips for irradiation such as for hard tissue or soft tissue are appropriately selected and attached. There has been proposed a laser handpiece that can be freely mounted and configured to eject a jet fluid toward a laser irradiation site.

  Alternatively, Patent Document 2 is provided with an outer cylinder sleeve inscribed in a bending means and a converging means for refracting the optical axis of the laser beam so as to be detachably attached to the inner cylinder body at the tip of the handpiece, and further for hard tissue or soft tissue A laser handpiece is proposed in which a laser chip for irradiation selected appropriately among a plurality of laser chips for irradiation of different types can be detachably mounted and the jet fluid is jetted toward the laser irradiation site. ing.

  However, in the conventional laser treatment apparatus as described above, it has been difficult to provide an inexpensive laser handpiece that can efficiently treat the entire oral region having a narrow and complicated shape.

Specifically, the treatment with the handpiece disclosed in Patent Document 1 has a problem that it is difficult to perform satisfactory treatment for the treatment of the molar teeth or the front side of the anterior tongue.
In other words, in order to enable treatment of the entire oral cavity region having a narrow and complicated shape, for example, a bending type laser chip for irradiation that can be brought into contact with the tooth surface vertically is required. In order to stably transmit the generated energy, for example, an irradiation laser chip using a thick optical fiber having a diameter of about 600 μm is required.

  On the other hand, in order to ensure safety such as mechanical strength with such a thick optical fiber, a bending radius of, for example, 20 mm or more is necessary, and the length of the optical fiber increases and the energy loss of laser light increases. The problem of doing will also occur.

  As a result, it was difficult to treat the molar or anterior lingual part in the narrow oral cavity with the bending type laser chip having a large bending radius and high energy loss.

  On the other hand, in Patent Document 2, an outer cylinder sleeve having a bending means is provided, and an appropriately selected irradiation laser chip is detachably attached, and a laser hand is ejected toward a laser irradiation site. A piece is configured, and by attaching a short and straight type laser chip for irradiation to this laser handpiece, sufficient space for treatment in a narrow oral cavity can be secured and sufficient for treatment It is said that satisfactory treatment can be performed on a molar tooth or an anterior lingual side portion supplied with a laser beam having a sufficient energy. However, in the treatment of other regions, treatment using the handpiece disclosed in Patent Document 1 is desired because it is excellent in ensuring the visual sense of the treatment site.

  Therefore, in order to efficiently treat the entire oral cavity region, for example, when treating the molar teeth or the front part of the anterior tongue, the handpiece as proposed in Patent Document 2 is used. In the treatment of this, it is preferable to treat using the handpiece proposed in Patent Document 1.

  However, the replacement of the handpiece for performing the treatment as described above increases the treatment time, increases the patient burden, and requires multiple types of laser handpieces. Despite being able to provide a complete treatment, it has not been implemented.

JP-A-7-051286 JP 7-155335 A

  An object of the present invention is to provide a handpiece and a laser treatment apparatus capable of efficiently performing treatment on the entire oral cavity region having a narrow and complex shape in view of the conventional problems as described above.

The present invention is a laser handpiece that irradiates a laser beam guided through a laser transmission path from a laser irradiation unit disposed at a tip of a handpiece housing, the handpiece housing, the laser irradiation unit, A relay member disposed between the handpiece housing and the laser irradiation unit and configured to be connectable to the handpiece housing, and the laser transmission path is connected to the handpiece housing And a main body light guide path for guiding the laser light guided from the laser transmission path, and a connection permission section for allowing connection of the relay member, and connected to the connection permission section to the relay member. state the main light path and the laser irradiation portion and is optically connected with the said laser of the laser light guided by the body guide path Includes a relay light guide for relaying the light to the morphism portion, said connection allowance portion, in a state of detaching the relay member, characterized by being configured to allow direct connection of the laser irradiation unit.

According to the present invention, it is possible to efficiently treat the entire oral region having a narrow and complicated shape.
Specifically, the hand is composed of the handpiece housing, the laser irradiation unit, and a relay member that is arranged between the handpiece housing and the laser irradiation unit and configured to be connectable to the handpiece housing. The laser transmission path is connected to the handpiece housing of the piece, and a main body light guide path that guides the laser light guided from the laser transmission path, and a connection permission portion that allows connection of the relay member And the relay member is optically connected to the main body light guide path and the laser irradiation section in a state of being connected to the connection permission section, and the laser light guided by the main body light guide path By providing a relay light guide for relaying the light guide to the laser irradiation unit, for example, a plurality of types of laser irradiation units with shapes and mechanisms according to the treatment, By attaching to the relay member connected to the connection permitting part in the handpiece housing, the main body light guide built in the handpiece housing and the laser irradiation part are optically connected by the relay light guide provided in the relay member. An efficient treatment can be performed using a plurality of types of laser irradiation units having a shape and a mechanism corresponding to the treatment without replacing the handpiece housing.

Further, the connection permission portion is configured to allow direct connection of the laser irradiation unit with the relay member removed, so that the relay member is connected and the laser irradiation unit is mounted or relayed. By removing the member and attaching the laser irradiation unit directly to the handpiece housing, the laser irradiation unit can be attached in various manners depending on the treatment to perform efficient treatment.

As an aspect of the present invention, a plurality of relay members having different shapes can be provided, and the handpiece housing can be configured to be replaceable.
According to the present invention, not only the laser irradiation unit but also, for example, a plurality of types of relay members having shapes and mechanisms corresponding to the treatment can be replaced, so that more efficient treatment can be performed.

As an aspect of the present invention, at least one of the main body light guide path and the relay light guide path can be constituted by a hollow waveguide.
According to the present invention, a handpiece that does not reduce the transmission efficiency of the laser light to be guided and does not damage the bending operation is configured. For example, the main body light guide or the relay light guide according to treatment It is possible to perform a more efficient and highly practicable treatment, such as curving.

As an aspect of the present invention, the laser beam can be composed of an Er: YAG laser, an Er: YSGG laser, or a carbon dioxide gas laser.
According to the present invention, for example, Er: YAG laser having a wavelength suitable for transpiration of hard tissues such as teeth, formation of cut cavities, periodontal treatment, root canal treatment, etching before filling, and hemostasis or incision of soft tissues. A laser beam corresponding to the treatment can be used.

An aspect of the present invention includes a laser generation source that generates the laser light, a laser control unit that controls generation of the laser light in the laser generation source, and the laser transmission path. It is a laser treatment apparatus in which a piece is connected to the laser transmission path.
According to the present invention, as described above, efficient treatment can be performed.

  According to the present invention, it is possible to provide a handpiece and a laser treatment apparatus capable of efficiently performing treatment on the entire oral cavity region having a narrow and complicated shape.

The external appearance perspective view of a laser treatment apparatus. Schematic explanatory drawing about a laser treatment apparatus. Explanatory drawing of a handpiece. Explanatory drawing of a hollow waveguide. Explanatory drawing of a handpiece. Explanatory drawing of a handpiece. Explanatory drawing of a handpiece. Explanatory drawing of a handpiece.

This embodiment of the present invention will be described below with reference to the drawings.
1 shows an external perspective view of the laser treatment apparatus 1, FIG. 2 shows a schematic explanatory view of the laser treatment apparatus 1, FIGS. 3 and 5 to 8 show explanatory views of the laser handpiece 4, and FIG. An explanatory view of the hollow waveguide 5 is shown.

  2 shows a schematic block diagram of the laser treatment apparatus 1 using a cross-sectional view of the laser hand piece 4, FIG. 3 (a) shows a front view of the laser hand piece 4, and FIG. 3 (b) shows a laser. An exploded sectional view of the handpiece 4 is shown. 1 to 4 show the laser handpiece 4 to which the probe type laser irradiation unit 10 is attached.

  5A shows a cross-sectional view of the laser handpiece 4 in which the probe type laser irradiation unit 10 is directly attached to the handpiece housing 42, and FIG. 5B shows the case where the straight probe type laser irradiation unit 10a is attached. An exploded sectional view of the laser handpiece 4 is shown, and FIG. 5C shows an exploded sectional view of the laser handpiece 4 in which the straight probe type laser irradiation unit 10a is directly attached to the handpiece housing 42, and FIG. Shows an exploded cross-sectional view of the laser handpiece 4 in which the straight probe type laser irradiation unit 10a is mounted on the handpiece housing 42 via the extension relay member 50a.

  FIG. 6A shows an exploded cross-sectional view of the laser handpiece 4 in which the probe type laser irradiation unit 10 is attached to the handpiece housing 42 via the bending relay member 50b, and FIG. 6B shows the bending relay member 50b. 2 is an exploded cross-sectional view of the laser handpiece 4 in which the straight probe type laser irradiation unit 10a is mounted on the handpiece housing 42 via the.

  FIG. 7A is a front view of the laser handpiece 4 to which the contra laser irradiation unit 10b is mounted, and FIG. 7B is an exploded sectional view of the laser hand piece 4 to which the contra laser irradiation unit 10b is mounted. FIG. 7C shows an exploded cross-sectional view of the laser handpiece 4 on which the contra laser irradiation unit 10b is mounted.

  8A shows an exploded cross-sectional view of the laser handpiece 4 in which the contra-type laser irradiation unit 10b is directly attached to the handpiece housing 42, and FIG. 8B shows the contra-type laser irradiation via the relay member 50. FIG. 8C is an exploded cross-sectional view of the laser handpiece 4 that attaches the portion 10c to the handpiece housing 42, and FIG. 8C shows a laser hand that attaches the contra-type laser irradiation portion 10b to the handpiece housing 42 via the bending relay member 50b. An exploded sectional view of the piece 4 is shown.

  As shown in FIGS. 1 and 2, the laser treatment apparatus 1 of the present embodiment includes an apparatus main body 2, a laser transmission path 3 connected to the apparatus main body 2, and a laser handpiece 4 connected to one end of the laser transmission path 3. It consists of and.

  As shown in FIG. 2, the apparatus body 2 includes a gas supply source 21 for supplying a gas such as air or an inert gas, a laser generation source 22 for generating laser light, and a liquid such as water or physiological saline. And a control unit 20 for controlling the gas supply source 21, the laser generation source 22, and the liquid supply source 23 based on an instruction operation by a foot controller 24 or an operation button 26 described later. In addition, a foot controller 24 for operation is connected to the bottom side surface, and an operation button 26 is disposed on the upper surface side. Furthermore, the upper surface of the apparatus main body 2 is connected to a gas supply source 21, a laser generation source 22, and a liquid supply source 23 disposed inside, and a connection connector 34 disposed on the base end side of the laser transmission path 3. A connection connector 25 that allows connection is provided.

  In the present embodiment, the laser source 22 has an extremely high absorption rate with respect to a living tissue containing an OH group, and transpiration of hard tissues such as teeth, cutting cavity formation, periodontal treatment, root canal treatment and before filling. It can be suitably used for performing etching, soft tissue hemostasis, incision, etc., for example, adjustment of laser irradiation with an oscillation amplitude of 50 μsec to 1000 μsec, a repetition rate of 1 Hz to 50 Hz, and a maximum energy of 1 J / pulse is possible. An Er: YAG (erbium yag) laser that oscillates at a wavelength of 2.94 μm is oscillated.

  The gas supplied from the gas supply source 21, the laser light emitted from the laser generation source 22, and the liquid supplied from the liquid supply source 23 are configured to be supplied to the laser handpiece 4 through the laser transmission path 3. ing.

  The laser transmission path 3 includes a gas feed pipe 31 that is a flow path for feeding gas, an optical transmission body 32 that is configured by an optical fiber, and a liquid feed pipe 33 that is a flow path that supplies liquid. Yes. Here, as the optical transmission body 32, any solid fiber or hollow fiber can be adopted as long as it has a transmission efficiency suitable for the laser beam to be transmitted.

  The end of the gas supply pipe 31 on the apparatus main body 2 side is connected to the gas supply source 21, and the internal gas supply pipe 31 a, which is the opposite end, is inserted and connected in the laser handpiece 4. Similarly, the end of the optical transmission body 32 on the apparatus main body 2 side is connected to the laser generation source 22, and the internal optical transmission body 32 a which is the opposite end is inserted and connected in the laser handpiece 4. The end of the liquid supply pipe 33 on the apparatus main body 2 side is connected to the liquid supply source 23, and the internal liquid supply pipe 33 a that is the opposite end is inserted and connected in the laser handpiece 4.

The laser handpiece 4 includes a handpiece main body 41 held by a practitioner and a probe-type laser irradiation unit 10 that is detachably attached to a distal end portion of the handpiece main body 41.
The handpiece body 41 has a hollow cylindrical handpiece housing 42 and a cylindrical relay member 50 arranged in this order from the rear (right side in FIG. 2) to the front (left side in FIG. 2) of the handpiece. Is configured.

  The handpiece housing 42 has a hollow cylindrical shape in a sleeping position with a rear end having a bottom, and a screwing attachment portion 42a that allows attachment by screwing of a screwing portion 57 formed at the rear end of the relay member 50 at the front end. It is the structure which has. The internal gas supply pipe 31a described above is connected to the gas flow path 55 disposed in the relay member 50 through the connection pipe 55a inside the handpiece housing 42. Similarly, the internal liquid supply pipe 33a is connected to the liquid flow path 56 disposed in the relay member 50 through the connection pipe 56a inside the handpiece housing 42. Further, the internal optical transmission body 32 a is connected to a ferrule 51 disposed on the relay member 50 inside the handpiece housing 42.

  A relay member 50 mounted on the front side (left side in FIG. 2) of the handpiece housing 42 incorporates a ferrule 51 disposed along the axis L, and a gas channel 55 and a liquid channel 56 disposed on the outer side thereof. ing. Further, the rear end of the relay member 50 has a threaded portion 57 that is threadedly engaged with the threaded mounting portion 42a of the handpiece housing 42, and the front end is threadedly engaged with a mounting portion 11 of the probe type laser irradiation unit 10 described later. It has the screwing mounting part 58 which permits mounting | wearing by the screwing of the part 11a.

In the ferrule 51, an internal optical transmission body 32a is connected to the rear end portion, and a lens holder 52 in which a lens 53 and a relay light guide path 54 are disposed is mounted inside.
The lens 53 includes a proximal lens 53a disposed on the apparatus main body 2 side of the relay light guide 54 and a distal lens 53b disposed on the probe laser irradiation unit 10 side of the relay light guide 54, and an internal optical transmission body. The proximal side lens 53a facing the 32a condenses the laser light from the optical transmission body 32, transmits it to the relay light guide 54, and is disposed on the probe type laser irradiation unit 10 side of the relay light guide 54. The lens 53 b is configured to guide the laser beam transmitted through the relay light guide 54 to the probe type laser irradiation unit 10.

In addition, the relay light guide 54 and the internal optical transmission body 32a are comprised with the hollow waveguide 6 shown in FIG.
The hollow waveguide 6 includes a glass fiber tube 60 serving as a base material, an inner protective film 61, a silver thin film 62, and a dielectric thin film disposed in order from the radially outer side toward the radially inner side on the inner surface of the glass fiber tube 60. 63 and an outer surface coating layer 64 that covers the outer surface of the glass fiber tube 60. And the conduction | electrical_connection space 6a is comprised in the hollow inside.

The glass fiber tube 60 is composed of a glass capillary made of a hollow glass fiber having an appropriate thickness.
The inner protective film 61 formed on the inner surface of the glass fiber tube 60 is a siloxane cured thin film (inorganic thin film) composed of a room temperature moisture curable special inorganic paint having high lubricity, adhesion to glass, and high water resistance.

More specifically, the inner protective film 61 is a mixture of a liquid main agent composed of silicon dioxide (SiO2) and a liquid curing agent, and has high hardness after curing at room temperature, heat resistance, weather resistance, chemical resistance, It is a thin film with excellent wear resistance and contamination resistance. In addition, it has solvent resistance to organic solvents such as methyl ethyl ketone, ethanol, ether, benzine and unleaded gasoline.
The silver thin film 62 is a silver thin film formed by silver mirror reaction using a silver solution obtained by adding ammonia to a silver nitrate aqueous solution.

The dielectric thin film 63 is an appropriate organic material that efficiently transmits laser light by reflection or refraction, and is formed of a transparent cyclic olefin polymer composed of cyclohexane and a cycloolefin polymer resin.
The outer surface coating layer 64 covers the outer surface of the glass fiber tube 60 with the above-mentioned cyclic olefin polymer.

  As shown by the dotted line in FIG. 4, an outer protective film 65 is provided on the outer side of the outer surface coating layer 64 made of cycloolefin and cycloolefin polymer resin, which is provided on the outer surface of the glass fiber tube 60. Also good. By providing the outer protective film 65, the durability against the bending operation can be further improved.

  Specifically, an outer surface coating layer 64 made of a cycloolefin polymer composed of cyclohexane and cycloolefin polymer resin is provided on the outer surface of the glass fiber tube 60, and room temperature moisture having high adhesion and water resistance is provided on the outer side of the outer surface coating layer 64. By providing the outer protective film 65 made of a curable special inorganic paint, an external force acts on the outer surface of the glass fiber tube 60 to prevent the occurrence of minute defects on the outer surface of the glass fiber tube 60, and to bend Improves durability against operation.

  The gas flow path 55 connected to the internal gas supply pipe 31a and the liquid flow path 56 connected to the internal liquid supply pipe 33a are arranged up to the front of the relay member 50 and connected to the probe type laser irradiation unit 10. Yes. With this configuration, the gas supplied from the gas supply source 21 is supplied to the probe type laser irradiation unit 10 through the gas supply pipe 31 and the gas flow path 55, and the liquid supplied from the liquid supply source 23 is a liquid It is fed to the probe type laser irradiation unit 10 through the feed pipe 33 and the liquid flow path 56.

Next, the probe type laser irradiation unit 10 will be described.
The probe-type laser irradiation unit 10 includes a mounting part 11 having a screwing part 11a that is screwed into a screwing mounting part 58 of the relay member 50, and a chip body 12 (see FIG. 2).

The chip body 12 is disposed along the light guide path 13 disposed along the axis L, the protective pipe 14 covering the light guide path 13, the hollow first pipe 15 disposed outside the light guide path 13, and the outside thereof. A hollow second pipe 16 is used.
The chip body 12 includes a curved portion 12 a covered with the protective pipe 14 and a straight portion 12 b where the light guide path 13 is exposed from the protective pipe 14.

  The light guide path 13 is made of a single quartz optical fiber continuous from the rear end (right end in FIG. 5) of the mounting portion 11 to the tip of the chip body 12 and is exposed from the mounting portion 11 to the handpiece housing 42 side. The end on the side is an incident end 13a (see FIG. 2). Further, the end portion on the tip side opposite to the handpiece housing 42 side is set as the emitting tip portion 13b. The material of the optical fiber is not limited to quartz, and sapphire or the like can be used.

The light guide path 13 is a single-core optical fiber, and includes a fiber core part 131 formed of a core and a clad at the center, and a jacket 132 that covers the fiber core part 131.
The light guide path 13 in the straight portion 12b is exposed without being covered by the protective pipe 14.

  Further, the emission tip 13b at the tip of the light guide 13 exposed from the protective pipe 14 is formed in a truncated cone shape that is tapered downward in front of the axis L. More specifically, the emission tip portion 13b is composed of a circular tip surface 13ba that irradiates a laser beam toward the lower front side of the axis L, and an inclined side surface 13bb that irradiates the axis L with a laser beam in the radial direction. It is formed in a truncated cone shape.

  In addition, since the incident end portion 13a is disposed inside the relay member 50 so as to face the distal end side lens 53b, the laser beam emitted from the laser generation source 22 is emitted from the optical transmission body 32, the proximal end side. The light is incident from the incident end portion 13a through the lens 53a, the relay light guide path 54, and the front end side lens 53b, and can be irradiated from the output front end portion 13b through the light guide path 13.

  The first pipe 15 surrounds the light guide path 13 covered with the protective pipe 14 from the rear end 15a located inside the mounting portion 11 to the front end 15b where the front end 14a of the protective pipe 14 is partially exposed. It is provided to do.

  Further, the second pipe 16 surrounds the outside of the first pipe 15 from the rear end 16a located inside the mounting portion 11 to the front end 16b where the front end 15b of the first pipe 15 is partially exposed. Is provided. The protective pipe 14, the first pipe 15, and the second pipe 16 are made of stainless steel pipes.

  The light guide 13, the protective pipe 14 that covers the light guide 13, the first pipe 15 that surrounds the protective pipe 14, and the second pipe 16 that surrounds the first pipe 15 are concentric about the axis L. Is placed on top.

  Further, the clearance between the protective pipe 14 and the first pipe 15 constitutes the first flow path space 17, and the clearance between the first pipe 15 and the second pipe 16 defines the second flow path space 18. (Refer to the enlarged view of FIG. 3a).

  The first flow path space 17 is opened at the opening 17 a of the front end 15 b of the first pipe 15 and is connected to the liquid flow path 56 inside the relay member 50. Therefore, the liquid supplied from the liquid supply source 23 is ejected from the opening 17 a through the liquid supply pipe 33, the liquid flow path 56, and the first flow path space 17.

  Similarly, the second flow path space 18 is opened at the opening 18 a of the front end 16 b of the second pipe 16 and is connected to the gas flow path 55 inside the relay member 50. For this reason, the gas supplied from the gas supply source 21 is ejected from the opening 18 a through the gas supply pipe 31, the gas flow path 55, and the second flow path space 18.

  Since the probe type laser irradiation unit 10 is configured as described above, the laser treatment apparatus 1 is used for supplying the liquid via the first flow path space 17 and supplying the gas via the second flow path space 18. It can select suitably according to the treatment content, and supply of gas single, a liquid single, and the gas liquid mixture ejected in a fog state can be performed toward the irradiation area of the laser beam mentioned later.

  The laser treatment apparatus 1 configured as described above irradiates a tissue such as a tooth in the oral cavity with laser light from the emission tip portion 13b of the probe type laser irradiation unit 10 attached to the tip of the handpiece body 41, and thereby the laser. The tissue at the light irradiation site can be transpired and incised.

  In the laser treatment apparatus 1 configured as described above, as shown in FIG. 5A, the relay member 50 is removed, and the probe-type laser irradiation unit 10 is directly attached to the handpiece housing 42 by the chip body 12. be able to.

Further, as shown in FIG. 5B, a straight probe type laser irradiation unit 10a constituted by the chip body 12 having only the straight portion 12b may be mounted on the handpiece housing 42 via the relay member 50. The straight probe type laser irradiation unit 10a may be directly attached to the handpiece housing 42 (see FIG. 5C). Furthermore, as shown in FIG. 5D, the straight probe type laser irradiation unit 10a may be attached to the handpiece housing 42 via an extended relay member 50a that is long in the front-rear direction. Of course, although not shown, the probe-type laser irradiation unit 10 may be attached to the handpiece housing 42 via the extension relay member 50a.
Furthermore, as shown in FIG. 6, the probe-type laser irradiation unit 10 and the straight probe-type laser irradiation unit 10a may be attached to the handpiece housing 42 via a bent relay member 50b bent in a substantially mountain shape.

  Note that the extended relay member 50a is simply configured to be long in the front-rear direction with respect to the relay member 50, and the other configurations are the same as those of the relay member 50. The detailed explanation is omitted. Further, the bent relay member 50b is also configured to be bent in a substantially mountain shape with respect to the extended relay member 50a, and is the same configuration as the above-described extended relay member 50a. Detailed description is omitted.

  Furthermore, as shown in FIG. 7, instead of the probe-type laser irradiation unit 10 and the straight probe-type laser irradiation unit 10a in which the chip body 12 is exposed in front of the mounting unit 11, the handpiece body 41 is axially arranged, that is, You may use the contra laser irradiation part 10b which bent the irradiation direction of the laser beam 90 degree | times with respect to the front-back direction of the laser handpiece 4. FIG.

  The contra-type laser irradiation unit 10b has a shorter exposure length from the head 19 than the linear probe type laser irradiation unit 10a from which the linear portion 12b is exposed from the mounting unit 11, and the path of the light guide 13 in the head 19 is as follows. Since the other configuration is the same as the probe type laser irradiation unit 10 and the straight probe type laser irradiation unit 10a except that the reflection mirror 19a that bends the light guide direction of the laser light to be guided is provided, the same reference numerals are used. The detailed description is omitted.

  As shown in FIG. 7, the laser handpiece 4 may be configured by mounting the contra-type laser irradiation unit 10b having the head 19 thus configured on the handpiece housing 42 via the relay member 50, as shown in FIG. As shown in (a), the contra-type laser irradiation unit 10 b may be directly attached to the handpiece housing 42. Furthermore, the contra laser irradiation unit 10b may be mounted on the handpiece housing 42 via the bending relay member 50b (see FIG. 8C).

  In addition, the laser light guide direction of the head 19 by the reflection mirror 19a is not only bent by 90 degrees, but is also bent at an angle smaller than 90 degrees as shown in FIG. 8B. May be used.

  Of course, although not shown in the drawings, the laser handpiece 4 may be configured by directly mounting the contra-type laser irradiation unit 10c on the handpiece housing 42, and the contra-type laser irradiation unit 10c may be configured as the extension relay member 50a or the bending relay member 50b. The laser handpiece 4 may be configured by being attached to the handpiece housing 42 via the above. Of course, the laser handpiece 4 may be configured by mounting the contra-type laser irradiation unit 10b on the handpiece housing 42 via the extension relay member 50a.

  As described above, the probe type laser irradiation unit 10, the linear probe type laser irradiation unit 10a, and the contra type laser irradiation unit are connected to the handpiece housing 42 via the relay member 50, the extended relay member 50a, or the bent relay member 50b. Since the laser handpiece 4 can be configured by attaching the 10b or the contra type laser irradiation unit 10c to the handpiece housing 42, the probe type laser irradiation unit and the relay member are appropriately selected according to the purpose of treatment. Thus, efficient treatment can be performed.

That is, the probe type laser irradiation unit 10 (straight probe type laser irradiation unit 10a, contra type laser irradiation units 10b, 10c) in which the laser beam guided through the laser transmission path 3 is arranged at the tip of the handpiece housing 42 is used. In addition, the laser handpiece 4 to be irradiated or a laser generation source 22 that generates laser light, a control unit 20 that controls generation of laser light in the laser generation source 22, and the laser transmission path 3 are provided. In the laser treatment apparatus 1 in which the laser handpiece 4 is connected to the laser transmission path 3, the handpiece housing 42 and the probe type laser irradiation unit 10 (straight probe type laser irradiation unit 10a, contra type laser irradiation units 10b and 10c). And the handpiece housing 42 and the probe-type laser irradiation unit 10 (straight probe-type laser The relay member 50 (extended relay member 50a, bent relay member 50b) is disposed between the irradiation unit 10a and the contra-type laser irradiation units 10b and 10c) and configured to be connectable to the handpiece housing 42. The laser transmission path 3 is connected to the handpiece housing 42, and the internal optical transmission body 32a that guides the laser light guided from the laser transmission path 3 and the relay member 50 (extended relay member 50a, bent relay). A threaded mounting portion 42a that allows connection of the member 50b), and is connected to the relay member 50 (the extended relay member 50a and the bent relay member 50b) while being connected to the threaded mounting portion 42a. probe laser irradiation section 10 (straight probe laser irradiation unit 10a, contra laser irradiation unit 10b, 10c) and are optically connected, to the main light guide By providing the relay light guide 54 for relaying the light guided to the probe type laser irradiation unit 10 (straight probe type laser irradiation unit 10a, contra type laser irradiation units 10b, 10c) of the laser light guided in this manner. Therefore, it is possible to efficiently treat the entire oral region having a narrow and complicated shape.

  Specifically, with the above-described configuration, for example, a plurality of types of probe-type laser irradiation units 10 (straight probe-type laser irradiation unit 10a, contra-type laser irradiation units 10b, 10c) having a shape and a mechanism according to treatment are used as a handpiece The relay member (relay member 50, extended relay member 50a, bent relay member 50b) is mounted on the relay member (relay member 50, extended relay member 50a, bent relay member 50b) connected to the screw mounting portion 42a of the housing 42. The internal light transmission body 32a built in the handpiece housing 42 and the probe-type laser irradiation unit 10 (straight probe-type laser irradiation unit 10a, contra-type laser irradiation units 10b, 10c) are connected by the relay light guide 54 provided in Because it is optically connected, the shape and mechanism of the treatment can be changed without replacing the handpiece housing 42. Lobe laser irradiation unit 10, using the straight probe laser irradiation unit 10a, contra laser irradiation unit 10b, and 10c, it is possible to perform efficient treatment.

  Further, since the relay member (relay member 50, extended relay member 50a, bent relay member 50b) having a plurality of different shapes is provided and the handpiece housing 42 is configured to be replaceable, the probe type laser irradiation unit 10 (straight shape) In addition to the probe-type laser irradiation unit 10a and the contra-type laser irradiation units 10b and 10c), for example, a plurality of types of relay members (relay member 50, extension relay member 50a, bending relay member 50b) having shapes and mechanisms according to treatment. ) Can be exchanged, more efficient treatment can be performed.

  Further, since the internal optical transmission body 32a and the relay light guide path 54 are configured by the hollow waveguide 6, the handpiece that does not reduce the transmission efficiency of the laser light to be guided and does not damage the bending operation. For example, it is possible to perform a more efficient and highly practicable treatment such as bending the internal optical transmission body 32a and the relay light guide path 54 according to the treatment.

  Further, the probe-type laser irradiation unit 10 (straight probe-type laser irradiation unit 10a, contra-type laser irradiation unit) with the relay member 50 (extended relay member 50a, bent relay member 50b) removed from the screw mounting portion 42a. 10b, 10c) can be directly connected, so the relay member 50 (extension relay member 50a, bent relay member 50b) is connected, and the probe type laser irradiation unit 10 (straight probe type laser irradiation unit 10a) is connected. , The contra-type laser irradiation unit 10b, 10c) is mounted, or the relay member 50 (extended relay member 50a, bent relay member 50b) is removed and the probe type laser irradiation unit 10 (straight probe) is directly attached to the handpiece housing 42. Type laser irradiation unit 10a and contra type laser irradiation units 10b, 10c). Probe laser irradiation section 10 (straight probe laser irradiation unit 10a, contra laser irradiation unit 10b, 10c) and mounted, it is possible to perform efficient treatment with various aspects Te. The above explanation is an example of selection according to the treatment site and treatment, but according to the preference and familiarity of the user, the probe type laser irradiation unit 10 (straight probe type laser irradiation unit 10a, contra type laser irradiation unit) 10b, 10c) or the presence / absence and shape of the relay member 50 (extended relay member 50a, bent relay member 50b) can be selected.

  Further, by using an Er: YAG laser oscillated as a laser beam by the laser generation source 22, for example, transpiration of hard tissues such as teeth, cutting cavity formation, periodontal treatment, root canal treatment and etching before filling In addition, laser light corresponding to treatment such as hemostasis or incision of soft tissue can be used.

In correspondence between the configuration of the present invention and the above-described embodiment,
The laser irradiation unit of the present invention corresponds to the probe type laser irradiation unit 10, the linear probe type laser irradiation unit 10a, the contra type laser irradiation units 10b and 10c,
Similarly,
The relay members correspond to the relay member 50, the extended relay member 50a, and the bent relay member 50b.
The main body light guide corresponds to the internal optical transmission body 32a,
The connection permission portion corresponds to the screwing mounting portion 42a,
The laser control unit corresponds to the control unit 20,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the above description, an Er: YAG laser is used as a laser having an extremely high absorption rate for a living tissue containing an OH group in addition to the incision and transpiration of the living tissue. An Er: YSGG laser, a carbon dioxide laser, or the like can be used.

  Also, the light guide 13 can be used as long as it has a high transmittance in the wavelength band of the laser light to be used and is strong against laser damage. For example, a sapphire fiber or zinc is used for laser light having a wavelength of 2.94 um. Crystal fibers such as selenium fibers, chalcogenite fibers, germanium fibers, glass fibers such as dehydrated silica fibers, hollow waveguide fibers, and the like can also be used.

  Further, if the fiber is resistant to laser damage, the relay fiber 38 is a crystal fiber such as anhydrous silica fiber or zinc selenium fiber, a glass fiber such as chalcogenite fiber, germanium fiber, or fluoride fiber, or a hollow waveguide fiber. Can also be used.

DESCRIPTION OF SYMBOLS 1 ... Laser treatment apparatus 3 ... Laser transmission path 4 ... Laser handpiece 6 ... Hollow waveguide 10 ... Probe type laser irradiation part 10a ... Straight probe type laser irradiation part 10b, 10c ... Contra type laser irradiation part 20 ... Control part 22 ... Laser generation source 32a ... Internal optical transmission body 42 ... Handpiece housing 42a ... Screw mounting portion 50 ... Relay member 50a ... Extended relay member 50b ... Bend relay member 54 ... Relay light guide

Claims (5)

A laser handpiece that irradiates a laser beam guided through a laser transmission path from a laser irradiation unit disposed at a tip of a handpiece housing,
The handpiece housing;
The laser irradiation unit;
It is arranged between the handpiece housing and the laser irradiation unit, and is configured with a relay member configured to be connectable to the handpiece housing,
In the handpiece housing,
The laser transmission path is connected, and a main body light guide path for guiding the laser light guided from the laser transmission path,
A connection permission portion that allows connection of the relay member;
In the relay member,
The connection permission unit in the connected state is connected the with optically body light guide and the laser irradiation portion, relays the light to the laser irradiation portion of the laser light guided by the body guide path A relay light guide that
The laser handpiece , wherein the connection permission unit is configured to permit direct connection of the laser irradiation unit with the relay member removed . The laser handpiece according to claim 1, comprising a plurality of relay members having different shapes and configured to be replaceable with respect to the handpiece housing. At least one of the main body light guide and the relay light guide,
The laser handpiece according to claim 1 or 2, comprising a hollow waveguide. The laser handpiece according to any one of claims 1 to 3 , wherein the laser beam is an Er: YAG laser, an Er: YSGG laser, or a carbon dioxide gas laser. A laser generation source for generating the laser light;
A laser controller for controlling the generation of the laser beam in the laser source;
And comprising the laser transmission path,
Laser treatment apparatus connected to the laser handpiece according to the laser transmission channel to any one of claims 1 to 4.

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