JP2017023504A - Laser handpiece - Google Patents

Abstract

A laser handpiece including a fiber chip that can irradiate a treatment site with laser light with high transmission efficiency and good operability and can be disposable but can be used more frequently. provide. A laser handpiece having a detachable fiber chip 21 at the tip of a laser handpiece itself that emits laser light from a laser light source such as a semiconductor laser, and the fiber chip 21 is connected to a handpiece head at one end. A connector portion 22 made of a sterilizable material that is fixedly held at one end of an optical fiber 23 that is screwed together and receives laser light emitted from the handpiece head portion and guides it outward. A cannula made of a sterilizable material having a bent shape that is rotatably attached to the other end side of the optical fiber 23 in a state where the middle portion of the optical fiber 23 is penetrated and bends the other end side of the optical fiber 23 in a desired direction by a rotating operation. Part 41. [Selection] Figure 2

Description

  The present invention relates to a laser handpiece, and more specifically, it is possible to irradiate a treatment site with laser light with high transmission efficiency and good operability, and it is possible to increase the number of uses while being disposable. The present invention relates to a laser handpiece including a fiber chip having a simple configuration.

  In general, laser light emitted from a laser handpiece toward a treatment site is often used, for example, for incision of the gingiva that is the treatment site, oral sterilization, blood clots, and the like. As this type of laser handpiece, a fiber chip equipped with an optical fiber is attached to the tip of the laser handpiece itself, the laser light from the laser handpiece is guided by the optical fiber, and the laser light is directed from the tip toward the treatment site. Many are configured to irradiate.

  Patent Document 1 discloses a laser chip attachment / detachment tool for detachably screwing a laser chip into a laser light emission port of a laser probe that emits laser light, and the laser chip attachment / detachment tool is a cylindrical cover member. And at one end of the cylindrical cover member, there is a laser chip insertion port into which the laser light emitting needle of the laser chip can be inserted and the laser chip can be inserted in a non-rotatable manner. A laser chip attaching / detaching tool having an elastic member that holds the inserted laser beam emitting needle inside is disclosed (paragraphs [0002] to [0006]).

In the case of this patent document 1, since laser light is transmitted through a lens as disclosed in paragraphs [0001] and [FIG. 4], end face burnout due to contact bonding hardly occurs, but laser light is directed in a desired direction. It includes the problem of not being directed.
In addition, in the case of Patent Document 1, it is difficult to increase the axial accuracy of the laser beam and the laser chip, and the problem is that the transmission efficiency of the output decreases if the optical axes do not match. No solution has been taken.

  Patent Document 2 includes an optical fiber integrally having a connector connected to a laser light source at one end and a hand piece integrally formed at the other end, and a laser knife chip detachably connected to the hand piece. A laser probe configured to contact and join the light exit end face of the optical fiber on the handpiece side and the light entrance end face of the optical fiber on the laser knife chip side when the laser scalpel chip is attached to the handpiece. It is disclosed.

  In the case of the laser probe of Patent Document 2, the laser knife tip can be detachably sterilized by an autoclave or the like, but the light exit end face of the optical fiber on the handpiece side and the light incident end face of the optical fiber on the laser knife tip side are in contact with each other. When the laser knife tip is rotated to direct the laser beam in the desired direction, the fiber end faces are contact-coupled and the fiber end faces are damaged, resulting in a decrease in output transmission efficiency. .

JP 2009-254512 A JP-A-7-289560

  The problem to be solved by the present invention is that the treatment site can be irradiated with laser light from a laser light source with high transmission efficiency and good operability, and the number of uses can be increased while being disposable. In addition, there is no laser handpiece including a fiber chip with a simple configuration that can be used.

  The present invention is a laser handpiece having a detachable fiber chip at the tip of a handpiece that emits laser light, wherein the fiber chip is screwed and coupled to the handpiece at one end side. A connector part that fixes and holds one end of an optical fiber that receives emitted laser light and guides it outward, and is rotatably attached to the other end of the connector part with the middle part of the optical fiber passing therethrough. And a bent cannula part that bends the other end of the optical fiber in a desired direction by a rotation operation.

  According to the first aspect of the present invention, one end side of the fiber chip is screwed and joined to the handpiece, and one end side of the optical fiber that receives the laser beam emitted from the handpiece and guides it outward is fixed. A bent shape that is rotatably attached to the held connector portion and the other end side of the connector portion in a state where the middle portion of the optical fiber is penetrated, and bends the other end side of the optical fiber in a desired direction by a rotating operation. The cannula part of the optical fiber can be irradiated with a laser beam to a treatment part located at a desired part while bending the optical fiber without rotating by a simple rotation operation on the cannula part. A laser han equipped with a fiber chip with a simple configuration that is not rubbed and scratched and also has good laser light transmission efficiency. It is possible to provide a piece.

  According to the second aspect of the present invention, the same effects as the first aspect of the invention can be achieved, the connector portion and the cannula portion can be sterilized, and the optical fiber holding tube can be made of ceramic. Since it has a fitting structure with the receiving tube, the laser beam can be transmitted in a desired direction while improving the axial accuracy of the laser beam to increase the transmission efficiency of the laser beam, and can also be disposable. It is possible to provide a laser handpiece including a fiber chip that can be used more frequently.

  According to the invention of claim 3, in the invention of claim 1 or 2, the connector part is made of a polycarbonate material, and the cannula part is made of a polyetherimide material. In addition to the effects of the invention described in Item 2, it is possible to provide a laser handpiece including a fiber chip having a specification excellent in heat resistance and impact resistance and in consideration of biological safety.

FIG. 1 is a schematic perspective view showing a fiber chip in a laser handpiece according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the fiber chip in the laser handpiece according to the present embodiment. FIG. 3 is a schematic perspective view showing only the cannula portion of the fiber tip in the laser handpiece according to the present embodiment. FIG. 4 is a schematic explanatory view showing a state in which the cannula portion of the fiber tip in the laser handpiece according to the present embodiment is attached to the connector portion. FIG. 5 is a schematic perspective view showing the appearance of the movable claw body provided on the fiber tube mounting cylinder of the laser handpiece according to the present embodiment. FIG. 6 is a schematic sectional view showing a screwed state between the laser handpiece and the fiber chip according to the present embodiment. FIG. 7 is a schematic perspective view showing a state where the cannula portion of the fiber tip in the laser handpiece according to the present embodiment is rotated 180 degrees from the state shown in FIG.

  The present invention can irradiate a treatment site with laser light using, for example, a semiconductor laser, a YAG laser, a carbon dioxide laser as a laser light source with good transmission efficiency and good operability, and can be disposable. An object of the present invention is to provide a laser handpiece having a fiber chip with a simple configuration that can increase the number of times of use, and a laser handpiece having a fiber chip that is detachable at the tip of a handpiece that emits laser light. The fiber chip is screwed and coupled at one end to a handpiece light emitting connector receiving tube for emitting laser light provided on the handpiece, and at one end of a ceramic optical fiber holding tube for fixing and holding an optical fiber. Built in a structure that fits into a piece light emitting connector receptacle, A connector part made of a sterilizable material with one end of the fiber facing the laser light emitting end of the handpiece light emitting connector receptacle, and the other end side of the optical fiber protruding outward, and the other end side of the connector part In addition, a cannula made of a sterilizable material that is detachably attachable in a state of passing through the middle portion of the optical fiber and is rotatably mounted and bends the other end of the optical fiber in a desired direction by a rotating operation. This is realized by a configuration having a part.

  Hereinafter, a laser handpiece according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 6, the laser handpiece 1 according to this embodiment is detachably attached to the tip of the laser handpiece 1 itself that emits laser light from a laser light source, and is made of, for example, quartz fiber. The fiber chip 21 that supports the optical fiber 23 is provided. As the laser light source, for example, a laser light source using a semiconductor laser, a YAG laser, a carbon dioxide gas laser or the like is used.

  As shown in FIG. 6, the laser handpiece 1 has a substantially cylindrical handpiece head portion 2 and the inside of the handpiece head portion 2, closer to the other end side from the inner position than the one end side. And a substantially cylindrical optical fiber support 3 that is arranged concentrically with the handpiece head portion 2, and the optical fiber support 3 with respect to the inside of the handpiece head portion 2. For example, a stainless steel handpiece I / O connector receiver that is concentrically arranged and is located in the other end side of the optical fiber support 3 and is connected in series with the optical fiber support 3 in a partially superposed structure. An inner peripheral portion is fixedly connected to the outer periphery of the tube 4 and one end side of the optical fiber support 3, and a screw portion provided on the outer peripheral portion is screwed to the inner peripheral portion on one end side of the handpiece head portion 2. Optical phi A support body 3 and a handpiece light emitting connector receiving cylinder 4 are fixedly arranged in the handpiece head portion 2 and fixedly connected cylinder body 5 and provided at a position inward from one end side in the optical fiber support body 3. Further, the optical fiber support 3 is disposed at the center in the longitudinal direction with respect to the inner thick portion 3a, and is fitted into a receiving hole 3b provided over a certain dimension in the longitudinal direction. And an in-body optical fiber holding cylinder 6 equipped with an in-body optical fiber 7 for guiding the laser light. In FIG. 6, reference numeral 5 a denotes a circular protrusion that is integral with the fixed connecting cylinder 5. The handpiece light emitting connector receiving tube 4 is not limited to the above-described stainless steel, and a metal made of metal with low thermal deformation capable of high precision processing can be adopted.

  The other ends of the in-body optical fiber holding cylinder 6 and the in-body optical fiber 7 are made to coincide with the open end face on the other end side of the receiving hole 3b.

  The handpiece light emitting connector receiving cylinder 4 is provided in a range from the position near the opening end of the receiving hole 3b to the position near the other end of the handpiece head portion 2, and the receiving end for the fiber chip 21 described later in detail on the other end side. A cylindrical portion 4a is formed.

  In addition, light is emitted from the other end of the optical fiber 7 in the main body in a space region from the opening end surface of the receiving hole 3b in the handpiece light emitting connector receiving cylinder 4 to the other end side of the handpiece light emitting connector receiving cylinder 4. The first lens 8 that converts the parallel laser light into the parallel light from the first lens 8 and the second lens 9 that condenses the parallel light from the first lens 8 at the focal position are spaced at a predetermined interval and the outer peripheral portion is received by the handpiece light output connector. It arrange | positions in the state fitted in the cylinder 4. FIG.

  The receiving tube portion 4 a is provided with an optical fiber holding tube receiving hole 10 provided in a region corresponding to the focal position of the second lens 9, and details provided on the inner peripheral portion on the other end side than the optical fiber holding tube receiving hole 10. Includes a female screw 12 for screwing a fiber chip 21 described later. In addition, a spatial region closer to the second lens 9 than the optical fiber holding tube receiving hole 10 is used as a condensing region 11 for the laser light from the second lens 9.

  A laser beam emitted from the other end of the optical fiber 7 in the body is first between the one end side of the handpiece light emitting connector receiving tube 4 and the opening end surface of the receiving hole 3b provided in the optical fiber support 3. A light guide auxiliary cylinder portion 13 for guiding to the lens 8 is provided.

  Next, the fiber chip 21 will be described in detail with reference to FIGS.

  The fiber chip 21 is formed of a sterilizable material, such as a polycarbonate material, whose one end is screwed and joined to the female screw 12 of the handpiece light emitting connector receiving tube 4 that emits laser light provided on the handpiece head portion 2. The connector portion 22 has a substantially cylindrical shape as a whole, and is configured to be detachably and rotatably attached to the other end side of the connector portion 22, and a sterilizable material such as polyetherimide ( And a cannula portion 41 which is formed into a substantially cylindrical shape having a bend and supports the intermediate portion of the optical fiber 23 in the longitudinal direction.

  Examples of the diameter size of the optical fiber 23 include 0.2 mm, 0.3 mm, and 0.4 mm.

  The connector portion 22 is formed by integrally molding a screwing tube portion 24 on one end side and a mounting receiving tube portion 25 on the other end side in a state where they are connected to each other, and one end side of the screwing tube portion 24. A male screw 24b provided on the outer periphery is configured to be screwed into the female screw 12.

  Further, an optical fiber holding cylinder 27 made of, for example, ceramic and formed in a cylindrical shape is provided inside the screwing cylinder portion 24.

  The optical fiber holding cylinder 27 holds and holds a predetermined dimension of one end side of the optical fiber 23 using an adhesive in the through hole 27a.

  Further, the outer peripheral portion of the optical fiber holding cylinder 27 is fixed to the inner wall portion of the screwing cylinder portion 24 with an adhesive, thereby making one end side of the optical fiber 23 unrotatable via the optical fiber holding cylinder 27. I support it.

  Then, the end face on one end side of the optical fiber 23 and the end face on one end side of the optical fiber holding cylinder 24 are made to coincide with each other, and when the fiber chip 21 is screwed into the handpiece head portion 2, one end of the optical fiber holding cylinder 27 is formed. One side of the optical fiber 23 is concentrically opposed to the second lens 9 so as to face the focal position thereof, and the side is fitted into the optical fiber holding tube receiving hole 10 of the handpiece light output connector receiving tube 4. .

  Further, the other end side of the optical fiber 23 is projected outside the other end of the connector portion 22 by a desired dimension.

  There are, for example, two pieces from the position closer to the other end side than the position of the male screw 24b in the outer peripheral part of the screwing cylinder part 24 of the connector part 22 to the outer peripheral part of the mounting receiving cylinder part 25 described later. The rotating operation protrusions 24a are formed so as to project in a 180 degree symmetrical arrangement.

  On the other end side of the connector part 22, a mounting receiving cylinder part 25 for the cannula part 41 having an inner diameter larger than the inner diameter of the screwing cylinder part 24 is formed, and a stepped part 26 is generated in the boundary part between them. The inside of the screwing cylinder part 24 and the inside of the mounting receiving cylinder part 25 are communicated with each other, and the inside of the mounting receiving cylinder part 25 is made to function as a receiving area 33 for the cannula part.

  The mounting receiving cylinder 25 is provided with a movable claw body 28 located adjacent to the stepped portion 26. As shown in FIG. 5, the movable claw body 28 has a concave portion 29 having a certain length along the circumferential direction in a part of the outer periphery of the mounting receiving cylinder portion 25, and both corners of the concave portion 29. A cutout portion 30a having a U-shape as a whole is provided along the length direction of the mounting receiving cylinder portion 25 and the circumferential direction occupying the position in the vicinity of the stepped portion 26, and has a rectangular shape and a recessed portion. A movable piece 30 that is movable with elasticity inside and outside in the radial direction of the mounting receiving cylinder portion 25 is formed using 29 as a support portion. Further, an engaging claw portion 31 that engages with the outer periphery of an annular protrusion 43 provided at one end of a cannula portion 41 described later is formed at the end portion of the movable piece 30 on the step portion 26 side.

  An annular protrusion support receiving portion 32 for fitting the annular protrusion 43 is formed between the engaging claw portion 31 and the wall surface of the step portion 26, and a cannula portion is formed by the annular protrusion support receiving portion 32. It is comprised so that 41 may be rotated 360 degree | times.

  The cannula portion 41 is made of, for example, polyetherimide, as shown in FIGS. 1 to 3 and FIG. 6, and has a tapered hollow cylindrical shape so that the optical fiber 27 can pass through the inside, and The cannula main body 42 having an arcuate shape, the annular protrusion 43 projecting radially outward from one end of the cannula main body 42, and the diameter at a position closer to the other end of the predetermined dimension from the annular protrusion 43 A circular protruding piece 44 protruding outward in the direction is integrally formed by molding.

  The outer diameter of the annular protrusion 43 is slightly larger than the inner diameter of the mounting receiving cylinder 25, and the outer diameter of the circular protruding piece 44 is set to be substantially equal to the inner diameter of the mounting receiving cylinder 25. ing.

  In the present embodiment, the movable claw bodies 28 described above are provided at two positions 180 degrees symmetrical with respect to the center of the mounting receiving cylinder portion 25. However, the number of movable claw bodies 28 is not limited to two. Three, four, etc. may be provided and are not particularly limited.

  FIG. 4 shows a mounting state of the cannula portion 41 with respect to the mounting receiving tube portion 25.

  That is, when one end side of the cannula part 41 penetrating and supporting the optical fiber 27 is pushed into the attachment receiving cylinder part 25 of the connector part 22, the annular protrusion 43 provided on the cannula part 41 becomes the attachment cylinder of the connector part 22. The engaging claw part 31 of the movable claw body 28 provided in the part 25 is once pushed up radially outward together with the movable piece 30 having elasticity.

  And the said annular protrusion 43 fits into the said annular protrusion support receiving part 32, At the same time, the engagement nail | claw part 31 returns to the radial inside by the elasticity, and the cannula located just before the said annular protrusion 43 The outer peripheral part area | region of the main body 42 is pressed, and the detachment | leave from the mounting | wearing receiving cylinder part 25 of the cannula main body 42 is prevented.

  Further, in this state, the outer periphery of the circular protruding piece 44 provided in the cannula portion 41 comes into contact with the inner peripheral portion on the other end side of the mounting receiving cylinder portion 25.

  Thereby, the annular protrusion 43 of the cannula part 41 is rotatably supported in the annular protrusion support receiving part 32, and the outer periphery of the circular protrusion 44 is connected to the inner side of the other end of the mounting receiving cylinder part 25. The cannula 41 is rotated 360 degrees in a desired direction with good operability while the optical fiber 27 is bent without being rotated by a rotation operation based on a stable support state in which the optical fiber 27 is bent. However, the treatment by the laser beam irradiation can be executed by facing the treatment site 45 located in a desired direction.

  FIG. 7 shows a state in which the cannula portion 41 is rotated 180 degrees from the state shown in FIG.

  As described above, according to the laser handpiece 1 of the present embodiment, the optical fiber 23 is bent while the laser light from the laser light source is transmitted with high efficiency and the cannula portion 41 has good rotational operability. Irradiation is performed with the other end facing the treatment site 45 present at various positions, so that treatment of the treatment site 45 can be performed promptly.

  Further, the connector part 22 is made of polycarbonate and has excellent heat resistance and consideration for biosafety. The cannula part 41 is made of polyetherimide and has excellent heat resistance and impact resistance. Provided is a laser handpiece 1 including a fiber chip 21 with a simple configuration that can be used and can be disposable, and can be used as a whole, but can be used more frequently. be able to.

  Further, since the optical fiber holding cylinder 27 is made of ceramic and the fitting accuracy is improved as a fitting structure with the stainless steel handpiece light emitting connector receiving cylinder 4, the connector portion 22 and the cannula portion 41 are thermally deformed by sterilization. Even so, the optical axis of the optical fiber 23 and the optical axis of the laser light on the handpiece head unit 2 side can be matched with high accuracy, and the deflection of the optical fiber 23 is utilized while improving the transmission efficiency of the laser light. Thus, the irradiation direction of the laser light can be set to a desired direction.

  Further, since the optical fiber 23 and the optical fiber 7 in the main body are not in an associated structure, it is possible to prevent end face burnout and end face slippage of the optical fiber 23.

  In this embodiment, the optical fiber 23 can be used with its other end (tip) directly in contact with the treatment site 45.

  For example, if the optical fiber 23 having a diameter of 0.2 mm, which is a thin diameter, is used, the laser density per unit area at the tip of the optical fiber 23 can be increased.

  On the contrary, if the optical fiber 23 having a large diameter of 0.4 mm is used, the laser density per unit area at the tip of the optical fiber 23 can be lowered.

In addition, it is possible to use the optical fiber 23 in response to thin and delicate movements while bending the optical fiber 23 and bringing the distal end into contact with the treatment site 45.
For example, in dental treatment, the optical fiber 23 can be flexibly inserted into a tooth root canal or a periodontal pocket.

Furthermore, it is possible to use the optical fiber 23 while applying a force to the optical fiber 23.
In this case, it is possible to increase the incision force of gingiva and skin by giving the optical fiber 23 stiffness.

  The fiber chip 21 of the present embodiment can be used properly according to various uses in dental treatment.

  The laser handpiece of the present invention, particularly the fiber chip configuration, has various types of lasers in which a fiber chip having an optical fiber is attached to the tip, and the laser light from the laser handpiece is guided to the treatment site by the optical fiber to perform treatment. Widely applicable to handpieces.

DESCRIPTION OF SYMBOLS 1 Laser handpiece 2 Handpiece head part 3 Optical fiber support body 3a Internal thickness part 3b Receiving hole 4 Handpiece light emission connector receptacle 4a Receptacle part 5 Fixed connection cylinder 5a Circular protrusion 6 In-body optical fiber holding cylinder 7 Optical fiber 8 in the body 8 First lens 9 Second lens 10 Optical fiber holding tube receiving hole 11 Condensing region 12 Female screw 13 Light guiding auxiliary tube portion 21 Fiber chip 22 Connector portion 23 Optical fiber 24 Screwing tube portion 24a Rotating operation protrusion 24b Male thread 25 Attached receiving cylinder part 26 Step part 27 Optical fiber holding cylinder 27a Through hole 28 Movable claw body 29 Recessed part 30 Movable piece 30a Cutout part 31 Engaging claw part 32 Annular protrusion support receiving part 33 Cannula part receiving area 41 Cannula Part 42 cannula body 43 annular protrusion 44 circular protrusion 45 treatment site

Claims (3)

A laser handpiece having a removable fiber chip at the tip of a handpiece that emits laser light,
The fiber tip is
A connector portion that is screwed and coupled to one end side of the handpiece, and that holds and holds one end side of an optical fiber that receives laser light emitted from the handpiece and guides it outward.
A bendable cannula part, which is rotatably attached to the other end side of the connector part in a state of passing through the middle part of the optical fiber, and bends the other end side of the optical fiber in a desired direction by a rotation operation;
A laser handpiece comprising: A laser handpiece having a removable fiber chip at the tip of a handpiece that emits laser light,
The fiber tip is
One end side is screwed and coupled to a handpiece light emitting connector receiving tube for emitting laser light provided on the handpiece, and one end side of a ceramic optical fiber holding tube for fixing and holding an optical fiber is connected to the handpiece light emitting connector receiving tube. A connector part made of a sterilizable material that is internally fitted with a fitting structure, with one end of the optical fiber facing the laser light output end of the handpiece light output connector receptacle, and the other end side of the optical fiber protruding outward When,
It is attached to the other end side of the connector part so as to be detachable and rotatable in the middle of the optical fiber, and is bent so that the other end side of the optical fiber is bent in a desired direction by a rotating operation. A cannula portion made of a sterilizable material;
A laser handpiece comprising:   3. The laser handpiece according to claim 1, wherein the connector portion is formed of a polycarbonate material, and the cannula portion is formed of a polyetherimide material.

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