KR20220144596A - Laser handpiece combined with resonator - Google Patents

Abstract

The present invention relates to a handpiece which is on a laser treatment machine used for medical purposes and to be gripped and manipulated by an operator. More specifically, the present invention relates to an easy-to-use handpiece combined with a laser resonator, in which a body with a built-in laser resonator that generates a laser beam and a frame with an irradiation tip are directly connected while securing the concentricity, wherein the frame is inserted and coupled to the body in a slidable manner so as to be easily attached and detached therefrom, and the frame can rotate while being coupled to the body. The handpiece combined with a laser resonator according to the present invention comprises: a body in which the laser resonator is embedded; and a frame which has an irradiation tip that irradiates an affected site with a laser beam outputted from the laser resonator. The frame is inserted and coupled to the body in a slidable manner, the frame coupled to the body can rotate, and a rod of the laser resonator is concentrically arranged on the body.

Description

Laser handpiece combined with resonator}

The present invention relates to a handpiece gripped and manipulated by an operator in a laser treatment machine used for medical purposes, and more particularly, a body having a built-in laser resonator generating a laser beam and a body provided with an irradiation tip are concentric and directly connected It relates to a laser resonator coupling type handpiece that is inserted into and coupled to the body in a slide manner, and is easily detachable, can be rotated in a coupled state, and is convenient to use.

The types of laser surgical instruments used in dentistry are those using diode lasers of 808nm and 980nm, those using Nd:YAG laser wavelengths such as 1064nm and 1320nm, and those using 2940nm Er:YAG laser wavelengths.

The diode laser or Nd:YAG series cannot be used for tooth removal and it is difficult to generate sufficient energy with pulses of several hundred usec due to the characteristics of diode lasers. .

The recently used 2940nm Er:YAG laser is rapidly emerging as a dental laser surgery device, which has the highest water absorption according to the wavelength of 2940nm. At the same time, the laser is irradiated and the water particles are instantaneously exploded due to the water absorption effect of the laser.

When heat is generated on the tooth, the pulp is necrotic, so other laser wavelengths other than the 2940nm band cannot be used for teeth.

The general structure of a dental laser consists of a laser resonator, an optical fiber for laser transmission, and a handpiece. The handpiece must be small and similar in shape to the existing drill-type handpiece, so it is less inconvenient to use while holding it.

The size of the handpiece has a significant impact on the operation because it requires a sophisticated operation in a narrow oral cavity.

In addition, unlike a skin beauty laser, an optical fiber, not a joint arm type, should be used as a transmission medium for smooth operation.

That is, the dental laser has a problem in operation, so a handpiece that is flexible and comfortable to hold must be accommodated in the final stage.

The current Er:YAG dental laser has a structure as mentioned above, and the laser is transmitted from the laser resonator to the handpiece through the optical fiber.

In the handpiece, a tip similar to a drill made of a material that passes 2940nm wavelength made of sapphire, etc., is attached to the end of the handpiece, and the treatment is performed by contacting the teeth or gums.

In addition, air and water are transmitted to the handpiece through a tube parallel to the optical fiber and sprayed from the tip of the handpiece to the tip, reacting with the laser irradiated from the tip to explode the water particles. it becomes possible

Therefore, the handpiece is made rather complicated, including the structure for not only laser transmission but also water injection.

However, in the case of the 2940 nm laser with the above structure, the optical fiber is currently limited to fluoride oxide and sapphire optical fiber, unlike optical fibers used in other wavelength lasers. There is a problem that the laser input/output terminal is easily damaged. Therefore, due to the high cost of raw materials and weak maintenance, the dissemination of dental lasers has not been made significantly.

Therefore, the technology of reducing the laser resonator and directly connecting it to the handpiece appeared and a dental 2940nm laser without optical fiber was developed.

Therefore, the method of securing the degree of freedom by using a reflector and joint between the laser resonator and the handpiece and the method of directly connecting the laser resonator with a certain angle with the handpiece are used.

When a reflector and joint are used, the degree of freedom is improved, but a precise alignment structure is required in the laser path from the laser resonator to the handpiece. there is

Even in the structure where the handpiece and the resonator are directly connected with a certain angle, there is a problem that alignment is required and the handpiece is fixed without a joint structure, so it is inconvenient to use it as the weight of the laser resonator.

Due to the characteristics of dental instruments, the user's operability is very important even for laser instruments. Since laser treatment for skin care does not require elaborate manipulation such as holding it outside the treatment position and inserting instruments into the skin, the degree of freedom in operation does not affect the treatment result.

However, dental procedures in narrow areas such as the oral cavity require very sophisticated manipulations. Flexibility of the operation part is a very important factor because it can cause fatigue due to long-time use.

The operation of the conventional dental laser using optical fiber is not different from that of the conventional drill handpiece because only optical parts for laser delivery and focusing are built into the handpiece.

However, if a laser resonator directly connected to the handpiece is implemented, the size increases and the weight increases.

Therefore, the center of gravity of the handpiece combined with the laser resonator should be considered as an important consideration for operability.

In the structure where the handpiece and the laser resonator are connected with the existing joint structure, the center of gravity is applied to the wrist, so the inconvenience of operation cannot be greatly felt during the procedure. Due to the complicated structure that has to be done, the cost increase was added, and the effect was not more effective than the removal of the optical fiber.

And the direct connection method between the resonator and the handpiece of the prior art "Dental laser device (1020150072115) in which the resonator is directly connected to the handpiece" reduces the alignment part as much as possible by removing the joint and simplifies the structure. Due to the grip of the handpiece, the center of gravity is formed in the laser resonator, which is the rear part, which complained of inconvenience to the user. In addition, in order to reduce the laser resonator, the laser output part has an eccentric structure that is biased to one side rather than the center, and has a structure that is combined with the handpiece at a certain angle.

For reference, as a prior art related to a handpiece with a built-in laser resonator, Patent Registration No. 1338241 "Laser Resonator Coupled Handpiece Device", Registered Patent No. 10-1550414 "Dental Laser Device with Resonator Directly Connected to Handpiece", etc. There is this.

The present invention is an invention devised to solve the problem of the laser resonator coupling type handpiece according to the prior art,

Since the body with the irradiation tip and the body with the laser resonator are directly connected with concentricity, there are no optical parts that require alignment and it is not a joint type with joints or angles. It is simple, the body can be rotated independently of the body, the handpiece is lightweight and compact, and the center of gravity is located in the area held by the operator, so the operation is convenient and efficient, and the body slides on the body An object of the present invention is to provide a laser resonator coupling type handpiece that can be attached and detached simply and quickly.

Laser resonator coupling type handpiece according to the present invention for achieving the above object

a body with a built-in laser resonator;

In the laser resonator coupled handpiece comprising a; a body provided with an irradiation tip for irradiating the laser beam output from the laser resonator to the affected part,

The laser resonator includes a reflector having a circular or oval appearance, a flash lamp built in the reflector to emit light, and a rod to resonate the incident light emitted from the flash lamp when built into the reflector to form a laser beam. Including, wherein the rod is located in the center of the body and has concentricity with the body,

The body is inserted and coupled to the body in a slide manner,

The body coupled to the body is characterized in that the rotation is possible.

And as a coupling contact portion between the body and the body, a clamp groove is formed on the outer circumferential surface of the body, and a ball bearing is provided on the inner circumferential surface of the body to be seated and hung in the clamp groove,

A clip ring for separating the ball bearing from the clamp groove and a knob for operating the clip ring are provided on the body,

The rear of the body is provided with a cover for covering the front side outer surface of the body,

The body and the center of gravity of the handpiece coupled to the body is characterized in that it is located on the cover,

the body is

a body incorporating the laser resonator;

a coupling portion provided at the front of the body and coupled to the rear of the body;

It is connected to the front of the coupling part and includes an insertion part inserted into the body,

A focusing lens for focusing the laser beam emitted from the rod of the laser resonator is provided at the front end of the insertion part,

The irradiation tip of the body irradiates the laser beam at an angle between 45 and 90 degrees with respect to the longitudinal direction,

It is characterized in that a reflector is provided inside the body to reflect the laser beam incident from the focusing lens to the irradiation tip.

In the laser resonator combined handpiece according to the present invention, the body having the laser resonator built-in and the body having the irradiation tip are concentrically connected in a straight line to give operational friendliness. Manufacturing cost is reduced by reducing the cost of raw materials through simplification, has a diameter and weight that is easy to grip, and the body with the irradiation tip rotates on the body containing the laser resonator for convenient and efficient operation, and the body slides on the body It is a very useful invention for industrial development as a product that is easily combined in this way, is firmly fixed by the combination of a ball bearing clamp groove, and can be separated simply by operating a knob.

1 is a view showing a body and a body in a laser resonator coupling type handpiece according to the present invention.
Figure 2 is a view showing the main part of the body and the coupling portion of the body according to the present invention.
Figure 3 is a view showing the main part of the laser resonator built into the body in the present invention.
4 is a view showing the arrangement of the focusing lens, the reflector, and the irradiation tip and the transmission of the laser beam in the present invention.

Hereinafter, the laser resonator coupling type handpiece according to the present invention will be described in more detail with reference to the drawings.

Prior to explaining in more detail with respect to the laser resonator coupling type handpiece according to the present invention,

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference sign, particularly the number of the tens and one digit, or the reference numerals having the same tens, one, and alphabet, indicates a member having the same or similar function, and unless otherwise specified, each of the figures in the drawings The member indicated by the reference sign may be understood as a member conforming to these standards.

In addition, in each drawing, in consideration of the convenience of understanding, the size or thickness is exaggeratedly large (or thick) small (or thin) or simplified, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

As shown in the drawings, the laser resonator coupling type handpiece according to the present invention has a body 10, a body 20, a laser resonator 30 built into the body 10, and an irradiation tip 40 provided in the body 20. ) is included.

1 and 3 , the body 10 includes a main body 11 in which the laser resonator 30 is embedded, and is provided in front of the main body 11 and is coupled to the rear of the body 20 . It consists of a coupling part 12 and an insertion part 13 connected to the front of the coupling part 12 and inserted into the interior of the body 20 .

A focusing lens 14 for focusing the laser beam emitted from the rod of the laser resonator 30 is provided at the front end of the insertion part 13 .

Referring to FIG. 1 , the body 20 includes a cover 21 covering the step 111 formed in the front of the body 11 of the body 10 , and a coupling part 12 of the body 10 . A corresponding coupling portion 22 coupled to the, a guide portion 23 to which the insertion portion 13 is inserted and coupled in a slide manner, and a reflector 41 and an irradiation tip provided at the front end of the guide portion 23 ( 40) with a built-in head (24).

The head 24 has an angle between 45 degrees and 90 degrees with respect to the guide part 23 . That is, the irradiation tip 40 embedded in the head 24 has an angle between 45 and 90 degrees with respect to the longitudinal direction. This is an angle that makes it easy to irradiate the laser beam to the upper and lower jaws of the patient, and the present invention allows the body 20 to rotate in the body 10 so that the direction of the irradiation tip 40 can be easily changed.

2, the coupling portion 12 and the insertion portion 13 of the body 10 are provided with two O-rings 15 and 16, respectively, so that the corresponding coupling portion 22 of the body 20 and Since it is closely attached to the guide part, it prevents foreign substances such as fine dust from penetrating into the interior, and prevents leakage of water and air discharged in the irradiation direction of the laser beam.

1 and 2, in order to allow the body 20 coupled in a slide manner to be rotatably and firmly fixedly coupled to the body 10, and to be easily separated, the coupling part 12 of the body 10 A clamp groove 17 is formed on the outer periphery, and a ball bearing 27 is provided on the inner circumferential surface of the corresponding coupling part 22 of the body 20 to be caught and seated in the clamp groove 17, and the corresponding coupling part 22 is provided. ) A knob 28 operated by the user by pressing is provided on the outer surface, and inside the corresponding coupling part 22 , the ball bearing 27 is separated from the clamp groove 17 by the operation of the knob 28 ). (not shown) is provided.

When the body 20 is inserted and coupled to the body 10 in a slide manner, the ball bearing 27 comes into contact with the coupling part 12 and retreats outwardly, and then returns to the inside in the clamp groove 17 , It is seated to firmly fix the body 20 to the body 10 . At this time, the ball bearing 27 can rotate freely so that the body 20 can rotate in the body 10 .

When the user presses the knob 28, the clip ring retracts the ball bearing 27 to the outside to separate it from the clamp groove 17, and in this state, when the body 20 is pulled, it is easily separated from the body 10.

3, the laser resonator 30 built into the body 10 includes a reflector 31 having a circular or oval appearance, a flash lamp 32 built in the reflector 31 and emitting light; , and a rod 33 that resonates the incident light emitted from the flash lamp 32 into a laser beam when built into the reflector 31 .

The flash lamp 32 and the Er;YAG laser rod 33 are mounted in parallel inside the cylindrical reflector 31 . The reflector 31 may have an elliptical shape. In the case of an elliptical shape, the light emitted from the flash lamp 32 forms a more reliable focusing on the rod 33 , thereby improving efficiency. And the discharge pipe 34 is positioned parallel to the reflector (31). The front and rear surfaces of the reflector 31 are all assembled with parts for sealing for cooling water circulation, and the rear side has a tube connector for cooling water inflow and the front side has a structure in which the discharge pipe 34 is inserted, and both flash lamps 32 and Both ends of the rod 33 are exposed to the outside and have a sealing structure.

Cooling water flows into the reflector 31 to cool the rod 33 and the flash lamp 32 , and the cooling water is discharged through the discharge pipe 34 .

When the reflector 31 is cylindrical, the distance between the rod 33 and the flash lamp 32 is arranged to maintain at least 1 mm for cooling water circulation. (32) is placed.

Since the diameter of the laser resonator 30 is determined based on the rod 33 being located in the center, it is manufactured with a minimum diameter considering the mounting of the reflector 31 in the body 10 and the discharge pipe 34 . became Based on this structure, the diameter of the laser resonator 30 can be reduced to about 20 mm. In addition, the laser resonator 30 should have a water and air transmission tube for spraying built-in. Although the outer diameter is a small tube of about 2 mm to 3 mm, it occupies a considerable space in consideration of the diameter of the laser resonator 30 . The two transmission pipes are symmetrically disposed on the left and right sides of the cooling water discharge pipe 34 to increase space utilization.

The (-) pole of the polarity of the flash lamp 32 is positioned at the front end of the laser resonator 30 and electrically connected to the body 10 so that the flash lamp 32 connection cable is not the front end of the laser resonator 30, but the rear end. is connected to secure the space of the front end according to the cable removal, and by dispersing the heat generated from the (-) electrode to the body 10, it acts as a heat sink to lower the temperature of the laser resonator 30. Since the part gripped by the user is the front end of the laser resonator 30, the heat generated here causes a serious problem. Therefore, when the (-) electrode is connected to the body 10, since the (-) cable does not need to extend to the front end, it does not take up space, and heat generated from the electrode can be dispersed to remove the user's feeling of heat. And the instantaneous voltage generated at the (-) pole is several KV when the flash lamp 32 is triggered to turn on. The short time of a few usce and the small energy of several mJ do not affect the human body, but when the user directly touches it, it is enough to feel a shock. Therefore, since the body 10 in contact with the (-) pole must be insulated from the outside, the part connected to the handpiece is electrically insulated using a plastic-based material.

The material of the reflector 31 is transparent, such as quartz, and is strong against heat, so that the light of the lamp is transmitted directly to the rod 33, and the outside is coated with a material suitable for the wavelength of the laser, such as silver, gold, barium oxide, etc. The flash of the lamp 32 is reflected and focused on the rod 33 .

The rod 33 is coated so that the rear surface is totally reflected in the corresponding laser wavelength and the front surface has a certain amount of reflectivity. The reflectance to be coated is changed from 50% to 90% in consideration of the physical properties for each wavelength.

Referring to FIG. 4 , the laser beam emitted from the laser resonator 30 is focused by the focusing lens 14 and is incident on the reflective mirror 41 , and the reflective mirror 41 reflects the incident laser beam to the irradiation tip 40 . ) is entered. The irradiation tip 40 irradiates the incident laser beam to the affected area.

Here, the laser beam focused by the focusing lens 14 is defocused and is incident on the reflecting mirror 41 .

The focusing lens 14 has a function of protecting the laser resonator 30 when external dust or moisture enters the inside of the laser resonator 30 and is deposited on the rod 33 , the coating surface of the rod 33 is damaged and laser generation is significantly lowered. .

The irradiation tip 40 is a part that is in contact with the treatment site and irradiated with a laser beam for tissue incision or tooth removal. Tips can be fitted.

In the above description of the present invention, a laser resonator coupled handpiece having a specific shape and structure has been described with reference to the accompanying drawings, but the present invention is capable of various modifications and changes by those skilled in the art, and these modifications and changes are It should be construed as belonging to the protection scope of the invention.

10: body 11: body
12: coupling part 13: insertion part
14: focusing lens 15, 16: O-ring
17: clamp groove
20: body 21: cover
22: corresponding coupling part 23: guide part
24: head 27: ball bearing
28 : knob
30: laser resonator 31: reflector
32: flash lamp 33: rod
34: discharge pipe
40: irradiation tip 41: reflector

Claims (4)

a body with a built-in laser resonator;
In the laser resonator coupled handpiece comprising a; a body provided with an irradiation tip for irradiating the laser beam output from the laser resonator to the affected part,

The laser resonator includes a reflector having a circular or oval appearance, a flash lamp built in the reflector to emit light, and a rod to resonate the incident light emitted from the flash lamp when built into the reflector to form a laser beam. Including, wherein the rod is located in the center of the body and has concentricity with the body,
The body is inserted and coupled to the body in a slide manner,
The body coupled to the body is a laser resonator coupling type handpiece, characterized in that it is rotatable. The method of claim 1,
As a coupling contact portion between the body and the body, a clamp groove is formed on the outer circumferential surface of the body, and a ball bearing is provided on the inner circumferential surface of the body to be seated and hung in the clamp groove,
A laser resonator coupled handpiece, characterized in that the body is provided with a clip ring for separating the ball bearing from the clamp groove, and a knob for operating the clip ring. The method of claim 1,
The rear of the body is provided with a cover for covering the front side outer surface of the body,
A laser resonator coupled handpiece, characterized in that the body and the center of gravity of the body-coupled handpiece are located on the cover. 4. The method according to any one of claims 1 to 3,
the body is
a body incorporating the laser resonator;
a coupling portion provided at the front of the body and coupled to the rear of the body;
It is connected to the front of the coupling part and includes an insertion part inserted into the body,
A focusing lens for focusing the laser beam emitted from the rod of the laser resonator is provided at the front end of the insertion part,
The irradiation tip of the body irradiates the laser beam at an angle between 45 and 90 degrees with respect to the longitudinal direction,
A laser resonator coupled handpiece, characterized in that a reflector is provided inside the body to reflect the laser beam incident from the focusing lens to the irradiation tip.

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