Laser-induced plasma cavitation-activated root canal irrigation device

Abstract

Provided is a laser-induced plasma cavitation-activated root canal irrigation device, which comprises: a working host (110), a light guide member (120), and a working hand tool (130). The working host (110) is provided with a laser generation module, and the light guide member (120) is connected to the laser generation module and the working hand tool (130). The laser generation module is configured to generate a laser beam. The light guide member (120) is configured to transmit the laser beam generated by the laser generation module to the working hand tool (130). The working hand tool (130) is configured to focus the received laser beam into an irrigation liquid (21) in a pulp cavity (20), utilizing the laser energy to generate a photoinduced breakdown effect within the irrigation liquid (21) in the pulp cavity (20), thereby inducing plasma cavitation to activate the irrigation liquid (21) in the root canal for irrigating the root canal.

Description

A laser-induced plasma cavitation activated root canal irrigation device

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202411776934.4, filed on December 5, 2024, entitled "A Laser-Induced Plasma Cavitation Activated Root Canal Irrigation Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to, but is not limited to, the field of electronic medical device technology, and in particular to a root canal irrigation device activated by laser-induced plasma cavitation. Background Technology

[0004] Pulp and periapical diseases are common and frequently occurring conditions in dental clinics. Currently, the main approach to preserving natural teeth is through root canal treatment and crown restoration. Root canal treatment includes steps such as access cavity preparation, canal cleaning and preparation, canal irrigation and disinfection, and canal filling. The key to successful root canal treatment lies in effectively controlling infection within the root canal system and preventing reinfection during the procedure. Canal irrigation is a crucial step in infection control during root canal treatment. It involves using irrigating solutions to flush the entire root canal system, removing soft and hard tissue debris, infectious bacterial biofilms, and smears generated during preparation. However, current root canal irrigation equipment often lacks sufficient irrigation solution, resulting in inadequate irrigation and disinfection, and the instruments used in these devices are not always flexible or convenient to operate. Summary of the Invention

[0005] In view of this, the present disclosure provides at least one laser-induced plasma cavitation activated root canal irrigation device, which can more thoroughly irrigate the root canal to improve the effect of root canal irrigation and disinfection, reduce the probability of infection during root canal treatment, and thus improve the success rate of root canal treatment. Furthermore, during the root canal irrigation process, the working position of the instruments is not restricted, thereby improving the flexibility and convenience of operation and reducing the difficulty of instrument operation in complex and narrow oral spaces.

[0006] The technical solution of this disclosure embodiment is implemented as follows:

[0007] This disclosure provides a laser-induced plasma cavitation activated root canal irrigation device, comprising:

[0008] The system comprises a main unit, a light guide, and a working handpiece. The main unit contains a laser generating module, and the light guide connects the laser generating module and the working handpiece.

[0009] The laser generating module is used to generate a laser beam;

[0010] The light guide is used to transmit the laser beam generated by the laser generating module to the working hand;

[0011] The working tool is used to focus the received laser beam onto the rinsing fluid in the pulp cavity, and use the laser energy to generate a photo-induced breakdown effect in the rinsing fluid in the pulp cavity, and induce plasma cavitation to activate the rinsing fluid in the root canal, so as to irrigate the root canal.

[0012] In some embodiments, the laser beam generated by the laser generating module forms a focal point in the irrigation fluid in the pulp cavity via the light guide and the working tool. The power density of the focal point is greater than a density threshold, which is the breakdown threshold of the irrigation fluid.

[0013] In some embodiments, the laser generating module includes a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

[0014] In some embodiments, the working tool is used to focus the received laser beam into the rinsing fluid in the pulp cavity using a target focusing method; the target focusing method includes one of the following: contact with the rinsing fluid in the pulp cavity, or no contact with the rinsing fluid in the pulp cavity.

[0015] In some embodiments, the working tool includes an optical focusing component; the optical focusing component is used to focus a received laser beam onto the rinsing fluid in the pulp cavity in a non-contact manner.

[0016] In some embodiments, the root canal irrigation device further includes a laser aiming element; the laser aiming element is used to output visible light coaxial with the laser beam to aim at the focal point of the laser beam using the visible light.

[0017] In some embodiments, the working tool has an optical fiber head; the optical fiber head is used to focus the received laser beam onto the laser output end of the optical fiber head by contacting the rinsing fluid in the pulp cavity, so as to form a focal point in the rinsing fluid in the pulp cavity.

[0018] In some embodiments, the root canal irrigation device further includes a control unit; the control unit is communicatively connected to a control port on the host computer and is used to control the laser generating module to generate a laser beam through the control port.

[0019] In some embodiments, the control element includes a control pedal; the control pedal is used to control the laser generating module to generate a laser beam via the control port when the first pedal position is engaged.

[0020] In some embodiments, the root canal irrigation device further includes a laser aiming element; the control foot pedal is also used to control the laser aiming element to output visible light coaxial with the laser beam through the control connection when in the second pedal position, so as to aim at the focal point of the laser beam using the visible light.

[0021] In some embodiments, the working host is further provided with a pumping device and a reservoir; the pumping device is used to deliver the rinsing fluid in the reservoir to the pulp chamber during the process of the working hand rinsing the root canal using the photo-induced breakdown effect.

[0022] The laser-induced plasma cavitation activated root canal irrigation device provided in this embodiment includes a main unit, a light guide, and a working tool. The main unit is equipped with a laser generating module, and the light guide connects the laser generating module and the working tool. The laser generating module is used to generate a laser beam. The light guide is used to transmit the laser beam generated by the laser generating module to the working tool. The working tool is used to focus the received laser beam into the irrigation fluid in the pulp cavity, using the laser energy to generate a photo-induced breakdown effect in the irrigation fluid in the pulp cavity and induce plasma cavitation to activate the irrigation fluid in the root canal for irrigation. This root canal irrigation device, on the one hand, activates the irrigation fluid within the root canal by utilizing the photo-induced breakdown effect to induce plasma cavitation. This enhances the oscillation effect of the irrigation fluid within the root canal, thereby enabling more thorough irrigation and improving the effectiveness of root canal irrigation and disinfection. This reduces the probability of infection during root canal treatment and ultimately increases the success rate of root canal treatment. On the other hand, during root canal irrigation, the laser beam is focused on the irrigation fluid in the pulp chamber, forming a high-power-density energy convergence zone at the focal point within the irrigation fluid. This energy instantly breaks down the irrigation fluid. The laser energy used to generate the photo-induced breakdown effect is typically high and not completely absorbed by the liquid, allowing it to penetrate the surface of the irrigation fluid in the pulp chamber. The power density achieved at the focal point can produce a photo-induced breakdown effect. Therefore, during root canal irrigation, the handpiece does not need to be inserted into the irrigation fluid in the pulp chamber to allow the laser energy to reach the focal point within the irrigation fluid. This allows for unrestricted operation of the handpiece during root canal irrigation, improving operational flexibility and convenience, and reducing the difficulty of instrument operation in complex and confined oral spaces.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of this disclosure. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0025] Figure 1 is a schematic diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure;

[0026] Figure 2 is a schematic diagram of a working tool provided in an embodiment of the present disclosure focusing a laser beam into the rinsing fluid in the pulp cavity;

[0027] Figure 3 is a schematic diagram of a working tool provided in an embodiment of this disclosure that focuses a laser beam into the pulp cavity to generate plasma and form cavitation bubbles;

[0028] Figure 4 is a schematic diagram of a working tool provided in an embodiment of this disclosure focusing a laser beam onto the expansion and quenching of cavitation bubbles formed in the pulp cavity;

[0029] Figure 5 is a schematic diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure;

[0030] Figure 6 is a schematic diagram of the composition structure of a working tool provided in an embodiment of this disclosure;

[0031] Figure 7 is a schematic diagram of the composition structure of a working tool provided in an embodiment of this disclosure;

[0032] Figure 8 is a schematic diagram of the composition structure of a working tool provided in an embodiment of this disclosure;

[0033] Figure 9 is a schematic diagram of the composition of a working tool provided in an embodiment of this disclosure;

[0034] Figure 10 is a schematic diagram of the composition structure of a working tool provided in an embodiment of this disclosure;

[0035] Figure 11 is a schematic diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure;

[0036] Figure 12 is a schematic diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure;

[0037] Figure 13 is a schematic diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure;

[0038] Figure 14 is a schematic block diagram of the composition structure of a root canal irrigation device provided in an embodiment of this disclosure. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of this disclosure are further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments should not be regarded as limitations on this disclosure. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0040] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0041] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. The terms "first / second / third" are merely used to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this disclosure.

[0043] The terms "setup" and "connection" in this document should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a detachable connection or an electrical connection. They can refer to a direct connection or an indirect connection via an intermediate medium, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0044] Furthermore, the technical features involved in the different embodiments of this disclosure described below can be combined with each other as long as they do not conflict with each other.

[0045] This disclosure provides a laser-induced plasma cavitation activated root canal irrigation device, which can more thoroughly irrigate the root canals, thereby improving the irrigation and disinfection effect, reducing the probability of infection during root canal treatment, and thus increasing the success rate of root canal treatment. Furthermore, the working position of the instruments is unrestricted during root canal irrigation, improving operational flexibility and convenience, and reducing the difficulty of instrument operation in complex and confined oral spaces. Figure 1 is a schematic diagram of the composition structure of a root canal irrigation device provided in this disclosure embodiment. As shown in Figure 1, the root canal irrigation device 100 includes:

[0046] The system comprises a main unit 110, a light guide 120, and a working handpiece 130. The main unit 110 contains a laser generating module (not shown in the figure), and the light guide 120 connects the laser generating module and the working handpiece 130.

[0047] The laser generating module is used to generate a laser beam;

[0048] The light guide 120 is used to transmit the laser beam generated by the laser generating module to the working handpiece 130;

[0049] The working tool 130 is used to focus the received laser beam onto the rinsing fluid in the pulp chamber, using laser energy to generate a laser-induced breakdown effect in the rinsing fluid in the pulp chamber, and to induce plasma cavitation to activate the rinsing fluid in the root canal for rinsing.

[0050] Here, the host machine 110 is equipped with a laser generating module, which can generate any suitable laser that can produce a photo-induced breakdown effect in the rinsing fluid in the pulp cavity.

[0051] It is understood that the laser-induced plasma cavitation activated root canal irrigation device provided in this disclosure refers to a root canal irrigation device based on laser-induced plasma cavitation to activate the irrigation fluid. This root canal irrigation device can utilize the photo-induced breakdown effect to form a laser-induced cavitation effect in the irrigation fluid within the pulp cavity to activate the irrigation fluid. Laser-induced cavitation refers to the ionization and breakdown of the irrigation fluid when the laser power density exceeds the breakdown threshold of the irrigation fluid, generating plasma within the irrigation fluid. The plasma cavity rapidly expands outward, generating and radiating irrigation waves within the irrigation fluid, and forming cavitation bubbles. The expansion of cavitation bubbles generates high-pressure impact oscillations in the rinsing fluid. Simultaneously, the quenching of cavitation bubbles creates a negative pressure that reaches the saturated vapor pressure of the rinsing fluid at room temperature, inducing a large number of small cavitation bubbles. The high temperature and pressure during cavitation bubble quenching further generate plasma, leading to secondary expansion and quenching of cavitation bubbles. This repeated oscillation several times activates the rinsing fluid through the expansion, oscillation, and quenching of cavitation bubbles. Compared to related root canal activation rinsing techniques where the rinsing fluid changes from liquid to gas during activation, the root canal rinsing device provided in this disclosure utilizes the photo-induced breakdown effect. During activation, the rinsing fluid changes from liquid to plasma. The rinsing waves and cavitation bubbles formed by the plasma exert a better oscillation and activation effect on the rinsing fluid, resulting in a stronger mechanical scouring effect.

[0052] As shown in Figure 2, the working tool 130 can focus the laser beam into the rinsing fluid 21 in the pulp cavity 20, forming a high-power-density energy convergence zone 22 at the focal point. Under the action of the laser energy, the rinsing fluid in the energy convergence zone 22 is ionized and broken down, generating plasma. As shown in Figure 3, after the plasma is generated, a plasma cavity is formed in the rinsing fluid. The plasma cavity expands rapidly outward, generating and radiating rinsing waves within the rinsing fluid 21, and forming cavitation bubbles 23. The expansion of cavitation bubbles 23 instantly generates high-pressure impact oscillations in the rinsing fluid. As shown in Figure 4, the instantaneous expansion and quenching of cavitation bubbles 23 instantly generates a negative pressure in the rinsing fluid 21, reaching the saturated vapor pressure of the rinsing fluid at room temperature, thereby inducing the generation of a large number of small cavitation bubbles 24 in the rinsing fluid. This can activate the rinsing fluid.

[0053] In some embodiments, the working host 110 may also include at least one of the following: a power control module, a working parameter adjustment panel, a cooling device, a pumping device, and a reservoir. The power control module can be used to control the input voltage of the laser generating module to adjust the pulse width, power, and / or wavelength of the laser beam output by the laser generating module. The working parameter adjustment panel can be used to set the root canal irrigation program, the single-pulse energy, and / or frequency of the laser beam output by the laser generating module. The cooling device can be used to cool the various modules in the working host. The reservoir is used to store the irrigation fluid, and the pumping device is used to deliver the irrigation fluid from the reservoir to the pulp chamber during root canal irrigation.

[0054] The irrigating solution can be any suitable root canal irrigating solution determined based on the actual condition of the pulp chamber to be irrigated in clinical practice, and this disclosure does not limit this. For example, the irrigating solution can include, but is not limited to, at least one of distilled water, physiological saline, hydrogen peroxide, ethylenediaminetetraacetic acid (EDTA) solution, sodium hypochlorite solution, chlorhexidine solution, etc. The irrigating solution can exert a disinfecting or chelating effect on the root canal through physical flushing and chemical action, thereby achieving the effect of cleaning and disinfecting the entire root canal system.

[0055] The light guide 120 can be any suitable component that can be used for beam transmission, and the embodiments disclosed herein are not limited in this regard. For example, the light guide 120 can be at least one of, but not limited to, optical fibers, light guide articulated arms, etc.

[0056] In some embodiments, as shown in FIG1, the light guide 120 includes a light guide articulated arm with a built-in optical reflection transmission system. The light guide articulated arm can transmit laser light from the laser generating module in the host machine 110 to the working handpiece 130 through the built-in optical reflection transmission system. The light guide articulated arm may have multiple joints; for example, the number of joints in the light guide articulated arm may be 2, 3, 5, 8, or 10.

[0057] In some embodiments, as shown in FIG5, the light guide 120 includes a light guide fiber 122. The laser beam output by the laser generating module in the host machine 110 can enter the light guide fiber 122 through the coupling mirror and be transmitted into the working handpiece 130 through the light guide fiber 122.

[0058] The handpiece 130 can be any suitable instrument that is easy to hold and can focus the laser beam received from the light guide 120 onto the rinsing fluid in the pulp chamber. The operator (e.g., a dentist) can hold the handpiece 130 to focus the laser beam onto the rinsing fluid in the pulp chamber to perform root canal irrigation on the patient's teeth. For example, the handpiece can be a pen-shaped handle.

[0059] It should be noted that the embodiments disclosed herein do not limit the transmission direction of the laser in the working tool 130. In practice, those skilled in the art can design a suitable transmission direction for the laser in the working tool 130 according to the actual situation, so as to facilitate the operation of medical personnel during root canal irrigation.

[0060] The laser-induced plasma cavitation activated root canal irrigation device provided in this embodiment includes a main unit, a light guide, and a working tool. The main unit is equipped with a laser generating module, and the light guide connects the laser generating module and the working tool. The laser generating module is used to generate a laser beam. The light guide is used to transmit the laser beam generated by the laser generating module to the working tool. The working tool is used to focus the received laser beam into the irrigation fluid in the pulp cavity, using the laser energy to generate a photo-induced breakdown effect in the irrigation fluid in the pulp cavity and induce plasma cavitation to activate the irrigation fluid in the root canal for irrigation. This root canal irrigation device, on the one hand, activates the irrigation fluid within the root canal by utilizing the photo-induced breakdown effect to induce plasma cavitation. This enhances the oscillation effect of the irrigation fluid within the root canal, thereby enabling more thorough irrigation and improving the effectiveness of root canal irrigation and disinfection. This reduces the probability of infection during root canal treatment and ultimately increases the success rate of root canal treatment. On the other hand, during root canal irrigation, the laser beam is focused on the irrigation fluid in the pulp chamber, forming a high-power-density energy convergence zone at the focal point within the irrigation fluid. This energy instantly breaks down the irrigation fluid. The laser energy used to generate the photo-induced breakdown effect is typically high and not completely absorbed by the liquid, allowing it to penetrate the surface of the irrigation fluid in the pulp chamber. The power density achieved at the focal point can produce a photo-induced breakdown effect. Therefore, during root canal irrigation, the handpiece does not need to be inserted into the irrigation fluid in the pulp chamber to allow the laser energy to reach the focal point within the irrigation fluid. This allows for unrestricted operation of the handpiece during root canal irrigation, improving operational flexibility and convenience, and reducing the difficulty of instrument operation in complex and confined oral spaces.

[0061] In some embodiments, the laser beam generated by the laser generating module forms a focal point in the irrigation fluid in the pulp cavity via the light guide 120 and the working tool 130. The power density of the focal point is greater than a density threshold, which is the breakdown threshold of the irrigation fluid.

[0062] Here, the breakdown threshold of the flushing fluid can be determined based on the actual flushing fluid used, and this disclosure does not limit this.

[0063] For example, the breakdown threshold can be 10. 10 W / cm 2 10 11 W / cm 2 Or 10 12 W / cm2 wait.

[0064] In implementation, the operating wavelength range, pulse width range, and single-pulse energy of the laser generated by the laser generating module can all be determined according to actual conditions, as long as the power density at the focal point of the laser beam output by the working handpiece 130 is greater than the breakdown threshold of the rinsing fluid. This embodiment of the present disclosure is not limited in this respect. For example, the laser generating module can generate ultraviolet lasers, visible lasers, and / or infrared lasers, as long as the generated laser is sufficient to ensure that the power density at the focal point of the laser beam output by the working handpiece is greater than the breakdown threshold of the rinsing fluid.

[0065] In some implementations, the pulse width of the laser generated by the laser generating module can be less than 10 nanoseconds (ns). Using this pulsed laser, a high-power-density energy convergence region is formed at the focal point by beam expansion, collimation, or direct beam focusing. This region can instantly break down the liquid, generating luminescent plasma, which then instantly produces vaporized cavitation bubbles in the liquid under high temperature and pressure.

[0066] In some implementations, the laser generated by the laser generating module can have an operating wavelength of 1064 nm, a pulse width range of 6 ns to 8 ns, and a single pulse energy range of 100 millijoules (mJ) to 300 mJ.

[0067] In some implementations, the laser generated by the laser generating module may include near-infrared (NIR) laser. The wavelength range of near-infrared laser is between the visible light (VIS) wavelength range and the mid-infrared light (MIR) wavelength range; for example, the wavelength of near-infrared laser can be in the range of 780–2526 nm.

[0068] Understandably, compared to related technologies that utilize the characteristic that the energy of mid-infrared lasers can be well absorbed by water, and use the absorption of laser energy by the liquid to heat the liquid and generate vapor bubbles to achieve laser-activated rinsing, in this embodiment, on the one hand, the pulse width of the laser generated by the laser generating module can be set to less than 10 nanoseconds, which allows the laser energy to be released instantaneously at the focal point, which is conducive to the instantaneous generation of photo-induced breakdown effect in the rinsing fluid in the pulp cavity to form plasma, without waiting for the liquid to absorb and accumulate energy. On the other hand, since it is not necessary to use the absorption of laser energy by the liquid to heat the liquid, the laser generated by the laser generating module can use a wavelength range that is not easily absorbed by water, such as the near-infrared wavelength range, the visible light wavelength range, and / or the ultraviolet light wavelength range.

[0069] In some embodiments, the laser generating module may include a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

[0070] It is understandable that the operating pulse width or range of a nanosecond laser is on the order of nanoseconds, the operating pulse width or range of a picosecond laser is on the order of picoseconds (ps), and the operating pulse width or range of a femtosecond laser is on the order of femtoseconds (fs).

[0071] For example, the operating pulse width of a nanosecond laser can range from 1 ns to 100 ns, and the single pulse energy is greater than 1 mJ; the operating pulse width of a picosecond laser can range from 1 ps to 200 ps, ​​and the single pulse energy is greater than 1 microjoule (uJ); the operating pulse width of a femtosecond laser can range from 1 fs to 100 fs, and the single pulse energy is greater than 1 nanojoule (nJ).

[0072] In the above embodiments, the laser generating module may include a nanosecond laser, a picosecond laser, and / or a femtosecond laser. This provides a wide range of laser options for the laser generating module, thereby improving the applicability of the root canal irrigation equipment.

[0073] In some embodiments, the working tool 130 is used to focus the received laser beam onto the irrigation fluid in the pulp chamber using a target focusing method.

[0074] The target focusing method can include one of the following: contact with the irrigation fluid in the pulp chamber, or no contact with the irrigation fluid in the pulp chamber.

[0075] Here, the working tool 130 can be used to focus the received laser beam into the rinsing fluid in the pulp cavity, either by contact with the rinsing fluid in the pulp cavity or by not contacting the rinsing fluid in the pulp cavity.

[0076] Contact with the rinsing fluid in the pulp chamber refers to at least a portion of the working tool 130 coming into contact with the rinsing fluid in the pulp chamber during root canal irrigation. For example, the operator can insert the laser output end of the working tool 130 into the rinsing fluid in the pulp chamber so that the working tool 130 can focus the received laser beam into the rinsing fluid in the pulp chamber through the laser output end.

[0077] "No contact with the rinsing fluid in the pulp chamber" means that the working tool 130 is located outside the rinsing fluid in the pulp chamber during root canal irrigation. The working tool 130 can focus the received laser beam into the rinsing fluid in the pulp chamber without contact with it; that is, the working tool 130 can achieve focusing within the rinsing fluid in the pulp chamber through far-field focusing of the laser beam. For example, the operator can place the working tool 130 outside the rinsing fluid in the pulp chamber, and the working tool 130 can focus the received laser beam into the rinsing fluid in the pulp chamber without contact with it.

[0078] In the above embodiments, during root canal irrigation, the received laser beam can be focused onto the irrigation fluid in the pulp chamber, either by contact with the fluid or without contact. This allows the operator to either insert the instrument into the irrigation fluid or not, improving operational flexibility and convenience, and reducing the difficulty of instrument operation in complex and confined oral spaces.

[0079] In some embodiments, as shown in FIG6, the working tool 130 includes an optical focusing component 131; the optical focusing component 131 is used to focus the received laser beam into the rinsing fluid in the pulp cavity in a non-contact manner.

[0080] The optical focusing component 131 may include any suitable component capable of focusing the laser. For example, the optical focusing component 131 may include a focusing lens.

[0081] Understandably, during root canal irrigation, the operator can hold the working tool 130 and place it at a suitable distance from the irrigation fluid in the pulp chamber. By focusing the laser beam into the irrigation fluid in the pulp chamber without contact with it, the root canal irrigation can be achieved through laser-induced photo-breakdown effect.

[0082] In some embodiments, the working tool 130 may also include an optical beam expander and collimator, which is used to expand and collimate the received laser beam and transmit the expanded and collimated laser beam to an optical focusing component 131, which focuses the expanded and collimated laser beam into the rinsing fluid in the pulp cavity.

[0083] In the above embodiments, the working tool uses an optical focusing component to focus the received laser beam, or uses an optical beam expander and collimator and an optical focusing component to sequentially expand, collimate and focus the received laser beam. This allows for simple and accurate focusing of the received laser beam into the rinsing fluid in the pulp cavity without contact with the fluid, improving operational flexibility and convenience. Furthermore, since the working tool does not need to be inserted into the rinsing fluid in the pulp cavity during root canal irrigation, the safety risks caused by instrument breakage or dislodgement are reduced.

[0084] In some embodiments, the long axis of the working tool 130 extends along a first direction, and an optical path transmission structure is provided inside the working tool 130 for outputting the received laser beam along the first direction. For example, the optical path transmission structure includes an optical focusing component, as shown in FIG7, in which the laser beam is focused along the first direction X into the rinsing fluid 21 in the pulp cavity 20 by the optical focusing component 131 within the working tool 130. Alternatively, the optical path transmission structure includes an optical beam expanding and collimating component and an optical focusing component 131, in which the laser beam is expanded, collimated, and focused sequentially by the optical beam expanding and collimating component and the optical focusing component 131 within the working tool 130, and then focused along the first direction X into the rinsing fluid in the pulp cavity.

[0085] In some embodiments, the long axis of the working tool 130 extends along a first direction, and an optical path transmission structure is provided inside the working tool 130. The optical path transmission structure is used to output the received laser beam along a second direction, which intersects with the first direction. For example, the optical path transmission structure includes a reflector and an optical focusing component. As shown in FIG8, at the front end of the working tool 130, a reflector 133 placed at a set angle (e.g., 30°, 45°, or 60°) with respect to the first direction X changes the transmission of the laser beam from the first direction X to the second direction Y, and the optical focusing component 131 focuses the laser beam onto the rinsing fluid 21 in the pulp cavity 20. For example, the optical path transmission structure includes a concave reflector, which is used to change the transmission direction of the laser beam projected onto the concave reflector along the first direction X to the second direction Y, and at the same time focus the laser beam. As shown in Figure 9, the laser beam is changed from transmission along the first direction X to transmission along the second direction Y by the concave reflector 134 set inside the working tool 130, and the laser beam is focused into the rinsing fluid 21 in the pulp cavity 20.

[0086] In some embodiments, the root canal irrigation device 100 further includes a laser aiming element; the laser aiming element is used to output visible light coaxial with the laser beam to aim at the focal point of the laser beam using the visible light.

[0087] Here, the laser aiming device can be installed in the host machine 110, the light guide 120, or the working hand 130. This embodiment does not limit the specific installation.

[0088] For example, the laser aiming device can be installed inside the laser generating module in the host machine 110. Alternatively, if the light guide 120 is a light guide articulated arm, the laser aiming device can be installed at one joint position of the light guide articulated arm.

[0089] Visible light can include, but is not limited to, at least one of red light, green light, and blue light.

[0090] Understandably, the visible light output by the laser aiming device is coaxial with the laser beam. This visible light can reach the focal point of the laser beam along the light transmission path of the laser beam. Thus, before the working handpiece 130 outputs the laser beam, the focal point of the laser beam can be aimed using this visible light. This allows the laser beam to be focused at a suitable position within the rinsing fluid in the pulp cavity when the working handpiece 130 is in a non-contact manner with the rinsing fluid in the pulp cavity. This can improve the rinsing effect and reduce patient pain caused by an unsuitable focal point of the laser beam.

[0091] In some embodiments, as shown in FIG10, the working tool 130 has an optical fiber head 132; the optical fiber head 132 is used to focus the received laser beam onto the laser output end 132a of the optical fiber head 132 by contacting the rinsing fluid in the pulp cavity, so as to form a focal point in the rinsing fluid in the pulp cavity.

[0092] Here, during the root canal irrigation process, the operator can hold the working tool 130 and place the fiber optic head 132 of the working tool 130 at a suitable position in the irrigation fluid in the pulp cavity, so that the laser output end of the fiber optic head 132 is located in the irrigation fluid. In this way, by contacting the irrigation fluid in the pulp cavity, the laser beam is focused into the irrigation fluid, so as to achieve root canal irrigation through the laser-induced photo-breakdown effect.

[0093] In some embodiments, as shown in FIG11, the root canal irrigation device 100 further includes a control unit 140. The control unit 140 is communicatively connected to a control port (not shown) on the host machine 110, and is used to control the laser generating module to generate a laser beam through the control port.

[0094] Here, the control element 140 may include, but is not limited to, at least one of the following: a control foot pedal, a control button, and a control light switch.

[0095] The control unit 140 and the control connection port on the host machine 110 can communicate in any suitable manner, and there are no limitations. In some embodiments, the control connection port may include, but is not limited to, at least one of the following communication modules: wireless communication module and wired communication module. For example, the wireless communication module may include, but is not limited to, a Bluetooth communication module, a wireless local area network communication module, a 4th generation mobile communication (4G) module, or a 5th generation mobile communication (5G) module, etc., and the wired communication module may include, but is not limited to, an Ethernet communication interface, a Universal Serial Bus (USB) interface, a High Definition Multimedia Interface (HDMI) interface, a Micro SD card slot, an OTG (On-The-Go) connection port for data exchange between different devices, etc.

[0096] The control unit 140 may be implemented by logic circuits or by at least one of a microcontroller, embedded processor chip, digital signal processor (DSP) chip, or field programmable gate array (FPGA).

[0097] In some embodiments, as shown in FIG12, the control unit 140 includes a control pedal 141; the control pedal 141 is used to control the laser generating module to generate a laser beam through the control interface when the first pedal position is engaged.

[0098] Here, the control pedal 141 can have at least one pedal position.

[0099] For example, after setting the root canal irrigation program and placing the tools in the appropriate position, the operator can control the laser generator module to produce a laser beam by pressing the control foot pedal to the first position, thereby starting the irrigation of the root canal.

[0100] In some embodiments, the root canal irrigation device 100 further includes a laser aiming element; the control foot pedal 141 is also used to control the laser aiming element to output visible light coaxial with the laser beam through the control port when in the second pedal position, so as to aim at the focal point of the laser beam using visible light.

[0101] Here, the control pedal 141 can have at least two pedaling positions. The second pedaling position is different from the first pedaling position.

[0102] After setting the root canal irrigation program, the operator can control the laser aiming device to output visible light coaxial with the laser beam by pressing the control foot pedal to the second pedal position. The operator can then adjust the position and / or angle of the handpiece according to the visible light to aim the laser beam at a suitable location in the irrigation fluid within the pulp chamber. Next, the operator can press the control foot pedal to the first pedal position to control the laser generating module to generate the laser beam, thereby starting the root canal irrigation.

[0103] In some implementations, the operator can press the control foot pedal to the first pedal position, which can then control the laser generating module to produce a laser beam. Simultaneously, the control foot pedal can control the laser aiming element to output visible light coaxial with the laser beam. In this way, when the laser generating module is working, the visible light can be kept on throughout the process. This allows the operator to better guide the operation of the working tool based on the visible light in real time during root canal irrigation, so as to focus the laser beam at a precise position and improve the accuracy of the operation.

[0104] The first and second pedal positions can be set by those skilled in the art according to actual conditions, and this disclosure does not limit them. For example, the first pedal position can be the position corresponding to fully depressing the pedal, and the second pedal position can be the position corresponding to half-depressing the pedal.

[0105] In this way, by controlling the two pedal positions, the laser aiming component outputs visible light coaxial with the laser beam, and the laser generating module generates the laser beam, respectively. This improves the aiming operation of the laser beam focus point and the convenience of the irrigation operation during root canal irrigation, making it easier for clinical operation.

[0106] In some embodiments, the working host 110 is further provided with a pumping device and a reservoir; the pumping device is used to deliver the rinsing fluid in the reservoir to the pulp chamber during the process of rinsing the root canal using the photo-induced breakdown effect of the working hand.

[0107] In some embodiments, there may be multiple reservoirs, and the types of rinsing fluid stored in each reservoir may be the same or different. The pumping device is used to deliver the rinsing fluid from each reservoir to the pulp chamber according to a preset root canal rinsing program during the process of rinsing the root canal using the photo-induced breakdown effect with the working tool.

[0108] In some implementations, the pumping device may include a pump-push positive pressure liquid supply system.

[0109] The following describes the laser-induced plasma cavitation activated root canal irrigation device provided in this disclosure embodiment, using practical application scenarios as examples. It is understood that the root canal irrigation process also has a certain disinfecting effect on the root canal; therefore, this root canal irrigation device can also be used as a root canal irrigation and disinfection device.

[0110] This disclosure presents a laser-induced plasma cavitation activated root canal irrigation device. As shown in Figures 13 and 14, the root canal irrigation device 100 consists of a main unit 110, a light-guiding articulated arm 121, a working handpiece 130, and a control foot pedal 141. The main unit 110 integrates a laser generating module 111, a power control module 112, a working parameter adjustment panel 113, a cooling device 114, a pump-push positive pressure liquid supply system 115, and a liquid storage tank 116. The light-guiding articulated arm 121 integrates an optical reflection transmission system and a coaxial visible and red light aiming system. The working handpiece 130 integrates an optical beam expander and collimator and an optical focusing component. The laser is generated in the laser generating module 111 within the main unit 110, and transmitted from the laser generating module 111 to the working handpiece 130 via the light-guiding articulated arm 121, and finally transmitted to the irrigation fluid in the pulp chamber of the surgical area via the working handpiece 130. The control foot pedal 141 includes a laser working mode lock button, a spray switch button, and a foot pedal. The foot pedal has a half-press position (corresponding to the second pressing position in the aforementioned embodiment) and a full-press position (corresponding to the first pressing position in the aforementioned embodiment). The half-press position is used to activate the visible light for aiming, and the full-press position is used to activate the laser and enter the working mode for laser activation and rinsing. Before the device operates, root canal rinsing fluid is injected into the root canal. The working tool 130 is placed outside the pulp chamber of the affected tooth. The laser beam is focused on the rinsing fluid in the pulp chamber by visible light aiming, and the laser is activated for irradiation. At the same time, the positive pressure pump supply system 115 continuously sprays rinsing fluid into the pulp chamber. The laser focus point is located in the rinsing fluid in the pulp chamber, generating a photo-induced breakdown effect and forming plasma in the rinsing fluid. The plasma generates shock waves and cavitation bubbles, activating the fluid to flush and clean the root canal, thereby enhancing the infection control effect of the root canal system during dental canal treatment. This root canal irrigation device can enhance the irrigation and disinfection of the root canals of affected teeth during root canal treatment, playing an important auxiliary role in improving infection control during root canal treatment.

[0111] The root canal irrigation device provided in this disclosure uses a nanosecond-level short-pulse laser with a power density exceeding the breakdown threshold of the irrigation fluid, generating a photo-induced breakdown effect. This effectively activates the irrigation fluid within the pulp chamber and root canals by forming plasma and cavitation bubbles within the liquid, thereby achieving root canal irrigation and disinfection. This helps improve infection control during root canal treatment and enables effective three-dimensional cleaning of the root canal system, thus enhancing the long-term efficacy of root canal treatment. Using this root canal irrigation device, instruments do not enter below the root canal orifice and can function within the pulp chamber without contacting the irrigation fluid, effectively irrigating, cleaning, and disinfecting the entire root canal system, significantly reducing the risk of instrument separation within the root canal.

[0112] In some embodiments, the host machine 110 adjusts the laser output parameters via the working parameter adjustment panel 113 and controls the electrical control system of the device via the power control module. The laser generating module 111 generates and outputs a laser beam, which is then transmitted via the light guide articulated arm 121 connected to the host machine 110. The cooling device 114 cools the laser generating module 111 via a water-cooling circulation system. The pump-pumped positive pressure liquid supply system 115 uses a positive pressure pump to transfer root canal rinsing liquid (such as distilled water, physiological saline, sodium hypochlorite solution, ethylenediaminetetraacetic acid (EDTA) solution, and / or chlorhexidine solution, etc.) from the reservoir 116 to the working tool via the liquid transfer system.

[0113] In some embodiments, the working parameter adjustment panel 113 on the host machine 110 includes a laser emergency stop button, a standby button, a ready button, a parameter adjustment display window and buttons, an indicator light switch button, a water volume adjustment button, and a storage tank program setting button. The laser emergency stop button is used to stop the operation of the laser generating module 111 in an emergency; the parameter adjustment display window and buttons are used to adjust the laser's energy output parameters (such as single-pulse energy, frequency, etc.); the indicator light switch button is used to turn the visible red indicator light coaxial with the laser beam on and off; the water volume adjustment button is used to adjust the fluid flow rate output by the pump-push positive pressure liquid supply system 115; the storage tank program setting button is used to set the operating storage tank 116; the standby button is used for confirmation after parameter adjustment is completed; and the ready button is used for final confirmation before laser emission.

[0114] In some embodiments, the reservoir 116 in the host machine 110 includes four independent reservoirs, all made of stainless steel. The four independent reservoirs are, in sequence, a cleaning tank, solution tank 1, solution tank 2, and solution tank 3. The cleaning tank contains distilled water for flushing and cleaning the transmission lines of the entire pump-push positive pressure fluid supply system 115. Solution tanks 1, 2, and 3 are used to store root canal irrigating solutions. For example, solution tanks 1, 2, and 3 can support the storage of three different root canal irrigating solutions.

[0115] The following describes the operation method of the laser-induced plasma cavitation activated root canal irrigation device provided in this embodiment. This root canal irrigation device can be operated by a physician or other personnel, and the operation method includes the following steps S301 to S311:

[0116] Step S301: Following the standard root canal treatment procedure, perform local anesthesia on the affected tooth, isolate the surgical area (e.g., rubber dam isolation), open the pulp chamber, locate and clear the root canal, and prepare and shape the root canal. After root canal preparation is complete, the laser activation and irrigation step can begin. Before laser activation and irrigation, use a syringe to fill the pulp chamber and root canal with root canal irrigation solution (the injected irrigation solution can be the same as the first irrigation solution in the root canal irrigation procedure, such as sodium hypochlorite solution).

[0117] Step S302: Connect the working tool to the light guide articulated arm and connect the transmission water pipe. Cover the working tool with its outer sleeve; the outer sleeve must be sterilized under high temperature and pressure before use.

[0118] Step S303: Connect the control foot pedal to the control foot pedal connection port on the host machine (corresponding to the control connection port in the aforementioned embodiment) via the control foot pedal connection cable.

[0119] Step S304: Unscrew the lid of the storage tank on top of the storage tank, add distilled water to the cleaning tank, add sodium hypochlorite solution to solution tank 1, add physiological saline to solution tank 2, and add 17% ethylenediaminetetraacetic acid (EDTA) solution to solution tank 3. After completing the liquid filling, tighten the lid of the storage tank.

[0120] Step S305: Turn on the power switch on the main unit, set the root canal irrigation program on the working parameter adjustment panel, and set the liquid flow rate pushed by the positive pressure pump.

[0121] For example, the root canal irrigation procedure can be: 30 seconds of laser-activated irrigation with sodium hypochlorite solution (using a positive pressure pump in reservoir 1), 30 seconds of laser-activated irrigation with saline solution (using a positive pressure pump in reservoir 2), 30 seconds of laser-activated irrigation with 17% EDTA solution (using a positive pressure pump in reservoir 3), and 30 seconds of laser-activated irrigation with saline solution (using a positive pressure pump in reservoir 2), for a total of 120 seconds for the entire root canal irrigation process.

[0122] Step S306: Start the pump push positive pressure liquid supply system to push the solution pump in the storage tank 1 to the spray nozzle of the working tool until the liquid is sprayed out from the spray nozzle.

[0123] Step S307: Set the single-pulse energy and frequency of the laser output on the working parameter adjustment panel. After setting, press the standby button, and then press the ready button. The laser activation rinsing procedure can then begin.

[0124] Step S308: The operator (e.g., a dentist) holds the working tool and places the tip of the tool above the access cavity of the tooth to be cleaned and disinfected in the patient's mouth. The foot pedal is partially depressed to output a visible red indicator light, which is used to confirm that the laser is focused in the center of the pulp chamber. At this point, the foot pedal is fully depressed to output the laser. The laser will focus within the fluid in the pulp chamber, producing a photo-induced breakdown effect and generating plasma. The plasma generates shock waves and cavitation bubbles, activating and oscillating the fluid within the pulp chamber and root canals, thus activating the root canal for irrigation and disinfection. The irrigation process ends after 30 seconds.

[0125] Step S309: After the positive pressure pump of the rinsing solution tank 2 pushes out the rinsing solution, the second cycle of rinsing begins. The first to fourth cycles of rinsing are completed in one go, and the total effective root canal laser activation rinsing time is 120 seconds.

[0126] Step S310: After completing all procedures of laser activation and rinsing, continue with subsequent root canal treatment steps (such as root canal drying and medication sealing or root canal filling). At this time, you can press the cleaning button on the control panel. Distilled water in the cleaning tank will be pumped out through the positive pressure supply system to clean the liquid delivery pipeline. Cleaning will stop after 30 seconds. The positive pressure supply system will then transmit compressed air into the liquid delivery pipeline to dry the pipeline. Drying will stop after 30 seconds.

[0127] Step S311: Remove the outer sleeve of the work tool and sterilize it under high temperature and pressure. Remove the work tool and wipe it with 75% alcohol for disinfection. Drain the liquid from the storage tank and clean it with distilled water. After drying, reinstall the tank.

[0128] The laser-induced plasma cavitation activated root canal irrigation device provided in this disclosure can perform laser-activated irrigation of the pulp chamber and root canal system of teeth undergoing root canal treatment. During the laser-activated irrigation process, the instrument box does not enter the root canal system below the root canal orifice, but is only positioned above the root canal orifice within the pulp chamber, thus effectively avoiding the risk of breakage caused by instruments entering the root canal. Furthermore, this root canal irrigation device utilizes the nanosecond pulse width output by the laser generation module and the high energy density laser focus point formed by the optical focusing system to generate a photo-induced breakdown effect in the liquid, generating plasma in the root canal irrigation liquid within the pulp chamber, and subsequently generating shock waves and cavitation bubble oscillations, effectively activating the liquid within the pulp chamber and root canals, thereby enabling good irrigation and disinfection of the pulp chamber and root canal system of teeth undergoing root canal treatment.

[0129] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0130] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0131] In the several embodiments provided in this disclosure, it should be understood that the disclosed device can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components may be combined, or integrated into another system, or some features may be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0132] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0133] In addition, each functional unit in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0134] The above description is merely an embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Industrial applicability

[0135] This disclosure provides a laser-induced plasma cavitation activated root canal irrigation device, comprising: a main unit, a light guide, and a handpiece. The main unit includes a laser generating module, and the light guide connects the laser generating module and the handpiece. The laser generating module generates a laser beam; the light guide transmits the laser beam to the handpiece; and the handpiece focuses the received laser beam onto the irrigation fluid in the pulp chamber. The laser energy induces a photo-induced breakdown effect in the irrigation fluid within the pulp chamber and induces plasma cavitation to activate the irrigation fluid in the root canal, thereby irrigating the root canal. Using the root canal irrigation device provided by this disclosure, on the one hand, the root canals can be more thoroughly irrigated, improving the effectiveness of irrigation and disinfection, reducing the probability of infection during root canal treatment, and thus increasing the success rate of root canal treatment; on the other hand, it improves the flexibility and convenience of operation, reducing the difficulty of instrument operation in complex and confined oral spaces.

Claims

1. A laser-induced plasma cavitation activated root canal irrigation device, comprising: The system comprises a main unit, a light guide, and a working handpiece. The main unit contains a laser generating module, and the light guide connects the laser generating module and the working handpiece. The laser generating module is used to generate a laser beam; The light guide is used to transmit the laser beam generated by the laser generating module to the working hand; The working tool is used to focus the received laser beam onto the rinsing fluid in the pulp cavity, and use the laser energy to generate a photo-induced breakdown effect in the rinsing fluid in the pulp cavity, and induce plasma cavitation to activate the rinsing fluid in the root canal, so as to irrigate the root canal.

2. The root canal irrigation device of claim 1, wherein, The laser beam generated by the laser generating module forms a focal point in the irrigation fluid in the pulp cavity via the light guide and the working tool. The power density of the focal point is greater than the density threshold, which is the breakdown threshold of the irrigation fluid.

3. The root canal irrigation device of claim 1, wherein, The laser generating module includes a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

4. The root canal irrigation device of claim 1, wherein, The working tool is used to focus the received laser beam into the irrigation fluid in the pulp cavity using a target focusing method; The target focusing method includes one of the following: contact with the rinsing fluid in the pulp cavity, or no contact with the rinsing fluid in the pulp cavity.

5. The root canal irrigation device of claim 4, wherein, The working tool includes an optical focusing component; The optical focusing component is used to focus the received laser beam onto the rinsing fluid in the pulp cavity in a non-contact manner.

6. The root canal irrigation device of claim 5, wherein, The root canal irrigation device also includes a laser aiming device; The laser aiming device is used to output visible light coaxial with the laser beam, so as to aim at the focal point of the laser beam using the visible light.

7. The root canal irrigation device of claim 4, wherein, The working tool has an optical fiber head; The fiber optic head is used to focus the received laser beam onto the laser output end of the fiber optic head by contacting the rinsing fluid in the pulp cavity, so as to form a focal point in the rinsing fluid in the pulp cavity.

8. The root canal irrigation device according to any one of claims 1 to 7, wherein, The root canal irrigation device also includes control components; The control unit is communicatively connected to the control port on the host computer and is used to control the laser generating module to generate a laser beam through the control port.

9. The root canal irrigation device of claim 8, wherein, The control includes a foot pedal; The control foot pedal is used to control the laser generating module to generate a laser beam through the control connection port when the pedal is in the first pedal position.

10. The root canal irrigation apparatus according to claim 9, wherein, The root canal irrigation device also includes a laser aiming device; The control foot pedal is also used to control the laser aiming device to output visible light coaxial with the laser beam when it is in the second pedal position, so as to aim at the focal point of the laser beam using the visible light.

11. The root canal irrigation apparatus according to any one of claims 1 to 7, wherein, The host machine is also equipped with a pump and a storage tank. The pumping device is used to deliver the rinsing fluid in the reservoir to the pulp chamber during the process of the working tool rinsing the root canal using the photo-induced breakdown effect.

Images