Root canal flushing equipment for laser-induced plasma cavitation activation

Abstract

The embodiment of the invention provides laser-induced plasma cavitation activated root canal flushing equipment which comprises a working host, a light guide part and a working hand tool, a laser generation module is arranged in the working host, and the light guide part is connected with the laser generation module and the working hand tool; the laser generation module is used for generating laser beams; the light guide part is used for transmitting the laser beam generated by the laser generation module to the working hand tool; the working hand tool is used for focusing the received laser beam into the flushing fluid in the dental pulp cavity, generating a light-induced breakdown effect in the flushing fluid in the dental pulp cavity by utilizing laser energy, and inducing plasma cavitation to activate the flushing fluid in the root canal so as to flush the root canal.

Description

Technical Field

[0001] The present disclosure relates to, but is not limited to, the technical field of electronic medical devices, and in particular to a laser-induced plasma cavitation-activated root canal irrigation device. Background Art

[0002] Pulp and periapical diseases are common and frequently occurring diseases in dental clinics. Currently, the need to preserve natural teeth is mainly met through root canal therapy and crown restoration. Root canal therapy includes pulp opening, root canal dredging and preparation, root canal irrigation and disinfection, root canal filling and other steps. The key to successful root canal treatment is to effectively control the infection in the root canal system during the operation and prevent it from being infected again. Root canal irrigation is an important part of infection control in root canal treatment. The entire root canal system can be rinsed with root canal irrigation fluid to remove soft and hard tissue debris, infectious bacterial biofilms and smear layers produced during the preparation process. In the root canal irrigation equipment in the related art, the irrigation fluid does not sufficiently rinse the root canal, resulting in insufficient effect of root canal irrigation and disinfection, and the operation of the operating instruments in the equipment is not flexible and convenient enough. Summary of the invention

[0003] In view of this, the embodiments of the present disclosure provide at least one laser-induced plasma cavitation-activated root canal flushing device, which can more fully flush the root canal to improve the effect of root canal flushing and disinfection, reduce the probability of infection during root canal treatment, and thus improve the success rate of root canal treatment. In addition, during the root canal flushing process, the working position of the working tool is not restricted, thereby improving the flexibility and convenience of operation and reducing the difficulty of operating the instrument in a complex and narrow oral space.

[0004] The technical solution of the embodiment of the present disclosure is implemented as follows: The present disclosure provides a laser-induced plasma cavitation activated root canal irrigation device, comprising: A working host, a light guide and a working tool, wherein the working host is provided with a laser generating module, and the light guide connects the laser generating module and the working tool; wherein: 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 flushing fluid in the pulp cavity, use the laser energy to produce a photo-breakdown effect in the flushing fluid in the pulp cavity, and induce plasma cavitation to activate the flushing fluid in the root canal, so as to flush the root canal.

[0005] In some embodiments, the laser beam generated by the laser generating module passes through the light guide and the working tool to form a focusing point in the flushing fluid in the pulp cavity, and the power density of the focusing point is greater than a density threshold, which is a breakdown threshold of the flushing fluid.

[0006] In some embodiments, the laser generating module includes a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

[0007] In some embodiments, the working tool is used to focus the received laser beam into the flushing fluid in the pulp cavity using a target focusing method; the target focusing method includes one of the following: contact with the flushing fluid in the pulp cavity, and no contact with the flushing fluid in the pulp cavity.

[0008] In some embodiments, the working tool includes an optical focusing component; the optical focusing component is used to focus the received laser beam into the flushing fluid in the dental pulp cavity in a non-contact manner.

[0009] In some embodiments, the root canal flushing device further comprises a laser aiming device; the laser aiming device is used to output visible light coaxial with the laser beam, so as to aim the focal point of the laser beam using the visible light.

[0010] In some embodiments, the working tool has a fiber optic head; the fiber optic head is used to focus the received laser beam on the laser output end of the fiber optic head by contacting the flushing fluid in the pulp cavity to form a focusing point in the flushing fluid in the pulp cavity.

[0011] In some embodiments, the root canal flushing device further includes a control component; the control component is communicatively connected to a control connection port on the working host, and is used to control the laser generating module to generate a laser beam through the control connection port.

[0012] In some embodiments, the control member includes a control pedal; the control pedal is used to control the laser generating module to generate a laser beam through the control connection port when the control pedal is in the first pedaling gear position.

[0013] In some embodiments, the root canal flushing device also includes a laser aiming device; the control pedal is also used to control the laser aiming device to output visible light coaxial with the laser beam through the control connection port when in the second pedaling gear position, so as to use the visible light to aim at the focal point of the laser beam.

[0014] In some embodiments, a pumping device and a liquid storage tank are also provided in the working host; the pumping device is used to transport the flushing liquid in the liquid storage tank to the dental pulp cavity when the working tool flushes the root canal using the photolysis effect.

[0015] The laser-induced plasma cavitation-activated root canal flushing device provided in the embodiment of the present disclosure includes a working main body, a light guide and a working hand. The working main body is provided with a laser generating module, and the light guide connects the laser generating module and the working hand; wherein 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 hand is used to focus the received laser beam into the flushing fluid in the pulp cavity, utilize the laser energy to generate a photo-breakdown effect in the flushing fluid in the pulp cavity, and induce plasma cavitation to activate the flushing fluid in the root canal, so as to flush the root canal. On the one hand, the root canal flushing device activates the flushing fluid in the root canal by inducing plasma cavitation using the photobreakdown effect, which can enhance the oscillation effect of the flushing fluid in the root canal, so that the root canal can be flushed more fully, so as to improve the effect of root canal flushing and disinfection, reduce the probability of infection during root canal treatment, and thus improve the success rate of root canal treatment; on the other hand, because when performing root canal flushing, the laser beam is focused on the flushing fluid in the pulp cavity, and a high-power density energy convergence area is formed at the focal point in the flushing fluid to instantly break through the flushing fluid, and the laser energy used to generate the photobreakdown effect is usually high and the energy is not completely absorbed by the liquid, and can penetrate the surface layer of the flushing fluid in the pulp cavity. The power density reached at the focus can cause the photobreakdown effect. Therefore, during the root canal flushing process, the working hand tool does not need to be extended into the flushing fluid in the pulp cavity, and the laser energy can reach the focal point in the flushing fluid, so that the working position of the working hand tool is not restricted during the root canal flushing operation, thereby improving the flexibility and convenience of the operation and reducing the difficulty of operating the instrument in a complex and narrow oral space.

[0016] 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 the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used to illustrate the technical solutions of the present disclosure together with the specification.

[0018] Figure 1 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 1 ; Figure 2 A schematic diagram of a working hand tool provided in an embodiment of the present disclosure focusing a laser beam into an irrigation liquid in a dental pulp cavity; Figure 3 A schematic diagram of a working hand tool provided in an embodiment of the present disclosure focusing a laser beam into a dental pulp cavity to generate plasma and then forming cavitation bubbles; Figure 4 A schematic diagram of the expansion and quenching of cavitation bubbles formed by focusing a laser beam on a dental pulp cavity provided by a working hand tool according to an embodiment of the present disclosure; Figure 5 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 2 ; Figure 6 A schematic diagram of the structure of a working tool provided in an embodiment of the present disclosure Figure 1 ; Figure 7 A schematic diagram of the structure of a working tool provided in an embodiment of the present disclosure Figure 2 ; Figure 8 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 3 ; Fig. 9 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 4 ; Fig.10 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 5 ; Fig.11 A schematic block diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure are further elaborated in detail below in conjunction with the drawings and embodiments. The described embodiments should not be regarded as limiting the present disclosure. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0020] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be 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.

[0021] In the description of the present disclosure, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. The terms "first / second / third" involved are merely used to distinguish similar objects, and do not represent a specific order for the objects. It is understandable that "first / second / third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein are only for the purpose of describing the present disclosure and are not intended to limit the present disclosure.

[0023] The terms "disposed" and "connected" herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a detachable connection, or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0025] The disclosed embodiment provides a laser-induced plasma cavitation-activated root canal flushing device, which can more fully flush the root canal to improve the effect of root canal flushing and disinfection, reduce the probability of infection during root canal treatment, and thus improve the success rate of root canal treatment. In addition, during the root canal flushing process, the working position of the working tool is not restricted, thereby improving the flexibility and convenience of operation and reducing the difficulty of operating the instrument in a complex and narrow oral space. Figure 1 A schematic diagram of the composition structure of a root canal flushing device provided in an embodiment of the present disclosure Figure 1 .like Figure 1 As shown, the root canal irrigation device 100 comprises: A working host 110, a light guide 120 and a working tool 130. The working host 110 is provided with a laser generating module (not shown in the figure). The light guide 120 connects the laser generating module and the working tool 130; wherein: The laser generating module is used for generating a laser beam; The light guide 120 is used to transmit the laser beam generated by the laser generating module to the working tool 130; The working tool 130 is used to focus the received laser beam into the irrigation fluid in the pulp cavity, use the laser energy to generate a photoinduced breakdown effect (Laser Induced Breakdown) in the irrigation fluid in the pulp cavity, and induce plasma cavitation to activate the irrigation fluid in the root canal, so as to irrigate the root canal.

[0026] Here, a laser generating module is disposed in the working host 110, wherein the laser generating module can generate any suitable laser that can produce a photo-induced breakdown effect in the flushing fluid in the dental pulp cavity.

[0027] It can be understood that the laser-induced plasma cavitation activated root canal irrigation device provided in the embodiment of the present disclosure refers to a root canal irrigation device based on laser-induced plasma cavitation to activate the irrigation fluid, and the root canal irrigation device can use the photo-breakdown effect to form a laser-induced cavitation effect in the irrigation fluid in the pulp cavity to activate the irrigation fluid. Laser-induced cavitation refers to when the power density of the laser exceeds the breakdown threshold of the irrigation fluid, the irrigation fluid is ionized and broken down, and plasma is generated in the irrigation fluid. The plasma cavity expands rapidly outward, generates and radiates irrigation waves in the irrigation fluid, and forms cavitation bubbles. The moment of cavitation bubble expansion will generate high-pressure impact oscillation in the irrigation liquid. At the same time, at the moment of cavitation bubble quenching, negative pressure will be instantly generated in the irrigation liquid to reach the saturated vapor pressure of the irrigation liquid at room temperature, thereby inducing a large number of small cavitation bubbles in the irrigation liquid; the high temperature and high pressure at the moment of cavitation bubble quenching will also generate plasma again, further causing the cavitation bubble to expand and quench again. This repeated oscillation can produce an activation effect on the irrigation liquid through the expansion, oscillation and quenching of the cavitation bubble. Compared with the root canal activation irrigation technology in the related art, in which the physical state of the irrigation liquid activation process changes from liquid to gas, the root canal irrigation device provided by the embodiment of the present disclosure utilizes the photoinduced breakdown effect. During the activation process of the irrigation liquid, the physical state of the irrigation liquid changes from liquid to plasma. The irrigation waves and cavitation bubbles formed by the plasma can exert better oscillation and activation effects on the irrigation liquid, thereby making the irrigation liquid produce a stronger mechanical movement effect of flushing.

[0028] like Figure 2 As shown, the working tool 130 can focus the laser beam into the flushing liquid 21 in the pulp cavity 20, forming a high power density energy focusing area 22 at the focusing point, and the flushing liquid in the energy focusing area 22 is ionized and broken down under the action of the laser energy to generate plasma. Figure 3As shown, after the plasma is generated, a plasma cavity is formed in the flushing liquid, which expands outward rapidly, generates and radiates flushing waves in the flushing liquid 21, and forms cavitation bubbles 23. The expansion of the cavitation bubbles 23 instantly generates high-pressure shock oscillations in the flushing liquid. Figure 4 As shown, when the cavitation bubble 23 expands and quenches, a negative pressure is instantly generated in the flushing liquid 21, reaching the saturated vapor pressure of the flushing liquid at room temperature, thereby inducing a large number of small cavitation bubbles 24 in the flushing liquid. In this way, an activation effect can be produced on the flushing liquid.

[0029] In some embodiments, the working host 110 may also be provided with at least one of a power control module, a working parameter adjustment panel, a cooling device, a pumping device, and a liquid storage tank. Among them, 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 flushing program, the single pulse energy and / or frequency of the laser beam output by the laser generating module, etc. The cooling device can be used to cool down each module in the working host. The liquid storage tank is used to store the flushing liquid, and the pumping device is used to transport the flushing liquid in the liquid storage tank to the pulp cavity during the root canal flushing process.

[0030] The flushing liquid can be any suitable root canal flushing liquid determined according to the actual situation of the dental pulp cavity to be flushed in the clinic, and the embodiments of the present disclosure are not limited to this. For example, the flushing liquid 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 flushing liquid can play a disinfecting or chelating role in the root canal through physical flushing and chemical action, and thus achieve the effect of cleaning and disinfecting the entire root canal system.

[0031] The light guide 120 may be any suitable component that can be used for light beam transmission, and the embodiments of the present disclosure are not limited thereto. For example, the light guide 120 may include but is not limited to at least one of a light guide optical fiber, a light guide joint arm, and the like.

[0032] In some embodiments, Figure 1 As shown, the light guide 120 includes a light guide joint arm, in which an optical reflection transmission system is built-in, and the light guide joint arm can transmit the laser from the laser generating module in the working host 110 to the working hand 130 through the built-in optical reflection transmission system. The light guide joint arm can have multiple joints, for example, the number of joints of the light guide joint arm can be 2, 3, 5, 8 or 10, etc.

[0033] In some embodiments, Figure 5As shown, the light guide 120 includes a light guide fiber 122 . The laser beam output by the laser generating module in the working host 110 can enter the light guide fiber 122 through a coupling mirror and be transmitted into the working tool 130 through the light guide fiber 122 .

[0034] The working hand tool 130 may be any suitable instrument that is convenient for hand-held operation, and can focus the laser beam received from the light guide 120 into the rinsing liquid in the dental pulp cavity. An operator (e.g., a doctor) may hold the working hand tool 130 to focus the laser beam into the rinsing liquid in the dental pulp cavity to perform root canal rinsing on the patient's teeth. For example, the working hand tool may be a pen-shaped working handle.

[0035] It should be noted that the embodiment of the present disclosure does not limit the transmission direction of the laser in the working tool 130. During implementation, those skilled in the art can design a suitable transmission direction for the transmission of the laser in the working tool 130 according to actual conditions to facilitate the operation of medical staff during root canal flushing.

[0036] The laser-induced plasma cavitation-activated root canal flushing device provided in the embodiment of the present disclosure includes a working main body, a light guide and a working hand. The working main body is provided with a laser generating module, and the light guide connects the laser generating module and the working hand; wherein 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 hand is used to focus the received laser beam into the flushing fluid in the pulp cavity, utilize the laser energy to generate a photo-breakdown effect in the flushing fluid in the pulp cavity, and induce plasma cavitation to activate the flushing fluid in the root canal, so as to flush the root canal. On the one hand, the root canal flushing device activates the flushing fluid in the root canal by inducing plasma cavitation using the photobreakdown effect, which can enhance the oscillation effect of the flushing fluid in the root canal, so that the root canal can be flushed more fully, so as to improve the effect of root canal flushing and disinfection, reduce the probability of infection during root canal treatment, and thus improve the success rate of root canal treatment; on the other hand, because when performing root canal flushing, the laser beam is focused on the flushing fluid in the pulp cavity, and a high-power density energy convergence area is formed at the focal point in the flushing fluid to instantly break through the flushing fluid, and the laser energy used to generate the photobreakdown effect is usually high and the energy is not completely absorbed by the liquid, and can penetrate the surface layer of the flushing fluid in the pulp cavity. The power density reached at the focus can cause the photobreakdown effect. Therefore, during the root canal flushing process, the working hand tool does not need to be extended into the flushing fluid in the pulp cavity, and the laser energy can reach the focal point in the flushing fluid, so that the working position of the working hand tool is not restricted during the root canal flushing operation, thereby improving the flexibility and convenience of the operation and reducing the difficulty of operating the instrument in a complex and narrow oral space.

[0037] In some embodiments, the laser beam generated by the laser generating module forms a focal point in the flushing fluid in the pulp cavity through the light guide 120 and the working tool 130, and the power density of the focal point is greater than the density threshold, which is the breakdown threshold of the flushing fluid.

[0038] Here, the breakdown threshold of the flushing liquid may be determined according to the flushing liquid actually used, and the embodiments of the present disclosure are not limited to this.

[0039] For example, the breakdown threshold can be , ,or wait.

[0040] During implementation, the working wavelength range, pulse width range, single pulse energy, etc. of the laser generated by the laser generating module can be determined according to actual conditions, and the power density of the focal point of the laser beam output by the working hand tool 130 can be greater than the breakdown threshold of the flushing liquid. The embodiments of the present disclosure are not limited to this. For example, the laser generating module can generate ultraviolet laser, visible laser and / or infrared laser, etc., and the generated laser only needs to be able to make the power density of the focal point of the laser beam output by the working hand tool greater than the breakdown threshold of the flushing liquid.

[0041] In some embodiments, the pulse width of the laser generated by the laser generating module may be less than 10 nanoseconds (ns). By using the pulsed laser, a high power density energy convergence area is formed at the focal point through beam expansion and collimation or direct beam focusing, which can instantly break through the liquid to generate luminous plasma, and then instantly generate gasification cavitation in the liquid under high temperature and high pressure.

[0042] In some embodiments, the laser generated by the laser generating module may have an operating wavelength of 1064 nm, a pulse width ranging from 6 ns to 8 ns, and a single pulse energy ranging from 100 mJ to 300 mJ.

[0043] In some embodiments, the laser generating module may include a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

[0044] It is understandable that the working pulse width or working pulse width range of a nanosecond laser is on the order of nanoseconds, the working pulse width or working pulse width range of a picosecond laser is on the order of picoseconds (ps), and the working pulse width or working pulse width range of a femtosecond laser is on the order of femtoseconds (fs).

[0045] For example, the operating pulse width range of a nanosecond laser can be 1ns to 100ns, and the single pulse energy is greater than 1mJ; the operating pulse width range of a picosecond laser can be 1ps to 200ps, and the single pulse energy is greater than 1 microjoule (uJ); the operating pulse width range of a femtosecond laser can be 1fs to 100fs, and the single pulse energy is greater than 1 nanojoule (nJ).

[0046] In the above embodiments, the laser generating module may include a nanosecond laser, a picosecond laser, and / or a femtosecond laser. Thus, the lasers that can be used in the laser generating module have a wide range of selectivity, thereby increasing the versatility of application of the root canal flushing device.

[0047] In some embodiments, the working tool 130 is used to focus the received laser beam into the irrigation fluid in the dental pulp cavity by using a target focusing method.

[0048] The target focusing mode may include one of the following: contacting with the irrigation fluid in the pulp chamber, and not contacting with the irrigation fluid in the pulp chamber.

[0049] Here, the working tool 130 can be used to focus the received laser beam into the rinsing liquid in the pulp cavity in a manner of contacting with the rinsing liquid in the pulp cavity or in a manner of not contacting with the rinsing liquid in the pulp cavity.

[0050] The contact with the flushing liquid in the pulp cavity means that at least a portion of the working hand tool 130 is in contact with the flushing liquid in the pulp cavity during the root canal flushing process. For example, the operator can extend the laser output end of the working hand tool 130 into the flushing liquid in the pulp cavity, so that the working hand tool 130 focuses the received laser beam into the flushing liquid in the pulp cavity through the laser output end.

[0051] No contact with the flushing liquid in the pulp cavity means that during the root canal flushing process, the working hand tool 130 is located outside the flushing liquid in the pulp cavity. The working hand tool 130 can focus the received laser beam into the flushing liquid in the pulp cavity in a manner that is not in contact with the flushing liquid in the pulp cavity, that is, the working hand tool 130 can complete focusing in the flushing liquid in the pulp cavity by far-field focusing of the laser beam. For example, the operator can place the working hand tool 130 outside the flushing liquid in the pulp cavity, and the working hand tool 130 can focus the received laser beam into the flushing liquid in the pulp cavity in a manner that is not in contact with the flushing liquid in the pulp cavity.

[0052] In the above embodiment, during the root canal flushing process, the received laser beam can be focused into the flushing liquid in the pulp cavity by contacting the flushing liquid in the pulp cavity or by not contacting the flushing liquid in the pulp cavity. In this way, when the operator operates the working hand tool to flush the root canal, the working hand tool can be inserted into the flushing liquid in the pulp cavity or not, thereby improving the flexibility and convenience of the operation and reducing the difficulty of operating the instrument in a complex and narrow oral space.

[0053] In some embodiments, Figure 6 As shown, 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 flushing fluid in the pulp cavity in a non-contact manner.

[0054] 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.

[0055] It can be understood that during the root canal flushing process, the operator can hold the working tool 130, place the working tool 130 at a suitable distance from the flushing fluid in the pulp cavity, and focus the laser beam into the flushing fluid in the pulp cavity in a non-contact manner to achieve root canal flushing through the laser-induced photobreakdown effect.

[0056] In some embodiments, the working tool 130 may also include an optical beam expansion and collimation component, which is used to expand and collimate the received laser beam, and transmit the expanded and collimated laser beam to the optical focusing component 131, and the optical focusing component 131 focuses the expanded and collimated laser beam into the flushing fluid in the pulp cavity.

[0057] In the above embodiments, the working hand uses an optical focusing component to focus the received laser beam, or uses an optical beam expansion and collimation component and an optical focusing component to sequentially expand, collimate and focus the received laser beam, which can simply and accurately focus the received laser beam into the flushing liquid in the pulp cavity without contact with the flushing liquid in the pulp cavity, thereby improving the flexibility and convenience of operation. In addition, since the working hand does not need to be inserted into the flushing liquid in the pulp cavity during the root canal flushing process, the safety risks caused by the breakage or dislocation of the working hand can be reduced.

[0058] In some embodiments, the root canal flushing device 100 further includes a laser aiming device; the laser aiming device is used to output visible light coaxial with the laser beam, so as to aim the focal point of the laser beam using the visible light.

[0059] Here, the laser aiming component may be disposed in the working host 110 , or in the light guide 120 , or in the working tool 130 , and this is not limited in the embodiment of the present disclosure.

[0060] For example, the laser sighting piece may be disposed inside the laser generating module in the working host 110. For another example, when the light guide 120 is a light guide joint arm, the laser sighting piece may be disposed at a joint position of the light guide joint arm.

[0061] Visible light may include, but is not limited to, at least one of red light, green light, blue light, and the like.

[0062] It can be understood that the visible light output by the laser aiming device is coaxial with the laser beam, and the visible light can reach the focal point of the laser beam along the optical transmission path of the laser beam. In this way, before the working hand 130 outputs the laser beam, the focal point of the laser beam can be aimed at by the visible light, so that when the working hand 130 adopts a non-contact method with the flushing fluid in the pulp cavity, the laser beam can be focused at a suitable position in the flushing fluid in the pulp cavity, thereby improving the flushing effect and reducing the patient's pain caused by the inappropriate position of the laser beam focusing point.

[0063] In some embodiments, Figure 7 As shown, the working tool 130 has an optical fiber head 132; the optical fiber head 132 is used to focus the received laser beam on the laser output end 132a of the optical fiber head 132 by contacting the flushing fluid in the pulp cavity to form a focusing point in the flushing fluid in the pulp cavity.

[0064] Here, during the root canal flushing process, the operator can hold the working tool 130 and place the optical fiber head 132 of the working tool 130 at a suitable position in the flushing fluid in the pulp cavity, so that the laser output end of the optical fiber head 132 is located in the flushing fluid, thereby contacting the flushing fluid in the pulp cavity and focusing the laser beam in the flushing fluid to achieve root canal flushing through the laser-induced photobreakdown effect.

[0065] In some embodiments, Figure 8 As shown, the root canal flushing device 100 further includes a control component 140. The control component 140 is communicatively connected to a control connection port (not shown in the figure) on the working host 110, and is used to control the laser generating module to generate a laser beam through the control connection port.

[0066] Here, the control member 140 may include but is not limited to at least one of a control foot pedal, a control button, and a control switch light.

[0067] The control component 140 and the control connection port on the working host 110 can communicate in any suitable manner, which is not limited here. In some embodiments, the control connection port may include but is not limited to at least one of a wireless communication module and a 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 Communication (4G) module or a 5th Generation 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), a Micro SD card slot, an OTG (On-The-Go) connection port for data exchange between different devices, etc.

[0068] The control element 140 may be implemented by a logic circuit, or may be implemented by at least one of a single chip microcomputer, an embedded processor chip, a digital signal processor (DSP) chip, or a field programmable gate array (FPGA).

[0069] In some embodiments, Fig. 9 As shown, the control member 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 connection port when it is in the first pedaling gear position.

[0070] Here, the control pedal 141 may have at least one pedaling gear.

[0071] For example, after setting the root canal flushing program and placing the working tools in a suitable position, the operator can control the laser generating module to generate a laser beam by stepping on the control pedal to the first stepping gear position, thereby starting to flush the root canal.

[0072] In some embodiments, the root canal flushing device 100 also includes a laser aiming device; the control pedal 141 is also used to control the laser aiming device to output visible light coaxial with the laser beam through the control connection port when in the second pedaling gear position, so as to use the visible light to aim at the focal point of the laser beam.

[0073] Here, the control pedal 141 may have at least two pedaling gears. The second pedaling gear is different from the first pedaling gear.

[0074] After setting up the root canal flushing program, the operator can control the laser aiming device to output visible light coaxial with the laser beam by pressing the control pedal to the second pedal position, and adjust the position and / or angle of the working tool according to the visible light to aim the focal point of the laser beam at the appropriate position in the flushing fluid in the pulp cavity; then, the operator can press the control pedal to the first pedal position to control the laser generating module to generate a laser beam, thereby starting to flush the root canal.

[0075] In some embodiments, the operator can step on the control pedal to the first pedal position, and the control pedal can control the laser generating module to generate a laser beam, and at the same time can control the laser aiming device 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 bright throughout the whole process, so that during the root canal flushing process, the operator can be better guided in real time to operate the working tool according to the visible light, so as to focus the laser beam at a precise position and improve the operation accuracy.

[0076] The first pedaling gear and the second pedaling gear can be set by those skilled in the art according to actual conditions, and the embodiments of the present disclosure do not limit this. For example, the first pedaling gear can be the gear corresponding to fully stepping down the pedal of the control pedal, and the second pedaling gear can be the gear corresponding to half stepping down the pedal of the control pedal.

[0077] In this way, by controlling the two pedal positions of the foot pedal, the laser aiming device is controlled to output visible light coaxial with the laser beam, and the laser generating module is controlled to generate a laser beam. This can improve the convenience of aiming operation of the laser beam focusing point and flushing operation during the root canal flushing process, and facilitate clinical operation.

[0078] In some embodiments, a pumping device and a liquid storage tank are also provided in the working host 110; the pumping device is used to transport the flushing liquid in the liquid storage tank to the pulp cavity during the process of flushing the root canal by the working tool using the photolysis effect.

[0079] In some embodiments, there may be multiple liquid storage tanks, and the types of flushing liquids stored in each liquid storage tank may be the same or different. The pumping device is used to deliver the flushing liquids in each liquid storage tank to the dental pulp cavity according to a preset root canal flushing procedure during the process of flushing the root canal using the light-induced breakdown effect by the working hand tool.

[0080] In some embodiments, the pumping device may include a pump-pushing positive pressure liquid supply system.

[0081] The following describes the laser-induced plasma cavitation activated root canal flushing device provided by the embodiment of the present disclosure in combination with actual application scenarios. It is understandable that the root canal flushing process will also have a certain disinfection effect on the root canal, so the root canal flushing device can also be used as a root canal flushing and disinfection device.

[0082] The present disclosure discloses a laser-induced plasma cavitation activated root canal irrigation device. Fig.10 and Fig.11 As shown, the root canal irrigation device 100 is composed of a working main body 110, a light-guiding joint arm 121, a working hand tool 130 and a control foot pedal 141. The working main body 110 is equipped with a laser generating module 111, a power control module 112, a working parameter adjustment panel 113, a cooling device 114, a pump-pushed positive pressure liquid supply system 115 and a liquid storage tank 116. The light-guiding joint arm 121 is equipped with an optical reflection transmission system and a coaxial visible light red light aiming system. The working hand tool 130 is equipped with an optical beam expansion collimation component and an optical focusing component. The laser is generated in the laser generating module 111 in the working main body 110, and the laser is transmitted from the laser generating module 111 to the working hand tool 130 through the light-guiding joint arm 121, and finally transmitted to the irrigation liquid in the pulp cavity of the surgical area through the working hand tool 130. The control pedal 141 includes a laser working mode locking button, a liquid spraying switch button and a foot pedal. The foot pedal has a half-stepping gear (corresponding to the second stepping gear in the aforementioned embodiment) and a full-stepping gear (corresponding to the first stepping gear in the aforementioned embodiment). The half-stepping gear is used to start the visible light for aiming, and the full-stepping gear is used to start the laser to enter the working mode for laser activation and flushing. Before the device works, the root canal flushing liquid is injected into the root canal, the working handpiece 130 is placed outside the pulp cavity of the affected tooth, the laser beam is focused on the flushing liquid in the pulp cavity through visible light aiming, and the laser is started for irradiation; at the same time, the positive pressure pump pushes the liquid supply system 115 to continuously spray the flushing liquid into the pulp cavity, the laser focus point is located in the flushing liquid in the pulp cavity, a photo-induced breakdown effect is generated in the flushing liquid and plasma is formed, and the shock wave and cavitation bubble oscillation effect generated by the plasma activate the liquid to produce flushing and cleaning effects on the root canal, so as to enhance the infection control effect of the root canal system during dental canal treatment. The root canal flushing device can improve the flushing and disinfection effect on the root canal of the affected tooth during root canal treatment, and play an important auxiliary role in improving infection control during root canal treatment.

[0083] In the root canal flushing device provided by the embodiment of the present disclosure, a short pulse width laser of the nanosecond level is used to make its power density exceed the breakdown threshold of the flushing liquid, thereby generating a photo-induced breakdown effect on the flushing liquid, and effectively activating the flushing liquid in the pulp cavity and the root canal by forming plasma and cavitation bubbles in the liquid, thereby exerting the root canal flushing and disinfection effect, which helps to improve the infection control effect in root canal treatment, and can effectively clean the root canal system in three dimensions, thereby improving the long-term efficacy of root canal treatment. The root canal is cleaned and disinfected by the root canal flushing device, and the instrument does not enter below the root canal opening, and can also produce an effect in the pulp cavity without contacting the flushing liquid in the pulp cavity, effectively flushing, cleaning and disinfecting the entire root canal system, effectively reducing the risk of instrument separation in the root canal.

[0084] In some embodiments, the working host 110 adjusts the laser output parameters through the working parameter adjustment panel 113, and controls the electronic control system of the device through the power control module. The laser generating module 111 is used to generate and output a laser beam, and then transmit it through the light-guiding joint arm 121 connected to the working host 110. The cooling device 114 is used to cool the laser generating module 111 through a water cooling cycle. The pump-pushing positive pressure liquid supply system 115 is used to transfer the root canal flushing liquid (such as distilled water, saline, sodium hypochlorite solution, ethylenediaminetetraacetic acid (EDTA) solution, and / or chlorhexidine solution and other root canal flushing and disinfection solutions) in the liquid storage tank 116 through a liquid transmission system to the working hand tool through a positive pressure pump-pushing action.

[0085] In some embodiments, the working parameter adjustment panel 113 on the working host 110 includes a laser emergency stop button, a standby key, a ready key, a parameter adjustment display window and keys, an indicator light switch button, a water volume adjustment key, and a liquid storage tank program setting key. Among them, 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 keys are used to adjust the energy output parameters of the laser (such as single pulse energy, frequency, etc.); the indicator light switch button is used to turn on and off the visible light red light indicator light coaxial with the laser beam; the water volume adjustment button is used to adjust the fluid flow output by the pump-pushed positive pressure liquid supply system 115; the liquid storage tank program setting key is used to set the working liquid storage tank 116; the standby key is used for confirmation after the parameter adjustment is completed; and the ready key is used for the final confirmation before the laser emits light.

[0086] In some embodiments, the liquid storage tank 116 in the working host 110 includes four independent liquid storage tanks, and the liquid storage tank bodies are all made of metal stainless steel. The four independent liquid storage tank bodies are respectively a cleaning tank, a solution tank 1, a solution tank 2, and a solution tank 3. Distilled water is stored in the cleaning tank to flush and clean the transmission pipeline of the entire pump-pushed positive pressure liquid supply system 115. Solution tank 1, solution tank 2, and solution tank 3 are used to store root canal flushing liquid. For example, solution tank 1, solution tank 2, and solution tank 3 can support the storage of 3 different root canal flushing liquids.

[0087] The following describes the operation method of the laser-induced plasma cavitation activated root canal irrigation device provided by the embodiment of the present disclosure. The root canal irrigation device can be operated by an operator such as a doctor, and the operation method includes the following steps S301 to S311: Step S301, according to the steps of conventional root canal treatment, complete local anesthesia of the affected tooth, isolation of the surgical area (such as rubber dam isolation, etc.), pulp opening of the affected tooth, root canal positioning and dredging, and root canal preparation and shaping. After the root canal preparation is completed, the laser activation and flushing phase can be entered. Before laser activation and flushing, a syringe flushing needle needs to be used to fill the pulp cavity and the root canal with root canal flushing solution (the injected flushing solution can be consistent with the first flushing solution of the root canal flushing procedure, such as sodium hypochlorite solution).

[0088] Step S302, connect the working hand tool to the light guide joint arm and connect the transmission water pipe. Put the working hand tool outer sleeve on the outside of the working hand tool, and the working hand tool outer sleeve needs to be sterilized by high temperature and high pressure before use.

[0089] Step S303, connecting the control pedal to the control pedal connection port (corresponding to the control connection port in the above-mentioned embodiment) on the working host through the control pedal connection line.

[0090] Step S304, unscrew the liquid storage tank cover on the liquid 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 perfusion, close the liquid storage tank cover.

[0091] Step S305, turn on the power switch on the working host, set the root canal flushing program on the working parameter adjustment panel, and set the liquid flow rate pushed by the positive pressure pump.

[0092] For example, the root canal irrigation procedure can be laser-activated irrigation with sodium hypochlorite solution for 30 seconds (positive pressure pump push in reservoir 1), laser-activated irrigation with normal saline for 30 seconds (positive pressure pump push in reservoir 2), laser-activated irrigation with 17% EDTA solution for 30 seconds (positive pressure pump push in reservoir 3), and laser-activated irrigation with normal saline for 30 seconds (positive pressure pump push in reservoir 2). The entire root canal irrigation process takes a total of 120 seconds.

[0093] Step S306, starting the pump-pushing positive pressure liquid supply system, pumping the solution in the liquid storage tank 1 to the liquid spraying port of the working tool until the liquid at the liquid spraying port is sprayed out.

[0094] Step S307, set the single pulse energy and frequency of the laser output on the working parameter adjustment panel, press the standby key after the setting is completed, and then press the ready key, and then the laser activation and washing program can be started.

[0095] Step S308, the operator (such as a dentist) holds the working hand tool, places the front end of the working hand tool above the pulp opening of the affected tooth to be cleaned and disinfected in the patient's mouth, and half-steps on the control pedal to output visible red light indicator light, and determines that the laser focus is located in the center of the pulp cavity of the affected tooth through the indicator light. At this time, the pedal is fully stepped on to output the laser, and the laser will be focused in the liquid in the pulp cavity, producing a photo-induced breakdown effect and generating plasma. The shock wave and cavitation bubble oscillation generated by the plasma complete the activation and oscillation of the liquid in the pulp cavity and the root canal, and the laser activation root canal flushing and disinfection effect is exerted. After the 30-second flushing program is completed, the flushing is ended.

[0096] Step S309, after the positive pressure pump of the flushing liquid tank 2 pushes out the flushing liquid, the second flushing cycle begins, and the 1-4 flushing cycles are completed at one time. The effective root canal laser activation flushing time is accumulated to 120 seconds.

[0097] Step S310, after completing all the laser activated flushing procedures, continue to complete the subsequent root canal treatment steps (such as root canal drying and sealing or root canal filling, etc.). At this time, you can press the cleaning button on the control panel, and the distilled water in the cleaning tank is pumped out by the pump-pushing positive pressure liquid supply system to clean the liquid delivery pipeline. The cleaning stops after 30 seconds. The pump-pushing positive pressure liquid supply system transmits compressed air into the liquid delivery pipeline to dry the pipeline, and stops after drying for 30 seconds.

[0098] Step S311, remove the outer sleeve of the working tool and send it to high temperature and high pressure disinfection, remove the working tool and wipe it with 75% alcohol for disinfection, drain the liquid in the liquid storage tank and use distilled water to clean it, and then put it back after drying.

[0099] The laser-induced plasma cavitation-activated root canal flushing device provided in the embodiment of the present disclosure can perform laser activation flushing on the pulp cavity and root canal system of the affected tooth during root canal treatment. During the laser activation flushing process, the instrument box device does not enter the root canal system below the root canal opening, but is only located above the root canal opening in the pulp cavity, thereby effectively avoiding the risk of breakage caused by the instrument entering the root canal. In addition, the root canal flushing 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 produce a photo-induced breakdown effect in the liquid, generate plasma in the root canal flushing liquid in the pulp cavity, and then generate shock waves and cavitation bubble oscillations, which effectively activate the liquid in the pulp cavity and the root canal, thereby being able to perform good flushing and disinfection on the pulp cavity and the root canal system of the affected tooth during root canal treatment.

[0100] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present disclosure, the size of the serial number of the above-mentioned processes does not mean the 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 the present disclosure. The serial numbers of the embodiments of the present disclosure are for description only and do not represent the advantages and disadvantages of the embodiments.

[0101] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0102] In the several embodiments provided in the present disclosure, it should be understood that the disclosed devices can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0103] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0104] In addition, all functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may be separately configured as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0105] The above description is only an implementation mode of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure.

Claims

1. A laser-induced plasma cavitation activated root canal irrigation device, characterized in that: include: A working host, a light guide and a working tool, wherein the working host is provided with a laser generating module, and the light guide connects the laser generating module and the working tool; wherein: 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 flushing fluid in the pulp cavity, use the laser energy to produce a photo-breakdown effect in the flushing fluid in the pulp cavity, and induce plasma cavitation to activate the flushing fluid in the root canal, so as to flush the root canal.

2. The root canal flushing device according to claim 1, characterized in that: The laser beam generated by the laser generating module passes through the light guide and the working tool to form a focal point in the flushing fluid in the pulp cavity. The power density of the focal point is greater than a density threshold, which is a breakdown threshold of the flushing fluid.

3. The root canal flushing device according to claim 1, characterized in that: The laser generating module includes a nanosecond laser, a picosecond laser, and / or a femtosecond laser.

4. The root canal irrigation device according to claim 1, characterized in that: The working hand tool is used to focus the received laser beam into the flushing liquid in the dental pulp cavity by using a target focusing method; The target focusing method includes one of the following: contacting with the flushing liquid in the dental pulp cavity, and not contacting with the flushing liquid in the dental pulp cavity.

5. The root canal flushing device according to claim 4, characterized in that: The working hand tool comprises an optical focusing component; The optical focusing component is used to focus the received laser beam into the flushing fluid in the dental pulp cavity in a non-contact manner.

6. The root canal flushing device according to claim 5, characterized in that: The root canal flushing device also includes a laser aiming member; The laser aiming component 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 flushing device according to claim 4, characterized in that: The working tool has an optical fiber head; The optical fiber head is used to focus the received laser beam on the laser output end of the optical fiber head in a manner of contacting with the flushing fluid in the dental pulp cavity, so as to form a focusing point in the flushing fluid in the dental pulp cavity.

8. The root canal irrigation device according to any one of claims 1 to 7, characterized in that: The root canal irrigation device also includes a control member; The control component is communicatively connected with the control connection port on the working host, and is used for controlling the laser generating module to generate a laser beam through the control connection port.

9. The root canal irrigation device according to claim 8, characterized in that: The control member includes a control pedal; The control pedal is used to control the laser generating module to generate a laser beam through the control connection port when the control pedal is in the first pedaling gear position.

10. The root canal irrigation device according to claim 9, characterized in that: The root canal flushing device also includes a laser aiming member; The control pedal is also used to control the laser aiming device to output visible light coaxial with the laser beam through the control connection port when in the second pedaling gear position, so as to aim at the focal point of the laser beam using the visible light.

11. The root canal irrigation device according to any one of claims 1 to 7, characterized in that: The working main machine is also provided with a liquid pump device and a liquid storage tank; The pumping device is used to transport the flushing liquid in the liquid storage tank to the dental pulp cavity when the working tool flushes the root canal using the photolysis effect.

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