Tooth surface laser treatment method and laser treatment system thereof

Abstract

The invention discloses a tooth surface laser treatment method and a laser treatment system thereof. The tooth surface laser treatment method is suitable for teeth and comprises the following steps. The teeth are preliminarily examined to obtain tooth information, and it is determined that the teeth are suitable for laser processing. A laser processing system is selected according to the tooth information, selection is carried out according to the to-be-processed part and degree of the surface of the tooth, and laser parameters are loaded. A laser treatment step of a surface of a tooth is performed using a laser treatment system to form a laser treatment structure on the surface of the tooth, where the laser treatment structure includes a plurality of micro-grooves and a plurality of micro-bumps between the micro-grooves.

Description

Technical Field

[0001] The present invention generally relates to a tooth treatment method and a tooth treatment system, and more specifically, the present invention relates to a tooth surface laser treatment method and a laser treatment system thereof. Background Art

[0002] In recent years, as many people pursue a healthier body and appearance, they try various methods to show a neat and attractive appearance. In addition to showing confidence, it can also attract people's attention. Among them, beautiful and white teeth can represent a healthy body, and white teeth can also add to the charm of a beautiful smile.

[0003] To have white teeth, in addition to healthy teeth, it is also necessary to reduce the adhesion of easily stained liquids such as tea and coffee on the surface of teeth, or even to penetrate and stain the inside of teeth, causing different colors of teeth. In addition, a proper surface texture structure is required to make the incident light from all directions produce uniform reflection, further achieving the effect of whitening teeth.

[0004] At present, the commonly used whitening methods in dental clinics are sandblasting whitening and cold light whitening. Sandblasting whitening mainly removes deposits on the surface of teeth and restores the original color of teeth. By mixing baking soda and water, using air pressurization to form a strong water column, dental plaque, smoke stains, tea stains, coffee stains or betel nut stains on the surface of teeth are removed. However, if the teeth are unhealthy, using sandblasting whitening is likely to cause pain in the teeth during the process. Cold light whitening uses a high concentration of hydrogen peroxide whitening agent, plus the use of blue light irradiation, so that the agent performs an oxidation-reduction effect on the surface of the teeth to achieve a whitening effect. However, due to the high concentration of the agent, it is easy to cause sensitivity and discomfort to the user.

[0005] Therefore, for users, how to achieve the whitening effect while having both anti-fouling and antibacterial effects, and reduce the pain or discomfort caused to the user during the whitening process. The above problems have become problems that technicians in this field are eager to solve. Summary of the invention

[0006] One object of the present invention is to provide a laser treatment method for tooth surface and a laser treatment system thereof. The laser treatment system is used to perform a laser treatment step on the tooth surface to form a laser treatment structure on the tooth surface. During the treatment process, the user will not feel the laser treatment process and therefore will not feel discomfort. The laser treatment structure formed by the laser treatment step can make the incident light reflect, refract, diffract and scatter evenly, so that others can see that the teeth can appear uniformly white, thereby achieving a whitening effect. In addition, the micro-grooves and micro-bumps formed in the laser treatment step can enhance the hydrophobicity of the tooth surface and relatively enhance the anti-fouling effect. Moreover, the micro-grooves and micro-bumps make it difficult for bacteria to adhere to the tooth surface, reduce the probability of biofilm formation, and relatively enhance the antibacterial effect.

[0007] An embodiment of the present invention provides a tooth surface laser treatment method applicable to teeth, comprising the following steps. Preliminary inspection of the teeth to obtain tooth information, and determine whether the teeth are suitable for laser treatment. Select a laser treatment system based on the tooth information, and select according to the location and degree of the tooth surface to be treated, and load laser parameters. Use the laser treatment system to perform a laser treatment step on the tooth surface, and form a laser treatment structure on the tooth surface, wherein the laser treatment structure includes a plurality of micro grooves and a plurality of micro bumps between the micro grooves.

[0008] In one embodiment, the tooth includes an artificial crown.

[0009] In one embodiment, the surface of the tooth includes a crown surface.

[0010] In one embodiment, forming a laser-processed structure on a surface of a tooth includes forming a laser-processed structure on an outer surface, a top surface, or an inner surface.

[0011] In one embodiment, forming the micro grooves includes using a laser beam of a laser processing system to form a plurality of first micro grooves and a plurality of second micro grooves on the surface of the tooth, wherein the first micro grooves are staggered with the second micro grooves.

[0012] In one embodiment, the micro grooves have a pitch ranging from 0.5 micrometers to 500 micrometers.

[0013] In one embodiment, the micro groove has a groove width ranging from 0.5 micrometers to 500 micrometers.

[0014] In one embodiment, the micro grooves have a groove depth ranging from 0.5 micrometers to 500 micrometers.

[0015] In one embodiment, the micro groove has a sidewall with an inclination angle ranging from 1° to 80°.

[0016] In one embodiment, a micro-nano processing structure is formed on the micro-bumps and micro-grooves, including a plurality of micro-nano grooves and a plurality of micro-nano bumps between the micro-nano grooves.

[0017] In one embodiment, the micro-nano groove has a groove width that is smaller than a groove width of the micro groove.

[0018] In one embodiment, the laser processing step includes performing a mixing step to simultaneously form the laser processed structure and the micro-nano processed structure.

[0019] One embodiment of the present invention provides a tooth surface laser processing system, comprising a laser source, a scanning unit and a control unit. The laser source emits a laser beam. The scanning unit receives the laser beam and projects the laser beam to the surface of the tooth to form a laser processing structure on the surface of the tooth, wherein the laser processing structure includes a plurality of micro grooves and a plurality of micro bumps between the micro grooves. The control unit is electrically connected to the laser source and the scanning unit to control the laser source and the scanning unit.

[0020] In one embodiment, a transmission unit is further included, connected to the laser source and the scanning unit, for transmitting the laser beam.

[0021] In one embodiment, the transmission unit includes a lens and a reflector for transmitting the laser beam.

[0022] In one embodiment, the scanning unit includes a first laser galvanometer, a second laser galvanometer and a flat-field focusing lens. The first laser galvanometer and the second laser galvanometer control the irradiation position of the laser beam on the surface, and the flat-field focusing lens focuses the laser beam on the surface of the tooth.

[0023] In one embodiment, a U-shaped slide rail is further included, and the scanning unit is disposed on the U-shaped slide rail to assist the scanning unit in aligning with the teeth.

[0024] In one embodiment, a light guide unit is further included to reflect the laser beam to a top surface or an inner surface of the tooth.

[0025] In one embodiment, the light guide unit includes a light guide portion, a reflective portion and a supporting portion, the reflective portion is connected to the light guide portion, and the supporting portion is connected to the reflective portion.

[0026] Compared with the prior art, the tooth surface laser processing method and laser processing system of the present invention use a laser processing step to process the tooth surface to form a laser processing structure with multiple micro grooves and multiple micro bumps. By adjusting the groove spacing and groove depth, the reflection and scattering angle of the incident light on the tooth surface can be changed, so that the teeth can present a uniform natural primary color, achieve the effect of teeth whitening, and at the same time affect the roughness and wettability of the tooth surface. The micro-nano texture structure designed by the micro grooves and micro bumps can make the tooth surface have a super hydrophobic structure, so that liquids that are easy to stain are not easy to adhere to the tooth surface to form precipitates. In addition, it can also be designed as an antibacterial texture structure, so that dental plaque is not easy to adhere to the tooth surface to form a biofilm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a method for laser treatment of tooth surface according to an embodiment of the present invention.

[0028] Figure 2A FIG. 1 is a schematic front view of a tooth surface according to an embodiment of the present invention.

[0029] Figure 2B FIG. 1 is a schematic top view of a tooth surface according to an embodiment of the present invention.

[0030] Figure 2C FIG. 1 is a schematic diagram of a three-dimensional structure of a tooth surface according to an embodiment of the present invention.

[0031] Figure 3 FIG. 4 is a schematic structural diagram of a laser processing system according to an embodiment of the present invention.

[0032] Figure 4 It is an enlarged schematic diagram of a laser processing structure for laser processing of a tooth surface according to an embodiment of the present invention.

[0033] Figure 5A FIG. 1 is a front view schematic diagram of a laser processing structure according to an embodiment of the present invention.

[0034] Figure 5B The laser processing structure of one embodiment of the present invention is as follows Figure 5A Schematic cross-sectional view of section line AA'.

[0035] Figure 5C FIG. 4 is a schematic diagram of a three-dimensional structure of a laser processing structure according to an embodiment of the present invention.

[0036] Figure 6 FIG. 1 is a schematic structural diagram of an artificial denture according to an embodiment of the present invention.

[0037] Fig. 7A This is a schematic diagram of using a laser treatment system to treat a user's teeth according to an embodiment of the present invention.

[0038] Figure 7B This is a schematic structural diagram of a laser processing system according to another embodiment of the present invention, which is assisted by a U-shaped slide rail.

[0039] Figure 8 A schematic cross-sectional view of treating the outer surface of a tooth using a laser treatment system according to an embodiment of the present invention.

[0040] Fig. 9 A schematic cross-sectional view of treating the top surface of a tooth using a laser treatment system according to an embodiment of the present invention.

[0041] Fig.10 A schematic cross-sectional view of treating the inner surface of a tooth using a laser treatment system according to an embodiment of the present invention.

[0042] Fig.11 FIG. 4 is a schematic cross-sectional view of a laser processing structure according to another embodiment of the present invention.

[0043] Description of main component symbols:

[0044] 10 Teeth

[0045] 12 Teeth

[0046] 20, 20A crown

[0047] 30 bottom

[0048] 40 Surface

[0049] 40A crown surface

[0050] 42, 42L, 42U outer surface

[0051] 44, 44L, 44U Top surface

[0052] 46, 46L, 46U inner surface

[0053] 47 first side surface

[0054] 48 Second side surface

[0055] 50 Base

[0056] 60 Implants

[0057] 100 Laser processed structures

[0058] 110 Micro Grooves

[0059] 110a First micro groove

[0060] 110b Second micro groove

[0061] 120 micro bumps

[0062] 200 Micro-nano processing structure

[0063] 210 Micro-Nano Grooves

[0064] 220 Micro-nano bumps

[0065] 1000 Laser Processing Systems

[0066] 1100a, 1100b, 1100c, 1100d, 1100e, 1100f, 1100g Laser beam

[0067] 1200 Laser Source

[0068] 1300 Transmission Unit

[0069] 1310 Lens

[0070] 1320 Reflector

[0071] 1400 Scanning Unit

[0072] 1410 Reflector

[0073] 1420 First Laser Galvanometer

[0074] 1430 Second laser galvanometer

[0075] 1440 Flat-field focusing lens

[0076] 1500 Control Unit

[0077] 1600 Laser Head

[0078] 1700 Mouth

[0079] 1800 U-shaped slide rail

[0080] 1900 Connecting bracket

[0081] 2000 Light guide unit

[0082] 2100 Divider

[0083] 2200 Light guide

[0084] 2300 Reflector

[0085] 2400 Support

[0086] 2500 Tooth Receiving Slot

[0087] 3000 Light guide unit

[0088] 3100 Divider

[0089] 3200 Light guide

[0090] 3300 Reflector

[0091] 3400 Support

[0092] 3500 Tooth Receiving Slot

[0093] Da, Db Groove depth

[0094] I. Teeth Information

[0095] LP laser parameters

[0096] LPS laser treatment steps

[0097] Pa, Pb pitch

[0098] Ta, Tb top width

[0099] Tmn Top Width

[0100] Wa, Wb Groove width

[0101] Wmn Groove width

[0102] θ Tilt angle DETAILED DESCRIPTION

[0103] In the various embodiments of the present invention, the terms used herein are only for the purpose of describing specific embodiments and are not restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include plural forms, including "at least one". As used herein, the term "a" includes any and all combinations of one or more of the associated listed items.

[0104] In the embodiments of the present invention, "upper", "lower", "left", "right", "front" or "rear" is used herein to describe the relationship between one element and another element, and is only used to illustrate the orientation presented in the drawings, and does not limit its actual position. The device in the drawings does not limit the orientation or orientation of its elements due to the flipping of the device. The D1 axis, D2 axis and D3 axis directions in the drawings are perpendicular to each other, such as the X axis, Y axis and Z axis directions of a rectangular coordinate system, but their corresponding relationship is not limited.

[0105] Figure 1 The present invention is a method for laser treatment of tooth surface according to an embodiment of the present invention. Figure 2A , Figure 2B and Figure 2C Schematic diagram of the front view, top view and three-dimensional structure of the tooth surface according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of a laser processing system according to an embodiment of the present invention. Figures 1 to 3In order to highlight the technology and advantages of the present invention, the dimensions, proportions and structural representations in the diagrams are appropriately adjusted, so that the purpose and advantages of the present invention are more easily understood. The laser processing system 1000 of the present invention is only used for illustration and does not represent its actual size and configuration. Without departing from the spirit and scope of the present invention, those skilled in the art may appropriately modify the structural design of the laser processing system 1000 and still achieve the effects of the present invention.

[0106] Please refer to Figure 1 , FIG. 2A to FIG. 2C First, a preliminary inspection of the tooth 10 is performed to obtain tooth information I, and determine whether the tooth 10 is suitable for the laser treatment step LPS (step S100). The inspection of the tooth 10 includes the health status of the tooth, and determines whether the tooth is suitable for the laser treatment step LPS, such as whether there are dental pulp lesions, periodontal disease, caries, etc. If so, treatment should be performed first, and the laser treatment step LPS should be performed after the tooth recovers sufficiently. In addition, the inspection of the tooth 10 also includes the physical state of the tooth, such as whether there are dentures, what material they are made of, and where they are installed. Whether the pigmentation on the tooth surface is serious, if serious, it should be cleaned to remove the surface pigment.

[0107] If the tooth 10 is healthy, the laser treatment step LPS can be performed. Before the laser treatment step LPS can be performed, a tooth cleaning step can be performed to clean the tooth 10 and remove dirt and residual substances on the surface of the tooth 10. It is prevented that the dirt and residual substances on the surface absorb the irradiated laser energy and affect the effect of the laser treatment step LPS.

[0108] Please refer to Figure 1 , FIG. 2A to FIG. 2C Then, according to the tooth information I, an appropriate laser processing system 1000 is selected, and the laser parameters LP are loaded according to the position and degree of the tooth 10 surface to be processed (step S200). For example, different laser processing systems can be selected according to the different materials of the denture and the real tooth, and the corresponding required laser parameters LP are loaded, such as laser type, laser wavelength, laser power, pulse width, laser spot diameter, etc.

[0109] Please refer to Figure 1 , FIG. 2A to FIG. 2C Then, a laser processing system 1000 is used to perform a laser processing step LPS on the surface of the tooth 10 to form a laser processed structure 100 (such as Figure 4 and FIG. 5A to FIG. 5C As shown), it includes a plurality of micro grooves 110 and a plurality of micro bumps 120 between the micro grooves 110 (step S300).

[0110] Please refer to FIG. 2A to FIG. 2CIn this embodiment, molars are used as examples, but the invention can also be applied to teeth in other parts without limitation. The tooth 10 at least includes a crown 20, a bottom 30, and a surface 40. The crown 20 can be a crown of a false tooth or a crown of a real tooth. The bottom 30 can be connected to a base 50 and an implant 60 (such as a tooth implant) for implantation. Figure 6 The surface 40 of the tooth 10 includes an outer surface 42, a top surface 44, an inner surface 46, a first side surface 47 and a second side surface 48. The outer surface 42 faces outward and is the surface of the tooth 10 that is usually seen from the outside, the inner surface 46 is the surface facing the oral cavity, and the top surface 44 is the surface of the upper and lower teeth for chewing food. Since the outer surface 42 is usually the tooth surface visible to the human eye, its whitening effect directly affects people's perception of the effect of teeth whitening.

[0111] Please refer to Figure 3In this embodiment, a laser processing system 1000 is used as an example, but it is not limited thereto. The laser processing system 1000 includes at least a laser source 1200, a scanning unit 1400, and a control unit 1500. The laser source 1200 can be, for example, a pulsed laser or a continuous-wave laser. The pulsed laser source 1200 can, for example, use lasers with different laser pulse widths, such as nanosecond lasers, picosecond lasers, or femtosecond lasers, and can have better laser peak power. Among them, picosecond lasers and femtosecond lasers have concentrated energy, can accurately draw lines on the tooth surface 40, and can be suitable for making shallow grooves. The laser source 1200 can use different laser source materials, such as solid lasers, semiconductor lasers, gas lasers, or liquid lasers. Solid laser sources may be, for example, Yttrium Aluminum Garnet (YAG) lasers, Neodymium-doped Yttrium Al uminum Garnet (Nd:YAG) lasers, Diode-Pumped Solid-State (DPSS) lasers, etc., but are not limited thereto. Semiconductor laser sources may be, for example, Aluminum Gallium Arsenide (AlGaAs) lasers, Indium Gallium Arsenide Phosphide (Indium Gallium Arsenide Phosphide) lasers, etc., but are not limited thereto. Gas laser sources may be, for example, carbon dioxide (CO2) lasers, etc., but are not limited thereto. If necessary, fiber lasers may also be used, using optical fibers (not shown) as gain media to improve photoelectric conversion efficiency and adjust laser power and output quality.

[0112] Please refer to Figure 3 , the laser beam 1100a emitted by the laser source 1200 can be transmitted to the scanning unit 1400 through the transmission unit 1300. The lens 1310 and the reflector 1320 can be selectively provided in the transmission unit 1300. The laser beam 1100a can, for example, adjust the diameter of the laser beam 1100a through the lens 1310 to form a laser beam 1100b. Then, the formed laser beam 1100b can, for example, be reflected by the reflector 1320 to form a laser beam 1100c to the scanning unit 1400, but this is not limited. The laser beam 1100a can also be directly transmitted to the scanning unit 1400 through an optical fiber (not shown), for example, to increase the flexibility in design and use.

[0113] Please refer to Figure 3 , the scanning unit 1400 at least includes a first laser galvanometer 1420, a second laser galvanometer 1430 and a flat-field focusing lens (f-θlens) 1440. In addition, the scanning unit 1400 may selectively include a reflector 1410. The laser beam 1100c transmitted by the transmission unit 1300, for example, may be selectively reflected by the reflector 1410 to form a laser beam 1100d to the first laser galvanometer 1420. The laser beam 1100d is adjusted by the first laser galvanometer 1420 to reflect to the position of the second laser galvanometer 1430. The laser beam 1100e formed by the reflection of the first laser galvanometer 1420 is adjusted by the second laser galvanometer 1430 to reflect to the position of the flat-field focusing lens 1440. The laser beam 1100f formed by the reflection of the second laser galvanometer 1430 is fine-tuned by the flat-field focusing lens 1440 to form a laser beam 1100g, which can be accurately focused on the outer surface 42, the top surface 44 or the inner surface 46 of the crown 20. The irradiation position of the laser beam 1100g is controlled by the first laser galvanometer 1420 and the second laser galvanometer 1430, and the horizontal scanning in the XY direction can be accurately performed. The first laser galvanometer 1420 and the second laser galvanometer 1430 are preferably digital laser galvanometers, which can accurately control the deflection angle of the laser galvanometer to achieve high-speed and accurate scanning. By using a digital laser galvanometer in combination with a flat-field focusing lens, the irradiation position of the laser beam 1100g on, for example, the top surface 44 can be accurately controlled, and the scanning irradiation position accuracy can reach 1 micron. The control unit 1500 is electrically connected to the laser source 1200 and the scanning unit 1400 to control the operation of the laser source 1200 and the scanning unit 1400.

[0114] Figure 4 The enlarged schematic diagram of the laser processed structure of the tooth surface laser processing according to one embodiment of the present invention is shown. After the tooth 10 undergoes the laser processing step LPS, a laser processed structure 100 is formed on the surface 40 (eg, the outer surface) of the tooth, thereby forming a tooth 12 having the laser processed structure 100.

[0115] Figure 5A FIG. 1 is a front view schematic diagram of a laser processing structure according to an embodiment of the present invention. Figure 5B The laser processing structure of one embodiment of the present invention is as follows Figure 5A Schematic diagram of the cross-sectional structure along the cross-sectional line AA'. Figure 5C This is a three-dimensional schematic diagram of a laser processing structure according to an embodiment of the present invention. Figure 5A , Figure 5B and Figure 5CIn the laser processing step LPS, a laser beam 1100g of the laser processing system 1000 is used to form a laser processing structure 100 on the surface 40 of the tooth 10, including a plurality of micro grooves 110 and a plurality of micro bumps 120 between the micro grooves 110. The micro grooves 110 may be continuous long grooves, or discontinuous short grooves or holes. The micro bumps 120 may be continuous long bumps, or discontinuous short bumps or dot bumps, but are not limited thereto. The micro grooves 110 may, for example, include a first micro groove 110a along the D3 direction, and a second micro groove 110b along the D1 direction, wherein the first micro groove 110a and the second micro groove 110b are staggered. The laser beam 1100g of the laser processing system 1000 may be used to draw parallel lines on the surface 40 of the tooth 10 along the D3 and D1 directions to form the micro grooves 110a and 110b. By adjusting the line spacing of the laser beam 1100g, the pitch Pa between the micro grooves 110a and the pitch Pb between the micro grooves 110b can be adjusted. The pitch Pa between the micro grooves 110a can be, for example, between 0.5 microns and 500 microns, and the pitch Pb between the micro grooves 110b can be, for example, between 0.5 microns and 500 microns, but is not limited thereto. The pitch Pa and the pitch Pb can be the same or different. By adjusting the pitch Pa and Pb, the spacing between the micro bumps 120 can be relatively adjusted. The groove widths Wa and Wb of the micro grooves 110a and 110b can be, for example, between 0.5 microns and 500 microns, and preferably between 10 microns and 300 microns, but are not limited thereto. In a variant embodiment, the micro grooves 110a and the micro grooves 110b can also be made by drawing lines along the inclined direction between the D1 axis and the D3 axis to form diamond-shaped micro bumps. In another variation, another group of parallel micro grooves may be added to interlace with the micro grooves 110a and 110b to form triangular micro bumps. The micro grooves 110a and 110b are not limited to straight lines, but may be bent curves. The micro grooves 110a and 110b are staggered to form staggered quadrilateral or hexagonal micro bumps. In addition, the micro grooves 110a and 110b may also be curves with multiple periodic bends to form multiple periodically arranged micro bumps. Alternatively, the micro grooves 110a and 110b are randomly periodically bent curves to form randomly arranged micro bumps, but are not limited thereto.

[0116] Please refer to FIG. 5A to FIG. 5C, the micro grooves 110a and 110b have groove widths Wa and Wb. The size of the micro bump 120 can be adjusted by adjusting the pitches Pa and Pb and the groove widths Wa and Wb. The top widths Ta and Tb of the micro bump 120 are, for example, between 1 micron and 400 microns, and preferably between 10 microns and 300 microns, but are not limited thereto. The top surface size of the micro bump 120 can be, for example, between 1 micron × 1 micron and 400 microns × 400 microns, but are not limited thereto. By adjusting the energy distribution of the laser beam 1100g, the laser spot diameter of the laser beam 1100g and the beam profile of the laser beam 1100g can be adjusted. Therefore, when the laser beam 1100g is drawing a line, the desired groove widths Wa and Wb, as well as groove depths Da and Db (groove depth Db is not shown). The groove depths Da and Db of the micro grooves 110a and 110b can be, for example, between 0.5 microns and 500 microns, but are not limited thereto. The micro grooves 110a and 110b are not limited to V-shaped grooves, and the micro grooves 110a and 110b can also be formed into U-shaped grooves by adjusting the laser beam 1100g into a flat-top beam. By adjusting the side wall inclination angle θ of the micro grooves 110a and 110b, for example, it is between 1° and 80°, and preferably between 10° and 60°, but not limited. The incident light from the outside can be evenly reflected, refracted, diffracted or scattered to the front, so that the teeth 10 appear to have a whiter or whiter effect. The laser processing structure 100 on the outer surface 42 of the tooth 10 can even be designed to cause local interference of the reflected light to further enhance the whitening effect. For example, the minimum noticeable difference (Just Noticeable Difference; JND) of the reflected light before and after the laser processing structure 100 is completed can be measured respectively to judge the whitening effect, but it is not limited to this. The present invention can make the light reflection more uniform by adjusting the top surface size of the micro-bump 120 and the side wall inclination angle θ (the angle between the side wall and the vertical normal) of the micro-grooves 110a and 110b, thereby achieving a whitening effect, and there will be no pain or discomfort during the laser treatment step LPS process. In addition, due to the design of the micro-grooves 110a, 110b and the micro-bumps 120, the hydrophobicity of the tooth surface can be increased, thereby increasing the tooth's anti-fouling ability. At the same time, it can also reduce the adhesion of bacteria to the tooth surface through pili, flagella or sticky substances, thereby increasing the antibacterial ability of the tooth and avoiding the subsequent occurrence of caries or periodontal disease. In one example, the laser processing structure 100 can be achieved, for example, using a technology to form a laser induced periodic surface microstructure (Laser Induced Periodic Surface Structure; LIPSS), but is not limited to this.

[0117] Figure 6This is a schematic diagram of the structure of an artificial denture according to an embodiment of the present invention. Figure 2A , Figure 4 and Figure 6 The laser processing structure 100 of the present invention can be made on the crown surface 40A of an artificial tooth. The tooth 10 can be an artificial tooth, such as an artificial denture used for dental implantation, and can include, for example, an artificial crown 20A, a base 50 and an implant 60, but this is not limited. The tooth 10 can also be a real tooth, but this is not limited. The surface 40 of the tooth 10, for example, includes the surface 40A of the artificial crown. Among them, the material of the artificial crown 20A is, for example, metal material, ceramic material, metal sintered porcelain, and other materials. Metal materials are, for example, titanium alloy, palladium silver alloy, palladium gold alloy, palladium platinum alloy, etc., but this is not limited. Ceramic materials are, for example, zirconium oxide (zirconia), lithium silicate (lithiumsilicate), etc., but this is not limited. Metal sintered porcelain is, for example, a ceramic outer layer sintered on a metal inner layer, and the metal and ceramic are, for example, the above materials, but this is not limited. Other materials are, for example, resin materials, dentin, enamel, etc., but this is not limited. The laser processing structure 100 of the present invention can also be made on the surface of a denture veneer (not shown), and it is not excluded that it can be made on the surface of a real tooth. If zirconium oxide is used on the tooth surface, Yd:YAG laser or CO2 laser can be used, and the laser energy density and laser pulse width can be appropriately adjusted to avoid thermal deformation or cracking, and the laser spot diameter can be adjusted to achieve the best surface texture effect. If the tooth surface is enamel, a laser with a lower laser energy density and a wider laser spot diameter can be used to avoid thermal deformation and cracking of the material. Since enamel has a higher hardness, a longer laser pulse width and a lower laser pulse frequency can be used to achieve a higher texture effect. If the tooth surface is dentin, a higher laser energy density and a narrower laser spot diameter can be used to achieve a better cutting effect. Since dentin has a lower hardness, a shorter laser pulse width and a higher laser pulse frequency can be used to achieve a better texture effect. If the tooth 10 is an artificial tooth (such as an artificial denture for dental implant or a denture patch), the laser processing step LPS can be performed on the artificial tooth in advance, or after the artificial tooth is installed, and the execution order is not limited.

[0118] Fig. 7A This is a schematic diagram of using a laser treatment system to treat a user's teeth according to an embodiment of the present invention. Figure 7B This is a schematic diagram of a laser processing system according to another embodiment of the present invention, using a U-shaped slide rail for assistance. Figure 3 and Fig. 7AThe scanning unit 1400 of the present invention can be selectively arranged in the laser head 1600, so as to facilitate the operator to use the laser processing system 1000. A fiber optic lens (not shown) can be selectively arranged in the laser head 1600, connected to the operation screen, so as to facilitate the operator to move and operate the laser head 1600 to assist in aligning the teeth to be processed and to perform alignment, so as to accurately perform the laser processing step LPS. The user can wear a mouth opener 1700 and goggles in advance to avoid accidental damage caused by the laser beam in the laser head 1600. Please refer to Figure 3 and Figure 7B In addition to the aforementioned handheld laser head 1600, the scanning unit 1400 can also be selectively set on the linear U-shaped slide rail 1800 to assist the scanning unit 1400 in aligning the tooth to be processed 10. The linear U-shaped slide rail 1800 is used to automatically move and align the tooth to be processed, and the movement accuracy can reach 1 micron. The U-shaped slide rail 1800 can be moved to a fixed position using a connecting bracket 1900, which is convenient for the operator to use the scanning unit 1400 to perform the laser processing step LPS on the tooth surface. If the transmission unit 1300 uses an optical fiber, it can be selectively embedded in the connecting bracket 1900 to enhance the convenience and aesthetics of use.

[0119] Figure 8 This is a cross-sectional schematic diagram of a laser treatment system used to treat the outer surface of a tooth according to an embodiment of the present invention. FIG. 5A to FIG. 5C and Figure 8 In this embodiment, the laser beam 1100g of the laser processing system 1000 can be used to directly irradiate the user's teeth, forming the desired laser processing structure 100 on the outer surface 42U of the upper teeth and the outer surface 42L of the lower teeth, making the user's teeth 12 look whiter. In addition, the inner surface 46U of the upper teeth and the inner surface 46L of the lower teeth can be laser processed using a subsequent light guide unit.

[0120] Fig. 9 This is a cross-sectional schematic diagram of a laser treatment system used to treat the top surface of a tooth according to an embodiment of the present invention. FIG. 5A to FIG. 5C and Fig. 9In this embodiment, the light guide unit 2000 can be selectively used to perform the laser processing step LPS on the top side surface 44. The light guide unit 2000 may include a light guide portion 2200, a reflective portion 2300 and a support portion 2400. The reflective portion 2300 is connected to the light guide portion 2200, and the support portion 2400 is connected to the reflective portion 2300. In addition, a partition 2100 can be selectively provided in the middle of the light guide unit 2000 to prevent the laser beam 1100g from irradiating non-target areas. The light guide portion 2200, the reflective portion 2300 and the support portion 2400 are designed with tooth receiving grooves 2500 for the upper and lower rows of teeth, which are convenient for the user to bite and fix the teeth to be treated. The light guide unit 2000 can be integrated with the mouth opener 1700, for example, to enhance the convenience of use. The material of the light guide unit 2000 can be, for example, silicone, epoxy resin or acrylic, but is not limited to enhance the comfort of use. The reflective portion 2300 may be added with a reflective material such as metal to increase the reflectivity. The laser beam 1100g of the laser processing system 1000 may illuminate the light guide portion 2200, and the laser beam 1100g is reflected by the reflective portion 2300 to illuminate the top side surface 44U of the upper teeth and the top side surface 44L of the lower teeth, thereby forming the desired laser processing structure 100 on the top side surfaces 44U and 44L.

[0121] Fig.10 This is a cross-sectional schematic diagram of a laser treatment system used to treat the inner surface of a tooth according to an embodiment of the present invention. FIG. 5A to FIG. 5C and Fig.10 In this embodiment, the light guide unit 3000 can be selectively used to perform the laser processing step LPS on the inner surface 46. The light guide unit 3000 may include a light guide portion 3200, a reflective portion 3300 and a support portion 3400. The reflective portion 3300 is connected to the light guide portion 3200, and the support portion 3400 is connected to the reflective portion 3300. In addition, a partition 3100 can be selectively provided in the middle of the light guide unit 3000 to prevent the laser beam 1100g from irradiating non-target areas. The material of the light guide unit 3000 can be, for example, silicone, epoxy resin or acrylic, but is not limited, to enhance the comfort of use. The reflective portion 3300 can be added with reflective materials such as metal to increase the reflectivity. The light guide portion 3200, the reflective portion 3300 and the support portion 3400 are designed with tooth receiving grooves 3500 for the upper and lower rows of teeth, which are convenient for the user to bite and fix the teeth to be treated. The light guide unit 3000 can be integrated with the mouth opener 1700, for example, to improve the convenience of use. The laser beam 1100g of the laser processing system 1000 can illuminate the light guide part 3200, and the laser beam 1100g is reflected twice by the reflective part 3300 to illuminate the inner surface 46U of the upper teeth and the inner surface 46L of the lower teeth, thereby forming the desired laser processing structure 100 on the inner surfaces 46U and 46L.

[0122] Fig.11 This is a cross-sectional schematic diagram of a laser processing structure according to another embodiment of the present invention. FIG. 5A to FIG. 5C and Fig.11 In this embodiment, in addition to the first sub-step of the laser processing structure 100 of the previously formed micro-grooves 110 and micro-bumps 120, a second sub-step of forming a micro-nano processing structure 200 can be further performed on the surface of the micro-grooves 110 and micro-bumps 120 of the laser processing structure 100. The micro-nano processing structure 200 includes a plurality of micro-nano grooves 210 and micro-nano bumps 220 located between the micro-nano grooves 210. The micro-nano grooves 210, for example, have a groove width Wmn of about 0.5 microns to 10 microns, but are not limited thereto. The micro-nano bumps 220, for example, have a top width Tmn of about 0.5 microns to 10 microns, but are not limited thereto. In one embodiment, the second sub-step can replace another laser processing system or use the same laser processing system 1000, and can use different laser sources, or adjust the laser energy density and laser spot diameter to form smaller micro-nano grooves 210 and micro-nano bumps 220. For example, the laser spot diameter is about between 0.5 microns and 10 microns, but is not limited thereto. In a variant embodiment, by adjusting the transverse wave fundamental mode (TEM) of the laser spot, the energy distribution of the laser spot can be adjusted to form multiple peaks in the laser spot, thereby making it easier to form the desired micro-nano processing structure 200.

[0123] like Figure 5A , Figure 5B and Fig.11As shown, the groove width Wmn of the micro-nano groove 210 is smaller than the groove width Wa and Wb of the micro-groove 110, and the top width Tmn of the micro-nano bump 220 is smaller than the top width Ta and Tb of the micro-bump 120. Since the micro-nano groove 210 and the micro-nano bump 220 have a smaller width, the light scattering effect can be increased, thereby further increasing the whitening effect. In addition, the micro-nano groove 210 and the micro-nano bump 220 have superhydrophobicity, which makes the surface contact angle of the droplet exceed 120°, which can reduce the attachment of liquid with staining substances and further increase the anti-fouling effect. In addition, since the micro-nano groove 210 and the micro-nano bump 220 have a smaller width, it is more difficult for bacteria to attach to the tooth surface, which can further increase the antibacterial effect. In a variant embodiment, for example, the micro grooves 110 and micro bumps 120 in the laser processing structure 100 can be adjusted to appropriate structural conditions to enhance the whitening effect, and the structural conditions of the micro-nano grooves 210 and micro-nano bumps 220 in the micro-nano processing structure 200 can be adjusted to enhance the anti-fouling and antibacterial effects. In this way, the whitening and antibacterial effects can be enhanced respectively by the difference in structural conditions between the laser processing structure 100 and the micro-nano processing structure 200, but it is not limited. The pattern or other parts of the micro-nano processing structure 200 can be compared with the relevant description of the aforementioned laser processing structure 100, and will not be repeated here.

[0124] In another embodiment, the second sub-step can also appropriately select the laser processing system and laser parameters to form a laser induced periodic surface microstructure (LIPSS) on the surface of the micro grooves 110 and the micro bumps 120 of the laser processed structure 100, and achieve the desired micro-nano processed structure 200 through the LIPSS structure.

[0125] In another embodiment, the laser processing step of forming the LIPSS structure can also adjust the laser parameters appropriately, thereby adjusting the energy distribution of the laser spot. Multiple peaks are formed in the laser spot, and the energy in the center of the laser spot is the highest, and the energy gradually decreases outward. In this way, the micro-groove 110, the micro-nano groove 210 and the micro-nano bump 220 in the micro-groove 110 can be formed simultaneously during one laser irradiation process. Fig.11As shown. In addition, by greatly reducing the top width Ta and Tb of the micro-bump 120 between the micro-grooves 110, the groove widths Wa and Wb are made close to the pitches Pa and Pb. In this way, a mixed step of the first sub-step and the second sub-step can be achieved simultaneously during a single laser irradiation process. In other words, during the laser processing step LPS, a mixed step can also be used to perform the first sub-step and the second sub-step at the same time, thereby forming a laser processing structure 100 and a micro-nano processing structure 200 at the same time, thereby simplifying the operation process and shortening the operation time. The operator can adjust the processing conditions of the laser processing step LPS as needed, without limitation.

[0126] In summary, the tooth surface laser processing method and tooth surface laser processing system of the present invention can perform a laser processing step on the tooth surface to form a laser processing structure. The laser processing structure includes micro grooves and micro bumps, which can increase the reflection and scattering of incident light, thereby increasing the whitening effect. In addition, the micro grooves and micro bumps can also increase the hydrophobicity of the tooth surface, which can increase the anti-fouling and antibacterial effects. In addition, micro-nano grooves and micro-nano bumps can be further formed on the surface of the micro grooves and micro bumps to further enhance the whitening and antibacterial effects.

[0127] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent settings included in the spirit and scope of the claims are included in the scope of the present invention.

Claims

1. A tooth surface laser treatment method, applicable to a tooth, characterized in that: include: Preliminarily inspecting the tooth to obtain tooth information and determine that the tooth is suitable for a laser treatment step; Selecting a laser processing system according to the tooth information, and selecting according to the position and degree of a surface of the tooth to be processed, and loading a laser parameter; and The laser processing system is used to perform the laser processing step on the surface of the tooth to form a laser processing structure on the surface of the tooth, wherein the laser processing structure includes a plurality of micro grooves and a plurality of micro bumps between the micro grooves.

2. The tooth surface laser treatment method according to claim 1, characterized in that: The tooth includes an artificial crown.

3. The tooth surface laser treatment method according to claim 1, characterized in that: The surface of the tooth includes a crown surface.

4. The tooth surface laser treatment method according to claim 1, characterized in that: The laser-processed structure is formed on the surface of the tooth, including forming the laser-processed structure on an outer surface, a top surface or an inner surface.

5. The tooth surface laser treatment method according to claim 1, characterized in that: The forming of the micro grooves includes using a laser beam of the laser processing system to form a plurality of first micro grooves and a plurality of second micro grooves on the surface of the tooth, wherein the first micro grooves are staggered with the second micro grooves.

6. The tooth surface laser treatment method according to claim 1, characterized in that: The micro grooves have a pitch ranging from 0.5 micrometers to 500 micrometers.

7. The tooth surface laser treatment method according to claim 1, characterized in that: The micro grooves have a groove width ranging from 0.5 micrometers to 500 micrometers.

8. The tooth surface laser treatment method according to claim 1, characterized in that: The micro grooves have a groove depth ranging from 0.5 micrometers to 500 micrometers.

9. The tooth surface laser treatment method according to claim 1, characterized in that: The micro grooves have a side wall with an inclination angle ranging from 1° to 80°.

10. The tooth surface laser treatment method according to claim 1, characterized in that: The method also includes forming a micro-nano processing structure on the micro-bumps and the micro-grooves, including a plurality of micro-nano grooves and a plurality of micro-nano bumps between the micro-nano grooves.

11. The tooth surface laser treatment method according to claim 10, characterized in that: The micro-nano groove has a groove width that is smaller than a groove width of the micro groove.

12. The tooth surface laser treatment method according to claim 10, characterized in that: The laser processing step includes a mixing step to simultaneously form the laser processing structure and the micro-nano processing structure.

13. A tooth surface laser treatment system, characterized in that: include︰ a laser source emitting a laser beam; a scanning unit, receiving the laser beam and projecting the laser beam onto a surface of a tooth to form a laser-processed structure on the surface of the tooth, wherein the laser-processed structure includes a plurality of micro-grooves and a plurality of micro-bumps between the micro-grooves; A control unit is electrically connected to the laser source and the scanning unit to control the laser source and the scanning unit.

14. The tooth surface laser treatment system according to claim 13, characterized in that: The invention also comprises a transmission unit, which is connected with the laser source and the scanning unit and is used for transmitting the laser beam.

15. The tooth surface laser treatment system according to claim 14, characterized in that: The transmission unit includes a lens and a reflection mirror for transmitting the laser beam.

16. The tooth surface laser treatment system according to claim 13, characterized in that: The scanning unit includes a first laser galvanometer, a second laser galvanometer and a flat-field focusing lens. The first laser galvanometer and the second laser galvanometer control the irradiation position of the laser beam on the surface layer, and the flat-field focusing lens focuses the laser beam on the surface of the tooth.

17. The tooth surface laser treatment system according to claim 13, characterized in that: It also includes a U-shaped slide rail, and the scanning unit is arranged on the U-shaped slide rail to assist the scanning unit in aligning with the tooth.

18. The tooth surface laser treatment system according to claim 13, characterized in that: The invention also comprises a light guide unit for reflecting the laser beam to a top surface or an inner surface of the tooth.

19. The tooth surface laser treatment system according to claim 18, characterized in that: The light guide unit includes a light guide portion, a reflection portion and a support portion. The reflection portion is connected to the light guide portion, and the support portion is connected to the reflection portion.

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