WO2018166046A1 - Appareil de traitement dentaire à laser - Google Patents

Appareil de traitement dentaire à laser Download PDF

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Publication number
WO2018166046A1
WO2018166046A1 PCT/CN2017/082383 CN2017082383W WO2018166046A1 WO 2018166046 A1 WO2018166046 A1 WO 2018166046A1 CN 2017082383 W CN2017082383 W CN 2017082383W WO 2018166046 A1 WO2018166046 A1 WO 2018166046A1
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Prior art keywords
laser
laser generator
therapeutic apparatus
generator
wavelength
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PCT/CN2017/082383
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English (en)
Chinese (zh)
Inventor
王宇光
吕培军
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北京大学口腔医院
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Publication of WO2018166046A1 publication Critical patent/WO2018166046A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/0613—Apparatus adapted for a specific treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/067—Radiation therapy using light using laser light

Definitions

  • the invention relates to a dental laser therapeutic apparatus, belonging to the field of medical instruments.
  • Common oral diseases include infectious diseases (such as chronic periodontal disease, peri-implantitis and oral mucosal infections) and non-infectious diseases (such as tooth-sensitive diseases caused by tooth abrasion).
  • infectious diseases such as chronic periodontal disease, peri-implantitis and oral mucosal infections
  • non-infectious diseases such as tooth-sensitive diseases caused by tooth abrasion.
  • Epidemiological surveys show that the incidence of these two types of diseases is as high as 90% and 57%, respectively, so far there is still no effective treatment, the cure rate is less than 20%, seriously affecting the quality of life of patients, may induce and aggravate cardiovascular and cerebrovascular diseases Risk, endangering the lives of patients. Pain, slow healing, and recurrence are common clinical problems in these two major diseases.
  • Traditional physicochemical methods can achieve short-term effects, but long-term recurrence rates are high.
  • teeth In daily life, teeth often produce numbness and pain due to the effects of cold, hot and sour, which is what we call sensitive teeth. It refers to the transient and sharp symptoms of tooth soreness caused by exposed dentin in response to external stimuli such as temperature, chemical, mechanical, osmotic pressure, but cannot be attributed to any other form of tooth defect or lesion.
  • DH tooth sensitivity
  • pathological and physiological factors that cause enamel or cementum loss, which leads to dentin exposure, such as abrasion, gingival recession, improper brushing, excessive intake of acidic food, etc. .
  • Periodontitis is mainly chronic inflammation of periodontal support tissue caused by local factors. If phlegm is not treated in time, inflammation can progress to periodontitis by spreading the gums deep into the periodontal ligament, alveolar bone and cementum.
  • Photobiomodulation is a common technique for activating low-energy lasers with different specific wavelengths to activate mitochondria, block pain conduction, and laser antibacterial. It is better when the cells are in a low-nutrient state. Therefore, this technique is particularly suitable for the clinical treatment of common oral diseases.
  • the ultra-low-energy laser with a wavelength of about 540 nm, for example, 520-560 nm, blocks the protein TRPV1 responsible for pain transmission in the synapses in the dentinal tubules, increases the pain threshold of dentin, and blocks pain conduction. Reduce pain in patients with DH, which can achieve short-term results.
  • a laser with a wavelength of about 980 nm, such as 960-1000 nm, and a laser with a wavelength of about 540 nm have the same principle in treating tooth sensitivity, which can also block pain conduction, reduce pain in DH patients, and achieve short-term effects.
  • tissue regeneration function with high wavelength of about 808 nm, such as 788-828 nm low-intensity infrared laser, and high penetration, promote the production of a large amount of ATP in the pulp cells near the pulp, and improve the mitosis and osteogenic differentiation of dental pulp cells.
  • Odontoblast differentiation greatly increase the proliferation rate of vascular endothelial cells, ensure blood supply to the pulp, thereby promoting the third stage of dentin production, reaching the treatment of the tooth
  • the purpose of the disease is sensitive and can maintain long-term efficacy.
  • wavelengths of about 808nm such as 788-828nm can not only activate dental pulp stem cells to form a third phase of dentin to reduce the sensitivity of dentin sensitive recurrence, but also activate periodontal ligament cells and epithelial cells to promote periodontal tissue regeneration.
  • the inventors have also surprisingly discovered through research that three wavelengths are used (eg 520-560 nm, preferably 540 nm, 788-828 nm, preferably 808 nm and 1044-1084 nm, preferably 1064 nm or 960-1000 nm, preferably 980 nm, 788-828 nm, preferably 808 nm and 1044-1084 nm, preferably 1064 nm).
  • the laser is sensitive to the treatment of the patient's teeth, and the combination of the short, medium and long-term treatments described above seems to have produced some kind of synergistic effect, and its effect is not a simple superposition, which can achieve better therapeutic effects.
  • the inventors' study also found that the use of two-wavelength lasers to treat patients can also produce some synergistic effect.
  • the use of a wavelength of about 540 nm, for example, 520-560 nm and about 1064 nm, for example, 1044-1084 nm, can precisely control the regulation of the pain conduction signal pathway to achieve immediate analgesia, wherein a wavelength of about 980 nm, for example, 960-1000 nm can replace a laser having a wavelength of about 540 nm, for example, 520-560 nm.
  • the generator can use a wavelength of about 808 nm, for example, 788-828 nm and about 415 nm, for example, 395-435 nm, to activate the cellular immune mechanism and effectively kill the pathogenic bacteria for the purpose of treating periodontitis.
  • Blu-ray therapy is a new anti-infective optical therapy.
  • Endogenous Photosensitive substances which are excited by blue light, produce reactive oxygen by photochemical reaction, and act on important functional macromolecules such as proteins and nucleic acids of the cells.
  • blue light therapy does not require the use of exogenous photosensitizers, so it is not limited by the absorption and penetration depth of photosensitizers.
  • UVC short-wave ultraviolet
  • blue light does not directly act on DNA, so it induces tissue cell genes. The risk of mutation is small, and its ability to penetrate the skin and tissues is stronger than UVC, and the range of action is larger.
  • UVC short-wave ultraviolet
  • the inventors have also surprisingly discovered through research that the use of lasers of three wavelengths (eg, 788-828 nm, preferably 808 nm, 395-435 nm, preferably 415 nm, and 520-560 nm, preferably 540 nm) to treat patients with chronic periodontal disease appears to have produced some synergy.
  • the effect the effect is not a simple superposition, can achieve a better therapeutic effect.
  • a dental laser therapeutic apparatus comprising: a laser generator capable of emitting a laser of 520-560 nm, preferably 540 nm.
  • the laser generator is also capable of emitting a laser generator of 788-828 nm, preferably 808 nm laser, and 395-435 nm, preferably 415 nm laser.
  • the laser generator is also capable of emitting a laser generator of 788-828 nm, preferably 808 nm laser, and 1044-1084 nm, preferably 1064 nm laser.
  • the laser generator is further capable of emitting a laser generator of 960-1000 nm laser light, preferably 980 nm, or a laser capable of emitting a laser of 960-1000 nm, preferably 980 nm.
  • a generator is substituted for the laser generator capable of emitting a 520-560 nm laser.
  • the therapeutic apparatus further includes: a power module including a battery and a power detecting unit; a display screen and a control system, including: a communication unit for establishing short-range wireless communication And an execution unit for outputting a wavelength laser beam according to the execution request and a touch display unit; a refrigeration system corresponding to the laser generator; and a laser pen for irradiating the laser beam output by the laser generator to be Operating area.
  • a power module including a battery and a power detecting unit
  • a display screen and a control system including: a communication unit for establishing short-range wireless communication And an execution unit for outputting a wavelength laser beam according to the execution request and a touch display unit; a refrigeration system corresponding to the laser generator; and a laser pen for irradiating the laser beam output by the laser generator to be Operating area.
  • the therapeutic apparatus further includes: a foot switch that establishes a wireless communication connection with a communication unit of the display screen and the control system for triggering the laser generator.
  • the touch display unit is a 7-inch resistive touch screen.
  • the new laser band found can be used to treat or alleviate oral diseases;
  • the laser therapy device uses three wavelengths of lasers simultaneously for the treatment of tooth sensitivity, which can significantly reduce the pain caused by tooth sensitivity;
  • the operation is safe and simple, and it is worthy of clinical promotion.
  • Figure 1 is a block diagram showing the structure of a dental laser therapeutic apparatus of the present invention
  • FIG. 2 is a diagram showing the effect of killing an oral pathogen by a blue light having a wavelength of 415 nm;
  • Figure 3 is a graph showing the change in pain level after using a placebo, desensitizing toothpaste, a different wavelength, and a multi-wavelength laser therapeutic apparatus;
  • Figure 4 shows the depth of periodontal probing after treatment with a single-wavelength and multi-wavelength laser therapeutic apparatus. Change value.
  • the dental laser treatment apparatus 1 includes a power supply module 11, a laser generator 12, a refrigeration system 13, a display screen and control system 15, a foot switch 17, and a laser pointer 18.
  • the power module 11 includes a battery 111 and a power detecting unit 113.
  • the battery 111 can provide a plurality of different DC supply voltages depending on the condition of each power unit. After the battery 111 is rectified and filtered, the output is obtained, so that a stable direct current can be obtained, which can be applied to the power supply of the laser generator 12 and the refrigeration system 13.
  • the power module 11 further includes a power detecting unit 113 connected to the battery 111 for detecting the current power of the battery 111.
  • the power detecting unit 113 issues a warning message when it is detected that the current power of the battery 111 is less than a preset value (in one embodiment, the warning information may be flashing with a light or being displayed with a specific color light) to remind the operator The current state of charge of the battery 111, such that the operator determines whether to charge the battery 111 based on the alarm information.
  • a laser generator 12 for emitting a laser; a transmission fiber connected to the laser generator 12, a laser light generated by the laser generator 12; a laser pointer 18 at the end of the transmission fiber is connected to the transmission fiber, and the treatment object is treated with the laser light emitted by the laser generator 12; After the output power of the laser generator 12 is set, the laser generator 12 is activated to generate laser light.
  • the laser is coupled into the transmission fiber via a coupling device; conducted by the transmission fiber to the affected area for real-time treatment of the subject.
  • the laser generator 12 may be a laser diode.
  • the laser diode is based on the light-emitting diode, and an optical resonant cavity is added inside, and the emitted light is single-wavelength light with high intensity and good directivity.
  • the laser generator 12 is controlled by the execution unit 153 to generate and sequentially output laser beams of wavelengths of 540 nm, 808 nm, and 1064 nm or laser beams of 980 nm, 808 nm, and 1064 nm.
  • the operator steps on the pedal, and after the pedal is subjected to a downward force, the laser generator emits a laser with a wavelength of 540 nm.
  • the pedal After the laser pointer illuminates the human tooth, the pedal is subjected to an upward force, and the execution unit accepts Instructing that the laser generator turns off the laser that emits 540 nm; once again, the laser generator emits a laser with a wavelength of 1064 nm, and after the laser pen illuminates the human teeth, the laser is turned off after the pedal is subjected to an upward force. A laser of 1064 nm is emitted; the pedal is pedaled for the third time, and the laser generator emits a laser with a wavelength of 808 nm. After the laser pen illuminates the human tooth, the laser is turned off to emit a laser of 808 nm after the pedal is subjected to an upward force. . In the above description, the order of the respective wavelengths is not limited. Those skilled in the art know that the execution unit 153 accepts the indication of the foot switch 17 how to control the laser generator 12 to sequentially emit laser beams of three wavelengths.
  • the luminescence mechanism of a laser diode is excited light, that is, by oscillating a cavity in a laser diode to excite many photons of the same frequency to form a laser.
  • a positive bias voltage is applied across the laser diode, photons are released in the PN junction region due to recombination of electrons and holes.
  • some of the photons move in a direction perpendicular to the mirror surface, they are reciprocated in the cavity by the reflection of the mirror surface.
  • the applied positive bias current is large enough, the reciprocating motion of the photon will illuminate more photons of the same frequency, that is, oscillation occurs, thereby emitting laser light.
  • the transmission fiber has the characteristics of being easy to couple, light, and flexible when the transmission is satisfied. It can be one or more. Considering the volume of the whole device, this embodiment can also select two optical fibers. When one of the optical fibers fails, the device can still be used normally, and the device is improved. Stability.
  • the refrigeration system 13 is used to dissipate heat from various heat generating units (for example, laser generators) in the dental laser therapeutic apparatus 1 of the present invention to ensure normal operation.
  • the refrigeration system 13 starts to execute the refrigeration program; whether the laser generator 12 operates or not, the feedback output of the laser generator 12 is detected in real time; the detected feedback output of the laser generator 12 changes, That is, it is determined whether the amount of change in the feedback output of the laser generator 12 exceeds a preset threshold; if it is determined that the amount of change in the feedback output of the laser generator 12 does not exceed the preset threshold, the detection is continued; if the laser generator is determined
  • the adaptively adjusting the output power of the refrigeration system 13 includes: when the output fed back by the laser generator 12 becomes large, the display system and the control system 15 controls the refrigeration system 13 to increase the output power; when the laser generator 12 When the output value of the feedback becomes small, the display system and control system 15 controls the refrigeration system 13 to reduce the output power.
  • the display and control system 15 includes a communication unit 151, an execution unit 153, and a touch display unit 155.
  • the touch display unit 155 serves as an output input interface for providing display related system parameters. Information and issue an execution and/or update request after receiving the corresponding settings and/or manipulation actions.
  • the setting of device parameters can be achieved by the display screen and control system 15.
  • the display and control system 15 is a 7 inch resistive touch screen.
  • the present invention can adaptively perform setting of device parameters by using the touch display unit 155, providing greater selectivity and better pertinence.
  • the triggering of the laser generator can be carried out by an external switch, for example in the form of a foot switch.
  • the foot switch 17 establishes a wireless communication connection with the display screen and control system 15 for triggering the laser generator.
  • the display screen and control system 15 has a communication unit 151 for establishing short-range wireless communication.
  • the communication unit 151 establishes a wireless communication connection with the foot switch 17, and the wireless communication unit may be, for example, WLAN or WiMax. Or Bluetooth technology.
  • the foot switch 17 issues a command by a switch, and the communication unit 151 receives an information command and then transmits it to the execution unit to execute a command to switch the laser generator 12.
  • the foot switch 17 is used to trigger the laser generator 12.
  • the foot switch 17 can provide a pedal, and the operator can step on the pedal with the foot, and use the lower and upper movements of the pedal to realize the opening and closing of the laser generator 12, respectively.
  • the pedal is maintained in an initial stationary state, and the laser generator 12 is turned off; the pedal is moved downward after being subjected to a force, and the laser generator 12 is triggered to output a laser beam.
  • the frequency at which the pedals in the foot switch 17 perform the up and down operations determines the frequency at which the laser generator 12 performs the opening or closing.
  • the laser pointer 18 can be connected to the laser generator 12 through an optical fiber for irradiating the laser beam output from the laser generator 12 to the area to be operated in the oral cavity.
  • an optical fiber is connected to the end of the laser pointer 18, and the other end of the optical fiber is provided with a transposition interface, and the translating interface is connected to the laser generator 12.
  • the correct configuration prompt will be given (for example, the indicator light 19 in the indicator light is green), if they are not properly connected or the connection is not normal, it will also be given.
  • the end fiber of the laser pointer 18 is an optical fiber capable of supporting a diameter of 200 ⁇ m, 300 ⁇ m, 400 ⁇ m, 600 ⁇ m, 800 ⁇ m or 1000 ⁇ m.
  • the present invention recruited 40 patients with sensitive teeth as trial volunteers.
  • the trial was conducted between December 2015 and December 2016.
  • the age ranged from 27 to 88 years, with an average age of 57.64 years.
  • the test results are shown in Fig. 3.
  • One end of the vertical axis of the coordinate axis is 0, indicating no pain; the other end is 10, indicating severe pain; the middle portion indicates different degrees of pain.
  • the mean mean pain was 2.57 ⁇ 1.04; the mean moderate pain was 5.18 ⁇ 1.41; the mean severity of severe pain was 8.41 ⁇ 1.35. Methods for grading and testing pain values are well known to those skilled in the art.
  • Treatment group 1 method the laser treatment instrument laser wavelength is 980nm, the terminal output power does not exceed 300 mW, each irradiation for 6min, morning and evening, observe the effect.
  • Control effect As shown in curve 3 in Fig. 3, the laser treatment device with a wavelength of 980 nm was used. After 1 day, the pain level was reduced to moderate pain, but in the following 3 months, the pain level increased linearly. Severe pain is achieved, so it can be seen that the 980 nm laser treatment device can achieve short-term effects.
  • Treatment group 2 method the laser treatment instrument laser wavelength is 540nm, the terminal output power does not exceed 300 mW, each irradiation for 6min, morning and evening, observe the effect.
  • Control effect As shown in curve 4 in Figure 3, the laser treatment device with a wavelength of 540nm was used. After 1 day, the pain level was reduced to mild pain, but in the following 3 months, the pain level increased linearly. To achieve severe pain, it can be seen that the 540nm laser treatment device can achieve short-term effects; therefore, it can be seen that the mechanism of laser toothbrush with a wavelength of 540nm and a wavelength of 980nm is similar, and short-term effects can be achieved.
  • Treatment group 3 method the laser treatment instrument laser wavelength is 808nm, the terminal output power does not exceed 300 mW, each irradiation for 6min, morning and evening, observe the effect.
  • Control effect as shown in curve 5 in Figure 3, using a laser treatment device with a wavelength of 808nm, the pain level is reduced to moderate after 1 day. Pain, the pain value can be maintained for 1 month, and then the pain level is reduced to mild pain within 3 months; therefore, the 808nm laser treatment device can ensure long-term efficacy.
  • Treatment group 4 method the laser treatment instrument laser wavelength is 1064nm, the terminal output power does not exceed 300 mW, each irradiation for 6min, morning and evening, observe the effect.
  • Control effect as shown in curve 6 in Figure 3, using a laser treatment device with a wavelength of 1064nm, the pain level is reduced to mild pain after 1 day, the pain value can be maintained for 7 days, and then the pain level value within 3 months Increased to moderate pain; therefore, the 1064nm laser therapy device can guarantee mid-term efficacy.
  • the method of the treatment group 5 the laser treatment instrument has laser wavelengths of 540 nm, 1064 nm and 808 nm, and the terminal output power does not exceed 300 mW, and the operator steps on the pedal with the foot, and the pedal is subjected to the downward force, the laser The generator emits a laser with a wavelength of 540 nm, and the laser pen illuminates the human teeth for 2 min. After the pedal is subjected to an upward force, the laser generator turns off the laser light of 540 nm; the pedal is again pedaled, and the laser generator emits a wavelength of 1064 nm. Laser, the laser pen illuminates the human teeth for 2 min.
  • the laser generator After the pedal is subjected to the upward force, the laser generator turns off the laser emitting 1064 nm; the pedal pedal is used for the third time, and the laser generator emits a laser with a wavelength of 808 nm.
  • the pen illuminates the human teeth for 2 minutes, and after the pedal is subjected to an upward force, the laser generator turns off the laser light of 808 nm. In the morning and evening, observe the effect.
  • Control effect As shown in curve 7 in Fig. 3, after the patient is treated with multi-wavelength laser therapeutic apparatus, the pain level is reduced to mild pain and remains unchanged. Therefore, it can be known that the laser therapeutic apparatus has long-term effects on patients.
  • the laser generator After the pedal is subjected to an upward force, the laser generator turns off the laser emitting 1064 nm; the third foot When the pedal is stepped, the laser generator emits a laser having a wavelength of 808 nm, and the laser pointer irradiates the human tooth for 2 minutes. After the pedal is subjected to an upward force, the laser generator turns off the laser of 808 nm. In the morning and evening, observe the effect. Control effect: As shown in curve 8 in Fig. 3, after the patient is treated with multi-wavelength laser therapeutic apparatus, the degree of pain is reduced to mild pain and remains unchanged. Therefore, it can be known that the laser therapeutic apparatus has long-term effects on patients.
  • the desensitized toothbrush After a number of patients' therapeutic tests, the desensitized toothbrush has a therapeutic effect on sensitive teeth, the total effective rate is 100%, and the cure rate is 100%.
  • the present invention also recruited 25 patients with periodontitis as experimental volunteers.
  • the experiment was conducted between December 2015 and December 2016.
  • the age ranged from 27 to 88 years, with an average age of 60.16 years. .
  • the therapeutic components were 4 groups, and there was no significant difference in gender, age, and condition of each group, which was comparable.
  • Control group no treatment with laser therapy device
  • Treatment groups 1-3 were treated with laser treatment instruments with wavelengths of 540 nm, 415 nm, and 808 nm, respectively.
  • the specific method each irradiation for 6 minutes, once in the morning and evening, and observed after 3 months.
  • Treatment group 4 was treated with a laser treatment instrument with three wavelengths (540 nm, 415 nm, and 808 nm). The specific method was as follows: each wavelength was irradiated for 2 min, once in the morning and evening, and the effect was observed after 3 months.
  • PD is the depth of periodontal probing, which refers to the depth of painless insertion of the gingiva by the probe, which is an important indicator for clinical evaluation of periodontal damage. Characterization of periodontitis disease using ⁇ PD is well known to those skilled in the art.
  • the ordinate ⁇ PD refers to the change value of the periodontal probing depth after 3 months.
  • D It can be seen that the treatment of periodontitis without any wavelength of laser irradiation, ⁇ PD is negative, indicating that the periodontitis is more serious without intervention; after 540nm, 415nm and 808nm laser irradiation, ⁇ PD Both are less than 4, it can be seen that the periodontitis is controlled after laser irradiation with different wavelengths; when treated with laser treatment instruments of 540nm, 415nm and 808nm, the ⁇ PD is greater than 4, indicating that the three-wavelength laser therapeutic apparatus is used. The treatment of periodontitis works best.

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  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract

La présente invention concerne un appareil de traitement dentaire à laser, comprenant un module d'alimentation électrique, qui comprend un accumulateur et une unité de détection de source d'alimentation, un écran d'affichage et un système de commande, comprenant : une unité de communication, qui sert à établir une communication sans fil à courte portée ; une unité d'exécution qui sert à émettre, en fonction d'une requête d'exécution, un faisceau laser ayant une longueur d'onde ; une unité d'affichage tactile ; un générateur laser qui peut émettre un laser à 520-560 nm, de préférence 540 nm ; un système de refroidissement qui correspond au dispositif générateur laser ; et un crayon laser, qui sert à irradier un faisceau laser émis par le générateur laser vers une zone d'intervention.
PCT/CN2017/082383 2017-03-16 2017-04-28 Appareil de traitement dentaire à laser WO2018166046A1 (fr)

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CN201710157672.7A CN106730406A (zh) 2017-03-16 2017-03-16 一种牙科激光治疗仪
CN201710157672.7 2017-03-16

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BR102017013567A2 (pt) * 2017-06-22 2019-01-15 Rafael Figueiredo Da Silva dispositivo emissor de luz à base de diodo laser para biomodulação de tecidos e dor em hipersensibilidade dentinária sem uso de agentes químicos e/ou calor.
IT201800005693A1 (it) * 2018-05-24 2019-11-24 Apparecchiatura per trattamenti biofotonici tissutali

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101193605A (zh) * 2005-03-09 2008-06-04 宝洁公司 传感器响应电动牙刷及使用方法
CN202146047U (zh) * 2010-03-25 2012-02-22 阿卜杜拉·库尔卡耶夫 多功能牙刷
CN103239293A (zh) * 2013-05-16 2013-08-14 顶信光电(上海)有限公司 牙科半导体激光治疗仪

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101193605A (zh) * 2005-03-09 2008-06-04 宝洁公司 传感器响应电动牙刷及使用方法
CN202146047U (zh) * 2010-03-25 2012-02-22 阿卜杜拉·库尔卡耶夫 多功能牙刷
CN103239293A (zh) * 2013-05-16 2013-08-14 顶信光电(上海)有限公司 牙科半导体激光治疗仪

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