Oral cavity digital impression instrument and use method thereof

Abstract

The invention relates to the technical field of oral cavity impression instruments, in particular to an oral cavity digital impression instrument and a using method thereof.The impression instrument comprises a holding part, a laser emitting module, a photoelectric converter A, an air guide pipe and a supporting seat, a scanning head is arranged on the holding part, and an air blowing hole is formed in the scanning head; a scanning probe, a humidity monitoring module and a laser lamp holder are arranged on the scanning head; the laser emission module is connected with the laser lamp cap; the photoelectric converter A is connected with the scanning probe; the air guide pipe is communicated with the air blowing hole, and is provided with a branch pipe communicated with the heat dissipation hole; the supporting seat is connected with the holding part, a fan, a hollow cable, a photoelectric converter B and a control module are arranged on the supporting seat, the hollow cable is communicated with the output end of the fan and the equipment cabin, and the photoelectric converter B is connected with the photoelectric converter A and the control module. According to the invention, lossless return of detection signals is realized through two groups of photoelectric converters, and meanwhile, a drying function is embedded in a scanning process, so that the problems of tedious operation and insufficient precision in the traditional technology are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral impression devices, and particularly to an oral digital impression device and its usage method. Background Art

[0002] An oral digital impression device is a high-precision digital device that, through optical scanning or laser measurement technology, can obtain three-dimensional morphological data of hard and soft tissues such as teeth, gums, and mucous membranes in a patient's oral cavity in real time, replacing traditional physical impression methods. Its core function is to provide accurate digital diagnostic basis for oral restoration, orthodontics, implantology, and other treatments. Traditional devices have a bulky grip part due to the internal complex optical module, making it difficult to reach the posterior tooth area of the patient's oral cavity, which affects the scanning accuracy and operation efficiency.

[0003] Chinese Patent with Publication No. CN113648094B discloses a split-type oral digital impression device, including: a housing, a light source module, a lens group, an imaging sensor module, and a main control circuit module. The main control circuit module is placed outside the housing and is connected to the housing through a transmission cable. Through the split-type design, the heat dissipation inside the handheld part of the oral digital impression device, as well as the weight and volume of the handheld part, are effectively reduced.

[0004] However, this device still has the following deficiencies:

[0005] 1. Dependence on external drying: It is necessary to use an air gun or cotton roll additionally to isolate saliva. The drying step is separated from the scanning, prolonging the diagnosis and treatment time, and the exudation of saliva is likely to cause distortion of the scanning data.

[0006] 2. Lack of intelligence: It cannot dynamically adjust the drying intensity according to the oral environment, which is likely to cause discomfort to the patient or incomplete drying.

[0007] 3. The external connection line is easily affected by external electric fields, etc., and thus it is likely to cause more signal attenuation or loss. Summary of the Invention

[0008] The purpose of the present invention is to address the problems in the background art and propose an oral digital impression device and its usage method.

[0009] On the one hand, the present invention proposes an oral digital impression device, including a grip part, on which an equipment cabin is provided, heat dissipation holes are provided on the grip part, the grip part is detachably connected to a scanning head, an air blowing hole communicating with the inside of the grip part is provided on the scanning head, and a scanning probe, a humidity monitoring module, and a laser lamp head are provided on the scanning head;

[0010] A laser emission module, which is arranged in the equipment cabin and connected to the laser lamp head;

[0011] A photoelectric converter A, which is arranged in the equipment cabin and connected to the scanning probe;

[0012] An air duct is arranged in the equipment cabin and is communicated with the air blowing holes. A branch pipe communicated with the inside thereof is arranged on the air duct. The branch pipe is communicated with the heat dissipation holes. Control valves are arranged on both the air duct and the branch pipe.

[0013] And a support base is movably connected to the holding part. A fan, a hollow cable, a photoelectric converter B and a control module are arranged on the support base. The hollow cable connects the output end of the fan and the equipment cabin. The photoelectric converter B is connected to the photoelectric converter A and the control module.

[0014] Preferably, the scanning probe includes a CMOS sensor. The humidity detection module includes a humidity sensor. The humidity sensor is electrically connected to the control module. A plurality of humidity sensors are arranged around the circumference of the CMOS sensor.

[0015] Preferably, the laser emission module includes a semiconductor laser emitter. An optical fiber A is arranged on the semiconductor laser emitter. The semiconductor laser emitter is connected to the laser lamp head through the optical fiber A.

[0016] Preferably, an air collecting hood is arranged in the equipment cabin. The air collecting hood covers the outside of the heat dissipation holes. One end of the branch pipe far away from the air duct is inserted into the air collecting hood.

[0017] Preferably, the switching control valve includes a solenoid valve A and a solenoid valve B. The solenoid valve A is arranged on the air duct. The solenoid valve B is arranged on the branch pipe to control the air blowing holes to blow air or the heat dissipation holes to exhaust air through the solenoid valve A and the solenoid valve B.

[0018] Preferably, an optical fiber B is arranged at the input end of the photoelectric converter B. The photoelectric converter B is connected to the photoelectric converter A through the optical fiber B.

[0019] Preferably, the optical fiber B is located inside the hollow cable. The hollow cable includes an external waveguide and an internal cable core.

[0020] On the other hand, the present invention also provides a using method of an oral digital impression apparatus. Using the above oral digital impression apparatus, the method includes the following steps:

[0021] S1. Select an appropriate scanning head and connect it to the holding part;

[0022] S2. Connect the equipment to the power supply. Insert the scanning head into the oral cavity. Detect the humidity information of the area to be scanned through the humidity monitoring module. Start the fan according to the humidity feedback information. The fan blows air to the area to be scanned through the air duct and the air blowing holes to dry the tooth surface;

[0023] S3. The laser emission module emits laser to the dry area through the laser lamp head. The scanning probe scans the dry area and converts the detected optical signal into an electrical signal and then feeds it back to the photoelectric converter A;

[0024] S4. The optical - electrical converter A converts the electrical signal into an optical signal and transmits it back to the optical - electrical converter B. The optical - electrical converter B then converts the optical signal into an electrical signal and feeds it back to the control module. The control module processes the data, obtains the three - dimensional data of the scanned part, and generates a three - dimensional model.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] By setting a grip part and a support base with a split structure and placing the main control structure inside the support base, the overall volume of the grip part can be reduced, enabling the grip part to be further miniaturized, which is convenient for scanning work in the oral cavity. By setting a detachable scanning head, it is convenient to replace the scanning head for different tooth positions and is conducive to the cleaning and disinfection of the scanning head. By setting the structure of an air duct, branch pipes, and a switch control valve, and installing a turbine fan on the support base and a humidity sensor on the scanning head, the blowing holes can be controlled to blow air to dry the part to be scanned according to the data transmitted back by the humidity sensor, avoiding image blurring caused by the reflection of oral saliva or spit. During the process of exhausting air from the blowing holes or heat dissipation holes, it can effectively ensure that the internal structure of the grip part does not crash due to high temperature. In the present invention, an optical - electrical converter A is set inside the grip part, and an optical - electrical converter B is set inside the support base, thus forming an optical - electrical - optical - electrical conversion between the CMOS sensor and the PLC controller, avoiding the interference of external electric fields on the transmission of electrical signals, and minimizing the loss or attenuation of data during transmission even in the case of a long circuit. At the same time, the present invention also integrates an AI algorithm, which automatically analyzes the image clarity during the scanning process and makes timely blowing actions according to the image clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0028] Figure 2 It is a schematic connection structure diagram of each component on the scanning head;

[0029] Figure 3 It is a schematic internal structure diagram of the grip part;

[0030] Figure 4 It is a schematic connection structure diagram of each component on the support base.

[0031] Reference numerals: 1, holding part; 101, heat dissipation holes; 2, scanning head; 201, air blowing holes; 3, CMOS sensor; 31, infrared filter; 4, laser lamp head; 5, humidity sensor; 6, semiconductor laser emitter; 61, optical fiber A; 7, photoelectric converter A; 71, connecting cable; 8, air duct; 81, solenoid valve A; 9, branch pipe; 91, solenoid valve B; 10, air collecting hood; 11, support base; 12, turbine fan; 13, hollow cable; 14, optical fiber B; 15, photoelectric converter B; 16, PLC controller. Detailed implementation mode

[0032] Embodiment 1

[0033] As Figures 1 - 4As shown in the figure, an oral digital impression instrument proposed by the present invention includes a holding part 1, a laser emission module, a photoelectric converter A7, an air duct 8, and a support base 11. An equipment cabin is arranged on the holding part 1. A switch button, a blowing air volume adjustment button, and a heat dissipation hole 101 are arranged on the holding part 1. The holding part 1 is detachably connected to a scanning head 2. A male plug is arranged on the holding part 1, and a female slot adapted to the male plug is arranged on the scanning head 2. A damping anti-slip pad for preventing the free sliding of the scanning head 2 and the holding part 1 is arranged on the inner wall of the female slot. The pulling force range for the separation of the male plug and the female slot is 3 - 8N. A blowing hole 201 communicating with the inside of the holding part 1 is arranged on the scanning head 2. A check valve is arranged in the blowing hole 201. A hydrophobic coating is arranged on the inner wall of the air outlet of the blowing hole 201. A scanning probe, a humidity monitoring module, and a laser lamp head 4 are arranged on the scanning head 2. The scanning probe includes a CMOS sensor 3. The humidity detection module includes a humidity sensor 5. A plurality of humidity sensors 5 are arranged around the circumference of the CMOS sensor 3. The air flow direction blown out by the blowing hole 201 forms a 15° angle with the scanning optical path. The laser emission module includes, but is not limited to, a semiconductor laser emitter 6. The body of the semiconductor laser emitter 6 is arranged in the equipment cabin. An optical fiber A61 is arranged on the semiconductor laser emitter 6. The semiconductor laser emitter 6 is connected to the laser lamp head 4 through the optical fiber A61. The photoelectric converter A7 is arranged in the equipment cabin. A connection cable 71 is arranged on the photoelectric converter A7. The photoelectric converter A7 is connected to the scanning probe through the connection cable 71. The air duct 8 is arranged in the equipment cabin and communicates with the blowing hole 201. A branch pipe 9 communicating with the inside of the air duct 8 is arranged on the air duct 8. The branch pipe 9 communicates with the heat dissipation hole 101. Control valves are arranged on both the air duct 8 and the branch pipe 9. The switch control valves include a solenoid valve A81 and a solenoid valve B91. The solenoid valve A81 is arranged on the air duct 8, and the solenoid valve B91 is arranged on the branch pipe 9 to control the blowing of the blowing hole 201 or the exhaust of the heat dissipation hole 101 through the solenoid valve A81 and the solenoid valve B91. The support base 11 is movably connected to the holding part 1. A blower, a hollow cable 13, a photoelectric converter B15, and a control module are arranged on the support base 11. The blower includes, but is not limited to, a turbo blower 12. The motor of the turbo blower 12 uses a brushless motor, with a noise ≤ 40dB and a battery life ≥ 4 hours. The body of the turbo blower 12 is arranged on the support base 11. The output end of the turbo blower 12 communicates with one end of the hollow cable 13. The control module includes, but is not limited to, a PLC controller 16. The output end of the hollow cable 13 communicates with the equipment cabin. The photoelectric converter B15 is electrically connected to the control module. An optical fiber B14 is arranged at the input end of the photoelectric converter B15. The photoelectric converter B15 is connected to the photoelectric converter A7 through the optical fiber B14. The optical fiber B14 is located inside the hollow cable 13. The hollow cable 13 includes an external waveguide and an internal cable core.The CMOS sensor 3, humidity sensor 5, semiconductor laser emitter 6, solenoid valve A81, solenoid valve B91, and turbine fan 12 are all electrically connected to the PLC controller 16. At the same time, the PLC controller 16 integrates an AI algorithm to synchronously analyze the image clarity during the scanning process. If saliva reflection or water mist interference is detected, the enhanced drying mode is automatically triggered, and the enhanced drying mode is achieved by increasing the air supply speed of the turbine fan 12.

[0034] In this embodiment, a streamlined holding part 101 is adopted, with a length ≤ 12 cm and a diameter ≤ 3 cm, which conforms to ergonomics; the scanning head 2 is detachable and replaceable to adapt to different tooth positions (such as a narrow head for anterior teeth, a wide-angle head for posterior teeth, etc.). Before actual operation, the corresponding scanning head 2 needs to be selected according to the tooth position. The scanning head 2 is inserted into the oral cavity, and the semiconductor laser emitter 6 is started to light up the laser lamp head 4. At this time, the humidity sensor 5 keeps running and starts to detect the humidity of the scanning part of the scanning probe to determine whether to start the drying program according to the humidity value. When the humidity is small and does not affect the clarity of the scanned image, the solenoid valve A81 is closed, the solenoid valve B91 is opened, and the turbine fan 12 is started to blow air into the equipment cabin. After the air flow exchanges heat with the structure in the equipment cabin, it is discharged from the heat dissipation hole 101. When the humidity is large, the solenoid valve A81 is opened, the solenoid valve B91 is closed. At this time, the air blowing hole 201 blows air towards the scanned part to dry the part, and to avoid image acquisition blurring caused by the saliva or saliva reflection generated during the scanning process of the scanning probe. And during the scanning process, it is determined whether the patient is a child through image recognition and the AI algorithm. If it is a child, the air blowing speed is kept low to avoid irritating the oral mucosa of the child. After receiving the reflected light signal, the CMOS sensor 3 converts the light signal into an electrical signal and transmits it back to the photoelectric converter A7. The photoelectric converter A7 converts the electrical signal into a light signal and feeds it back to the photoelectric converter B15 through the optical fiber B14. The photoelectric converter B15 then converts the light signal into an electrical signal and transmits it to the PLC controller 16, converting the traditional electrical transmission signal into an optical transmission signal, effectively improving the signal anti-interference ability and avoiding signal loss or attenuation.

[0035] Embodiment 2

[0036] As Figure 1 and Figure 2 shown, an oral digital impression instrument proposed by the present invention, compared with Embodiment 1, the CMOS sensor 3 is a 12-megapixel sensor, and an infrared filter 31 is provided inside the lens of the CMOS sensor 3.

[0037] In this embodiment, a clearer scanning image can be obtained through the high-definition sensor, which is beneficial to improving the accuracy of data and modeling during the oral impression process, while the infrared filter 31 effectively avoids the interference of infrared light from the internal heat source in the oral cavity on the CMOS sensor 3 to obtain reflected light data.

[0038] Embodiment III

[0039] The present invention also provides a method for using an oral digital impression device. Using the oral digital impression device described in Embodiment I or Embodiment II, it specifically includes the following steps:

[0040] S1. Select an appropriate scanning head 2 and connect it to the holding part 1.

[0041] S2. Connect the device to the power supply. Insert the scanning head 2 into the oral cavity, detect the humidity information of the area to be scanned through the humidity monitoring module, start the blower according to the humidity feedback information. The blower blows air to the area to be scanned through the air duct 8 and the air blowing hole 201 to dry the tooth surface.

[0042] S3. The laser emission module emits laser to the dry area through the laser lamp head 4. The scanning probe scans the dry area, and converts the detected optical signal into an electrical signal and then feeds it back to the photoelectric converter A7.

[0043] S4. The photoelectric converter A7 converts the electrical signal into an optical signal and transmits it back to the photoelectric converter B15. The photoelectric converter B15 then converts the optical signal into an electrical signal and feeds it back to the control module. The control module processes the data and uploads the scanning data to the cloud server to generate the prosthetic adaptation parameters through edge computing.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims

1. An oral digital impression instrument, characterized in that Comprising: A holding part (1), on which an equipment cabin is arranged, heat dissipation holes (101) are arranged on the holding part (1), the holding part (1) is detachably connected to a scanning head (2), an air blowing hole (201) communicating with the inside of the holding part (1) is arranged on the scanning head (2), and a scanning probe, a humidity monitoring module and a laser lamp head (4) are arranged on the scanning head (2); A laser emission module, which is arranged in the equipment cabin and connected to the laser lamp head (4); A photoelectric converter A (7), which is arranged in the equipment cabin and connected to the scanning probe; An air duct (8), which is arranged in the equipment cabin and communicated with the air blowing hole (201), a branch pipe (9) communicating with the inside thereof is arranged on the air duct (8), the branch pipe (9) is communicated with the heat dissipation hole (101), and control valves are arranged on both the air duct (8) and the branch pipe (9); And a support base (11), the support base (11) is movably connected to the holding part (1), a blower, a hollow cable (13), a photoelectric converter B (15) and a control module are arranged on the support base (11), the output end of the blower is connected to the equipment cabin through the hollow cable (13), and the photoelectric converter B (15) is connected to the photoelectric converter A (7) and the control module.

2. The oral digital impression instrument according to claim 1, characterized in that, The scanning probe includes a CMOS sensor (3), the humidity detection module includes a humidity sensor (5), the humidity sensor (5) is electrically connected to the control module, and a plurality of humidity sensors (5) are arranged around the circumference of the CMOS sensor (3).

3. The oral digital impression instrument according to claim 1, characterized in that, The laser emission module includes a semiconductor laser emitter (6), an optical fiber A (61) is arranged on the semiconductor laser emitter (6), and the semiconductor laser emitter (6) is connected to the laser lamp head (4) through the optical fiber A (61).

4. The oral digital impression instrument according to claim 1, characterized in that, An air collecting hood (10) is arranged in the equipment cabin, the air collecting hood (10) covers the outside of the heat dissipation hole (101), and one end of the branch pipe (9) far away from the air duct (8) is inserted into the air collecting hood (10).

5. The oral digital impression instrument according to claim 1, characterized in that, The switch control valve includes a solenoid valve A (81) and a solenoid valve B (91), the solenoid valve A (81) is arranged on the air duct (8), the solenoid valve B (91) is arranged on the branch pipe (9), so as to control the air blowing hole (201) to blow air or the heat dissipation hole (101) to exhaust air through the solenoid valve A (81) and the solenoid valve B (91).

6. The oral digital impression instrument according to claim 1, wherein An optical fiber B (14) is arranged at the input end of the photoelectric converter B (15), and the photoelectric converter B (15) is connected to the photoelectric converter A (7) through the optical fiber B (14).

7. The oral digital impression apparatus according to claim 6, wherein, The optical fiber B (14) is located inside the hollow cable (13), and the hollow cable (13) includes an external waveguide and an internal cable core.

8. A method for using an oral digital impression device, which uses the oral digital impression device according to any one of claims 1-7, characterized in that, Including the following steps: S1. Select an appropriate scanning head (2) and connect it to the holding part (1); S2. Connect the equipment to the power supply, insert the scanning head (2) into the oral cavity, detect the humidity information of the area to be scanned through the humidity monitoring module, start the blower according to the humidity feedback information, and the blower blows air to the area to be scanned through the air duct (8) and the air blowing hole (201) to dry the tooth surface; S3. The laser emission module emits laser to the drying area through the laser lamp head (4), the scanning probe scans the drying area, and converts the detected optical signal into an electrical signal and then feeds it back to the photoelectric converter A (7); S4. The photoelectric converter A (7) converts the electrical signal into an optical signal and transmits it back to the photoelectric converter B (15). The photoelectric converter B (15) then converts the optical signal into an electrical signal and feeds it back to the control module. The control module processes the data, obtains the three-dimensional data of the scanned part and generates a three-dimensional model.

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