Scanning head, air pipe assembly, scanner and intraoral scanning system

Abstract

A scanning head (10), an air pipe assembly, a scanner (100) and an intraoral scanning system. The scanning head (10) comprises a housing (11) and a fluid jet module (3), wherein a scanning port (113) is formed at one end of the housing (11); and the fluid jet module (3) is arranged on the housing (11) and is configured to guide a fluid to flow at the scanning port (113). The present solution can acquire three-dimensional morphology data of tooth ^(61) edge lines of subgingival invisible parts, can obtain a relatively good scanning effect in a complex intraoral environment and improve the quality of scanning data, and can irrigate saliva (62) away from a scanning port (113), reducing or avoiding the risk of the saliva (62) dripping into the scanning head (113) and thus contaminating the scanner (100), such that a scanning main unit (50) can record a relatively clear image, reducing a scanning time for acquiring the clear image and improving the scanning efficiency, such that a data processing apparatus can acquire relatively accurate tooth (61) data, thus relatively accurately calculating the three-dimensional morphology data of an oral cavity of a patient.

Description

Scanning head, air duct assembly, scanner and oral scanning system Technical Field

[0001] The present disclosure relates to the technical field of oral medical devices, and in particular to a scanning head, an air duct assembly, a scanner, and an oral scanning system. Background Art

[0002] A digital oral impression scanner, also known as a scanner, uses an immersive optical scanning head to directly scan the patient's oral cavity, acquiring three-dimensional topography and color texture information of the surfaces of soft and hard tissues, such as teeth, gums, and mucosa. The complex and diverse oral environment can lead to significant interference in the 3D scan. Furthermore, since the optical system cannot penetrate the gums, it is difficult to obtain complete data for restorations such as subgingival preparations. Therefore, a scanner that can achieve superior scanning results within the complex oral environment is currently in demand. Summary of the Invention

[0003] The present disclosure provides a scanning head, an air duct assembly, a scanner, and an oral scanning system to achieve better scanning effects in a complex intraoral environment.

[0004] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by practice of the present disclosure.

[0005] According to a first aspect of the present disclosure, a scanning head is provided for use in a scanner, comprising: a housing having a scanning port formed at one end thereof; and a fluid ejection module disposed on the housing and configured to guide fluid to flow at the scanning port.

[0006] According to the scanning head disclosed in the present invention, by arranging a fluid injection module on the shell and using the fluid injection module to guide the fluid to flow toward the scanning port, the fluid can blow away interference factors such as debris that affect the scanning data, and dynamically push the gums aside to fully expose the subgingival shoulder, thereby obtaining three-dimensional morphological data of the tooth edge line of the invisible part under the gums. It can achieve better scanning effects in a complex oral environment and improve the quality of the scanning data. In addition, the fluid can also flush saliva away from the scanning port and the scanner, reducing or avoiding the risk of saliva dripping into the scanning head and contaminating the scanner, so that the scanning host can record clearer images, reduce the scanning time for obtaining clear images, improve scanning efficiency, and enable the data processing equipment to obtain more accurate tooth data, thereby more accurately calculating the three-dimensional morphological data of the patient's oral cavity.

[0007] According to a second aspect of the present disclosure, there is provided an air duct assembly for use in a scanner, comprising: an air duct including a hose and a hard tube, the hose being connected to one end of the hard tube and communicating with the hard tube, the hose being used to connect to a scanning host, and the hard tube being used to connect to a shell to guide the fluid to flow at a scanning port of the shell; an adapter, one end of the adapter being detachably connected to one end of the hose away from the hard tube and communicating with the hose, and the other end of the adapter being used to connect to a dental chair.

[0008] This application designs the air duct as a combination of a soft tube and a hard tube. The flexibility of the soft tube allows it to be flexibly set on the scanning host, and the rigidity of the hard tube ensures its stability on the shell, allowing the air duct to adapt to different usage environments and needs. This can prevent the air duct from shaking during use and interfering with the normal use of the oral scanning system, thereby improving the scanning effect of the oral scanning system. The fluid guided by the hard tube can blow away debris and other interference factors that affect the scan data, and dynamically push the gums apart to fully expose the subgingival shoulder, thereby obtaining three-dimensional topographic data of the tooth edge line of the invisible part of the subgingival part. In addition, the design of the adapter makes the connection between the soft tube and the dental chair detachable. This design not only facilitates installation and replacement, but also improves the maintenance convenience of the entire oral scanning system.

[0009] According to a third aspect of the present disclosure, a scanner is provided, comprising: a scanning host and a scanning head, wherein the scanning head is the scanning head described above as an example.

[0010] According to the scanner disclosed in the present invention, by arranging a fluid injection module on the shell and using the fluid injection module to guide the fluid to flow toward the scanning port, the fluid can blow away interference factors such as debris that affect the scanning data, and dynamically push the gums aside to fully expose the subgingival shoulder, thereby obtaining three-dimensional morphological data of the tooth edge line of the invisible part under the gums. It can achieve better scanning effects in a complex oral environment and improve the quality of the scanning data. In addition, the fluid can also flush saliva away from the scanning port and the scanner, reducing or avoiding the risk of saliva dripping into the scanning head and contaminating the scanner, so that the scanning host can record clearer images, reduce the scanning time for obtaining clear images, improve scanning efficiency, and enable the data processing equipment to obtain more accurate tooth data, thereby more accurately calculating the three-dimensional morphological data of the patient's oral cavity.

[0011] According to a fourth aspect of the present disclosure, an oral scanning system is provided, comprising: the above-mentioned scanner; a data processing device connected to the scanner, wherein the data processing device analyzes and calculates three-dimensional morphological data of the patient's oral cavity by receiving images recorded by the scanner.

[0012] According to the oral scanning system disclosed herein, by arranging a fluid injection module on the shell and using the fluid injection module to guide the fluid to flow toward the scanning port, the fluid can blow away interference factors such as debris that affect the scanning data, and dynamically push the gums aside to fully expose the subgingival shoulder, thereby obtaining three-dimensional morphological data of the tooth edge line of the invisible subgingival part. It can achieve better scanning effects in a complex oral environment and improve the quality of the scanning data. In addition, the fluid can also flush saliva away from the scanning port and the scanner, reducing or avoiding the risk of saliva dripping into the scanning head and contaminating the scanner, so that the scanning host can record clearer images, reduce the scanning time for obtaining clear images, improve scanning efficiency, and enable the data processing equipment to obtain more accurate tooth data, thereby more accurately calculating the three-dimensional morphological data of the patient's oral cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, serve to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and it is possible for a person skilled in the art to derive other drawings based on these drawings without inventive effort.

[0014] FIG1 is a schematic diagram showing a three-dimensional structure of a scanner according to this exemplary embodiment.

[0015] FIG. 2 shows an enlarged view of point A in FIG. 1 .

[0016] FIG. 3 shows a perspective view of the scanner in FIG. 1 from another perspective.

[0017] FIG. 4 shows a top view of the scanner in FIG. 1 .

[0018] FIG. 5 is an enlarged view of point B in FIG. 4 .

[0019] FIG. 6 shows a side view of the scanner in FIG. 1 .

[0020] FIG. 7 shows a bottom view of the scanner in FIG. 1 .

[0021] FIG8 is a cross-sectional view taken along line CC in FIG7 .

[0022] FIG. 9 is a schematic structural diagram of a scanner according to this exemplary embodiment.

[0023] FIG. 10 is a schematic structural diagram of a second fixer in FIG. 9 .

[0024] FIG. 11 is a schematic structural diagram of another second fixer in FIG. 9 .

[0025] FIG. 12 is a schematic perspective view showing the structure of yet another scanner according to the exemplary embodiment.

[0026] FIG. 13 is a schematic structural diagram of a first fixer in FIG. 9 .

[0027] FIG. 14 is a schematic perspective view showing the structure of another scanner according to the exemplary embodiment.

[0028] FIG15 shows a schematic structural diagram of the first wind direction control switch according to this exemplary embodiment.

[0029] FIG16 shows a schematic structural diagram of the second wind direction control switch according to this exemplary embodiment;

[0030] FIG17 shows a schematic structural diagram of the third wind direction control switch according to this exemplary embodiment.

[0031] FIG. 18 is a schematic perspective view showing the structure of yet another scanner according to the exemplary embodiment.

[0032] FIG. 19 is a cross-sectional view taken along line DD in FIG. 18 .

[0033] FIG20 is a schematic structural diagram of the adapter 90 in FIG18 .

[0034] FIG21 is a schematic structural diagram of the first fixing member in FIG18 . DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] 1 , the present application proposes an oral scanning system (not shown), including a scanner 100 and a data processing device.

[0037] The scanner 100 includes a scanning head 10 and a scanning host 50. The scanning host 50 is connected to the scanning head 10. When using the oral scanning system, the scanning head 10 can be placed in the patient's oral cavity. Light propagates in the scanner 100 so that the scanning host 50 scans the patient's oral cavity to record the image of the patient's oral surface and transmit the image information to the data processing equipment. The data processing equipment analyzes and calculates the three-dimensional morphological data of the patient's oral cavity based on the image information transmitted by the scanning host 50.

[0038] The scanning head 10 can be made of printing material, which can be resin or ceramic to eliminate the problem of static electricity causing interruption of the operation of the scanner 100; the scanning head 10 can also be a plastic structure, and the scanning head 10 can be a reusable structure or a disposable structure. In this way, the disposable structure is more convenient and hygienic when used.

[0039] The scanning host 50 may include a projector and an image sensor.

[0040] The data processing device may include a microcontroller. Specifically, the microcontroller may be a single-chip microcomputer, a CPU, or a GPU. Specifically, the data processing device may be a computer with a built-in microcontroller, or a mobile phone with a built-in microcontroller.

[0041] The oral scanning system may further include a display device connected to the data processing device, and the display device is configured to display the three-dimensional shape of the patient's oral cavity calculated by the data processing device, so that medical workers can process the calculated three-dimensional shape.

[0042] Specifically, the display device can be configured to display an image of the scanning area. When a medical worker uses the scanner 100 to scan a patient's oral cavity, the medical worker can observe the patient's oral cavity through the display device and move the scanner 100 based on the observed image, making the scanning operation simpler and reducing the medical worker's workload. The scanner 100, data processing equipment, and display device can be independent of each other or integrated.

[0043] It should be noted that the scanning head 10 or scanner 100 can be used not only in the field of oral scanning, but also in the field of industrial scanning, such as obtaining data of industrial products and industrial equipment, especially data inside holes. It can also be used in scanning fields such as facial scanners and professional scanners, and can realize three-dimensional reconstruction of objects or scenes such as faces, bodies, cultural relics, artworks, prostheses, medical devices, and buildings.

[0044] 2 , 3 and 4 , the scanning head 10 includes a housing 11 and a fluid ejection module 3 . A scanning port 113 is formed at one end of the housing 11 .

[0045] Specifically, the housing 11 is made of a printing material, which can be resin or ceramic to eliminate the problem of static electricity causing interruptions in the operation of the scanner 100. The housing 11 can also be made of plastic and can be a reusable structure or a disposable structure. In this way, the disposable structure is more convenient and hygienic when used. The housing 11 has an inner cavity 111. One end of the housing 11 is connected to the scanning host 50. A scanning port 113 is formed at the end of the housing 11 away from the scanning host 50 and is connected to the inner cavity 111. The fluid injection module 3 is disposed on the housing 11 and is configured to guide the fluid to flow at the scanning port 113, wherein the fluid injection module 3 can guide the fluid to be sprayed toward the scanning area facing the scanning port 113. The injection port of the fluid injection module 3 can be located inside the housing 11 where the scanning head 10 is located, or it can be located outside the housing 11 of the scanning head 10. It should be noted that the scanning area refers to the working scanning area of ​​the scanner 100, and the objects to be measured within the working scanning area can be scanned by the scanner 100.

[0046] Please refer to Figures 5, 6 and 7 together. The fluid injection module 3 is connected to the fluid supply device. The fluid generated by the fluid supply device is sprayed toward the scanning area facing the scanning port 113 through the fluid injection module 3. The fluid supply device can be integrated with the scanner 100 as a component of the scanner 100, or it can be independent of the scanner 100 as an independent device. The fluid injection module 3 is fixedly connected to the fluid supply device or detachably connected. For example, the fluid supply device can be an air supply device 5, which is connected to the fluid injection module 3, and the gas generated by the air supply device 5 is sprayed toward the scanning area facing the scanning port 113 through the fluid injection module 3. In the field of oral scanning, it can be used to blow open the gums (i.e., blowing the gums). Of course, if there are other needs, the fluid supply device can also be a liquid supply device.

[0047] Please refer to Figure 8. According to the scanning head 10 disclosed in the present invention, by arranging the fluid injection module 3 on the shell 11 and using the fluid injection module 3 to guide the fluid to flow toward the scanning port 113, the fluid can blow away interference factors such as debris that affect the scanning data, and dynamically push the gums away to fully expose the subgingival shoulder, thereby obtaining three-dimensional morphological data of the edge line of the tooth 61 of the invisible part under the gums, and can achieve better scanning effects in a complex intraoral environment and improve the quality of the scanning data. In addition, the fluid can also flush saliva 62 or mist away from the scanning port 113 and flush saliva 62 or mist away from the scanner 100, reducing or avoiding the risk of saliva 62 dripping into the scanning head 10 and contaminating the scanner 100, so that the scanning host 50 can record clearer images, reduce the scanning time for obtaining clear images, improve scanning efficiency, and enable the data processing equipment to obtain more accurate tooth 61 data, thereby more accurately calculating the three-dimensional morphological data of the patient's oral cavity.

[0048] In some embodiments of the present disclosure, the fluid injection module 3 includes a flow channel (not shown) provided in the housing 11, the input end of the flow channel is connected to the fluid supply device, and the output end of the flow channel is provided with an injection port. The flow channel is provided in the housing 11, and the flow channel and the housing 11 are integrally formed. In another embodiment, the fluid injection module 3 may also include a fluid delivery pipe 4 provided with a flow channel, the fluid delivery pipe 4 is installed in the housing 11, and the fluid delivery pipe 4 is fixedly installed or detachably installed with the housing 11. For example, a mounting port is provided on the housing 11, and the fluid delivery pipe 4 is passed through the mounting port. It can be seen that the fluid injection module 3 can be integrally formed with the housing 11, and the fluid injection module 3 can also be detachably connected to the housing 11.

[0049] The fluid injection module 3 is detachably connected to the housing 11. For example, the fluid injection module 3 can be detachably connected to the housing 11 by snapping, or the fluid injection module 3 can be detachably fixed to the housing 11 by fasteners. When gingival blowing scanning is not required, the fluid injection module 3 can be removed from the housing 11 to reduce the size of the scanning head 10, meet the patient's comfort requirements, and improve the overall performance of the scanner 100.

[0050] The sweeping area (i.e., the spraying area) of the fluid injection module 3 is at least partially located in the scanning area facing the scanning port 113. For example, the center of the sweeping area of ​​the fluid injection module 3 can be located at or close to the center of the scanning area facing the scanning port 113 so as to achieve center consistency. When configured to blow gums, the airflow blown out by the fluid injection module 3 blows toward the gums at the center of the scanning area. After the gums in the scanning area are blown open, subgingival scanning can be achieved. In this process, doctors are accustomed to pointing the center of the scanning area toward the target area to be tested in the oral cavity, and the center consistency setting can ensure that the airflow ejected by the fluid injection module 3 is sprayed toward the target area to be tested in the oral cavity in the scanning area. It should be noted that gum blowing generally requires the airflow to have a certain force, and by controlling the fluid flow rate, flow rate, pressure, etc., the airflow blown out by the fluid injection module 3 can form a spray effect, thereby effectively blowing the gums open. In one embodiment, the inner diameter of the injection port of the fluid injection module 3 gradually decreases along the injection direction, increasing the air pressure when the airflow is blown out, thereby ensuring the force of the airflow when blowing toward the gums.

[0051] When the scanning head 10 is placed in the patient's mouth for an oral scan, if it is necessary to scan an area covered by the gums (i.e., the subgingival area), the fluid jet module 3 is activated to spray gas toward the gums in the scanning area, blowing the gums apart and acquiring an image of the subgingival area. For example, the gas ejected by the fluid jet module 3 is used to blow apart the gums surrounding the tooth 61 to be scanned, acquiring an image of the subgingival shoulder of the tooth 61. Furthermore, the gas ejected by the fluid jet module 3 can be used to blow away saliva 62 splashed from the oral cavity, preventing it from falling into the inner cavity 111 through the scanning port 113 or reducing the amount of saliva 62 that falls into the inner cavity 111 through the scanning port 113, thereby avoiding or reducing the risk of saliva 62 dripping into the inner cavity 111 of the scanning head 10 and contaminating the scanner 100.

[0052] By arranging the fluid injection module 3 on the scanner 100, the fluid injection module 3 can follow the movement of the scanner 100 and realize linkage, so that the sweeping area of ​​the fluid injection module 3 is consistent with the scanning area of ​​the scanner 100. Medical workers only need to operate the scanner 100 to realize gum blowing scanning, without the need for additional gum blowing operation, thereby reducing the difficulty of operation during oral scanning.

[0053] The scanning head 10 further includes a reflector 12 disposed within the housing 11. The reflector 12 is disposed within the inner cavity 111 and is located at an end of the housing 11 away from the scanning host 50 (i.e., the reflector 12 and the scanning port 113 are located at the same end of the housing 11). The reflector 12 is configured to reflect light passing through the scanning port 113 toward the scanning host 50, and is also configured to reflect light projected by the scanning host 50 toward a scanning area facing the scanning port 113. The propagation path of the light is the inner cavity 111 of the scanning head 10. For example, referring to FIG. 3 , the housing 11 is generally cylindrical, the inner cavity 111 extends along the axial direction of the housing 11, the scanning port 113 is defined on the radially outer surface of the housing 11, and the reflective surface 121 of the reflector 12 is disposed at an angle to the axial direction of the housing 11.

[0054] Specifically, the scan head 10 is detachably connected to the scanning host 50. Medical workers can remove the scan head 10 from the scanning host 50 to clean and disinfect it, reducing the difficulty of sanitizing the scanner 100 and lowering their workload. When medical hygiene requirements are higher, medical workers can remove the old scan head 10 and replace it with a new one, eliminating the need to replace the entire scanner 100. This allows the scanning host 50 to be reused, reducing the cost of each oral scan using the scanner 100 and improving the overall performance of the scanner 100. The scanning host 50 can also accommodate scan heads 10 of different specifications based on scanning requirements. For example, scan heads 10 of different sizes can be used, with smaller scan heads 10 for pediatric oral scans and larger scan heads 10 for adult oral scans. Alternatively, scan heads 10 with different orientations, i.e., scan heads 10 with different orientations face different directions when installed in the scanning host 50, can be integrated with the scanning host 50.

[0055] In one embodiment, the fluid injection module 3 is configured to guide the fluid to be sprayed from the inside of the scanning port 113 to the outside. The fluid injection module 3 includes a first injection assembly, and the first injection assembly is configured to guide the fluid to be sprayed from the inside of the scanning port 113 to the outside. The first injection assembly is arranged to avoid the central area of ​​the inner cavity 111, and the central area of ​​the inner cavity 111 refers to the effective transmission area of ​​light in the inner cavity 111. The first injection assembly is arranged on the side of the shell 11 opposite to the scanning port 113. The first injection assembly includes a flow channel arranged on the shell 11, and the flow channel is arranged on the side of the shell 11 opposite to the scanning port 113. The flow channel passes through the inside and outside of the shell 11 and is connected to the inner cavity 111. The input end of the flow channel is located outside the shell 11 and can be connected to the air supply device 5. The output end of the flow channel is located on the inner side of the shell 11 (that is, the inner cavity 111), and the output end is formed with a nozzle. The nozzle of the first injection assembly is located in the area on the shell 11 that is directly opposite to the scanning port 113 (including the vicinity of the directly opposite area). Specifically, the injection port of the first injection assembly includes a first injection port 31, which is arranged toward the reflector 12, that is, the purge area of ​​the first injection port 31 is at least partially located on the reflector 12. By arranging the purge area of ​​the first injection port 31 to be at least partially located on the reflector 12, when the first injection port 31 ejects airflow, the airflow can be blown toward the reflector 12 and blown out from the scanning port 113. The airflow blown toward the reflector 12 can blow away the saliva 62 remaining on the reflector 12, preventing the saliva 62 on the reflector 12 from affecting the scanning accuracy. When the airflow is blown out from the scanning port 113, it can also blow away the saliva 62 splashed from the mouth and blow it toward the gums on both sides of the teeth 61.

[0056] When saliva 62 drips onto the reflector 12, the airflow can change the movement trajectory of the saliva 62, blow the saliva 62 away from the reflector 12, and blow it out of the inner cavity 111 from the scanning port 113. A layer of air film formed on the reflective surface 121 of the reflector 12 can prevent the saliva 62 from dripping onto the reflective surface 121 and blow the saliva 62 away from the reflector 12, effectively reducing the risk of saliva 62 dripping onto the reflective surface 121 and causing a decrease in scanning accuracy, thereby improving the reliability of the scanning head 10, ensuring the scanning accuracy of the scanner 100, and improving the reliability of the scanner 100.

[0057] For example, a plurality of first injection ports 31 may be provided, and the plurality of first injection ports 31 are arranged at circumferential intervals along the scanning port 113. Each first injection port 31 guides the gas to flow toward the center position of the scanning port 113, so that multiple streams of gas simultaneously block the scanning port 113, thereby more comprehensively blocking the scanning port 113 and effectively preventing saliva 62 from flowing from the scanning port 113 into the inner cavity 111.

[0058] In the description of the present disclosure, it should be understood that “plurality” means “two” or “more than two”.

[0059] 8 , the angle β between the ejection direction of the first ejection port 31 and the reflective surface 121 of the reflector 12 is greater than or equal to 10° and less than or equal to 45°. For example, the angle β between the ejection direction of the first ejection port 31 and the reflective surface 121 of the reflector 12 may be 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, or 45°.

[0060] It should be understood that the airflow will diffuse in the blowing direction after being blown out from the injection port of the fluid injection module 3. Therefore, the airflow blown out from the first injection port 31 is generally truncated cone-shaped, and the axis of the truncated cone-shaped airflow is in the injection direction of the first injection port 31.

[0061] The smaller the angle β between the ejection direction of the first ejection port 31 and the reflective surface 121 of the reflector 12, the greater the energy of the portion of the gas ejected from the first ejection port 31 that flows directly toward the scanning port 113, the more effectively the saliva 62 can be blown out of the inner cavity 111, and the more effectively the saliva 62 can be prevented from dripping onto the reflective surface 121. The larger the angle β between the ejection direction of the first ejection port 31 and the reflective surface 121 of the reflector 12, the greater the energy of the portion of the gas ejected from the first ejection port 31 that flows directly toward the reflective surface 121, the wider the coverage of the air film formed by the gas ejected from the first ejection port 31 on the reflective surface 121, the greater the energy of the air film, the more effectively the saliva 62 can be blown away from the reflective surface 121, the more effectively the saliva 62 can be prevented from accumulating on the reflective surface 121, and the more effectively the saliva 62 can be prevented from atomizing on the reflective surface 121.

[0062] By setting the angle β between the injection direction of the first injection port 31 and the reflecting surface 121 of the reflecting mirror 12 to be greater than or equal to 10° and less than or equal to 45°, the air flow intensity of the part blowing toward the scanning port 113 and the air flow intensity of the part blowing toward the reflecting surface 121 can be taken into account, so that the air flow ejected from the first injection port 31 can effectively and reliably blow the saliva 62 dripping onto the reflecting mirror 12 away from the reflecting mirror 12, and effectively and reliably blow the saliva 62 falling into the inner cavity 111 out of the inner cavity 111, thereby preventing the saliva 62 on the reflecting mirror 12 from affecting the scanning accuracy of the scanner 100.

[0063] 2 , 5 , and 8 , there are two first injection ports 31 . The inner cavity 111 extends along a first direction. The two first injection ports 31 are spaced apart along a second direction perpendicular to the first direction. The injection directions of the two first injection ports 31 intersect. Specifically, the injection centers of the two first injection ports 31 intersect along the centerline of the injection directions. The intersection points of the injection centers of the two first injection ports 31 along the centerline of the injection directions and the reflector 12 are dispersed along the second direction on the reflector 12 . The second direction is parallel to the reflective surface 121 of the reflector 12 .

[0064] When the two streams of gas blown out from the two first injection ports 31 flow onto the reflector 12, the two streams of gas can work together to form an air film with higher energy on the reflective surface 121, so that the air film formed on the reflective surface 121 of the reflector 12 can more effectively prevent saliva 62 from dripping onto the reflective surface 121, and reliably blow the saliva 62 away from the reflector 12, effectively preventing the saliva 62 on the reflector 12 from affecting the scanning accuracy of the scanner 100.

[0065] Moreover, by setting a gap between the two first injection ports 31 , the sweeping areas of the two gases can more comprehensively cover the reflective surface 121 , thereby more effectively preventing the saliva 62 from dripping onto the reflective surface 121 and improving the reliability of the scanning head 10 .

[0066] The injection port of the first injection assembly includes a second injection port 32, and the second injection port 32 is arranged toward the scanning port 113. The injection center of the second injection port 32 intersects with the scanning port 113 along the center line of the injection direction. Preferably, the second injection port 32 is arranged opposite to the scanning port 113, and the second injection port 32 injects airflow for blowing the gums. In this way, the airflow ejected from the second injection port 32 can directly pass through the scanning port 113 and be ejected toward the scanning area opposite to the scanning port 113, so that the airflow ejected from the second injection port 32 has sufficient force to blow open the gums when it is ejected to the gums of the patient in the scanning area, thereby improving the reliability of the fluid injection module 3; at the same time, this can reduce the collision between the airflow ejected from the second injection port 32 and the shell 11, reduce the noise generated when the second injection port 32 ejects airflow, reduce the noise generated when the scanner 100 is working, and improve the overall performance of the scanner 100.

[0067] The first jet port 31 and the second jet port 32 may be provided at the same time. The first jet port 31 is provided toward the reflection mirror 12 and configured to sweep the reflection mirror 12 . The second jet port 32 is provided toward the scanning port 113 and configured to sweep the gums.

[0068] In this way, sufficient airflow can be obtained to sweep the reflector 12 and the scanning port 113. After the saliva 62 falls into the inner cavity 111 from the scanning port 113, the airflow ejected from the two nozzles can reliably blow the saliva 62 out of the scanning port 113 and reliably disperse the saliva 62, thereby effectively reducing the amount of saliva 62 dripping onto the reflector 12 or preventing saliva 62 from dripping onto the reflector 12, so that the reflector 12 can form a clear image and improve the reliability of the scanning head 10.

[0069] The first and second injection ports 31, 32 can be located at multiple output ends of the same flow channel. When two first injection ports 31 are provided, the two first injection ports 31 can be symmetrically arranged about the second injection port 32. In one embodiment, two first injection ports 31 and one second injection port 32 can be arranged in a triangular pattern.

[0070] In addition, the second injection port 32 can also be arranged on the side of the scanning port 113 on the shell 11. At this time, the first injection port 31 and the second injection port 32 are located on both sides of the inner cavity 111, and flow channels are formed on both sides of the shell 11. One side of the flow channel is connected to the first injection port 31, and the other side of the flow channel is connected to the second injection port 32.

[0071] According to some embodiments of the present disclosure, the scanning head 10 further includes a second spray assembly, which is disposed outside the housing 11 and is configured to direct the fluid toward a scanning area facing the scanning port 113. The second spray assembly and the housing 11 may be integrally formed or detachably connected.

[0072] When the injection pressure of the fluid injection module 3 is relatively low, the second injection assembly can be turned on at the same time as the fluid injection module 3, so that the fluid injection module 3 and the second injection assembly simultaneously spray fluid outward, thereby increasing the pressure in the injection area of ​​the fluid injection module 3, thereby reliably blowing open the patient's gums and improving the reliability of the scanning head 10.

[0073] By detachably arranging the second injection assembly on the outside of the shell 11, when the fluid injection module 3 has sufficient injection pressure, the second injection assembly can be removed from the shell 11, reducing the size of the scanning head 10, so that the scanning head 10 has a larger movement space in the patient's mouth, making the scanning operation simpler.

[0074] 6 and 9 , in some embodiments of the present disclosure, the scanning head 10 further includes a gingival retraction assembly 7, which is detachably mounted on the housing 11. In one embodiment, the gingival retraction assembly 7 may include a gingival retraction probe 71, which is disposed near the scanning port 113 of the scanning head 10. In this embodiment, the gingival retraction probe 71 can be mounted on the scanning head 10 near the scanning port 113 by plugging or unplugging.

[0075] In another embodiment, the gingival retraction assembly 7 further includes a sleeve 72 configured to secure the gingival retraction probe 71. The sleeve 72 is disposed on the scanning head 10, and the gingival retraction probe 71 is disposed below the front end of the sleeve 72. In this embodiment, the gingival retraction probe 71 can be fixedly or detachably mounted in the sleeve 72, while the sleeve 72 is detachably mounted on the scanning head 10. By restricting the installation position of the gingival retraction probe 71 by the sleeve 72, the stability of the gingival retraction probe 71 and the degree of compatibility between the probe 71 and the scanning head 10 can be increased.

[0076] During intraoral scanning with the scanner 100, when data collection of the subgingival, non-exposed area is required, the gingival retraction assembly 7 can be installed on the scanning head 10, specifically, the sleeve 72 can be installed on the scanning head 10. For example, corresponding clips can be provided between the sleeve 72 and the scanning head 10, securing the sleeve 72 to the scanning head 10 via the clips. Once the sleeve 72 is secured to the scanning head 10, the gingival retraction probe 71 below the front end of the sleeve 72 is positioned near the scanning port 113. In this position, the gingival retraction probe 71 can easily pull back the gums, exposing the non-visible subgingival area.

[0077] In this embodiment, the detachable gingival retraction assembly 7 can be quickly and conveniently installed on the scanning head 10 when data collection of non-exposed subgingival tissue is required. The sleeve 72 can strengthen the fixation between the assembly and the scanning head 10 and limit the position of the gingival retraction probe 71 relative to the scanning head 10. The gingival retraction probe 71, positioned near the scanning port 113, is used to retract the gums and expose the subgingival shoulder. This allows the scanner 100 to project structured light onto the subgingival tooth 61 margin area during scanning, capturing three-dimensional topographic data of the subgingival tooth 61 shoulder margin.

[0078] To accommodate different gingival retraction needs, the front end of the gingival retraction probe 71 in this embodiment may be flat, rounded, or have other shapes. In some embodiments, to more intuitively check the subgingival depth of the gingival retraction probe 71, the gingival retraction probe 71 may be provided with scale lines. For example, starting from the incisal end of the gingival retraction probe 71, a plurality of annular scale lines may be provided on the gingival retraction probe 71. The multiple annular scale lines may be 0.1mm, 0.2mm, 0.3mm, etc. from the outside to the inside. The accuracy and maximum value of the scale lines can be flexibly set according to actual needs.

[0079] The fluid ejection module 3 includes an air duct 33 extending axially along the housing 11 ; the air inlet of the air duct 33 is connected to the outside, and the air outlet of the air duct 33 is at the scanning port 113 of the scanning head 10 , forming a blowing airflow toward the scanning port 113 of the scanning head 10 .

[0080] When using the scanner 100 for intraoral scanning, not only is the gingival retraction probe 71 required to retract the gums, but a good scanning environment is also required. Among them, after the scanning head 10 is inserted into the mouth of the user being tested, a thin mist is formed on the surface of the reflector 12 of the scanning head 10, and the gingival retraction probe 71 will cause bleeding when it pulls the gums apart. The blood, saliva 62, food and other debris in the mouth will all generate interference data, which will affect the optical imaging function. Therefore, the scanner 100 will not be able to accurately determine the three-dimensional model of the detection target. In response to the above situation, an air duct 33 is provided in the embodiment of the present disclosure to blow air into the oral cavity to form a blowing airflow. The blowing airflow can not only assist the gingival retraction probe 71 to more fully push the gums apart to expose the subgingival shoulder, thereby using structured light to project onto the edge line area of ​​the subgingival tooth 61 and obtain the three-dimensional morphological data of the edge line of the subgingival tooth 61; moreover, the blowing airflow can also reduce the interference factors that affect the scanning data in the scanning environment, so that better scanning imaging effects can be achieved in the complex intraoral environment, and the quality of the scanning data can be improved.

[0081] In this case, this embodiment is oriented with the scanning head 10 at the head and the scanning main unit 50 at the tail. The air inlet of the air duct 33 is located at the tail end of the scanning main unit 50, connecting to the outside world. The air outlet of the air duct 33 is located at the scanning port 113 of the scanning head 10. Specifically, the air inlet of the air duct 33 connects to the outside world, drawing in outside air; the air forms a blowing airflow within the air duct 33, which passes through the air duct 33 and is blown out at the air outlet of the air duct 33. The blowing airflow is used to dynamically displace the gums, causing the gingival margin to contract and exposing the gingival sulcus. Furthermore, the blowing airflow can disperse debris from the reflector 12 of the scanning head 10 and within the oral cavity, providing a clean environment for the current scanning area and thereby obtaining more complete and accurate scanning data.

[0082] Based on the above fluid injection module 3, another embodiment can be provided. In this embodiment, the gingival retraction probe 71 is a hollow cylindrical structure; the interior of the gingival retraction probe 71 of this structure is through-hole, allowing air circulation.

[0083] Based on this, in one example, the air outlet of the air duct 33 can be connected to the rear end of the gingival retraction probe 71 to form a blowing airflow at the front end of the gingival retraction probe 71. Specifically, the blowing airflow passes through the air duct 33 and the gingival retraction probe 71 in sequence and is blown out at the front end of the gingival retraction probe 71.

[0084] Alternatively, in another example, a sub-air duct extends from the air duct 33, and the air outlet of the sub-air duct is connected to the rear end of the gingival retraction probe 71, thereby forming a blowing airflow at the front end of the gingival retraction probe 71. Specifically, the blowing airflow passes through the air duct 33 in sequence and blows out a blowing airflow at the air outlet of the air duct 33. At the same time, the blowing airflow passes through the air duct 33, the sub-air duct, and the gingival retraction probe 71 in sequence, and blows out another blowing airflow at the front end of the gingival retraction probe 71. In this method, a sub-air duct extends from the air duct 33 specifically connected to the gingival retraction probe 71, thereby forming blowing airflows at both the air outlet of the air duct 33 and the front end of the gingival retraction probe 71, increasing the number and intensity of blowing airflows.

[0085] Gingival retraction in oral restorations often requires strong air pressure to open the gums. Therefore, to increase the pressure of the blowing airflow, this embodiment may include a fan at the air inlet of the air duct 33. The fan can use input mechanical energy to increase gas pressure and discharge the gas, creating a higher-pressure blowing airflow.

[0086] Of course, the blower in this embodiment can form a variety of blowing airflows with different wind pressure intensities by using the blower, which can better meet the requirements of different scenes for different wind pressures.

[0087] Furthermore, the air duct 33 can be a narrow, slit-like hose structure. It's conceivable that, given the same air volume, the narrower the air duct 33, the greater the air pressure. Therefore, in this embodiment, the air duct 33 is configured as a narrow, slit-like tubular structure. Furthermore, to facilitate changing the air outlet direction of the air duct 33, the air duct 33 can be constructed as a flexible, easily bendable hose structure.

[0088] In the above embodiment, the gingival retraction assembly 7 is configured to effectively retract the gums, and the air duct 33 is configured to generate a blowing airflow toward the scanning port 113, thereby reducing interference factors that may affect the scan data in the scanning environment. The simultaneous operation of the gingival retraction assembly 7 and the air duct 33 fully retracts the gums to expose the subgingival shoulder and provide a clean scanning environment, achieving better scanning imaging results and improving the quality of scan data in complex intraoral environments.

[0089] 9, 10, and 13, the fluid ejection module 3 further includes a first fixture 34 disposed on the housing 11 near the scanning port 113. The first fixture 34 is, for example, a spherical fixture, but other multi-degree-of-freedom fixtures are also possible and are not limited herein. The first fixture 34 is configured to secure the air duct 33 to the housing 11 and, by rotating the spherical rotor of the first fixture 34, change the direction of the air outlet of the air duct 33 to form airflows in different directions around the scanning port 113.

[0090] Under the rotation control of the spherical rotor of the first fixer 34, the direction of the air outlet of the air duct 33 can be changed. At the same time, the air outlet of the air duct 33 is located at the scanning port 113 of the scanning head 10, so that the air outlet of the air duct 33 can blow out air flows in different directions toward the scanning port 113. The air flows in different directions can dynamically push the gums apart from different angles, exposing the gingival sulcus more fully. Moreover, the air flows in different directions can blow away debris at different positions in the oral cavity, thereby improving the environmental cleanliness of the scanning area and facilitating obtaining more complete and accurate scanning data.

[0091] In this embodiment, the air duct 33 at the scanning host 50 has little effect on the direction of the air flow formed at the air outlet, which is almost negligible. Therefore, in this embodiment, the air duct 33 can be fixed to the scanning host 50 by adhesion. This fixing method is simple and low-cost.

[0092] In contrast, the air duct 33 on the housing 11 has a greater influence on the direction of the airflow formed at the air outlet. Therefore, the air duct 33 on the housing 11 can be provided with a greater degree of freedom to flexibly adjust the outlet direction of the air duct 33, thereby forming airflows in different directions around the scanning port 113. Therefore, the air duct 33 on the housing 11 can be fixed only by the first fixture 34. The air duct 33 between the first fixture 34 and the scanning host 50 is in a non-fixed state and can move freely. When the outlet direction of the air duct 33 needs to be adjusted, the user manually rotates the spherical rotor of the first fixture 34 to adjust the placement and angle of the air duct 33, thereby changing the outlet direction of the air duct 33 to form airflows in different directions around the scanning port 113.

[0093] Considering that the air duct 33 has too much freedom to be fixed by only the first fixator 34, it is easy to deviate, making it difficult for the user to control the direction of the air outlet of the air duct 33, resulting in an unstable air flow. Based on this, the second fixator 35 can be added in this embodiment.

[0094] In this embodiment, the fluid ejection module 3 further includes a second holder 35 configured to secure the air duct 33. The second holder 35 is disposed at a position on the housing 11 away from the scanning port 113; for example, the second holder 35 is disposed at a predetermined distance from the first holder 34, such as in the middle of the housing 11, near the connection between the scanning host 50 and the scanning head 10, or the like.

[0095] In one embodiment, the second holder 35 may be a holder that only serves to secure the air duct 33. Thus, the movable length of the air duct 33 is reduced from the second holder 35 to the first holder 34, limiting the flexibility and degree of freedom of the air duct 33 and making the air duct 33 easier to adjust and control.

[0096] In one embodiment, as shown in FIG10 , there are multiple second fixtures 35, and the multiple second fixtures 35 are distributed along the arc curve of the surface of the scanning head 10. For example, there are three second fixtures 35, which are distributed parallel to the left, middle, and right sides of the arc curve on the surface of the scanning head 10.

[0097] The second fixture 35 includes a first component 351 and a second component 352 that can be opened and closed. The first component 351 is fixed to the housing 11, and one end of the second component 352 is hingedly connected to the second component 352, specifically by using a bearing, hinge, etc.; the hinged second component 352 can be opened or closed on the first component 351. The interiors of the first component 351 and the second component 352 are both concave arc-shaped, and when the first component 351 and the second component 352 are snapped together, the concave arcs of the two form a complete circular area. When the second component 352 is opened, the air duct 33 can be placed within the concave arc of the first component 351, and then the second component 352 is snapped together with the first component 351 to fix the air duct 33 in the circular area defined by the concave arc.

[0098] In this embodiment, the air duct 33 can be fixed in any second fixer 35 , and the air duct 33 is subjected to stress between any second fixer 35 and the first fixer 34 , forming an air outlet direction different from the axial direction of the housing 11 .

[0099] In one example, the air duct 33 is fixed to the second right-hand holder 35. Because the first holder 34 is located in the middle of the upper surface of the housing 11, and the second holder 35 is located to the right, the first holder 34 is positioned to the left of the second right-hand holder 35. Consequently, a leftward stress is generated on the air duct 33 connecting the first and second holders 34, 35. Under this stress, the spherical rotor of the first holder 34 rotates leftward, shifting the air outlet of the air duct 33 to the left by a certain angle. This creates an airflow toward the scanning port 113 that is offset to the left relative to the axial direction of the housing 11. Specifically, referring to the air flow direction indicated by the arrow in Figure 9, the air is transmitted from the fan, passes through the second fixer 35 and the first fixer 34 on the right in turn through the air duct 33, and under the stress between the first fixer 34 and the second fixer 35, the air outlet of the air duct 33 is changed to be offset to the left by a certain angle, and the air outlet is also directed downward, so that a blowing airflow is formed at the scanning port 113 that is biased toward the lower left.

[0100] Under the action of the first fixture 34 and the three second fixtures 35 arranged in the left, center, and right directions, the air duct 33 can generate blowing airflows in the right, center, and left directions around the scanning port 113. Furthermore, the three second fixtures 35 arranged in the left, center, and right directions are merely illustrative; in practice, various configurations are possible. For example, a tooth preparation shoulder generally forms a circle around the prepared tooth, theoretically requiring the blowing airflow to be distributed in all directions. Therefore, four second fixtures 35 with different directions can be provided to control the air duct 33 to generate blowing airflows in four different directions.

[0101] In one embodiment, as shown in FIG11 , the second holder 35 is a single piece; a slide rail 114 is mounted on the housing 11 and matches the arc curve of the surface of the scanning head 10. The second holder 35 slides within the slide rail 114. Specifically, a first component 351 of the second holder 35 is mounted within the slide rail 114 and can slide freely leftward and rightward within the slide rail 114.

[0102] In this embodiment, the air duct 33 can be fixed in the second fixer 35. When the second fixer 35 slides in the slide rail 114, the air duct 33 is subjected to stress between the second fixer 35 and the first fixer 34, forming an air outlet direction different from the axial direction of the shell 11.

[0103] The specific manner in which the first fixer 34 and the sliding second fixer 35 are used to control the direction of the air outlet of the air duct 33 in this embodiment can be referred to the above embodiment and will not be described in detail here.

[0104] In this embodiment, the second fixer 35 can slide to any direction in the slide rail 114, thereby being able to control the air outlet of the air duct 33 to face more directions, and the angle difference between multiple directions can be flexibly adjusted conveniently, so that the wind direction can be flexibly controlled according to needs, making the direction of the blowing airflow more accurate, greatly improving the accuracy and convenience of controlling the direction of the air outlet.

[0105] In the above embodiment, the first and second fixtures 34 and 35 jointly control the air outlet of the air duct 33 in different directions, thereby controlling the direction of the airflow. Controlling the direction of the airflow accurately displaces the gums at the scanning position and exposes the subgingival shoulder, thereby improving the accuracy of the edge data of the preparation shoulder.

[0106] In some embodiments, the fluid ejection module 3 can be fixed to the outside or inside of the scanning mainframe 50 and the scanning head 10; for example, the fluid ejection module 3 can be fixed to the outer wall surface or the inner wall surface of the scanning mainframe 50 and the scanning head 10. The external fixing method can facilitate the installation and removal of the fluid ejection module 3, while the internal fixing method can reduce the possibility of the fluid ejection module 3 being shifted or dislodged due to external contact, and can also reduce the size of the intraoral scanner 100.

[0107] When the fluid injection module 3 is fixed to the outside of the scanning host 50 and the scanning head 10, the air duct 33 in the fluid injection module 3 is built into the pipe sleeve 72; the first fixer 34 and the second fixer 35 in the fluid injection module 3 are arranged inside the pipe sleeve 72 or pass through the pipe sleeve 72.

[0108] In one embodiment, the first fixer 34 and the second fixer 35 are arranged inside the tube sleeve 72; an operation window is opened at the position corresponding to the first fixer 34 and the second fixer 35 on the tube sleeve 72, and the operation window can facilitate the user to reach into the tube sleeve 72 to operate the first fixer 34 and the second fixer 35.

[0109] In another embodiment, as shown in FIG12 , the first and second holders 34 and 35 pass through a sleeve 72 ; a cushion is provided at the junction of the sleeve 72 with the first and second holders 34 and 35 . The cushion can reduce vibrations between the first and second holders 34 and 35 and the sleeve 72 during operation, and can also provide sealing and dustproof functions.

[0110] In the above scheme, the detachable gingival retraction component 7 can be quickly and conveniently installed on the scanning head 10 when it is necessary to collect data on the non-exposed subgingival area; the gingival retraction probe 71 located near the scanning port 113 is used to retract the gums and fully expose the subgingival shoulder, so that the three-dimensional morphological data of the edge line of the subgingival tooth 61 can be obtained during scanning, thereby improving the integrity of the scanning data.

[0111] 14 , in some embodiments of the present disclosure, the air duct 33 includes a main pipe 331 and multiple sub-pipes 332 extending from the main pipe 331 . The multiple sub-pipes 332 are configured to form blowing airflows in different directions around the scanning port 113 of the scanning head 10 .

[0112] In this embodiment, the main pipe 331 is fixed on the scanning host 50, and the multiple sub-pipes 332 are fixed on the scanning head 10; the air inlet of the main pipe 331 is connected to the outside world, and the air outlet of the main pipe 331 is connected to the air inlets of the multiple sub-pipes 332. The air outlets of the multiple sub-pipes 332 are distributed around the scanning port 113 of the scanning head 10, and the air outlets of the multiple sub-pipes 332 face different directions to form blowing airflows in different directions.

[0113] The air duct 33 in this embodiment can be fixed to the scanning host 50 and the scanning head 10 by means of adhesion or the like. This fixing method is simple and low in cost.

[0114] In a specific example, the air duct 33 can be fixed to the outside or inside of the scanning mainframe 50 and the scanning head 10, for example, by adhering the fluid ejection module 3 to the outer or inner wall of the scanning mainframe 50 and the scanning head 10. The external attachment method facilitates installation and removal of the fluid ejection module 3, while the internal attachment method reduces the risk of the fluid ejection module 3 shifting or falling off due to external contact, and can also reduce the size of the scanner 100.

[0115] Considering that there are multiple sub-tubes 332 and they are configured to form airflows in different directions, in order to prevent the sub-tubes 332 from falling off or deviating and affecting the direction of the airflow, this embodiment can provide a tube sleeve on the scanning head 10, with multiple sub-tubes 332 built in the tube sleeve.

[0116] In one example, the sleeve is a detachable structure independent of the scanning head 10 and the sub-tube 332. The sub-tube 332 is fixed to the scanning head 10. On this basis, the sleeve is installed on the scanning head 10 and the sub-tube 332 to strengthen the fixed relationship between the sub-tube 332 and the scanning head 10.

[0117] In another example, the sleeve and sub-tubes 332 are combined into a structure that is separate from the scanning head 10. The sleeve and sub-tubes 332 are integrated to secure the sub-tubes 332 to the sleeve, which then controls the position of the sub-tubes 332 and the direction of their air outlets. During use, the sleeve containing multiple sub-tubes 332 is installed on the scanning head 10, distributing the air outlets of the multiple sub-tubes 332 around the scanning port 113 of the scanning head 10. The air outlets of the multiple sub-tubes 332 face different directions, creating airflows in different directions around the scanning port 113 of the scanning head 10.

[0118] In some approaches, the tooth preparation shoulder is typically circumferentially around the prepared tooth, so theoretically, the airflow needs to be blown open in all directions. Based on this, in this embodiment, four sub-tubes 332 are typically provided, facing four different directions. This allows the gums to be dynamically displaced in four directions to fully expose the subgingival shoulder. Structured light is then projected onto the subgingival tooth 61 margin area to acquire three-dimensional topographic data of the subgingival tooth 61 margin.

[0119] When using the scanner 100 for intraoral scanning, not only is it necessary to retract the gums, but also to provide a good scanning environment. Among them, after the scanning head 10 is inserted into the mouth of the user being tested, the temperature difference between the inside and outside of the oral environment is large, which will cause a mist to form on the surface of the reflector 12 of the scanning head 10. Oral debris such as saliva 62, food, etc. will generate interference data, affecting the optical imaging function. Therefore, the above will cause the scanner 100 to be unable to accurately determine the three-dimensional model of the detection target. In response to the above situation, in the embodiment of the present disclosure, a main pipe 331 and multiple sub-tubes 332 are provided to blow air into the oral cavity to form a blowing airflow. The blowing airflow can effectively retract the gums to fully expose the subgingival shoulder, thereby using structured light to project to the subgingival tooth edge line area and obtain the three-dimensional morphological data of the subgingival tooth edge line; at the same time, the blowing airflow can also reduce the interference factors that affect the scanning data in the scanning environment, so that better scanning imaging effects can be achieved in the complex intraoral environment, and the quality of the scanning data can be improved.

[0120] Specifically, the air inlet of the main pipe 331 is connected to the outside world, and the outside air is drawn in. The air outlet of the main pipe 331 is connected to the air inlets of multiple sub-pipes 332, guiding the air into the sub-pipes 332, forming a blowing airflow in the sub-pipes 332, and the blowing airflow passes through the sub-pipes 332 and is blown out at the air outlet of the sub-pipes 332. The air outlets of the sub-pipes 332 are distributed around the scanning port 113 of the scanning head 10 and face different directions. Therefore, the blowing airflow blown out through the air outlet of the sub-pipes 332 can dynamically displace the gums, shrink the gum margin, and expose the gingival sulcus. In addition, the blowing airflow can blow away the debris in the reflector 12 of the scanning head 10 and the oral cavity, providing a clean environment for the current scanning area, thereby obtaining more complete and accurate scanning data.

[0121] Gingival retraction in oral restorations often requires strong air pressure to open the gums. Therefore, to increase the pressure of the blowing airflow, this embodiment may include a fan installed at the air inlet of the main pipe 331. The fan can use input mechanical energy to increase gas pressure and discharge the gas, creating a higher-pressure blowing airflow.

[0122] Of course, the blower in this embodiment can form a variety of blowing airflows with different wind pressure intensities by using the blower, which can better meet the requirements of different scenes for different wind pressures.

[0123] Furthermore, the plurality of sub-tubes 332 may all be slit-shaped tubular structures. It is conceivable that, under the same air volume, the thinner the pipe, the greater the air pressure. Therefore, in this embodiment, the sub-tubes 332 are configured as slit-shaped tubular structures.

[0124] In this embodiment, a wind direction control switch 8 is provided at the connection between the main pipe 331 and the multiple sub-pipes 332; the wind direction control switch 8 is configured to control the opening and closing of each sub-pipe 332 to guide the blowing airflow towards the air outlet direction of the opened sub-pipe 332.

[0125] Specifically, the wind direction control switch 8 can control the opening and closing of different sub-tubes 332, so that the opened sub-tubes 332 can form a blowing airflow, and the air outlets of different sub-tubes 332 correspond to different directions. In this way, the blowing airflow can be controlled in different directions. In short, this embodiment controls the direction of the blowing airflow by controlling the opening and closing of different sub-tubes 332 through the wind direction control switch 8. Controlling the direction of the blowing airflow can accurately move the gums at the scanning position and expose the subgingival shoulder, thereby improving the accuracy of the edge data of the preparation shoulder.

[0126] In order to flexibly control different sub-tubes 332, the wind direction control switch 8 in this embodiment can be implemented in multiple forms.

[0127] In one embodiment, as shown in FIG. 15 , the plurality of sub-tubes 332 are arranged in a ring shape, and the wind direction control switch 8 is a circular baffle structure composed of an opening component 81 and a shielding component 82 .

[0128] For example, four sub-tubes 332 are arranged in a ring, namely a, b, c, and d. Accordingly, to cover the four sub-tubes 332, the wind direction control switch 8 is configured as a circular baffle structure consisting of an opening component 81 and a blocking component 82. The opening component 81 is configured to connect the ventilation path between the sub-tubes 332 and the main tube 331 to form a blowing airflow, while the blocking component 82 is configured to block the ventilation path between the sub-tubes 332 and the main tube 331.

[0129] During use, the wind direction control switch 8 is turned. When the opening part 81 of the wind direction control switch 8 is placed on any sub-tube 332 among the multiple sub-tubes 332, the ventilation route between any sub-tube 332 and the main tube 331 is connected. At the same time, the sub-tubes 332 except any sub-tube 332 are blocked by the blocking part 82 and the ventilation route between them and the main tube 331 is blocked.

[0130] Specifically, referring to the air flow direction indicated by the arrow in FIG14 , the air is transmitted from the fan, passes through the main pipe 331, and reaches the wind direction control switch 8. The user uses the wind direction control switch 8 to select any one of the sub-pipes 332 to transmit the gas from the corresponding sub-pipe 332. The wind direction control switch 8 may include multiple gears, each gear corresponding to a sub-pipe 332, and the sub-pipe 332 corresponding to the opening part 81 is switched by switching the gears. Assume that the wind direction control switch 8 is turned until the opening part 81 and the sub-pipe a are aligned with each other; then, the main pipe 331 and the sub-pipe a form a complete ventilation route, and the air inhaled by the main pipe 331 flows through the sub-pipe a, and the blowing air flow is discharged at the air outlet of the sub-pipe a. The airflow direction of the blowing air flow at the scanning port 113 of the scanning head 10 is the direction in which the air outlet of the sub-pipe a is facing.

[0131] According to this embodiment, the user can control one of the sub-tubes 332 to blow air by controlling the wind direction control switch 8. Because the air outlets of the sub-tubes 332 are arranged around the scanning port 113 of the scanning head 10 and face different directions, the wind direction can be flexibly controlled according to needs, so that the direction of the blowing airflow can be more accurate.

[0132] In another embodiment, referring to Figures 16 and 17, multiple sub-tubes 332 are arranged in a straight line or an arc shape, and the wind direction control switch 8 is a baffle structure including multiple movable baffles 83. The baffles 83 correspond one-to-one to the sub-tubes 332 and are configured to block the ventilation route between the sub-tubes 332 and the main pipe 331; moving any baffle 83 in the wind direction control switch 8 allows any baffle 83 to open the ventilation route between the corresponding sub-tube 332 and the main pipe 331.

[0133] Specifically, as shown in FIG16 , when the plurality of sub-tubes 332 are arranged in a straight line, the plurality of movable baffles 83 in the wind direction control switch 8 are located on the same straight line, simplifying the structure of the wind direction control switch 8. As shown in FIG17 , when the plurality of sub-tubes 332 are arranged in an arc shape, the plurality of sub-tubes 332 conform to the arc shape of the scanning head 10, facilitating the installation of a larger number of sub-tubes 332.

[0134] The flap 83 in the air direction control switch 8 moves up and down to open or block the ventilation path between the sub-pipe 332 and the main pipe 331. For example, the flap 83 corresponding to sub-pipe c in Figures 16 and 17 moves above sub-pipe c, opening the ventilation path between sub-pipe c and the main pipe 331. Correspondingly, the other flaps 83 block the ventilation paths between sub-pipes a, b, and d and the main pipe 331, respectively.

[0135] In some embodiments of movable baffles 83, slide grooves are provided on both sides of each baffle 83 in the wind direction control switch 8, and the baffles 83 are slidably connected to the slide grooves; the baffles 83 slide within the slide grooves to open or block the ventilation route between the sub-pipe 332 and the main pipe 331. In this embodiment, the baffles 83 can slide to any position within the slide grooves, that is, they can slide to fully open the sub-pipe 332 (see Figure 17) or to half-open the sub-pipe 332 (see Figure 16). In this way, by controlling the sliding position of the baffles 83 within the slide grooves, the air volume and / or air pressure blown out of the sub-pipe 332 can be controlled.

[0136] In other embodiments of the movable blocking piece 83 , the blocking piece 83 is a self-locking push-and-pop structure that automatically locks when pressed once and automatically pops up when pressed again.

[0137] In this embodiment, air exits the blower, passes through the main pipe 331, and reaches the wind direction control switch 8, which includes multiple baffles 83. The user uses the wind direction control switch 8 to move one or more baffles 83 to select one or more sub-pipes 332 for air to be discharged from. In this embodiment, multiple baffles 83 can be moved at a time to simultaneously open ventilation routes between multiple sub-pipes 332 and the main pipe 331. Because the air outlets of different sub-pipes 332 face different directions, this method can generate airflow in multiple directions.

[0138] In the above solution, the fluid jet module 3 generates airflows in different directions at the scanning port 113 of the scanning head 10. This airflow can dissipate interference factors that affect the scan data, providing a clean environment conducive to scanning in the complex intraoral environment. Furthermore, the airflow dynamically displaces the gums to fully expose the subgingival shoulder, allowing light to illuminate the previously invisible subgingival portion, thereby acquiring three-dimensional topographic data of the subgingival tooth 61 edge line. Therefore, this solution can achieve better scanning results in complex intraoral environments and improve the quality of scan data.

[0139] 18 and 19 , in some embodiments of the present disclosure, the air duct 3 includes a hose 333 and a rigid tube 334. The hose 333 is connected to one end of the rigid tube 334 and communicates with the rigid tube 334. The hose 333 is located on one side of the scanning host 50, and the rigid tube 334 is configured to connect to the housing 11 to guide the fluid to flow at the scanning port 113. By designing the air duct 3 as a combination of the hose 333 and the rigid tube 334, the flexibility of the hose 333 allows for flexible placement on the scanning host 50, while the rigidity of the rigid tube 334 ensures stability on the housing 11. This allows the air duct 3 to adapt to different usage environments and requirements, prevents the air duct 3 from shaking under force during use and interfering with the normal use of the oral scanning system, and improves the scanning effect of the oral scanning system.

[0140] The air duct 3 also includes a bent tube 335 extending into the housing 11. The bent tube 335 is disposed at the end of the rigid tube 334 away from the flexible tube 333. The bent tube 335 has an air jet 3351, the inner diameter of which gradually decreases along the direction of injection. This increases the air pressure during the outflow, thereby ensuring the force of the airflow directed toward the gums. Extending the bent tube 335 into the housing 11 protects the bent tube 335, and air can be blown toward the teeth and gums through the bent tube 335, thereby opening the gums and exposing the underlying tissue. This allows for clear scanning of the subgingival tissue and acquisition of a clear image of the subgingival tissue. The air blowing is painless and easy to operate.

[0141] The air duct 3 also includes a transition duct 336, whose ends are connected to a rigid tube 334 and a flexible tube 333, respectively. The transition duct 336 is bent and positioned at the junction of the scanning host 50 and the housing 11. By connecting the rigid tube 334 and the flexible tube 333 at both ends of the transition duct 336, the air duct 3 can be adapted to the needs of different locations. The bendable design of the transition duct 336 increases the flexibility of the air duct 3, allowing it to adapt to different usage environments and angles. This design, in particular, reduces the impact of space constraints on the layout of the air duct 3 at the junction of the scanning host 50 and the housing 11.

[0142] A reflector 12 is disposed within the housing 11. A bent tube 335 is disposed on one side of the reflector 12. A side nozzle 3352 is formed on the outer periphery of the bent tube 335 and communicates with the air jet 3351. The side nozzle 3352 is disposed toward the reflector 12. When the air jet 3351 ejects air, the airflow is directed toward the reflector 12 and then out through the scanning port 113. The airflow directed toward the reflector 12 can remove any saliva 62 or mist remaining on the reflector 12, preventing the saliva 62 or mist on the reflector 12 from affecting scanning accuracy. Furthermore, when the airflow is blown out through the scanning port 113, it can also remove any saliva 62 splashed from the mouth and be blown toward the gums on both sides of the teeth. In addition, when saliva 62 drips onto the reflector 12, the airflow can change the movement trajectory of the saliva 62, blow the saliva 62 away from the reflector 12, and blow it out of the inner cavity 111 from the scanning port 113. A layer of air film formed on the reflector 12 can prevent the saliva 62 from dripping onto the reflector 12 and blow the saliva 62 away from the reflector 12, effectively reducing the risk of saliva 62 dripping onto the reflector 12 and causing a decrease in scanning accuracy, thereby improving the reliability of the scanning head 10, ensuring the scanning accuracy of the scanning head 10, and improving the reliability of the scanning head 10.

[0143] The angle α between the spray direction of the side nozzle 3352 and the reflector 12 is greater than or equal to 10° and less than or equal to 45°. By setting the angle β between the spray direction of the side nozzle 3352 and the reflector 12 to be greater than or equal to 10° and less than or equal to 45°, the airflow intensity of the portion blowing toward the scanning port 113 and the airflow intensity of the portion blowing toward the reflector 12 can be balanced. As a result, the airflow ejected from the side nozzle 3352 can effectively and reliably blow the saliva 62 dripping toward the reflector 12 away from the reflector 12, and effectively and reliably blow the saliva 62 falling into the inner cavity 111 out of the inner cavity 111, thereby preventing the saliva 62 on the reflector 12 from affecting the scanning accuracy of the scanning head 10.

[0144] The side nozzles 3352 are fan-shaped, so that the gas ejected from the side nozzles 3352 can more comprehensively cover the reflector 12 , thereby more effectively preventing the saliva 62 from dripping onto the reflector 12 and improving the reliability of the scanning head 10 .

[0145] The hose 333 is detachably connected to an adapter 90 away from the rigid tube 334. Referring to Figure 20 , the adapter 90 comprises an adapter body 91, an air inlet pipe 92, and an air outlet pipe 93. The air inlet pipe 92 and the air outlet pipe 93 are disposed on opposite sides of the adapter body 91 and communicate with each other. The air outlet pipe 93 is detachably connected to the fluid injection module 3, and the air inlet pipe 92 communicates with the dental chair. Specifically, the air inlet pipe 92 and the air outlet pipe 93 are both cylindrical structures. One end of the adapter 90 is detachably connected to the hose 333, and the other end is configured to be connected to the dental chair. This design allows the air duct 3 to be flexibly connected to the scanning host 50 and the dental chair; the air inlet duct 92 and the air outlet duct 93 are respectively arranged on opposite sides of the adapter body 91 and are connected. This structural design ensures that the gas can flow smoothly inside the adapter 90, thereby forming a stable fluid flow at the scanning port 113 of the shell; the existence of the adapter body 91 provides a stable structure, ensuring the stability and reliability of the air duct 3 during connection and use.

[0146] Adapter 90 also includes a sealing gasket 94, which is mounted around the outer periphery of the air inlet tube 92 and connected to the side of the adapter body 91 facing away from the air outlet tube 93. The primary function of sealing gasket 94 is to provide an airtight connection to prevent gas leakage. In adapter 90, sealing gasket 94 is mounted around the outer periphery of the air inlet tube 92 and connected to the side of the adapter body 91 facing away from the air outlet tube 93. This design ensures a tight seal at the connection between the air inlet tube 92 and the dental chair, preventing gas leakage. In medical or high-precision scanning equipment, sealing gasket 94 can prevent contaminants from entering the system, maintaining gas purity.

[0147] The outer periphery of the air outlet pipe 93 is provided with a plurality of step structures 931 at intervals, and the plurality of step structures 931 are arranged at intervals along the outlet direction of the air outlet pipe 93. The plurality of step structures 931 can increase the friction between the air outlet pipe 93 and the hose 333, thereby making the connection between the air outlet pipe 93 and the hose 931 more stable.

[0148] The scan head 10 also includes at least one first fixing member 101, which may be one, two, or three, but is not limited to these. The first fixing member 101 is mounted on the housing 11, and the rigid tube 334 is detachably mounted on the first fixing member 101. The first fixing member 30 may be in the shape of a circular ring or a square ring, and is disposed in a circle around the scan head 400. The first fixing member 101 provides a stable connection point, allowing the rigid tube 334 to be securely connected to the housing 11, ensuring the stability and reliability of the air duct 3 during use. Since the rigid tube 334 is detachably mounted on the first fixing member 101, it can be easily removed from or installed on the first fixing member 101 when replacement or maintenance is required, improving maintenance convenience. The use of the first fixing member 101 can reduce the risk of cross-contamination, especially in medical environments. Disposable use ensures clean and safe use each time. The first fixing member 101 and the housing 11 can be detachably connected, such as by snap-fitting or bolting, or they can be integrally formed.

[0149] Referring to Figure 21 , the first fixing member 101 includes a first component 1011 configured to connect to the housing 11. A first groove 1011a is defined on the side of the first component 1011 facing away from the scanning head 10, and the rigid tube 334 is retained within the first groove 1011a. The first fixing member 101, through the design of the first groove 1011a, stably secures the rigid tube 334 to the housing 11, ensuring that the air duct 3 does not shift due to movement or vibration during use, thereby ensuring the stability and reliability of the air duct 3. The rigid tube 334 is detachably attached to the first fixing member 101, allowing for quick and convenient removal when the air duct 3 needs to be replaced or maintained, thereby improving maintenance convenience.

[0150] The first fixing member 101 also includes a second component 1012. A second groove 1012a is defined on one side of the second component 1012. One end of the second component 1012 is rotatably connected to the first component 1011. The second component 1012a can be opened or closed on the first component 1011. When the first component 1011 and the second component 1012 are closed together, the rigid tube 334 is retained within the first groove 1011a and the second groove 1012a. The rotatable connection and the closed design between the first component 1011 and the second component 1012 can more securely secure the rigid tube 334, ensuring that the air duct 3 will not be displaced or fall off due to external forces during use.

[0151] The hose 333 is located on one side of the scanning unit 50. The hose 333 and the scanning unit 50 may be disconnected or removably connected. In one embodiment, the scanning head 10 further includes at least one second fixing member, which is removably connected to the hose 333 and configured to secure the hose 333 to the scanning unit 50, restricting its movement to prevent it from interfering with the physician's operation. The second fixing member may be one, two, or three, but is not limited thereto. Specifically, the second fixing member may be a buckle.

[0152] The scanning host 50 can be wired or wireless. When the scanning host 50 is wired, the second fixing member can be set on the wiring harness of the scanning host 50. When the scanning host 50 is wireless, the second fixing member is set on the body of the scanning host 50. The second fixing member and the scanning host 50 can be detachably connected, such as by a snap connection or a bolt connection, or can be integrally formed.

[0153] Please continue to refer to Figure 1. The present application proposes an oral scanning system, including a scanner, a data processing device and a dental chair. The scanner 100 includes a scanning head 10 and a scanning host 50. The scanning host 50 can be detachably connected to one end of the scanning head 10; the data processing device is connected to the scanner 100, and the data processing device analyzes and calculates the three-dimensional morphological data of the patient's oral cavity by receiving the image recorded by the scanner; the dental chair is connected to the scanner 100, and the dental chair and the scanner 100 can be detachably connected.

[0154] In some embodiments, the oral scanning system also includes a three-in-one dental gun, which is connected to the dental chair and the fluid injection module 3 and is configured to control whether the dental chair supplies air to the fluid injection module. During use, the dental chair can manually control the scanning head 400 to scan while simultaneously controlling the dental chair to supply or withhold air to the fluid injection module 3 using the three-in-one dental gun.

[0155] In some embodiments, the oral scanning system further includes a foot switch, which is connected to the dental chair and the fluid injection module 3, respectively, and is configured to control whether the dental chair supplies air to the fluid injection module 3. The dental chair 600 has multiple ports, and the fluid injection module 3 can be connected to any of these ports. During operation, a single person can perform the operation. That is, a single doctor can manually control the scanning head 400 to scan while simultaneously controlling the dental chair to supply or withhold air to the fluid injection module 3 by pressing the foot switch. By setting a foot switch to supply air or hold air to the fluid injection module 3, a doctor can complete the scanning operation alone, obtain three-dimensional topographic data of the tooth edge line of the invisible part under the gums, achieve better scanning results in a complex oral environment, improve the quality of the scanning data, and flush saliva away from the scanning port 113, reducing or avoiding the risk of saliva dripping into the scanning head and contaminating the scanner, so that the scanning host 50 can record clearer images, reduce the scanning time for obtaining clear images, improve scanning efficiency, and enable the data processing equipment to obtain more accurate tooth data, thereby more accurately calculating the three-dimensional topographic data of the patient's oral cavity, without the need for medical staff to assist in the operation. Compared with the current operation of one person controlling the scanning and one person controlling the air supply or holding the air, it has better industrial practicality.

[0156] The above describes the preferred exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, but it should be understood that the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0157] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and embodiments are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

Claims

1. A scanning head, used in a scanner, wherein: include: A housing, wherein a scanning port is formed at one end of the housing; The fluid injection module is disposed on the housing and is configured to guide the fluid to flow at the scanning port.

2. The scanning head according to claim 1, wherein: The shell has an inner cavity connected to the scanning port, and the fluid injection module includes a first injection component arranged in the shell, the first injection component is configured to guide the fluid to spray from the inside of the scanning port to the outside, and the first injection component is arranged to avoid the central area of ​​the inner cavity.

3. The scanning head according to claim 2, wherein: The first spraying assembly is arranged on a side of the housing opposite to the scanning port.

4. The scanning head according to claim 3, wherein: The first injection assembly includes a flow channel arranged in the shell, the flow channel is connected to the inner cavity, the input end of the flow channel is located outside the shell, the output end of the flow channel is located in the inner cavity and is formed with an injection port, and the injection port of the first injection assembly is arranged in an area on the shell facing the scanning port.

5. The scanning head according to claim 4, wherein: The scanning head also includes a reflector arranged on the shell, the reflector is arranged in the inner cavity, the reflector and the scanning port are located at the same end of the shell, and the injection port of the first injection assembly includes a first injection port, and the first injection port is arranged toward the reflector.

6. The scanning head according to claim 5, wherein: The included angle between the injection direction of the first injection port and the reflection surface of the reflection mirror is greater than or equal to 10° and less than or equal to 45°.

7. The scanning head according to claim 5, wherein: There are two first injection ports, the two first injection ports are spaced apart along the second direction, and the injection directions of the two first injection ports intersect; The inner cavity extends along a first direction, the first direction is perpendicular to the second direction, and the second direction is parallel to a reflecting surface of the reflecting mirror.

8. The scanning head according to claim 4, wherein: The jetting port of the first jetting assembly includes a second jetting port, and the second jetting port is arranged toward the scanning port.

9. The scanning head according to any one of claims 1 to 8, wherein: The fluid injection module comprises a second injection assembly, which is arranged outside the housing and is used to guide the fluid to be injected toward a scanning area facing the scanning port.

10. The scanning head according to any one of claims 1 to 8, wherein: The fluid ejection module is detachably connected to the housing.

11. The scanning head according to any one of claims 1 to 8, wherein: The fluid injection module has an injection port, and the inner diameter of the injection port gradually decreases along the injection direction.

12. The scanning head according to claim 1, wherein: The scanning head further comprises a gingival retraction component, which is detachably mounted on the housing. The gingival retraction component comprises a gingival retraction probe, which is arranged near the scanning port of the scanning head.

13. The scanning head according to claim 12, wherein: The gingival retraction assembly further comprises a sleeve for fixing the gingival retraction probe, wherein the sleeve is arranged on the housing, and the gingival retraction probe is arranged below the front end of the sleeve.

14. The scanning head according to claim 12, wherein: The front end of the gingival retraction probe is a flat head or a round head.

15. The scanning head according to claim 1 or 12, wherein: The fluid injection module comprises an air duct extending along the axial direction of the shell, the air inlet of the air duct is connected to the outside, and the air outlet of the air duct is located at the scanning port of the scanning head to form a blowing airflow toward the scanning port of the scanning head.

16. The scanning head according to claim 15, wherein: The gingival retraction probe is a hollow cylindrical structure; The air outlet of the air duct is connected to the rear end of the gingival retraction probe, or a sub-air duct is extended from the air duct, and the air outlet of the sub-air duct is connected to the rear end of the gingival retraction probe to form a blowing airflow at the front end of the gingival retraction probe.

17. The scanning head according to claim 15, wherein: The air duct is built inside the pipe sleeve.

18. The scanning head according to claim 15, wherein: The fluid injection module also includes a first fixture, which is arranged at a position of the shell near the scanning port. The first fixture is configured to fix the air duct to the shell and change the direction of the air outlet of the air duct by rotating the spherical rotor of the first fixture to form air blowing airflows in different directions around the scanning port.

19. The scanning head according to claim 18, wherein: The fluid ejection module further includes a second fixture configured to fix the air duct, wherein the second fixture is disposed at a position of the housing and away from the scanning port.

20. The scanning head according to claim 19, wherein: There are a plurality of second fixers, and the plurality of second fixers are distributed along an arc curve on the surface of the shell; The air duct is fixed in any one of the second fixers, and the air duct is subjected to stress between any one of the second fixers and the first fixer, so that an air outlet direction different from the axial direction of the shell is formed.

21. The scanning head of claim 19, wherein: The second fixture is one, a slide rail matching the arc curve of the shell surface is installed on the shell, and the second fixture slides in the slide rail; The air duct is fixed in the second fixture. When the second fixture slides in the slide rail, the air duct is subjected to stress between the second fixture and the first fixture, forming an air outlet orientation different from the axial direction of the shell.

22. The scanning head of claim 19, wherein: The first fixer and the second fixer are arranged inside the sleeve; and operation windows are provided at positions on the sleeve corresponding to the first fixer and the second fixer.

23. The scanning head of claim 19, wherein: The first fixer and the second fixer pass through the sleeve; a cushion is provided at the connection between the sleeve and the first fixer and the second fixer.

24. The scanning head of claim 15, wherein: The air duct includes a main pipe and a plurality of sub-pipes extending from the main pipe, and the plurality of sub-pipes are configured to form blowing airflows in different directions around the scanning port of the scanning head.

25. The scanning head of claim 24, wherein: The air inlet of the main pipe is connected to the outside, and the air outlet of the main pipe is connected to the air inlets of the multiple sub-pipes. The air outlets of the multiple sub-pipes are distributed around the scanning port of the scanning head, and the air outlets of the multiple sub-pipes face different directions to form blowing airflows in different directions.

26. The scanning head of claim 25, wherein: A wind direction control switch is provided at the connection between the main pipe and the plurality of sub-pipes; the wind direction control switch is configured to control the opening and blocking of each sub-pipe to direct the blowing airflow toward the air outlet direction of the opened sub-pipe.

27. The scanning head of claim 26, wherein: The plurality of sub-tubes are arranged in a ring shape, and the wind direction control switch is a circular baffle structure composed of an opening part and a shielding part; The wind direction control switch is turned, and when the opening part of the wind direction control switch connects the ventilation route between any of the sub-pipes and the main pipe, the shielding part shields the other sub-pipes to block the ventilation routes between the other sub-pipes and the main pipe.

28. The scanning head of claim 26, wherein: The plurality of sub-pipes are arranged in a straight line or in an arc shape, and the wind direction control switch is a baffle structure including a plurality of movable baffles, and the plurality of baffles correspond to the plurality of sub-pipes one by one and are configured to block the ventilation route between the sub-pipes and the main pipe; Move any of the baffles in the wind direction control switch to open a ventilation route between the corresponding sub-pipe and the main pipe.

29. The scanning head of claim 28, wherein: Slide grooves are arranged on both sides of each baffle in the wind direction control switch, and the baffle is slidably connected to the slide grooves; the baffle opens or blocks the ventilation route between the sub-pipe and the main pipe by sliding in the slide grooves.

30. The scanning head of claim 28, wherein: The blocking piece is a self-locking push-to-pop structure that automatically locks when pressed once and automatically pops up when pressed again.

31. The scanning head of claim 25, wherein: The shell body is provided with a pipe sleeve, and the pipe sleeve has a plurality of sub-pipes built therein.

32. The scanning head of claim 24, wherein: The air inlet of the main pipe is provided with a fan.

33. The scanning head of claim 24, wherein: The plurality of sub-tubes are all narrow and slit-shaped tubular structures.

34. The scanning head of claim 15, wherein: The air duct is fixed on the shell by adhesion.

35. The scanning head of claim 18, wherein: The first fixture is a fixture with spherical freedom.

36. The scanning head of claim 15, wherein: The air duct includes a hose and a hard tube, the hose is connected to one end of the hard tube and communicates with the hard tube, the hose is located on one side of the scanning host, and the hard tube is configured to connect the shell to guide the fluid to flow at the scanning port.

37. The scanning head of claim 36, wherein: The air duct also includes a bent tube extending into the shell, the bent tube is arranged at one end of the hard tube away from the hose, the bent tube has an air jet, and the inner diameter of the air jet gradually decreases along the jet direction.

38. The scanning head of claim 37, wherein: The air duct also includes a transition pipe, two ends of which are respectively connected to the hard pipe and the soft pipe, and the transition pipe is bendable and is located at the connection between the scanning host and the shell.

39. The scanning head of claim 37, wherein: A reflector is arranged in the shell, the bending tube is arranged on one side of the reflector, a side nozzle connected with the nozzle is opened on the outer periphery of the bending tube, and the side nozzle is arranged toward the reflector.

40. The scanning head of claim 39, wherein: The included angle between the spray direction of the side nozzle and the reflector is greater than or equal to 10° and less than or equal to 45°.

41. The scanning head of claim 39, wherein: The cross-sectional shape of the side nozzle is fan-shaped.

42. The scanning head of claim 36, wherein: The hose is detachably connected to an adapter away from the hard tube, and the adapter includes an adapter body, an air inlet pipe and an air outlet pipe. The air inlet pipe and the air outlet pipe are respectively arranged on opposite sides of the adapter body and are connected to each other. The air outlet pipe is detachably connected to the fluid injection module, and the air inlet pipe is connected to the dental chair.

43. A scanning head according to claim 42, wherein: The adapter also includes a sealing gasket, which is sleeved on the outer periphery of the air inlet pipe and connected to a side of the adapter body that is away from the air outlet pipe.

44. The scanning head of claim 42, wherein: A plurality of step structures are arranged on the outer periphery of the air outlet duct, and the plurality of step structures are arranged at intervals along the air outlet direction of the air outlet duct.

45. The scanning head of claim 36, wherein: The scanning head further comprises a first fixing member, wherein the first fixing member is arranged on the housing, and the hard tube is detachably arranged on the first fixing member.

46. ​​A scanning head according to claim 45, wherein: The first fixing member includes a first component for connecting to the housing, a first groove is formed on a side of the first component away from the scanning head, and the hard tube is clamped in the first groove.

47. A scanning head according to claim 46, wherein: The first fixing member also includes a second component, a second groove is opened on one side of the second component, one end of the second component is rotatably connected to the first component, and the rotatably connected second component can be opened or buckled on the first component. When the first component and the second component are buckled together, the hard pipe is clamped in the first groove and the second groove.

48. The scanning head of claim 45, wherein: The scanning head further includes at least one second fixing member, which is detachably connected to the hose and is configured to fix the hose on the scanning host.

49. The scanning head of claim 1, wherein: The shell is a structure made of printing material.

50. A scanning head, wherein: include: A housing, wherein a scanning port is formed at one end of the housing; A gingival retraction component is detachably mounted on the housing, and the gingival retraction component comprises a gingival retraction probe, and the gingival retraction probe is arranged near the scanning port of the scanning head.

51. A duct assembly, applied to a scanner, wherein: include: An air duct, comprising a hose and a hard tube, wherein the hose is connected to one end of the hard tube and communicates with the hard tube, the hose is used to connect to a scanning host, and the hard tube is used to connect to a housing to guide the fluid to flow at a scanning port of the housing; An adapter, one end of which is detachably connected to an end of the hose away from the hard tube and communicated with the hose, and the other end of the adapter is used for connecting to a dental chair.

52. A scanner, wherein: include: A scanning host and a scanning head, wherein the scanning head is the scanning head described in any one of claims 1-50.

53. An oral scanning system, wherein: include: The scanner of claim 52; A data processing device, the data processing device is connected to the scanner, and the data processing device analyzes and calculates the three-dimensional shape data of the patient's oral cavity by receiving the image recorded by the scanner; A dental chair is connected with the scanner.

54. The oral cavity scanning system of claim 53, wherein: The oral scanning system also includes: A dental three-purpose gun, connected to the dental chair and the fluid injection module respectively, and configured to control whether the dental chair supplies air to the fluid injection module; Alternatively, a foot switch is connected to the dental chair and is configured to control whether the dental chair supplies air to the fluid injection module.

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