Intermaxillary positioning navigation occlusal splint

Abstract

The present invention discloses an intermaxillary positioning navigation occlusal splint, belonging to the technical field of medical devices. The occlusal splint includes a U-shaped occlusal splint, which has an upper surface and a lower surface. The upper surface has upper dentition imprints matching the upper dentition, and the lower surface has lower dentition imprints matching the lower dentition. At least five imaging marker points are distributed on the occlusal splint, and imaging materials are provided at the imaging marker points. The periphery of the occlusal splint has labial and buccal sides, and imaging marker points are arranged on the labial and buccal sides, and the imaging marker points are spaced apart along the extending direction of the labial and buccal sides. The present invention can achieve high-precision jaw registration, and can achieve non-destructive imaging and jaw positioning of patients.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an inter-maxillary positioning navigation occlusal plate. Background Art

[0002] In maxillomandibular surgery, the use of navigation and registration devices is essential to ensure surgical accuracy.

[0003] The commonly used navigation registration methods in clinical practice mainly include two technical solutions: face registration and point registration. The face registration method usually completes the registration of the patient's facial structure by fixing the reference frame at the front skull top and using an infrared scanner to scan the soft tissue landmarks of the forehead, nasal root and bilateral infraorbital area. This method is applicable when the patient's face is not obviously swollen, but if the patient's facial soft tissue is deformed due to obesity or swelling, the accuracy of the registration will be greatly affected, resulting in increased navigation positioning errors during surgery.

[0004] The point registration method is to fix the reference frame to the front skull, and use the probe to select anatomical landmarks such as the inner canthus, outer canthus, nasal root, and maxillary cusp for registration. This method is mostly used for navigation registration of the skull or maxilla. However, point registration has certain limitations for the precise registration of the mandible, because the position of the mandible relative to other jaws is unstable and its position cannot be accurately determined by simple point registration. This leads to inaccurate surgical navigation of the mandible, affecting the postoperative effect. Another common registration method is self-tapping screw + bite plate registration. In this method, the maxillary and mandibular bones are fixed as a whole by a bite plate, and self-tapping screws are implanted on the labial and buccal sides of the alveolar processes of the maxillary and mandibular bones. A preoperative CT scan is then performed, and the landmarks are registered using the intraoperative reference frame and probe. The landmarks of this method are closer to the maxillary and mandibular bones, so they can more accurately reflect the position of the maxillary and mandibular bones than face registration and point registration. However, the use of self-tapping screws has several disadvantages: first, self-tapping screws will produce metal artifacts in CT images, affecting the clarity of the image, which is not conducive to the accurate selection of landmark points; second, the implantation of self-tapping screws is an invasive operation, which increases the patient's pain and the risk of postoperative infection; finally, the cost of self-tapping screws is high and it is difficult to be widely accepted.

[0005] The U.S. Patent No. US17679726 discloses an optical corrector seating device and method. The device has a bite plate with a light-emitting element for contacting the corrector. The corrector placement device applies light radiation during a predetermined number of sessions throughout a predetermined treatment period by placing an oral piece on the corrector, and the fit between the corrector and the teeth is adjusted based on the light-emitting element. This invention adapts to the teeth through the light-emitting element and does not cause discomfort to the jaw muscles. The bite plates of the prior art are difficult to accurately display the position information of the jawbone during surgery while maintaining the fit with the teeth, which brings inconvenience to jaw reconstruction surgery. Summary of the Invention

[0006] The purpose of the present invention is to provide an intermaxillary positioning navigation bite plate with high navigation accuracy and stable surgical safety during jaw surgery.

[0007] The technical solution adopted by the present invention to achieve the above purpose is as follows:

[0008] An intermaxillary positioning navigation bite plate, comprising: a U-shaped bite plate with an upper surface and a lower surface. The upper surface has an upper dentition imprint matching the upper dentition, and the lower surface has a lower dentition imprint matching the lower dentition. At least five imaging marker points are distributed on the bite plate, and imaging materials are provided at the imaging marker points. Before surgery, the data of the patient is scanned to generate a personalized bite plate. The upper dentition imprint and the lower dentition imprint of the bite plate are respectively matched with the upper dentition and the lower dentition of the patient to ensure the complete match between the dentition imprint and the patient's dentofacial surface, so that the upper dentition and the lower dentition of the patient are fixed in position through the bite plate, thereby making the bite plate highly coincide with the anatomical shape of the patient's jawbone, ensuring stability and accuracy during surgery, and avoiding the possibility of errors caused by the loosening and misalignment of the traditional universal bite plate with the patient's teeth. The imaging materials at the imaging marker points can be clearly displayed in the CT image, providing the registration and positioning of the bite plate in the patient's oral cavity during surgery. Compared with the traditional method of using self-tapping screws for registration, on the one hand, it reduces the additional damage of the bite plate to the patient's oral cavity, and on the other hand, it avoids the influence of the metal artifacts of the self-tapping screws on the CT image during the CT scan, improving the registration accuracy in jaw repair surgery.

[0009] Preferably, the occlusal splint has buccal and labial sides on its periphery, and imaging marker points are arranged on the buccal and labial sides. The imaging marker points are spaced apart along the extension direction of the buccal and labial sides. The imaging marker points distributed on the buccal and labial sides can form a display of the outer curved surface contour of the occlusal splint. According to the above-mentioned imaging marker points, the position of the curved surface contour of the buccal and labial sides during the operation can be determined. That is, the CT image display of the outer curved surface contour of the occlusal splint can be realized through a small number of imaging marker points, which can better and more accurately reflect the positions of various parts of the occlusal splint and improve the registration accuracy during the operation. Moreover, during the operation, the path formed by the imaging marker points on the buccal and labial sides can, while achieving accurate point registration, form an auxiliary registration using the paths formed by each marker point, making the registration during the operation more efficient, reducing the frequency of repeated adjustment of the marker points during the operation. On the one hand, the operation time is shortened and the efficiency of jaw repair surgery is improved. On the other hand, the discomfort caused to the patient's oral cavity by adjusting the marker points is reduced.

[0010] Preferably, the imaging marker points include grooves opened on the occlusal splint, and imaging materials can be filled in the grooves. By implanting the imaging materials in the grooves, the stable arrangement of the imaging materials in the occlusal splint is realized. In the CT image, a stable registration basis is achieved through the imaging materials, and at the same time, it is also convenient to take out and replace the imaging materials, so that different imaging materials can be replaced according to different surgical requirements, improving the application range of the occlusal splint. Compared with the traditional self-tapping screw imaging, the cost of the imaging materials is lower, which can reduce the economic burden on patients. At the same time, the imaging materials can contact the internal muscles of the patient's oral cavity non-invasively, reducing the possibility of the occlusal splint damaging the patient's oral cavity due to registration during the operation, reducing the incidence of postoperative complications caused by trauma, and further reducing the additional medical expenses after the operation.

[0011] Preferably, electronic components are implanted in the occlusal splint. The electronic components are wirelessly connected to a navigation system, and the navigation system is used to provide the dynamic position of the jaw bone. The electronic components include an integrated micro-sensor and a dynamic navigation chip. The integrated micro-sensor and the dynamic navigation chip can be docked with an external navigation system through wireless technology during the operation to monitor and calibrate the position of the jaw bone in real time, avoiding the limitations of static marker points, that is, converting the traditional static imaging markers into a dynamic real-time feedback system, which can greatly improve the accuracy and safety of the operation. Especially in complex mandibular reduction surgeries, it ensures the real-time performance and reliability of surgical navigation, facilitating the surgeon to adjust and repair the position of the mandible according to different intraoperative situations.

[0012] Preferably, a first groove is provided at the opening edge of the upper surface of the upper dental arch imprint. The first groove has a surface that is away from the upper dental arch imprint and diffuses upward and outward. A second groove is provided on the surface, and the second groove communicates with the inner wall of the upper dental arch imprint. The second groove has a groove bottom that is inclined downward and inward of the upper dental arch imprint. On the premise of ensuring that the patient's upper dental arch can accurately match the upper dental arch imprint, the first groove enlarges the opening of the upper dental arch imprint on the upper surface, which is beneficial to the patient's dental arch entering the dental arch imprint of the occlusal plate to form a cooperation guide, improving the installation speed and reducing the possibility of extrusion damage to the patient's teeth and periodontal muscles at the edge of the dental impression during the installation of the occlusal plate; since the occlusal plate is customized for the patient before surgery, from the completion of data collection to the operation period, the muscles around the patient's teeth, such as the gums, may become swollen, resulting in the upper surface of the customized occlusal plate contacting and squeezing the swollen muscles when the occlusal plate is positioned and installed in the patient's mouth, resulting in a low degree of adaptation between the occlusal plate and the teeth and causing damage to the swollen muscles, leading to postoperative oral complications. The first groove can adapt to the swollen periodontal muscles, improving the matching accuracy between the occlusal plate and the dental arch, solving the problem of poor adaptability of the occlusal plate caused by the patient's oral muscle problems, and improving the surgical registration accuracy; the second groove is provided on the surface and has an inclined groove bottom. Through the surface and the second groove, the muscle secretions around the attachments on the teeth can be collected, and the collected secretions are concentrated into the upper dental arch imprint through the surface and the groove bottom, avoiding the accumulation of secretions in the patient's oral cavity and causing discomfort in the patient's pharynx.

[0013] Preferably, the occlusal plate is provided with through holes that communicate the upper dental arch imprint and the lower dental arch imprint. The through holes are located in the middle of each imprint of the upper dental arch imprint and the lower dental arch imprint. The through holes ensure the communication between the upper dental arch imprint and the lower dental arch imprint, that is, oral secretions can reach the upper dental arch imprint and the lower dental arch imprint through the through holes, which helps to form a wrapping layer around the teeth, reducing the excessive wear of the occlusal plate and the teeth when the occlusal plate is removed due to the close contact between the occlusal plate and the teeth, and reducing the possibility of causing damage to the tooth surface.

[0014] Preferably, the occlusal splint is provided with a slot at the outermost edge of the middle part of the labial and buccal sides. A plug board is detachably connected in the slot, and a part of the plug board can enter the patient's oral cavity with the occlusal splint. The plug board can be inserted into the slot. The operator can hold the plug board and send the occlusal splint into the patient's oral cavity for occlusal installation. Compared with directly inserting the occlusal splint into the patient's oral cavity by hand, on the one hand, it reduces the possibility of hand bacteria contaminating the oral environment of the patient. On the other hand, the part of the plug board is located outside the patient's oral cavity, and the occlusal splint can be adjusted before installation by adjusting the plug board, avoiding damage to the operator's fingers when the patient bites, improving the efficiency and safety of the operator installing the occlusal splint in the patient's oral cavity, and providing high operability; when the occlusal splint needs to be removed after the operation, adjusting the plug board can facilitate the loosening of the occlusal splint on the dentition, facilitate the removal of the occlusal splint, reduce the possibility of slipping due to the attachment of secretions when removing the occlusal splint by hand, accelerate the removal speed of the occlusal splint, and reduce the time of the occlusal splint in the patient's oral cavity to reduce the discomfort of the patient's oral cavity.

[0015] Preferably, the plug board includes a board body matching the slot and elastic strips. The elastic strips are connected to both sides of the board body. The elastic strips can approach and move away from the board body by extrusion, and the elastic strips are pressed against the inner wall of the slot. When the elastic strips extruded on both sides of the board body approach the board body, at this time the plug board can enter the slot together with the elastic strips. Release the elastic strips, and the elastic strips recover their deformation and move away from the board body in the slot, realizing the close contact of the elastic strips in the slot. The setting of the elastic strips, on the one hand, facilitates the tight connection of the plug board in the slot, avoids the plug board easily detaching from the slot, and improves the efficiency of adjusting and positioning the occlusal splint in the oral cavity. On the other hand, the plug board can be quickly detached from the slot by squeezing the elastic strips, avoiding friction between the plug board and the slot when the plug board detaches, causing pulling of the occlusal splint and damaging the patient's teeth under pressure.

[0016] Preferably, the U-shaped occlusal splint has auxiliary parts inside the opening. The auxiliary parts include symmetrically arranged retaining pieces. The retaining pieces extend along the inner wall of the opening of the occlusal splint, and the retaining pieces can contact the side of the patient's tongue. The retaining pieces are connected to a base body, and the base body can contact the bottom of the patient's tongue.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The customized occlusal splint adapts to the individual characteristics of the patient, which can effectively reduce the registration error caused by poor adaptation; compared with the traditional self-tapping screw, the occlusal splint navigation positioning of the present invention is realized through the imaging material while avoiding additional trauma to the patient's oral cavity; compared with the traditional self-tapping screw, the imaging material reduces the medical expenses of the patient and reduces the economic burden of the patient; setting the imaging material in the groove to replace the traditional self-tapping screw reduces the influence of metal artifacts on the CT image and improves the registration accuracy; the imaging marks on the labial and buccal sides form contour marks, which can assist point registration to reduce the adjustment frequency of the marking points, shorten the operation time, and at the same time reduce the discomfort of the patient; the imaging marking points can achieve dynamic feedback through electronic components in cooperation with the navigation system, which is conducive to maintaining a high level of navigation accuracy in complex surgeries, reducing errors and improving the postoperative effect; the first groove body and the second groove body collect periodontal secretions, reducing the possibility of discomfort in the patient's pharynx; the first groove body guides the installation of the occlusal splint, reducing the possibility of contact damage to the periodontal muscles by the occlusal splint; the first groove body can ensure the matching degree between the occlusal splint and the teeth when the patient's periodontal muscles are diseased and swollen, reducing the loosening of the occlusal splint caused by low matching degree and stabilizing the registration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an intermaxillary positioning navigation occlusal splint;

[0019] Figure 2 It is a top view schematic diagram of an intermaxillary positioning navigation occlusal splint;

[0020] Figure 3 It is a bottom view schematic diagram of an intermaxillary positioning navigation occlusal splint;

[0021] Figure 4 It is a schematic diagram of the positions of the slot and the developing groove;

[0022] Figure 5 It is a schematic diagram of the plug-in plate structure;

[0023] Figure 6 It is a schematic diagram of the auxiliary part structure;

[0024] Figure 7 It is a schematic diagram of the inclined plane of the base body.

[0025] Reference numerals in the drawings: occlusal splint 1; upper surface 11; upper dentition imprint 110; lower surface 12; lower dentition imprint 120; labial and buccal sides 13; imaging marking points 2; groove 21; imaging material 22; first groove body 3; second groove body 4; through hole 5; slot 6; plug-in plate 7; plate body 71; elastic strip 72; auxiliary part 8; retaining piece 81; base body 82; inclined plane 83; protrusion 84. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings:

[0027] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] Refer to the attached Figure 1 - attached Figure 4 A maxillomandibular positioning navigation occlusal splint, comprising: a U-shaped occlusal splint 1, the occlusal splint 1 having an upper surface 11 and a lower surface 12, the upper surface 11 having an upper dentition imprint 110 matching the upper dentition, the lower surface 12 having a lower dentition imprint 120 matching the lower dentition, and at least five imaging marker points 2 being distributed on the occlusal splint 1, and an imaging material 22 being provided at the imaging marker points 2.

[0030] Before the operation, the data of the patient is scanned to generate a personalized occlusal splint 1, and the personalized occlusal splint 1 is realized by 3D printing technology. The upper dentition imprint 110 and the lower dentition imprint 120 of the occlusal splint 1 are respectively matched with the upper and lower dentitions of the patient to ensure the complete matching of the dentition imprints with the patient's dentomaxillofacial surface, so that the upper and lower dentitions of the patient are fixed in position through the occlusal splint 1, thereby making the occlusal splint 1 highly conform to the anatomical shape of the patient's jaws, ensuring the stability and accuracy during the operation, and avoiding the possibility of errors caused by the loosening and misalignment of the traditional universal occlusal splint 1 with the patient's teeth; the imaging material 22 at the imaging marker points 2 can be clearly shown in the CT image, providing the registration and positioning of the occlusal splint 1 in the patient's oral cavity during the operation. Compared with the traditional registration using self-tapping screws, on the one hand, it reduces the additional damage of the occlusal splint 1 to the patient's oral cavity, and on the other hand, it avoids the influence of the metal artifacts of the self-tapping screws on the CT image during the CT scan, improving the registration accuracy in the jaw repair operation.

[0031] The imaging material 22 adopts a material that can be clearly imaged in the CT scan, and the imaging material 22 includes but is not limited to: gutta-percha points, dental light-curing resin, amalgam, steel wire, embedded iodine balls, orthodontic brackets or root canal pastes.

[0032] The occlusal splint 1 has a labiobuccal side surface 13 on its periphery, and imaging marker points 2 are provided on the labiobuccal side surface 13. The imaging marker points 2 are distributed at intervals along the extending direction of the labiobuccal side surface 13. The imaging marker points 2 distributed on the labiobuccal side surface 13 can form a display of the outer curved surface contour of the occlusal splint 1. According to the above-mentioned imaging marker points 2, the position of the curved surface contour of the labiobuccal side surface 13 during the operation can be constituted, that is, the CT image display of the outer curved surface contour of the occlusal splint 1 is realized through a small number of imaging marker points 2, which can better and more accurately reflect the positions of various parts of the occlusal splint 1 and improve the registration accuracy during the operation. Moreover, during the operation, the path formed by the imaging marker points 2 on the labiobuccal side surface 13 can, while achieving accurate point registration, form auxiliary registration by using the paths formed by each marker point, making the registration during the operation more efficient, reducing the frequency of repeated adjustment of the marker points during the operation. On the one hand, it shortens the operation time and improves the efficiency of jaw repair surgery. On the other hand, it reduces the discomfort brought to the patient's oral cavity by adjusting the marker points.

[0033] The imaging marker points 2 can also be arranged at: the position on the upper surface 11 close to the labiobuccal side surface 13; the position on the lower surface 12 close to the labiobuccal side surface 13.

[0034] The imaging marker points 2 include grooves 21 opened on the occlusal splint 1, and imaging materials 22 can be filled in the grooves 21.

[0035] By implanting the imaging material 22 into the grooves 21, the stable arrangement of the imaging material 22 in the occlusal splint 1 is realized. In the CT image, a stable registration basis is realized through the imaging material 22, and at the same time, it is also convenient to take out and replace the imaging material 22, so as to replace different imaging materials 22 according to different surgical needs, improving the application range of the occlusal splint 1. Compared with the traditional self-tapping screw imaging, the cost of the imaging material 22 is lower, which can reduce the economic burden of the patient. At the same time, the imaging material 22 can contact the internal muscles of the patient's oral cavity non-invasively, reducing the possibility of the occlusal splint 1 damaging the patient's oral cavity due to registration during the operation, reducing the incidence of postoperative complications caused by trauma, and further reducing the additional medical expenses after the operation.

[0036] Electronic components are implanted in the occlusal splint 1, and the electronic components are wirelessly connected to a navigation system, and the navigation system is used to provide the dynamic position of the jaw bone.

[0037] The electronic components include an integrated micro-sensor and a dynamic navigation chip. The integrated micro-sensor and the dynamic navigation chip can be docked with an external navigation system through wireless technology during the operation to monitor and calibrate the position of the jawbone in real time, avoiding the limitations of static marking points, that is, converting the traditional static imaging marks into a dynamic real-time feedback system, which can greatly improve the accuracy and safety of the operation. Especially in complex mandibular reduction surgeries, it ensures the real-time performance and reliability of surgical navigation, facilitating the surgeon to adjust the position of the mandible and perform repairs according to different intraoperative situations.

[0038] The upper dentition imprint 110 is provided with a first groove 3 at the opening edge of the upper surface 11. The first groove 3 has a surface that is away from the upper dentition imprint 110 and diffuses upward and outward. A second groove 4 is provided on the surface. The second groove 4 communicates with the inner wall of the upper dentition imprint 110, and the second groove 4 has a groove bottom that is inclined downward and inward of the upper dentition imprint 110.

[0039] On the premise of ensuring that the patient's upper dentition can be accurately matched with the upper dentition imprint 110, the first groove 3 expands the opening of the upper dentition imprint 110 on the upper surface 11, which is beneficial for the patient's dentition to enter the dentition imprint of the occlusal plate 1 to form a cooperative guide, improving the installation speed and reducing the possibility of extrusion damage to the patient's teeth and periodontal muscles at the edge of the tooth imprint during the installation of the occlusal plate 1. Since the occlusal plate 1 is customized for the patient before the operation, from the completion of data collection to the operation period, the muscles around the patient's teeth, such as the gums, may swell, resulting in the upper surface 11 of the already customized occlusal plate 1 coming into contact with and squeezing the swollen muscles when the occlusal plate 1 is positioned and installed in the patient's mouth, leading to a poor fit between the occlusal plate 1 and the teeth and causing damage to the swollen muscles, resulting in postoperative oral complications. The first groove 3 can adapt to the swollen periodontal muscles, improving the matching accuracy between the occlusal plate 1 and the dentition, solving the problem of poor adaptability of the occlusal plate 1 caused by the patient's oral muscle problems, and improving the surgical registration accuracy. The second groove 4 is provided on the surface and has an inclined groove bottom. Through the surface and the second groove 4, the muscle secretions around the attachments on the teeth can be collected, and the collected secretions can be concentrated into the upper dentition imprint 110 through the surface and the groove bottom, avoiding the accumulation of secretions in the patient's oral cavity and causing discomfort in the patient's pharynx.

[0040] The occlusal plate 1 is provided with through holes that communicate the upper dentition imprint 110 with the lower dentition imprint 120. The through holes are located in the middle of each imprint of the upper dentition imprint 110 and the lower dentition imprint 120.

[0041] The through hole ensures the connection between the upper dental arch imprint 110 and the lower dental arch imprint 120, that is, oral secretions can reach the upper dental arch imprint 110 and the lower dental arch imprint 120 through the through hole, which helps to form a wrapping layer around the teeth, reduces excessive wear on the teeth when the occlusal plate 1 is removed due to the tight contact between the occlusal plate 1 and the teeth, and reduces the possibility of causing damage to the tooth surface.

[0042] See the appendix Figure 5 , the occlusal plate 1 is provided with a slot 6 at the outermost edge of the middle part of the labial and buccal side 13. A plug board 7 is detachably connected in the slot 6, and a part of the plug board 7 can enter the patient's oral cavity with the occlusal plate 1.

[0043] The plug board 7 can be inserted into the slot 6. The operator can hold the plug board 7 and send the occlusal plate 1 into the patient's oral cavity for occlusal installation. Compared with directly inserting the occlusal plate 1 into the patient's oral cavity by hand, on the one hand, it reduces the possibility of hand bacteria contaminating the oral environment of the patient. On the other hand, a part of the plug board 7 is located outside the patient's oral cavity, and the occlusal plate 1 can be adjusted before installation by adjusting the plug board 7, avoiding damage to the operator's fingers when the patient bites, improving the efficiency and safety of the operator installing the occlusal plate 1 in the patient's oral cavity, and providing high operability; when the occlusal plate 1 needs to be removed after the operation, the occlusal plate 1 can be loosened on the dental arch by adjusting the plug board 7, facilitating the removal of the occlusal plate 1, reducing the possibility of slipping due to the attachment of secretions when removing the occlusal plate 1 by hand, accelerating the removal speed of the occlusal plate 1, and reducing the time of the occlusal plate 1 in the patient's oral cavity to reduce the discomfort of the patient's oral cavity.

[0044] The plug board 7 includes a plate body 71 that cooperates with the slot 6 and elastic strips 72. The elastic strips 72 are connected to both sides of the plate body 71. The elastic strips 72 can approach and move away from the plate body 71 by extrusion, and the elastic strips 72 are pressed against the inner wall of the slot 6. When the elastic strips 72 on both sides of the plate body 71 approach the plate body 71 by extrusion, at this time, the plug board 7 can enter the slot 6 together with the elastic strips 72. Release the elastic strips 72, and the elastic strips 72 recover their deformation and move away from the plate body 71 in the slot 6, realizing the tight contact of the elastic strips 72 in the slot 6. The setting of the elastic strips 72 facilitates the tight connection of the plug board 7 in the slot 6 on the one hand, avoiding the easy detachment of the plug board 7 from the slot 6 and improving the efficiency of adjusting and positioning the occlusal plate 1 in the oral cavity. On the other hand, the plug board 7 can be quickly detached from the slot 6 by squeezing the elastic strips 72, avoiding the pulling of the occlusal plate 1 caused by friction between the plug board 7 and the slot 6 when the plug board 7 is detached, and causing pressure damage to the patient's teeth.

[0045] See the appendix Figure 6 , the U-shaped occlusal plate 1 has an auxiliary part 8 inside the opening. The auxiliary part 8 includes symmetrically arranged retaining pieces 81. The retaining pieces 81 extend along the inner wall of the opening of the occlusal plate 1. The retaining pieces 81 can contact the side of the patient's tongue, and the retaining pieces 81 are connected to a base body 82, and the base body 82 can contact the bottom of the patient's tongue.

[0046] Example 2:

[0047] Refer to the attached Figure 7 , on the basis of Embodiment 1 of the present invention, the base body 82 is fixed to the side of the bottom of the baffle 81 away from the occlusal plate 1. The base body 82 has an inclined surface 83 extending downward below the U-shaped opening of the occlusal plate 1. The inclined surface 83 has raised portions 84 in a corrugated shape, and a collection groove is formed below the inclined surface 83 between adjacent raised portions 84.

[0048] The auxiliary member 8 further includes a connecting plate 85. The middle of the inner side surface of the occlusal plate 1 has a jack, and the connecting plate 85 has a plug 86 that cooperates with the jack. The connecting plate 85 is assembled with the occlusal plate 1 by inserting the plug 86 into the jack, and the baffle 81 is fixed to both sides of the connecting plate 85 and close to the inner side wall of the occlusal plate 1.

[0049] When the occlusal plate 1 extends into the patient's oral cavity, the inclined surface 83 of the base body 82 can contact the patient's tongue. Along with the continuous extension of the occlusal plate 1, the patient's entire tongue is lifted by the inclined surface 83 of the base body 82. At the same time, the side of the patient's tongue is laterally limited by the baffle 81, realizing the stability of the patient's tongue position during the operation. On the one hand, it reduces the accidental contact of the patient's tongue with the occlusal plate 1 or the imaging material 22 during the operation, affecting the intraoperative registration image and avoiding the loosening of the occlusal plate 1 resulting in a decrease in registration accuracy. On the other hand, it avoids the discomfort of the patient's tongue after the operation caused by the unnatural lifting and peristalsis of the tongue, improving the comfort of the patient after the operation.

[0050] During the operation, saliva is likely to continuously be produced in the patient's oral cavity. The base body 82 lifts the patient's tongue through the inclined surface 83, so that the root of the patient's tongue is lifted to a certain height. The raised portions 84 on the inclined surface 83 slow down the flow of saliva and, at the same time, collect the saliva formed by the collection grooves formed between the raised portions 84, avoiding excessive saliva secretion in the patient's oral cavity and quickly reaching the pharynx during the operation, resulting in discomfort or even suffocation in the patient's pharynx, ensuring the smoothness of the patient's breathing during the jaw surgery and improving the breathing safety of the patient during the operation.

[0051] The corrugated raised portions 84 can scrape off the attachments at the bottom of the patient's tongue, avoiding the attachments affecting the imaging image and interfering with the registration process, and improving the stability of the registration process.

[0052] The arrangement of the connecting plate 85 and the plug 86 realizes the combined connection of the occlusal plate 1 and the auxiliary member 8, reducing the manufacturing difficulty.

[0053] There is a spacing distance between the baffle 81 and the inner side wall of the opening of the occlusal plate 1. The baffle 81 is an elastic member, and the baffle 81 can swing at the connection with the connecting plate 85.

[0054] Since there is a gap between the baffle 81 and the inner side of the opening of the occlusal plate 1, after the base body 82 lifts the tongue, the baffle 81 can adapt to the current unfolded state of the patient's tongue to form a lateral limit, avoiding discomfort caused by the lateral extrusion force on the patient's tongue;

[0055] On the other hand, the auxiliary member 8 does not need to be customized for each patient. The baffle 81 can deform and swing within the spacer space to adapt to the tongues of different patients, improving the applicability of the device. By assembling the personalized occlusal plate and the auxiliary member that can adapt to different patients, the combined device can well adapt to the patient, providing comfort and safety during the operation.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An intermaxillary positioning navigation occlusal splint, comprising: U-shaped occlusal splint (1), the occlusal splint (1) having an upper surface (11) and a lower surface (12), characterized in that: the upper surface (11) has an upper dentition imprint (110) matching the upper dentition, the lower surface (12) has a lower dentition imprint (120) matching the lower dentition, at least five developing marker points (2) are distributed on the occlusal splint (1), a developing material (22) is provided at the developing marker points (2), a first groove (3) is provided at the opening edge of the upper surface (11) where the upper dentition imprint (110) is located, the first groove (3) has a surface that is away from the upper dentition imprint (110) and diffuses outward and upward, a second groove (4) is provided on the surface, the second groove (4) communicates with the inner wall of the upper dentition imprint (110), and the second groove (4) has a groove bottom that is inclined downward and inward of the upper dentition imprint (110).

2. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: The periphery of the occlusal splint (1) has a labial-buccal side surface (13), and the developing marker points (2) are provided on the labial-buccal side surface (13), and the developing marker points (2) are distributed at intervals along the extending direction of the labial-buccal side surface (13).

3. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: The developing marker points (2) include grooves (21) opened on the occlusal splint (1), and the grooves (21) can be filled with the developing material (22).

4. The intermaxillary positioning navigation occlusal splint according to claim 3, characterized in that: A micro sensor can be placed in the grooves (21), and one of the developing material (22) and the micro sensor is filled in the grooves (21).

5. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: An electronic component is implanted in the occlusal splint (1), and the electronic component is wirelessly connected to a navigation system, and the navigation system is used to provide the dynamic position of the jaw bone.

6. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: The occlusal splint (1) is provided with through holes (5), the through holes (5) communicate the upper dentition imprint (110) with the lower dentition imprint (120), and the through holes (5) are located in the middle of each imprint of the upper dentition imprint (110) and the lower dentition imprint (120).

7. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: The occlusal splint (1) is provided with a slot (6) at the outermost edge in the middle of the labial-buccal side surface (13), and a plug board (7) is detachably connected in the slot (6), and a part of the plug board (7) can enter the patient's oral cavity with the occlusal splint (1).

8. The intermaxillary positioning navigation occlusal splint according to claim 7, characterized in that: The plug board (7) includes a board body (71) that cooperates with the slot (6) and elastic strips (72), the elastic strips (72) are connected to both sides of the board body (71), the elastic strips (72) can approach and move away from the board body (71) by extrusion, and the elastic strips (72) are pressed against the inner wall of the slot (6).

9. The intermaxillary positioning navigation occlusal splint according to claim 1, characterized in that: The U-shaped occlusal splint (1) has an auxiliary member (8) inside the opening, the auxiliary member (8) includes symmetrically arranged baffle plates (81), the baffle plates (81) extend along the inner side wall of the opening of the occlusal splint (1), the baffle plates (81) can contact the side surface of the patient's tongue, and the baffle plates (81) are connected to a base body (82), and the base body (82) can contact the bottom of the patient's tongue.

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