109 results about "Maxillary tooth" patented technology

The invention discloses a CBCT tooth segmentation method and system based on an anatomical perception cascade network, and the method comprises the steps: a first stage, carrying out the simplified dichotomy segmentation based on an original CBCT image and a coarse segmentation network taking 3D U-Net as a trunk, outputting maxillary and mandibular tooth probability graphs, and taking the maxillary and mandibular tooth probability graphs as prior information to guide the generation of an SDM; in the second stage, the original CBCT image and the calibrated maxillary tooth probability graph and the calibrated mandibular tooth probability graph are spliced together, a formed multi-channel input tensor is input into a fine segmentation network, the fine segmentation network takes Residual U-Net as a trunk, and an improved AGBR module and an improved SDMAA module are integrated in an encoder-decoder architecture of the fine segmentation network; and the decoder fuses all refined and re-calibrated feature maps, and upsamples and reconstructs 42 types of instance segmentation results with correct topology and clear boundaries. According to the method, the problem that in the prior art, when the inherent and local boundary fuzzy defect in CBCT is overcome, an effective pertinence mechanism is lacked is solved, and precise and robust 42-class instance segmentation can be achieved.

The invention relates to an occlusion guide plate designing and manufacturing method based on dentition mechanical analysis, which comprises the following steps: S1, acquiring oral cavity image data of a patient, and constructing a three-dimensional digital model comprising a dental crown, a tooth root and an alveolar bone structure; s2, calculating an overall mechanical reference point of a tooth root structure of an anterior maxillary tooth area; s3, acquiring an incisal edge midpoint of each incisal tooth and a cusp point of each canine tooth in the maxillary anterior tooth area, solving a geometric center, and connecting the geometric center with an overall mechanical reference point to form a dentition direction vector; s4, calculating the displacement relationship between the target dentition arrangement and the initial dentition arrangement in the lip-tongue direction; s5, calculating an included angle between the occlusal force direction of the maxillary anterior tooth area and the dentition direction vector; s6, determining key morphological parameters of the occlusion guide plate according to the calculation result of the included angle in S5; and S7, manufacturing the occlusion guide plate. Compared with the prior art, the method has the advantages of precise mechanical adaptation, quantitative treatment prediction, personalized design and the like.

The utility model discloses a dental system which comprises two correcting devices corresponding to the Nth correcting step and the (N + M) th correcting step, N and M are positive integers, each correcting device comprises a jaw plate structure connected with the upper jaw and the lower jaw, each jaw plate structure comprises a first part arranged corresponding to the upper jaw teeth and a second part arranged corresponding to the lower jaw teeth, and when the jaw plate structures are connected with the upper jaw and the lower jaw, the first part is connected with the first part. The first part and the second part abut against each other to form an abutting face, the two jaw plate structures corresponding to the two correctors have different parameters, and the different parameters are configured as follows: when the jaw plate structures are connected with the upper jaw and the lower jaw, the different parameters generate different acting forces and / or different moments. Different parameters can enable the two correctors to generate different acting forces and / or different moments, and the correction requirements of different correction steps are met through the different acting forces and / or the different moments.

The invention relates to the field of orthodontics, in particular to a device for controlling palatal root movement of anterior teeth of an upper jaw and a manufacturing method. According to the device, the traction arm and the traction ring which extend to the palatal side of the anterior maxillary teeth are additionally arranged on the basis of the transverse palatal bar and are matched with the traction buckle of the anterior maxillary teeth to guide orthodontic force to act below a tooth impedance center, so that root control movement which is difficult to achieve by a traditional orthodontic method is realized, bending torque on an arch wire or placing other root control devices is not needed, and the whole device is simpler and more attractive; in addition, the device part is manufactured by adopting a 3D printing technology, firstly, tooth and intraoral soft tissue data of a patient are obtained by scanning the interior of an oral cavity, then the oral scanning data are matched with CBCT, a specific device is designed by using software, finally, a finished product is directly printed in a 3D manner, the transverse palatal bar and the traction buckle are completely matched with the tooth surface by adopting the 3D printing technology, and the comfort level is high.

The utility model provides an invisible appliance which comprises a shell-shaped body and a tongue muscle training piece, and the shell-shaped body is provided with a cavity for accommodating a plurality of maxillary teeth; the tongue muscle training piece is connected to the lingual gingival margin of the shell-shaped body or adjacent to the gingival margin, and is provided with a sensing cavity and a sensing opening for exposing the sensing cavity; wherein the sensing port is positioned on the tongue side of the tongue muscle training piece; the tongue muscle training piece is provided with a sensing cavity and a sensing opening exposing the sensing cavity, the sensing opening is located in the side, facing the tongue body, of the tongue muscle training piece, the tongue of a user completes tongue muscle training by touching the sensing opening and partially stretching into the sensing cavity, the experience feeling and interestingness are good, the training enthusiasm of the user can be stimulated, and the user experience is improved. And the tongue muscle training effect is improved.

The present invention relates to a guided bone regeneration device that is intended for the reconstruction of a buccal bone defect and is composed of an optionally micro-perforated smooth wall which is made of titanium and has a shape that covers said buccal bone defect.The present invention also relates to a process for manufacturing a device of the invention, comprising a step of constructing the device of the invention according to a three-dimensional representation obtained by means of a technique of maxillary-dental imaging of the bone defect.

The invention belongs to the technical field of medical instruments, and particularly relates to a multidirectional distraction osteogenesis correction system, in the multidirectional distraction osteogenesis correction system, the distance between a first fixing sleeve and a second fixing sleeve in supporting assemblies can be adjusted through a second traction assembly, and the distance between the two sets of supporting assemblies can be adjusted through a first traction assembly; the bilateral tooth-bone metastasis plate can be adjusted in the two-dimensional moving direction and the moving amount, the bilateral tooth-bone metastasis plate is allowed to move asymmetrically, transverse and sagittal differential distraction osteogenesis is achieved, and the bilateral tooth-bone metastasis plate is particularly suitable for cleft lip and palate patients with maxillary sagittal and transverse development insufficiency. According to the multidirectional distraction osteogenesis correction system, bilateral asymmetric distraction osteogenesis can be achieved, unilateral / bilateral alveolar process fractures of the front section of the maxillary dental arch are narrowed, the success rate of an alveolar process fracture bone grafting operation is increased, the alveolar bone mass of the middle section of the maxillary dental arch is increased, dentition congestion is relieved, space is provided for repair treatment, and the difficulty of subsequent treatment such as orthognathic surgery is reduced.

Embodiments of the present application relate to the field of digital processing, and disclose a display method and device of a hard palate appliance, an electronic device and a storage medium. The display method of the hard palate appliance in the present application comprises: obtaining information of a digital dental model, the information of the digital dental model at least including a maxillary tooth grid, a hard palate grid and a bite direction in tooth data of a case; calculating control points of teeth with preset numbers in the maxillary tooth grid; obtaining a grid model of a lower surface according to the control points and the hard palate grid; obtaining a grid model of an upper surface according to the grid model of the lower surface and the bite direction; generating a display model of the hard palate appliance according to the grid model of the lower surface and the grid model of the upper surface; and displaying the display model of the hard palate appliance. In the embodiments of the present application, the morphological characteristics of the hard palate appliance can be displayed.

This invention discloses a personalized Gothic arch component for dental implant restoration and a method for determining digital jaw position relationships, belonging to the field of medical device technology. The component includes a mandibular tracing needle fixation bracket, a tracing needle, a maxillary Gothic arch tracing plate, and fixing screws. The mandibular tracing needle fixation bracket comprises a Y-shaped tracing needle positioning frame and a personalized implant fixation bracket. The tracing needle is fitted into the central groove of the mandibular tracing needle fixation bracket via a shaft-hole fitting structure. The maxillary Gothic arch tracing plate is U-shaped and adapts to the maxillary dental arch. Both the mandibular tracing needle fixation bracket and the maxillary Gothic arch tracing plate are provided with screw channels for matching fixing screws. The method for determining digital jaw position relationships includes: taking a digital impression; designing and 3D printing the above components using CAD / CAM; determining the vertical distance and centric relationship using the personalized Gothic arch; and transferring the maxillary-mandibular relationship for edentulous full-mouth implant restoration based on occlusal records and electronic facebow data, thereby improving the clinical applicability of the restoration.

The dental assembly comprises a first tooth socket and a second tooth socket which correspond to maxillary teeth and mandibular teeth respectively, and a plurality of retention structures, the first tooth socket is provided with a first buccal surface and a first lingual surface which are oppositely arranged, and the second tooth socket is provided with a second buccal surface and a second lingual surface which are oppositely arranged; the retention structures are connected with the first buccal surface and the second buccal surface, or the retention structures are connected with the first lingual surface and the second lingual surface, the dental assembly comprises a first half jaw and a second half jaw which are positioned on two sides of a dental midline, and the plurality of retention structures comprise a first retention structure and a second retention structure which are positioned on the first half jaw. The first retention structure is closer to the tooth midline than the second retention structure. According to the invention, relative rotation and relative movement of the first tooth socket and the second tooth socket are limited through cooperation of the first retention structure and the second retention structure, so that the relative position between the first tooth socket and the second tooth socket can be effectively controlled, and the correction effect can be effectively improved, such as in an application scene of jaw position adjustment.

Disclosed in the present invention is a dental system, comprising two appliances corresponding to an N-th orthodontic treatment step and an (N+M)-th orthodontic treatment step, wherein N and M are both positive integers; each appliance comprises an occlusal plate structure connected to maxillary and mandibular arches; each occlusal plate structure comprises first portions arranged corresponding to maxillary teeth, and second portions arranged corresponding to mandibular teeth; when the occlusal plate structure is connected to the maxillary and mandibular arches, the first portions and the second portions abut against each other to form abutting surfaces; the two occlusal plate structures corresponding to the two appliances have different parameters; and the different parameters are configured to generate different acting forces and / or different torque when the occlusal plate structures are connected to the maxillary and mandibular arches. Different parameters of the present invention can enable two appliances to generate different acting forces and / or different torque, thereby satisfying orthodontic treatment requirements of different orthodontic treatment steps by means of the different acting forces and / or different torque.

According to the design and manufacturing method of the orthodontic postoperative intermaxillary traction device based on the invisible orthodontic device, CT scanning is conducted on a patient, craniomaxillofacial and tooth three-dimensional data are collected, and preparation is made for obtaining three-dimensional virtual tooth data of the patient through manufacturing of an anhydrite tooth model; data of a patient are imported into cranio-maxillofacial surgical operation planning software, a cranio-jaw virtual model of the patient is established, a manufactured anhydrite tooth model is subjected to three-dimensional scanning, dentition data are obtained, a maxillary tooth bone section is moved to a target position through a simulated operation on the virtual cranio-jaw model, and the patient is subjected to cranio-maxillofacial surgical operation planning software. And then determining a target position of a mandibular tooth bone section based on a final occlusion relationship, importing dentition data of the patient into three-dimensional virtual design software, performing Boolean operation, and manufacturing a traction device by using a three-dimensional printing technology. According to the device, assistance of methods such as a dental arch splint and an intermaxillary traction nail is not needed, intermaxillary elastic traction can be carried out after an invisible orthodontic patient completes a orthodontic operation, and it is ensured that the occlusion relation after the orthodontic operation meets the requirement.

To provide an improved mouthguard A that allows users to drink water without using their hands while wearing it in their mouth, even while riding a motorcycle, bicycle, or other vehicle. [Solution] The present invention provides an improved mouthguard that allows drinking water to be performed while being worn in the mouth of a person, comprising a mouthguard body 1 that abuts against the upper jaw teeth and a water passage 2 attached to the mouthguard body 1, through which water can be supplied to the mouth, the mouthguard body 1 has an inner wall portion 13 that encloses and holds the upper jaw teeth, an outer wall portion 14 and a bottom wall portion 15 that connects the two, the outer wall portion 14 has a bulging portion 14A that bulges outward and is provided in the bulging portion 14A for insertion of the water passage 2, and the tip portion 22 of the water passage 2 is housed in the bulging portion 14A, the improved mouthguard A.

A dental appliance is disclosed. The appliance may include an arcuate base shaped to extend along at least a portion of an upper dental arch of a patient and match with a custom fit at least certain maxillary teeth of the patient. The appliance may further include a tongue-retention feature. The tongue-retention feature may connect to the arcuate base and comprise a palatal portion and a sublingual portion. The sublingual portion may cooperate with the palatal portion to form a cavity shaped to receive an anterior portion of a tongue of the patient therewithin. The palatal portion may have an exterior surface custom-formed to match at least a portion of a hard palate of the patient.

A clear aligner, comprising a shell-shaped body and a tongue muscle training member, wherein the shell-shaped body has a cavity for accommodating a plurality of maxillary teeth; and the tongue muscle training member is connected to the lingual gingival margin of the shell-shaped body or adjacent to the gingival margin, and has a sensing cavity and a sensing port exposing the sensing cavity, the sensing port being located on the lingual side of the tongue muscle training member. A user trains tongue muscles by touching the sensing port with their tongue and partially extending their tongue into the sensing cavity, such that a relatively good sense of experience and enjoyment are provided, the enthusiasm of the user for training can be stimulated, and a tongue muscle training effect is improved.

The present application provides a kind of dental appliance, dental treatment system, dental appliance design method and preparation method, including the first shell body containing maxillary teeth and the second shell body containing mandibular teeth, the position of the first shell body posterior occlusal surface is provided with protrusion part to the opposite jaw direction, the protrusion part is used to induce and adjust the protrusion part of the upper and lower jaw position relationship, the second shell body dental occlusal surface is provided with guide part, the guide part is used to guide the protrusion part to the normal upper and lower jaw position relationship, the protrusion part and the guide part are respectively provided with the contact surface of mutual action to induce and adjust the upper and lower jaw position relationship;The protrusion part is provided with holding part to the opposite jaw occlusal surface, and the holding part is stably contacted with the second shell body;When the first shell body and the second shell body interact, the guide part guides the protrusion part to move, and simultaneously, the protrusion part moves to the predetermined position, so that the holding part is stably contacted with the occlusal surface on the second shell body.

The invention provides an occlusion induction appliance for a tooth replacement period, an orthodontic system for guiding jaw growth in the tooth replacement period and a design method of the orthodontic system. The occlusion induction appliance for the tooth replacement period comprises an upper jaw tooth socket and a lower jaw tooth socket, a lower jaw brace; the intermaxillary connecting body is positioned between the occlusal surfaces of the back tooth areas of the upper jaw tooth socket and the lower jaw tooth socket; wherein the upper jaw tooth socket and the lower jaw tooth socket form a rigid integral structure which cannot move relatively on an occlusal surface through the intermaxillary connector; the intermaxillary connecting body has a preset thickness so as to open occlusion contact of upper and lower anterior teeth in a wearing state, and the intermaxillary connecting body is configured to lock the lower jaw tooth socket at a preset three-dimensional space position relative to the upper jaw tooth socket body; when the occlusion induction appliance for the tooth replacement period is worn, the upper dentition and the lower dentition serve as integral interactive anchorage, and the occlusion force is converted into the orthodontic force acting on the dentition or the jaw bone.

The invention relates to the field of toothbrushes, and more particularly to a toothbrush (10) comprising a toothbrush head (12) made of three treatment structures (14, 16, 17) adapted to simultaneously treat opposite maxillary and mandibular teeth, wherein two of the treatment structures (14, 16) are substantially opposed to each other along the same plane and the third treatment structure (17) is placed between the previous two opposing treatment structures (14, 16).

1. Name of the design product: tooth arrangement tool plate. 2. Use of the design product: mainly used for the plane plate of maxillary teeth and mandibular teeth alignment. 3. Design points of the design product: in shape. 4. Picture or photo that best indicates the design points: perspective view.

This invention belongs to the field of anti-snoring technology, specifically a silicone anti-snoring device. It comprises an integrally molded silicone body consisting of an occlusal pad, an upper labial shield, a tongue induction screen, and a lower labial shield. Both ends of the upper and lower labial shields extend to the end face of the occlusal pad via buccal screens. A connecting portion exists between the occlusal pad and the tongue induction screen. This connecting portion is smooth and without protrusions in the Z-axis, and the corner surface of the occlusal pad away from the connecting portion is smooth. The smooth and non-protruding connecting portion in the Z-axis eliminates the palatal base of the maxillary teeth, making the tongue more easily lifted by the tongue induction screen. The tongue induction screen pushes the tongue from the floor of the mouth to the palatal side of the upper teeth, opening the airway and achieving buccal and lingual muscle balance. Patients can choose one, two, or three stages of mandibular protraction treatment based on their snoring symptom relief and temporomandibular joint symptoms. By protruding the mandible, the airway is further opened.

The application provides a maxillary canine orthodontic bracket for skeletal class III dental and maxillofacial deformity, a design method and equipment thereof, wherein the method for parameter design of the maxillary canine orthodontic bracket for skeletal class III dental and maxillofacial deformity comprises the following steps: acquiring craniofacial image information of a patient; obtaining a maxillary canine axial inclination angle according to the craniofacial image information; obtaining a score result of the maxillary canine according to the maxillary canine axial inclination angle and a maxillary tooth extraction scheme by using a preset maxillary canine compensation index evaluation standard; and determining an axial inclination degree of the maxillary canine bracket according to the score result.

The invention relates to the technical field of oral cavity plastic surgery, in particular to a manufacturing method of a digital buckle type guide plate for dental crown lengthening, which comprises the following steps of: 1, scanning an upper jaw dental arch and a lower jaw dental arch of a patient to obtain intraoral scanning data, recording an occlusion relationship at a maximum tooth tip staggering position, and exporting the data for later use; step 2, acquiring facial three-dimensional scanning data, alveolar bone and craniofacial structure data, digital facial arch data, mandibular position and mandibular movement parameters of the patient; 3, fitting various data to determine ideal gingival margin position parameters and bone trimming contour line parameters required in the operation; and 4, on the basis of the parameters determined in the step 3, buckle type guide plates are designed in design software, the buckle type guide plates comprise a gingival resection guide plate and an osteoplasty guide plate, and finally the buckle type guide plates are printed through a 3D printer. By implementing the buckle type guide plate prepared by the method, the stability, the accuracy, the operation convenience and the operation efficiency in the operation process of the dental crown extension surgery are remarkably improved.

This is a dental measuring tool used to check the degree of tooth grinding when grinding and capping teeth. As shown in the "Reference Front View," this tool consists of a gripping portion, an interocclusal measurement portion, and a grinding shoulder measurement portion. For example, when grinding and capping a lower jaw tooth, as shown in "Reference Figure 1 Showing the State of Use," the tip of the interocclusal measurement portion is inserted between the ground lower jaw tooth and the upper jaw tooth to measure the gap. Furthermore, as shown in "Reference Figure 2 Showing the State of Use," the grinding shoulder measurement portion is placed along the ground lower jaw tooth, and the shoulder (foot-like portion) of the lower jaw tooth is measured using the tip diameter of the grinding shoulder measurement portion, and the height of the lower jaw tooth is measured using the scale on the grinding shoulder measurement portion.

An implant (X) for supporting an upper-jaw dental prosthesis (Z) on the cranial bone (S), wherein the implant (X) has a receiving portion (ZA) for receiving the upper-jaw dental prosthesis (Z), and also a plurality of fastening portions (B1, B2, B3, B4), wherein the fastening portions (B1, B2, B3, B4) are connected to the receiving portion (ZA) and have at least one through-hole (DL) for receiving a fastening screw (BT), wherein the fastening portions (B1, B2, B3, B4) are formed at least by a first fastening portion (B1), a second fastening portion (B2) and a third fastening portion (B3), wherein the first fastening portion (B1) is designed to anchor the implant (X) on the lateral cranial base (S1), and wherein the second and third fastening portions (B2, B3) are designed to anchor the implant (X) on one of the following three cranial bone portions (S2, S3, S4): the pterygoid process (S2), the zygomatic bone (S3), and the maxilla (S4).

In a digital analysis of chewing, based on feedback principles and preferred optical marker position recognition, the interdependent movement patterns of maxillary and mandibular teeth are analyzed using bidirectional synchronization of tactile and motion image acquisition technologies, and their movements are recorded by a camera system. The camera system preferably integrates at least two systems, one on the right side of the mouth / face and the other on the left side, or one system is centered relative to the facial centerline. Each system has at least one (preferably three) camera, including at least one and preferably two monochrome or color cameras with a minimum resolution of 2.3 Mpx and a high frame rate of at least 1000 frames per second (FPS), equipped with dedicated optics / lenses, and at least one high-resolution and low-frame-rate color camera with a minimum resolution of 12 Mpx and a minimum frame rate of 25 FPS, capable of recording markers (M1) indirectly fixed by positioning patterns, or markers directly / independently (M2 – preferably using IPA technology) affixed to the veneer surface of the crown of the maxillary natural / artificial tooth, and markers independently affixed to the veneer surface of the crown of the natural / artificial tooth. Because of the connection between the camera and the trigger card, their operation is synchronized in time and is responsible for recording the position / movement of the upper crown with M1 and / or M2 markings relative to the lower crown with M1 and / or M2 markings, as well as the position / movement of the upper and lower crowns with M1 and / or M2 markings relative to the alveolar bone of the upper and lower jaws and the patient's face with M2 markings, the markings being affixed to facial feature anatomical points. This is all recorded synchronously in video film technology, and then the 3D scans of the upper and lower teeth with M1 and / or M2 markings are stitched into the video film, wherein the scans are obtained through intraoral or extraoral scanning technology. Furthermore, it can convert the repositioning of M1 and / or M2 markers. Movements during patient chewing assessment are recorded by a camera system, and the captured images are transcribed into a software environment. Digital acquisition of data from the M1 and / or M2 optical markers is submitted for further analysis in the software environment, enabling the conversion of these marker repositionings into the number of collisions between the upper and lower crowns, on which M1 and / or M2 markers are fixed. This is preferably read by a tactile device, preferably a tactile manipulator, to map / control the repositioning caused by these collisions via vibrations at a frequency between 1 and 4 kHz. The above arrangement enables the tracking of the amplitude of height changes in the collision angle, which is above / below 10 degrees between the upper and lower crown pairs with M1 and / or M2 markers, within a set time unit, divided into time intervals, preferably 0.001 seconds. Along the path of each movement phase / chewing cycle, the number of vibrations of the tactile manipulator during the set time unit represents the contact / collision moments of these crown pairs with M1 and / or M2 markers. The pattern on the crown of the natural / artificial tooth positioned on the implant consists of two separable components, including a prefabricated external component that extends out of the mouth and an internal component.The external component has at least three markings at its tip. The internal component is individually designed and customized to fit the veneer surface of the patient's tooth crowns. The digital chewing recorder, located within a single housing, simultaneously records the three-dimensional shape of the face from either the right or left side. Two sets of cameras are located at the two ends of the arched opening, independently or simultaneously recording both sides of the patient's mouth and face, as well as the visual markings M1 and / or M2 fixed to the crowns of the upper and lower teeth. Each camera set includes three cameras spaced at predetermined distances. Each set has two monochrome or color cameras with a maximum resolution of 2.3 Mbps and a high frame rate of at least 1000 FPS, equipped with dedicated optics / lenses, and one color camera with a minimum resolution of 12 Mbps.

A mandible adjustment device comprises an upper teeth brace and a lower teeth brace wherein the upper teeth brace and the lower teeth brace have an upper teeth accommodation space and a lower teeth accommodation space, respectively: the upper teeth accommodation space and the lower teeth accommodation space are developed according to a user's dental pattern for matching a human being's maxillary dental arch and mandible dental arch, respectively; the upper teeth brace and the lower teeth brace laterally extend a mucosa protection device opposite to an upper molar area and a positioning part opposite to a lower molar area, respectively. The upper teeth brace and the lower teeth brace, both of which have been installed, drive the positioning part and the mucosa protection device to combine each other and keep a flexible displacement space for neither discomfort at a condyle of the mandible.

The application discloses a method, device and equipment for establishing a virtual jaw frame, acquires a medical image of a patient, determines anatomic related mark points and upper and lower dental arch key points from the medical image, establishes a virtual cranial maxillary coordinate system and a mandibular coordinate system according to the anatomic related mark points, and determines the positions of the upper and lower dental arch key points in the coordinate system. The upper dental arch key points in a laser scanning tooth model of the patient are aligned with the same key points in the cranial maxillary coordinate system, and the laser scanning tooth model is added to the cranial maxillary coordinate system. The lower dental arch key points in the laser scanning tooth model are aligned with the same key points in the mandibular coordinate system, and the laser scanning tooth model is added to the mandibular coordinate system. Any point in the upper and lower dental arches in the laser scanning tooth model can be found in the corresponding position in the cranial maxillary coordinate system or the mandibular coordinate system, a highly personalized virtual jaw frame is established in a digital way, and the real situation of the patient is simulated in the morphological aspect to the maximum extent.

This invention discloses a gingival protection device for intermaxillary traction after orthognathic surgery, along with its manufacturing and usage methods. The device is a gingival protection bracket worn on the maxillary dentition, comprising a labial / buccal cover, a palatal cover, a blocking portion, and a connecting bridge. The labial / buccal cover conforms to the highest point of the tooth crown, while the palatal cover conforms to the entire palatal surface of the tooth crown, positioned between the intermaxillary traction rubber band and the gingival soft tissue. The blocking portion forms a protruding structure along the dentition direction on the labial side of the anterior teeth, mechanically limiting the intermaxillary traction rubber band during intermaxillary traction. The connecting bridge connects the labial / buccal cover and the palatal cover together in the posterior molar region on both sides. This device effectively blocks the direct action of the traction rubber band on the gingival soft tissue without affecting postoperative occlusal adjustment, improving posterior traction and occlusal stability and comfort, and aiding in rapid patient recovery. Furthermore, it balances wearing stability with the convenience of patient self-disposal.

The present invention discloses an oral scanning method and an oral scanner based on the fusion of posture information and point cloud data, which belongs to the field of medical devices and includes the following steps: S1, selecting facial feature points with fixed positional relationships relative to the maxillary alveolar ridge and the mandibular alveolar ridge as facial markers for marking; S2, calculating the spatial positions of the oral scanning sensor and the posture sensor fixed on the oral scanner relative to the facial markers; S3, obtaining multi-angle point cloud data; S4, obtaining full-mouth point cloud data; S5, obtaining an intraoral scan model; S6, reconstructing a three-dimensional digital model of the soft and hard tissues of the edentulous jaw; S7, using image processing software to calculate the soft tissue thickness of the edentulous jaw area in the three-dimensional digital model of the soft and hard tissues of the edentulous jaw. The present invention adopts the above-mentioned oral scanning method and oral scanner based on the fusion of posture information and point cloud data, which can significantly reduce or avoid errors that occur in the splicing process of oral scanners that only rely on point cloud data, and improve the accuracy and efficiency of edentulous jaw digital impressions.

The invention discloses a midline positioning ruler for orthognathic surgery and a manufacturing method thereof, and relates to the technical field of medical instruments. The method comprises the following steps: designing a multi-curve positioning rule main body; drawing a limiting structure and a retention structure on the positioning ruler main body; a buckle is virtually designed, and a clamping groove is drawn in the buckle; performing maxillofacial region scanning on the target object, and making an anhydrite tooth model; establishing a virtual three-dimensional cranio-jaw model, performing laser scanning on the anhydrite tooth model to obtain virtual dentition data, and replacing the dentition data in the maxillofacial region data with the virtual dentition data; the positions of the positioning rule main body and the buckle are adjusted; the buckle and the middle occlusion guide plate are virtually connected into a whole; and manufacturing a positioning ruler main body through laser cutting, and performing integrated three-dimensional printing on the buckle and the middle occlusion guide plate. The midline positioning ruler is used for quickly positioning the midline of the maxillary dentition in the orthognathic operation, so that the operation precision is improved, the operation time is saved, the operation efficiency is improved, and the dependence of the operation on the experience of doctors is reduced.