95 results about "Maxilla/Maxillary" patented technology

A series (100) of devices for assisting in the displacement of the chewing plane of a person (P) is explained, comprisingat least two devices (10),wherein the devices (10) each comprise at least one jaw device (11, 12),wherein the at least one jaw device (11, 12) comprises an upper jaw device (11) and / or a lower jaw device (12),and wherein the devices (10) are designed to be worn by the person (P) according to a predetermined sequence.In at least one device (10.1, 10.2), the at least one jaw device (11, 12) comprises at least one height element on a first side. At least two contact areas, preferably local contact areas, are formed on the at least one height element at mutually different positions of molar elements. At least one further contact area is formed on a second side of the at least one jaw device (11, 12), in particular a further local contact area. The at least three contact areas define the plane (GE),wherein the plane (GE) deviates from a starting chewing plane of the person (P) or from a current chewing plane of the person (P) with respect to its inclination changed by the at least one height element in a frontal section or sagittal section and / or deviates with respect to its height position changed by the at least one height element, andwherein in at least one other device of the series (100) a different inclination in a frontal section or sagittal section and / or a different height position of the respective plane is adjusted by at least one further height element, which differs from the at least one height element in the adjusted height.

The invention provides a computer-implemented method for determining the occlusion relationship of three-dimensional digital models of maxillary and mandibular dentitions based on tooth photos, which comprises the following steps: acquiring a first photo of teeth of a patient in an occlusion state, the first photo comprising a plurality of maxillary teeth and a plurality of mandibular teeth; obtaining a first three-dimensional digital model and a second three-dimensional digital model respectively representing the upper jaw dentition and the lower jaw dentition of the patient; rendering the first three-dimensional digital model and the second three-dimensional digital model to obtain a first rendering graph; predicting an optical flow between the first photo and the first rendering graph by using a trained optical flow neural network based on the first photo and the first rendering graph; and based on the optical flow, calculating a first spatial position transformation relationship which can transform the relative position relationship between the first and second three-dimensional digital models to a state closer to the bite state shown by the first photograph, with a solution to solve the PnP problem, and calculating a second spatial position transformation relationship which can transform the relative position relationship between the first and second three-dimensional digital models to a state closer to the bite state shown by the first photograph.

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.

Mandibular repositioning devices have a maxillary piece and a mandibular piece each of which is configured to cover a user's teeth. The maxillary piece has a right back teeth portion and / or a left back teeth portion and a driver flange protruding laterally outward from either or both thereof. Each driver flange has a driving side with a convex surface. The mandibular piece has a protrusive flange extending cranially therefrom and positioned with an engaging side thereof engaged against the driving side of the driver flange. The engaging side of the protrusive flange has a concave surface which mates with the convex surface of the driver flange when the mouth is closed and is in continuous contact thereagainst as a user moves their jaw downward, thereby providing gradual arcuate incremental forward mandibular movement as the concave surface of the protrusive flange smoothly glides against the convex surface of the driver flange.

The utility model discloses a dental component which comprises a first matching structure arranged corresponding to the tongue side or the cutting end of anterior teeth of an upper jaw and a second matching structure arranged corresponding to the lip side or the cutting end of anterior teeth of a lower jaw, and the first matching structure and the second matching structure are configured as follows: when the upper jaw and the lower jaw are occluded, the first matching structure is matched with the second matching structure; the first matching structure and the second matching structure abut against each other to generate force or moment, and the force or moment at least comprises lip tilting force corresponding to the anterior teeth of the upper jaw or lip tilting moment corresponding to the anterior teeth of the upper jaw. In the correction process, at least the maxillary anterior teeth generate lip inclination, firstly, the relative positions of the maxillary anterior teeth and the alveolar bone can be gradually adjusted, so that the maxillary anterior teeth are suitable for being pressed down; on the second aspect, the gap between the upper jaw anterior teeth and the lower jaw anterior teeth can be enlarged so that the first matching structure and the second matching structure can be conveniently installed and designed; and thirdly, the anterior teeth of the upper jaw have certain inclination, so that the anterior teeth of the lower jaw can interact with the anterior teeth of the lower jaw conveniently, and the anterior teeth can be depressed, adducted and the like conveniently.

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 utility model provides a bone anchorage type maxillary distraction osteogenesis device which comprises a spiral expansion device, and a rear base plate of the spiral expansion device is fixed to the rear half section of the maxillary bone through a left anchorage nail and a right anchorage nail. The front base plate and the rear base plate are respectively connected with at least two belt rings through belt ring connecting rods, the left front belt ring and the right front belt ring connected with the front base plate are at least sleeved on the first front molars on the corresponding sides, and the left rear belt ring and the right rear belt ring connected with the rear base plate are sleeved on the first molars and / or the second molars on the corresponding sides; the two front band rings are connected through a labial arch, and a lip baffle is fixed in the middle of the labial arch; a traction hook matched with a front tractor is fixedly connected to the outer ring face of the rear belt ring. According to the utility model, the osteotomy gap between the first premolar and the second premolar can be stably and effectively stretched, so that the aim of correcting skeletal hypoplasia or repairing bone defects is fulfilled.

The application discloses a kind of three-dimensional CBCT skull image fine granularity segmentation method and system.The present application includes the following steps: first, construct first training dataset;Then, in combination with first training dataset, after training secondary segmentation neural network model, obtain trained secondary segmentation neural network model;Then, using trained secondary segmentation neural network model to the three-dimensional CBCT skull image to be processed is segmented, and the segmentation result of each structure of skull is obtained;Finally, using the improved region growing method is carried out the segmentation of the bone cortex and bone marrow of upper and lower jaw bones, and the bone cortex and bone marrow segmentation result corresponding to upper and lower jaw bones is obtained, so as to complete the fine granularity segmentation of three-dimensional CBCT skull image.The method proposed in the present application can separate the fine granularity region of oral and maxillofacial region, including complete skull, upper and lower jaw bones, teeth, bone cortex, bone marrow, nerve canal, maxillary sinus, incisor canal and other structures.

To provide a dental set for open bite treatment, which can easily depress molars in a short period of time without causing extrusion of front teeth when it is necessary to depress molars in open bite treatment, thereby enabling open bite treatment. [Solution] The dental set for open bite treatment has a plurality of brackets (201) attached to the patient's maxillary or mandibular teeth, an orthodontic wire (11) attached to these brackets, and an intermaxillary elastic (400). When indenting a patient's maxillary molars, the intermaxillary elastic is stretched by attaching the orthodontic wire to the bracket attached to the crown of the maxillary canine from above and stretching it, then hooking it from below to the bracket attached to the crown of the mandibular canine, and further hooking it onto a bondable tube (202) attached to the crown of the mandibular first molar. The same applies when indenting a patient's mandibular molars.

Measuring device with a head bow as a carrier of motion sensors to be fixedly attached to the head of a person, as a functional component of a device for determining all degrees of freedom of movement of the mandible relative to the maxilla, in a middle part which is configured as a sensor carrier part and includes a nose support for support on the root of the nose, and two bracket parts attached to the ends of the middle part with joints, which are configured such that in the state of use they lie on the left and right sides of the head of the person above the ears in order to temporarily fix the head bow there, wherein within the middle part or fixedly connected to it is a sensor system for determining the acceleration, the attitude or the position.

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 utility model belongs to tools used for orthodontic treatment of oral and maxillofacial surfaces, and particularly relates to an improved orthodontic movable retainer for malocclusion. The problems that in the background technology, a steel wire used for manufacturing a labial arch and a clamping ring is a 09 steel wire and cannot be too thin, when the steel wire passes through an occlusal surface gap between 34 and 56, teeth are prone to being cushioned, the occlusal degree is too high, the tooth gap is prone to being widened, the adjacency relation of teeth is damaged, and a patient feels uncomfortable when wearing the steel wire are solved. If a groove is ground at the position, the problem of overhigh occlusion is solved. According to the technical scheme, an upper jaw base and a lower jaw base are fixedly connected with a hyperbolic labial arch through connecting steel wires respectively, a clamping ring is formed at the rear end of the hyperbolic labial arch, a check block is arranged on the arc top of the upper jaw base, and a traction curve is formed on the front portion of the clamping ring on the hyperbolic labial arch connected with the lower jaw base. The device is suitable for maintaining the oral and maxillofacial orthodontic state.

The invention discloses a biomechanical front traction reverse joint appliance which comprises an upper jaw front traction appliance body, and a traction indication structure with a connecting line mark is arranged between a traction structure of the upper jaw front traction appliance body and an impedance center of an upper jaw bone, so that a clinician can conveniently judge the position relation between a traction direction and the impedance center. The invention also discloses a specific manufacturing scheme of the appliance structure. The manufacturing scheme comprises the following steps: constructing a three-dimensional model of the jaw bone and the dentition of a patient based on oral cavity scanning and image examination of the patient, determining the resistance center of the maxilla bone, and constructing and displaying the structure on the appliance according to the connection line indication of the resistance center of the maxilla bone and the traction device. According to the invention, a doctor can conveniently formulate a reasonable traction direction according to different vertical bone surface types of a patient clinically, the prejudgment of the traction effect is increased, and the clinical treatment efficiency 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.

A method for modeling temporomandibular joint osteoarthritis, 6-week-old rats are selected, the rats are confirmed to have entered an anesthetized state before surgery, the rat's mandibular incisors are first checked and confirmed to be normal, the first arm of the device is sleeved on one side of the mandibular incisor, and the palatal side of the maxillary incisor is made to touch the slope surface of the second arm of the device, the device is checked and confirmed to not affect the rat's mandibular movement and occlusion, not significantly raise the bite, have no early contact, and the upper and lower jaw relationship is relatively stable; the device and the mandibular incisor sleeved with the device are fixed; then the rat is put back into the cage, and soft food or powdered feed is given after waking up; the device is removed after being fed for 8 weeks or more. It is verified that the condylar process of the rat changes significantly, the overall condylar process is significantly reduced, the subchondral bone is destroyed, and the expression of the cartilage matrix is also reduced. Thus, a TMJOA rat model exhibiting mandibular retrusion is formed.

FIELD: otorhinolaryngology.SUBSTANCE: under endotracheal anesthesia, an endoscope equipped with optics and an instrument for removing pathological contents of the maxillary sinus are inserted into the nasal passage. The inferior nasal concha is displaced medially using a raspatory. Then, stepping back from the edge of the piriform opening by 1.5–2.0 cm in the caudal direction, a mucoperiosteal flap of the lateral wall is separated in the lower nasal passage. The mucoperiosteal flap is displaced posteriorly, exposing the bone skeleton in the projection of the inferomedial angle of the maxillary sinus. Next, using a cold plasma coblator, in ablation mode, the mucous surface of the bone skeleton is evaporated for 2–3 seconds, followed by coagulation of small vessels. Then, a bone valve measuring 10–15 mm is formed from the exposed bone skeleton. The bony valve is retracted in the caudal direction, forming an antrostomy. A 70-degree endoscope is inserted through the formed antrostomy and the pathological contents of the sinus are visualized. In this case, if the cyst is visualized with a coblator in ablation mode, the cyst is evaporated along with its contents, and the remaining cyst is captured and removed. If a polyp is visualized, the polyp stalk is first evaporated, and then the remaining part of the polyp is removed. If a foreign body is visualized, it is removed with forceps. In this case, if the foreign body is encapsulated or located in the thickness of the mucosa, a coblator in ablation mode evaporates part of the mucosa until the foreign body is exposed, and then removed. Next, the sinus cavity is washed with saline solution. The antrostomy is closed with a bone flap. The formed mucoperiosteal flap is placed back in its original place.EFFECT: method allows for endoscopic endonasal removal of pathological contents from the maxillary sinuses with a minimal risk of cyst / polyp recurrence and postoperative complications, reduced blood loss during surgery, shortened surgical time, postoperative rehabilitation periods, and temporary disability.3 cl, 3 ex

The utility model relates to the technical field of orthodontic medical instruments, in particular to an invisible appliance with a jaw pad, which comprises an upper jaw appliance and a lower jaw appliance which are used for accommodating teeth, the jaw pad is arranged in a rear tooth area of the upper jaw appliance, the jaw pad is of a hollow structure protruding towards the opposite jaw direction, and the lower jaw pad is of a hollow structure protruding towards the opposite jaw direction. The jaw pad is matched with the occlusal surface of the occlusal teeth in an opposite occlusal manner; the width of the side, close to the anterior tooth end, of the jaw pad is smaller than that of the side, close to the posterior tooth end, of the jaw pad, the two side edges, in the dentition direction, of the jaw pad are each provided with a plurality of first inwards-concave structures, and the first inwards-concave structures are symmetrically arranged on the two sides of the jaw pad. According to the invisible orthodontic appliance disclosed by the utility model, the first concave structures are arranged on the two sides of the jaw pad along the arrangement direction of dentition to form reinforcing structures, so that the structural strength can be effectively enhanced, and meanwhile, the second concave structures are respectively arranged at the two ends of the jaw pad, so that the strength of the jaw pad is further improved, the occlusion strength of a tooth socket is improved, and the orthodontic effect can be effectively improved.

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 discloses an orthodontic device capable of continuously converting masticatory force into anterior tooth adduction force and a using method thereof.The orthodontic device comprises an upper jaw part used for converting masticatory force in the vertical direction into horizontal tension for adduction of anterior teeth, and the upper jaw part is installed on the buccal side of an upper jaw molar area of a patient; one end of the traction accessory is mounted on the upper jaw part, and the other end of the traction accessory is connected to the anterior tooth appliance; and the lower jaw part is fixed on the cheek side of the lower jaw molar area. The masticatory force is used as sustainable output force, the masticatory pressure in the vertical direction is converted into adduction anterior tooth force in the horizontal direction, and meanwhile, molar anchorage protection can be enhanced.

The invention relates to the technical field of oral implantation auxiliary tools, aims to solve the problems that an existing rigid stripping tool cannot reach an expected stripping range, a maxillary sinus mucous membrane is prone to being perforated, or the existing rigid stripping tool cannot effectively penetrate into a maxillary sinus for stripping, and provides a soft stripping tool set for the maxillary sinus mucous membrane. Comprising a soft buffer part, a soft stripping part and a depth-keeping spherical detection rod, the soft buffer component is used for being placed at the bottom of a sinus floor bone in a cavity after preliminarily breaking through the maxillary sinus floor; one end of the soft stripping part is used for stretching into the cavity and entering the maxillary sinus to strip the mucous membrane of the maxillary sinus, and the soft stripping part can expand to support and lift the mucous membrane of the maxillary sinus; the depth-keeping spherical detection rod comprises a rod body, the middle of the rod body is a handheld part, and the two ends of the rod body are connected with an eccentric disc and a sphere respectively. The device can effectively extend into the maxillary sinus for stripping, can effectively lift the mucous membrane of the maxillary sinus, ensures that the stripping range can reach the expectation, realizes flexible stripping, and can effectively avoid perforation of the mucous membrane of the maxillary sinus.

The invention relates to the technical field of orthodontics, in particular to an appliance suitable for low-angle Angle class II classification 2 patients. Comprising a base plate covering a palatal soft tissue area of an anterior tooth area of an upper jaw, a built-in spiral arch expander, a long arrow clamp and an adjacent hook which are arranged in a posterior tooth area of the upper jaw, a hyperbolic labial arch which is arranged on the labial side of the anterior tooth and of which the tail end is fixed in the base plate, and an elastic supporting piece arranged on the palatal side, one end of the elastic supporting piece is a fixed end, the other end is a free end, the fixed end is inserted and fixed in the base plate, and the free end points to and lightly touches the palate side of the upper anterior teeth; an anatomical flat guide face matched with lower teeth is arranged at the position, making contact with the lower teeth, of the base plate, and a guide groove used for guiding the lower front teeth to be limited front and back is formed in the lip side of the anatomical flat guide face. The lip side of the base support is further provided with an incisor tooth cap used for guiding left and right retention of lower jaw incisor teeth, and the guiding groove and the incisor tooth cap are matched with the anatomical form of a lower tooth body.

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.

The utility model provides an appliance for correcting Angler class III malocclusion. Comprising an upper jaw casting type expansion device, a lower jaw casting type lip shield and an elastic connecting piece, and the upper jaw casting type expansion device comprises a spiral expander, a front palatal bar, a rear palatal bar, a palatal side connecting rod, an anterior tooth separated palatal arch, a cheek side traction hook, an upper jaw first premolar casting belt ring and an upper jaw first molar casting belt ring; a cheek tube is arranged on the upper jaw first molar casting belt ring; the lower jaw casting type lip shield comprises a labial arch, a lingual arch and a lower jaw first molar casting belt ring, and a lip shield traction hook is arranged at the front part of the labial arch; the elastic rubber ring is used for traction between the cheek tube and the lip shield traction hook of the appliance, and is matched with the rapid expansion and contraction of the maxillary to achieve the effect of correcting III-type malocclusion, so that a patient can wear the appliance all day long, the development of the maxillary bone is promoted, the correction period is accelerated, and the appliance does not need to depend on a mask tractor outside the mouth.

The present invention relates to an orthodontic appliance (1) adapted to fit the maxilla of a patient comprising A) at least one central retractor (2) incorporating an expansion screw (4) allowing its retraction and that, consequently, of the maxillary arch (MA) of the patient, which central retractor (2) is integral with: A1) A first symmetrical pair of posterior retention arms (5), each retention arm (5) being coupled to a ring (3) of a first pair of rings (3) allowing the fixation of the appliance (1) on the right and left permanent molars of the maxillary arch (MA) of the patient, at least one of the rings (3) also constituting the distal element of a distalization assembly (12) comprising at least two elements, A2) At least one symmetrical pair of anterior retention arms (8) which bears against the palatal surface of teeth anterior to the right and left molars to which the first pair of rings (3) are fixed right and left;A3) A second symmetrical pair of posterior retention arms (6), each retention arm (6) being formed of two distinct segments with a first segment coupled to a ring (3) of the first pair of rings (3) and a second segment coupled to the central spreader (2), which first and second segments are associated by a joint (7).

The invention provides a false tooth parallel occlusion position determination method based on oral cavity scanning data registration and a related device, and belongs to the technical field of oral cavity false tooth restoration. The method comprises the following steps: randomly selecting a set of aligned oral scanning models from at least three sets of oral scanning models, and fixing the upper jaw of the randomly selected set of aligned oral scanning models to obtain a fixed upper jaw position; acquiring a parallel or approximately parallel region of the lower jaw of the randomly selected group of aligned oral scanning models, and determining a rotation angle of the lower jaw based on the parallel or approximately parallel region of the upper jaw and the lower jaw of the randomly selected group of aligned oral scanning models; rotating the lower jaw of a set of randomly selected aligned oral scanning models around a rotating shaft at a rotating angle to obtain the position of the rotated lower jaw; and determining a false tooth parallel occlusion position based on the fixed upper jaw position and the rotated lower jaw position. The problem that the efficiency of determining the parallel occlusion position of the false tooth is not high is solved.

In CT visualization software, zones of the right and left temporomandibular joints (TMJs) are visualized sequentially. In a frontal plane, each of the condylar processes of the TMJs are delimited into sections. In a sagittal plane, separate 3D contours of the fossae and the condyles of the TMJs are created. The contours of the condyles are combined with a 3D model of the mandibular teeth, and a 3D model of the mandible with the teeth and the condylar processes is obtained. The contours of the fossae are combined with a 3D model of the maxillary teeth, and a 3D model of the maxilla with the teeth and the contours of the glenoid fossae is obtained. The 3D scene objects obtained are distributed according to side and identification code, and precise tracking of the movement of the condyles and the fossae of the TMJs during movement of the mandible is provided.

The auxiliary tool comprises an upper elastic supporting wire and a lower elastic supporting wire, the two ends of the upper elastic supporting wire and the two ends of the lower elastic supporting wire are fixedly connected, and the distance between the upper elastic supporting wire and the lower elastic supporting wire is gradually increased from the two ends to the middle. The upper elastic supporting wire is provided with an upper left pressure transmission piece and an upper right pressure transmission piece, and the lower elastic supporting wire is provided with a lower left pressure transmission piece and a lower right pressure transmission piece. According to the application, the upper pressure transmission piece is connected with a lingual side buckling hook or a lingual button on the cheek side of the existing upper jaw invisible tooth socket, and the lower pressure transmission piece is connected with a lingual side buckling hook or a lingual button on the cheek side of the existing lower jaw invisible tooth socket, so that the upper and lower invisible tooth sockets are pulled through the elastic restoring force action of the upper and lower elastic supporting wires; and then the upper and lower anterior teeth are triggered to be pressed to open anterior tooth occlusion.

The utility model provides a maxillary alveolar bone segment traction device, which is characterized in that two opposite sides on an alveolar fracture are respectively a first side and a second side, and a dental bone corresponding to the first side is provided with an operation osteotomy line which is arranged at an interval with the first side; the maxillary alveolar bone segment traction device forms an osteotomy portion between the surgical osteotomy line and the first side by osteotomy along the surgical osteotomy line, the maxillary alveolar bone segment traction device includes two positioning cast crowns and a movable cast crown. According to the maxillary alveolar bone segment traction device, the positioning cast crowns are arranged on the molars on the two sides respectively, stable supporting is provided for the outer traction assembly and the inner traction assembly through the positioning cast crowns, and further, the outer traction assembly and the inner traction assembly can be matched with the elastic piece to provide arc-shaped guiding matched with a dental arch curve for the movable cast crowns; in addition, by arranging the traction assemblies on the inner side and the outer side of the dental arch, a good traction effect can be achieved.

The detachable edentulous maxillary model is characterized in that an outer half body is hooped on the peripheral side of an inner half body and is detachably connected with the inner half body; a bolt body is arranged at the bottom of the palate wrinkle piece, the top of the bolt body is fixedly connected with the bottom of the palate wrinkle piece, and the bottom of the bolt body is embedded in the top of the inner half body; a connecting piece is arranged between the maxillary nodule piece and the maxillary body, one end of the connecting piece is fixedly connected with the top of the maxillary nodule piece, and the bottom of the connecting piece is in threaded connection with the bottom of the inner half body. A teacher can display different parts of the maxillary according to needs, for example, palate wrinkles or nodules are independently displayed, students can better understand the complex structure of the edentulous maxillary, the students or trainees can personally disassemble and assemble the model, and the understanding of oral edentulous maxillary anatomical markers is deepened. In a doctor-patient communication process, a doctor can display each part of the model and explain the structure and the function of maxillary tissues to a patient in detail, so that the understanding of the patient on oral health problems is improved.

The invention provides an upper jaw mesial inclined molar centralizing device which is characterized in that a palate support (1) is connected with a bow arm (2), two end parts of the bow arm (2) are respectively connected with at least one anchorage tooth lantern ring (3), the end part of the bow arm (2) on one side of an inclined molar (4) extends to form an extension section (2a), the extension section (2a) is positioned on the outer side of the inclined molar (4), and the tail end of the extension section (2a) is provided with an S-shaped hook head part (5). A group of hook parts (6) are also arranged on the extension section (2a); and an elastic traction belt (7) which is hooked with any tongue side buckle (4a) on the inclined molar (4) is hooked on the hook parts (6) or the hook head parts (5). The device has the advantages of being simple in structure, convenient to use, adjustable in traction angle and force value, definite in curative effect, high in comfort degree, free of cooperation of patients and the like.