129 results about "Maxilla/Maxillary" patented technology

The invention belongs to the technical field of stomatology, and particularly relates to an upper jaw fixing expansion appliance which comprises a spiral expansion device, a plastic base, a connecting rod, a retention device and a dental retraction traction hook. The spiral expander is positioned in the center of the appliance, and the plastic base plate is two parts which are separated from each other in the center and connected with the spiral expander and covers the hard palate part of the upper jaw. The retention device is composed of a milk molar or premolar casting continuous belt ring and a first molar independent casting belt ring. And the left and right dental retraction traction hooks are positioned in the plastic base and are used for retracting and pressing the first molar of the upper jaw of buccal inclination after the expansion of the arch. The appliance disclosed by the invention is wide in clinical application range, and is suitable for light and moderate teenager patients with lateral maxillary development insufficiency and maxillary posterior tooth buccal inclination compensation. According to the invention, a good bony expansion effect can be realized for patients in a replacement dentition stage or a permanent dentition early stage and patients in rapid maxillary expansion, and excessive buccal inclination and movement of teeth are reduced.

The embodiment of the invention discloses a method for measuring a buccal-lingual torque value of maxillary molar based on improved ResNET. The method comprises the following steps: acquiring and preprocessing three-dimensional images of teeth and alveolar bones, and performing three-dimensional reconstruction on the preprocessed images; based on the coupling relationship between the dental crown and the tooth root, positioning a first tooth long axis; positioning a second tooth long axis based on the coupling relationship between the tooth and the alveolar bone; calculating an included angle between the first tooth long axis and the second tooth long axis and generating a new long axis; calculating and verifying a buccal-lingual torque value of the maxillary molar; through the automatic process, the accurate measurement and calculation of the upper jaw first molar torque value are realized, and the effectiveness and accuracy are improved.

The invention discloses a CBCT (Cone Beam Computed Tomography) image distance determination method and device for maxillary sinus and maxillary posterior teeth, a medium and a product, and relates to the field of image processing, the method comprises the following steps: acquiring CBCT images of maxillary sinus and maxillary posterior teeth; according to the CBCT images of the maxillary sinus and the maxillary posterior teeth, performing three-dimensional segmentation of the maxillary sinus and the maxillary posterior teeth by adopting a structure segmentation model; the structure segmentation model is constructed based on a deep learning network; according to a three-dimensional segmentation result, generating a surface mesh model based on a marching cube algorithm; determining point cloud data based on a point cloud generation algorithm according to the surface mesh model; according to the point cloud data, the nearest distance between the maxillary sinus and the maxillary posterior teeth and the corresponding nearest apical point of the maxillary posterior teeth are determined; and determining the position relationship between the maxillary sinus and the maxillary posterior teeth according to the nearest distance, and classifying the position relationship. The distance between the maxillary sinus and the maxillary posterior tooth can be efficiently and accurately measured, and the position relation can be judged.

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 invention discloses a fine-grained segmentation method and system for a three-dimensional CBCT skull image. The method comprises the following steps: firstly, constructing a first training data set; thirdly, in combination with the first training data set, training the secondary segmentation neural network model to obtain a trained secondary segmentation neural network model; then, segmenting a to-be-processed three-dimensional CBCT skull image by using the trained secondary segmentation neural network model to obtain a segmentation result of each structure of the skull; and finally, segmenting the bone cortex and cancellous bone of the upper and lower jawbones by using an improved region growing method to obtain a bone cortex and cancellous bone segmentation result corresponding to the upper and lower jawbones, thereby completing fine-grained segmentation of the three-dimensional CBCT skull image. According to the method provided by the invention, fine-grained areas of the oral maxillofacial region can be separated, and the fine-grained areas comprise intact skull, upper and lower jawbone, teeth, bone cortex, cancellous bone, neural tubes, maxillary sinus, incisor canals and other structures.

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.

The invention relates to a kit (100) consisting of a device for gradually changing the position of teeth of a person (P), comprising at least two devices (10), each device (10) comprising at least one jaw device (11, 12), the at least one jaw device (11, 12) being designed such that a receiving region of the jaw device (11, 12) can be placed on a dental arch of an upper jaw (OK, 5) or a lower jaw (UK, 4) of the person (P), the device (10) is designed in such a way that, when the device is worn according to a predetermined sequence of the device (10), the device progressively changes the tooth position by mechanical interaction of the device and the at least one tooth element. The at least one jaw device (11, 12) of the first device (10.1, 10.2) can have a first contact element (N.I.1.2, N.IV.1.2) on the outer side thereof as a sub-region of the first device (10.1, 10.2). The at least one jaw device (11, 12) of the second device (10. N) can have a second contact element (N.I.1. N, N.IV.1. N) on the outer side thereof as a sub-region of the second device (10). The first facing element (N.I.1.2, N.IV. 1.2) can be located at the same position as the second facing element (N.I.1. N, N.IV. 1. N) according to the dental scheme. The receiving region of the first facing element (N.I.1. 1.2, N.IV.1. 1.2) can be designed differently from the receiving region of the second facing element (N.I.1. N, N.IV.1. N) and / or has a different position from the receiving region of the second facing element (N.I.1. N, N.IV.1. N), said difference being suitable for causing a gradual migration of the tooth element, and wherein the tooth element is arranged in the receiving region of the second facing element (N.I.1. N, N.IV.1. N). The front side wall thickness of the second facing element (N.I.1. N, N.IV.1. N) is different from the front side wall thickness of the first facing element (N.I.1.2, N.IV.1.2).

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.

The utility model discloses a jaw position relation positioning device, relates to the field of false tooth manufacturing auxiliary tools, and can solve the problem that the jaw position relation of a patient is difficult to accurately judge due to the fact that a wax rim adopted in the prior art is easy to deflect in the horizontal direction in the jaw position relation measuring process. The jaw position relation positioning device comprises an upper jaw temporary base used for being located on the upper jaw of a patient and a lower jaw temporary base used for being located on the lower jaw of the patient, the upper jaw temporary base is connected with a wax rim and a tracing plate located on the inner side of the wax rim, and the lower jaw temporary base is connected with a tracing needle. A needle head of the tracing needle faces the tracing plate, and a marking layer matched with the needle head of the tracing needle is arranged on the side, close to the tracing needle, of the tracing plate, so that the needle head of the tracing needle carves a jaw position trajectory on the marking layer along with relative movement of the upper jaw temporary base and the lower jaw temporary base.

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.

The present invention discloses an oral tongue-isolating lighting device, which belongs to the technical field of oral equipment and comprises a mandibular frame, side arms and an upper jaw, wherein the lower curved wall is fixedly embedded in the upper surface of the mandibular frame, side grooves are arranged on both sides of the mandibular frame, elastic parts are assembled in the side grooves, one end of the side arm is fixedly connected to a side shaft, the side shaft is rotatably inserted into the side groove, and the side arm is movably abutted against the elastic part, and both ends of the maxillary frame are fixedly connected to the maxillary arms, which are respectively assembled and connected to the two groups of side arms. The present invention movably assembles the maxillary frame on the top of the mandibular frame, which can provide auxiliary support for the upper and lower jaws of the patient during treatment, reduce the soreness of the patient's facial muscles, and at the same time can utilize the patient's biting action to autonomously control the flow rate of the pump suction, facilitate the patient to freely adjust the intensity of the pump suction, and save the step of the therapeutic personnel manually sucking up the dirty liquid. The flow of liquid can also be used to dissipate heat from the lighting lamp to prevent the lamp source from overheating and causing discomfort to the patient.

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 invention relates to a computer-implemented method for processing an image of a dentate region of interest of a patient, the method comprising: a) obtaining an image of the jaws of a patient on which a region of interest is defined comprising a dentate sector with one or more teeth to be extracted; b) processing the region of interest in order to predict at least one edentulous sagittal 2D section, referred to as edentulous 2D section, the edentulous 2D section being a sagittal section perpendicular to the occlusion curve representative of a residual bone volume of a bony plate at an extraction site after extraction and healing, the processing implementing at least one model for predicting an edentulous section trained on the basis of pairs of dentate and edentulous 2D sections that are symmetrical with respect to the axis of symmetry passing through the middle of the mandibular symphysis of a reference patient for the lower jaw and by the median axis passing through the nasal spine for the upper jaw.

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.

A method of capturing fit and tooth position information for creating a full arch prosthesis by forming the maxillary base plate with the occlusal rim having an anterior segment, a pair of posterior segments, a plurality of horizontal reference lines vertically spaced relative to one another corresponding with the average length of the clinical crown of upper central incisors, and a plurality of shim members connectable to the anterior segment. The position of the patient's smile is evaluated relative to a selected reference line of the maxillary base to obtain a desired position of an upper incisal edge represented by a lower surface of the anterior segment. If the position of the upper incisal edge is not satisfactory, a shim member is connected to the lower surface of the anterior segment, and the position of the patient's smile is reevaluated.

The present invention relates to the technical field of oral orthodontics, and in particular to a magnetic traction device for high-impacted maxillary central incisors, comprising a first magnet assembly, a second magnet assembly, and a support assembly, wherein the first magnet assembly is arranged on the labial and lingual surfaces of the crown of the high-impacted maxillary central incisor; the support assembly is arranged in the middle of the teeth on the mesiodistal side of the high-impacted maxillary central incisor and is fixedly connected to the adjacent teeth on the mesiodistal side of the high-impacted maxillary central incisor; the second magnet assembly is arranged on a side of the support assembly close to the first magnet assembly (the second magnet assembly and the first magnet assembly are attracted to each other) and is connected to the support assembly; the support assembly is used to support the second magnet assembly and allow the second magnet assembly to adjust its position along the length, width, and axial directions of the support assembly. The traction device is non-contact traction when in use, which can avoid mucosal damage; the direction of magnetic traction can be automatically adjusted, and the stability of the traction force is improved.

The invention relates to a maxillary molar distalization device which comprises an anchorage nail, a first fixing piece, a transverse palatal bar, a second fixing piece and an adjusting column, and the anchorage nail is used for integrally installing and fixing the device in the center of the maxillary palatal part of a patient. The first fixing piece is arranged on the anchorage nail, and the two sides of the transverse palatal bar are used for adhering teeth. The second fixing piece is arranged on the transverse palate bar, one end of the adjusting column is rotationally connected with the second fixing piece, the other end of the adjusting column is in threaded connection with the first fixing piece, and the distance between the first fixing piece and the second fixing piece is adjusted by rotating the adjusting column. Compared with the prior art, the maxillary molar distalization device provided by the invention has the advantages that the orthodontic effect can be realized only by placing the anchorage nail once, and the maxillary molar distalization device has the advantages of high operation convenience and higher orthodontic stability.

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.