166 results about "Maxilla/Maxillary" patented technology

A facemask and accessories which overcomes the adverse effects and limitations of current designs by moving the maxilla and mandible in forward direction, which assists in correcting maxillary and mandibular skeletal and dentoalveolar deficiency and help expand the upper airway by advancing the mandible. This is accomplished by a design that is supported only by forehead and produces forces in front of maxilla and mandible. The extra-oral facebow design is characterized by providing two independent force adjustments, one above the forehead and the other one in front of the face by attachments to the upper and lower jaw bones and teeth. In particular, the two independent adjustments are provided by a fully adjustable forehead pad and bilateral adjustable bows on opposite sides of the facebow's extra-oral frame to provide protracting forces.

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 maxilla holder includes a base plate and a connecting member. One end of the connecting member is connected with the base plate which extends along a pre-designed occlusal plane while the other end of the connecting member includes at least two supporting portions. With the supporting portions abutting against the cranium, the base plate is positioned so that the maxilla is located in a pre-planned position once it is moved onto the base plate.

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 invention provides an adjustable snore preventing device and a manufacturing method thereof, and relates to the technical field of snore preventing devices, the adjustable snore preventing device comprises an upper jaw base and a lower jaw base, the upper jaw base and the lower jaw base can be arranged on the outer sides of upper teeth and lower teeth in a sleeving mode respectively, and a lower jaw limiting plate is arranged at the front end of the lower jaw base; the front end of the upper jaw base is connected with a first upper jaw limiting plate through a first adjusting mechanism, the first upper jaw limiting plate is used for being matched with the lower jaw limiting plate in a limiting mode, the rear end of the upper jaw base is connected with a second upper jaw limiting plate through a second adjusting mechanism, and the second upper jaw limiting plate is used for making contact with the rear end of the lower jaw base. The first adjusting mechanism and the second adjusting mechanism can adjust the first upper jaw limiting plate front and back and adjust the second upper jaw limiting plate up and down respectively; the snore-preventing device solves the problems that in the prior art, a snore-preventing device cannot be adjusted, the application range is limited, and individual differences of wearers are difficult to deal with.

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).

The utility model relates to the field of oral implants, and discloses a Z-shaped subperiosteal implant, comprising a bracket, a front wing and a rear wing connected with the bracket, wherein the front wing, the rear wing and the bracket are three-dimensional structures that conform to the maxillary bone of a human body; the bracket is used to be attached to the surface of the maxillary bone, and a plurality of bases are arranged along the length direction of the bracket, and one end of the base away from the bracket penetrates into the gums for fixing the bracket; the front wing and the rear wing are respectively arranged on both sides of the bracket in the width direction, the front wing is used to be attached and fixed to the surface of the canine support of the maxilla, and the rear wing is located on the side of the greater palatine foramen close to the maxilla and is used to be attached and fixed to the palate side of the maxillary posterior teeth area and the surface of the palatine bone; the rear wing part is placed on the palate side of the maxillary posterior teeth area and the surface of the palatine bone, which can avoid performing a large flap operation on the buccal side, simplify and shorten the operation process, reduce the difficulty, make the operation simpler and safer, and can also reduce the pressure of the implant on the soft tissues on the lip and cheek sides, avoid the occurrence of soft tissue retreat, and reduce the probability of peri-implantitis.

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.

The invention relates to a method for registering non-radiographic virtual models of a mandibular arch and a maxillary arch of an individual with a non-radiographic digital model of the face of said individual, comprising:fastening a mandibular marker rigidly on the mandibular arch of the individual, said mandibular marker defining a first frame of reference,providing a non-radiographic virtual model of the mandibular arch and a non-radiographic virtual model of the maxillary arch,digitising at least one portion of the surface of the teeth or a prosthetic device integral with said arch and at least one rigid portion of said marker by means of an intra or extra-oral camera, so as to produce a digital recording of said portions of the mandibular arch and the marker in a same second frame of reference,from said recording and the virtual models of the mandibular arch and the mandibular marker, matching the digital model of the mandibular marker with the marker, and the virtual model of the mandibular arch with said arch, and localizing the virtual model of the mandibular arch in the first frame of reference,acquiring a non-radiographic digital model of the face of the patient, andlocalizing the digital model of the face in the first frame of reference, so as to register the virtual models of the maxillary and mandibular arches with said digital model of the face.

The utility model discloses an auxiliary device for raising the maxillary sinus intima, and particularly relates to the technical field of maxillary sinus intima, which comprises a shell, a raising head for raising the maxillary sinus intima is fixedly arranged at the top of the shell, a silica gel block is fixedly embedded at the top of the raising head, air outlet holes are arranged at the top of the silica gel block and the top of the raising head, and the air outlet holes are communicated with the shell. A plurality of air outlets are formed in the outer side wall of the silica gel block and communicate with the air outlet hole, and a cavity is formed in the top of the shell and communicates with the air outlet hole. The shell and the lifting head move upwards, the silica gel block on the lifting head is used for jacking up the maxillary sinus intima, lifting of the maxillary sinus intima is achieved, then the push rod is pushed to drive the round plug to push bone meal in the cavity into the air outlet hole, and the bone meal is scattered into the maxillary sinus through the air outlet hole and the air outlet. And the space between the maxillary sinus intima and the maxillary sinus can be filled, so that the maxillary sinus intima is lifted, the structure is simple, and the use is very convenient.

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.