84 results about "Posterior Tooth" patented technology

The invention discloses a digital stable jaw pad designing and manufacturing method, and relates to the technical field of oral rehabilitation and digital medical technology.The digital stable jaw pad manufacturing method comprises the following steps that a, three-dimensional point cloud data of oral dentition and mucosa of a patient is obtained through a three-dimensional scanner; b) determining a stable jaw position coordinate model by using an optical motion capture system; c) designing a jaw pad three-dimensional entity model with an anterior tooth area, a posterior tooth area and an edge structure based on the three-dimensional point cloud data and the stable jaw coordinate model; and d) manufacturing the jaw pad through 3D printing equipment, wherein the 3D printing equipment is formed by adopting a polyether-ether-ketone material. By integrating digital acquisition, design and manufacturing technologies, the pain point of a traditional method is solved, and personalized, high-precision and rapid manufacturing of the stable jaw pad is realized.

An orthodontic appliance system (10) includes an appliance (12). The appliance (12) is provided with a shell (22), and the shell (22) comprises a first pair of cavities (24) and a second pair of cavities (24). Each cavity (24) of the first pair of cavities is for receiving an anterior tooth (56). Each cavity (24) of the second pair of cavities is for receiving a posterior tooth (64). The housing (22) includes an intermediate cavity (24) between a first cavity (24) of the first pair of cavities (24) and a second cavity (24) of the second pair of cavities (24). Each intermediate cavity (24) is for receiving a tooth between an anterior tooth (56) and a posterior tooth (64). The intermediate cavity (24) may be larger in size relative to the teeth. The housing (22) has a plurality of walls (32, 34, 36, 40) that define a cavity (24). At least one wall (32, 34, 36, 40) of the intermediate cavity (24) contains a rigidity enhancing region (42) extending from a first cavity (24) to a second cavity (24) of the pair of cavities (24). The region (42) may be a structure such as a stiffening beam (50).

The invention provides a guide plate system for full-thickness splitting of a palate center seam and a manufacturing method of the guide plate system. The guide plate system comprises a front guide plate and a palate guide plate, the front guide plate comprises a front tooth area retention part and a front guide part, the front tooth area retention part is matched with an upper jaw front tooth area to limit the intraoperative position of the front guide plate, and the front guide part is provided with a front guide window which limits a vestibular sulcus area osteotomy line; the palate guide plate comprises a posterior tooth area fixing part and a palate guide part and limits a mucous membrane containing space, the posterior tooth area fixing part is matched with maxillary posterior teeth and part of palate mucous membrane to limit the intraoperative position of the palate guide plate, and the palate guide part is provided with a palate guide window which limits an osteotomy line of a palate center joint.

The invention provides an artificial intelligence-based preoperative evaluation system for maxillary posterior tooth region implantation, which comprises the following steps of: constructing an oral cavity CBCT (cone beam computed tomography) image library, and further constructing a maxillary sinus basic model, an oral cavity maxillary posterior tooth region implantation decision design model and an oral cavity maxillary posterior tooth region windowing bone grafting decision design model; constructing a maxillary sinus downstream task model according to the maxillary sinus basic model; inputting the to-be-detected oral cavity CBCT image data into the maxillary sinus downstream task model, and calling the oral cavity maxillary posterior tooth region implantation decision design model to generate a first decision or calling the oral cavity maxillary posterior tooth region windowing bone grafting decision design model to generate a second decision according to the output qualitative and quantitative characteristics, so as to carry out preoperative evaluation. According to the method, the different characteristics in the oral cavity CBCT image are intelligently identified in a whole process, and the optimal oral cavity maxillary posterior tooth area implantation decision is generated to carry out oral cavity maxillary posterior tooth area implantation preoperative evaluation, so that the reliability of the oral cavity maxillary posterior tooth area implantation preoperative evaluation is improved.

The invention provides a bur for preparing the lower gingival edge of a posterior tooth area, and relates to the technical field of dental bur, the bur comprises a working part and a handle part, the working part comprises a head part and a neck part, the neck part is connected between the head part and the handle part, and the head part comprises a round head part, a gradually-expanding part, an arc part and a gradually-shrinking part which are sequentially arranged from front to back; the joint of the arc part and the tapered part reaches the maximum diameter, the distance between the joint and the tail end of the head part is smaller than that between the joint and the front end of the head part, a cutting edge is arranged on the periphery of the divergent part and forms a cutting area, and the arc part and the tapered part are provided with smooth surfaces and form a guide area; the problems that in the prior art, a conventional machine needle does not have a targeted structural design for preparation of lower teeth of posterior gingiva, the operability is poor, and the trauma risk is high are solved.

Provided is an orthodontic appliance, comprising a fixed base (1) that can be bonded and fixed to a tooth surface, a movable wing (2), and a spring (3). The movable wing (2) is slidably positioned on the fixed base (1); a bottom surface of the fixed base (1) is machined with a bonding pattern, one end of the surface is machined with a wing base (12), and the middle of the wing base (12) is provided with a sliding groove (121) in a direction of the central plane; the movable wing (2) comprises an occlusal splint (21) and a sliding rod (22), and the sliding rod (22) is positioned in the sliding groove (121) and can move back and forth along the sliding groove (121); the spring (3) is sleeved on the sliding rod (22), and one end of the spring (3) abuts against the wing base (12) and always maintains a tendency in which the movable wing (2) is away from the wing base (12); the occlusal splint (21) can move toward the wing base (12) end under the driving of the tooth occlusal force and generate an orthodontic thrust on the wing base (12) by means of the spring (3). Using the occlusal splint (21) on the movable wing (2), the occlusal force generated by each occlusal action is picked up and converted into an adduction force on the anterior teeth, thereby forming a dynamic orthodontic process and minimizing the impact on the posterior teeth.

The application discloses a segmented orthodontic appliance for vertical non-adjustment of anterior and posterior teeth, comprising an anterior tooth mouth body and a posterior tooth mouth body, the anterior tooth mouth body comprises a plurality of anterior tooth wrapping bodies, adjacent anterior tooth wrapping bodies are rigidly connected or connected through force arms, the posterior tooth mouth body comprises a plurality of posterior tooth wrapping bodies, adjacent anterior tooth wrapping bodies are rigidly connected or connected through force arms; the anterior tooth mouth body and the posterior tooth mouth body are rigidly connected or connected through force arms; the force arms are used for directional force on the anterior teeth and / or the posterior teeth, and / or the force arms are used for force on the buccal side and / or the lingual side; there are at least two force arms, and there are at least one anterior tooth wrapping body or at least one posterior tooth wrapping body between adjacent force arms. The application adds a specific stress interruption mechanical structure in the middle segment of the tooth arch of the invisible appliance, so that the force mode of the appliance is optimized, and the treatment efficiency of the vertical non-adjustment of the anterior and posterior teeth is improved.

The embodiment of the invention relates to the technical field of digital design of medical instruments, and discloses an Angler classification automatic identification method, electronic equipment and a medium, the identification method comprises the following steps automatically executed by the electronic equipment: identifying characteristic parameters of characteristic teeth of upper and lower jaws of a patient from tooth data of the patient, the tooth data comprises at least part of rear teeth on the single side in an occlusion state, and the characteristic teeth belong to the part of rear teeth; according to the characteristic parameters, the relative position relation of the maxillary characteristic teeth and the mandibular characteristic teeth in the mesiodistal middle direction is determined; wherein the tooth data is a two-dimensional picture and / or a three-dimensional dental model; and according to the relative position relationship, determining Ansheng classification corresponding to the teeth of the patient, so that automatic identification of Ansheng classification is performed on the teeth of the patient, and doctors or professionals are helped to perform more accurate judgment.

The application discloses a design method of a jaw pad, a manufacturing method of an invisible orthodontic appliance and the invisible orthodontic appliance, and belongs to the technical field of tooth correction. The disclosed design method comprises the following steps: acquiring a digital dental and jaw model, wherein the digital dental and jaw model at least comprises a maxillary model, a mandibular model and a first occlusal model; constructing a second occlusal model according to the first occlusal model, wherein the second occlusal model comprises complete occlusal relationship information, and the occlusal relationship information at least comprises occlusal space parameters; determining a jaw pad setting area according to a comparison result of the occlusal space parameters and a preset occlusal threshold value, and forming a jaw pad on the jaw pad setting area, wherein the jaw pad is a structure capable of opening posterior teeth occlusion and is formed by closely connecting a plurality of ellipsoidal structures. The disclosed manufacturing method of the invisible orthodontic appliance and the corresponding invisible orthodontic appliance are both based on the disclosed design method. The application can design a reasonable structure of the appliance without depending too much on the experience of designers.

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 utility model relates to the technical field of orthodontic instruments, in particular to a chiffon-type open retainer for retaining after orthodontic treatment, which comprises an upper jaw component and a lower jaw component, and each of the upper jaw component and the lower jaw component comprises a base plate, a hyperbolic labial arch, a connecting steel wire and a snap ring. The clamping ring and the hyperbolic labial arch are integrally formed and arranged on the two sides of the hyperbolic labial arch, the hyperbolic labial arch and the clamping ring are arranged around the closed end of the base plate and connected with the base plate through a connecting steel wire, and the end, away from the hyperbolic labial arch, of the clamping ring extends into the base plate; a tongue grating is arranged on the base of the upper jaw assembly, and a rear tooth jaw pad is arranged on the base of the lower jaw assembly. The retainer disclosed by the utility model can maintain the stability of tooth arrangement, restrain the recurrence trend, assist in controlling jaw position change and improve the long-term stability of orthodontic treatment.

This invention discloses a posterior implant-supported anterior tooth intrusion aid, its force application method, and its application. The anterior tooth intrusion aid includes two implants and an intrusion arch. The two implants correspond to the spaces between the roots of the second premolar and the first molar on the left and right buccal sides, respectively. The left and right ends of the intrusion arch are rotatably connected to the left and right implants, respectively. The intrusion arch is arch-shaped, with its front end corresponding to the anterior gingival side. This posterior implant-supported anterior tooth intrusion aid uses posterior implants as anchorage to provide support force for anterior tooth intrusion. During the force application process, it has minimal additional impact on the posterior teeth, generating only a simple anterior tooth intrusion force. The intrusion effect is stable and controllable, reducing side effects. Furthermore, due to similar mechanical properties, it can be used to replace anterior anchorage screws for anterior tooth intrusion, avoiding the damage caused by additional anchorage screws.

The invention relates to the technical field of orthodontics, in particular to a buccal side embedded canine tooth traction guide plate and a traction method thereof.The traction guide plate comprises a fixing end and a traction end, the fixing end is of a rectangular structure, the fixing end is fixed to an orthodontic bracket and an orthodontic arch wire on rear teeth through metal ligature wires, and the traction end is connected with the metal ligature wires. A traction end is mounted on the side, close to the embedded teeth, of the fixed end, the traction end is of a bent arc-shaped structure, a first traction position and a second traction position are arranged on the traction end, and the traction end is connected with a traction site bonded to the embedded canine teeth through an elastic rubber chain so as to pull the embedded canine teeth; according to the invention, the arc-shaped traction end with the first traction position and the second traction position is designed, the first hook is utilized to realize inclined movement of the embedded canine from the embedded position to the target area in the first stage, and the plurality of second hooks are utilized to realize vertical positioning and fine position adjustment of the teeth in the second stage; the accuracy and controllability of a tooth moving path are improved, and the treatment period is shortened.

An orthodontic aligner includes a posterior segment configured to apply first forces to move a set of posterior teeth of a dental arch of a patient. The orthodontic aligner further includes an anterior segment configured to apply second forces to move a set of anterior teeth of the dental arch. The orthodontic aligner further includes a connector that joins the posterior segment and the anterior segment. The connector is configured to isolate the first forces from the second forces. Isolation of first forces from the second forces enables: a) the first forces to be applied to the set of posterior teeth without substantial interference from the second forces applied to the set of anterior teeth; and b) the second forces to be applied to the set of anterior teeth without substantial interference from the first forces applied to the set of posterior teeth.

The application provides a personalized hydrostatic pressure jaw pad, comprising a jaw pad body and a retaining device, the jaw pad body has a cavity filled with semi-fluid arranged along the occlusal surface of the jaw pad body, and the lingual side and the buccal side of the jaw pad body are respectively provided with a plurality of lingual positioning parts and buccal positioning parts corresponding to the anterior and posterior tooth areas, the retaining device is a personalized mandibular transparent mouthpiece made according to the patient's mandible, the lingual side and the buccal side of the mandibular transparent mouthpiece are respectively provided with lingual retaining parts and buccal retaining parts at positions corresponding to the jaw pad body, the lingual positioning parts and the lingual retaining parts are connected in cooperation, and the buccal positioning parts and the buccal retaining parts are connected in cooperation, so that the jaw pad body can be retained and connected on the mandibular transparent mouthpiece. The cavity in the jaw pad body retained and connected on the personalized mandibular transparent mouthpiece is filled with semi-fluid, so that the shape of the occlusal surface of the jaw pad is not fixed, and the jaw position can be easily changed, and the patient can freely find a comfortable position according to the joint condition after wearing, which is convenient and practical.

The invention discloses an oral implant bone splitting chisel and a use method, the chisel comprises a holding part, a buffer area and a working head part which are distributed in a T-shaped structure; the holding part is a rod body and is provided with an anti-slip structure on the surface, and the axis is vertically and fixedly connected with the axis of the buffer area; the working head comprises a guide face and a guide blade, the splitting blade is of a wedge-shaped structure, a cutting edge is arc-shaped, arc-shaped transition faces are arranged on the two sides of the cutting edge, fillet transition is arranged at the tip end, the thickness of the cutting edge is gradually increased from the tip end to the root portion, and the holding portion and the buffer area are of an integral or detachable structure. The holding stability is improved through the T-shaped structure, bone tissue friction and damage are reduced through the design of the arc-shaped cutting edges and the round corners, the detachable working head can meet the requirements of different operation areas (a straight neck is used for an anterior tooth area, and a bent neck is used for a posterior tooth area), and multi-direction precise bone splitting is achieved; the use method is adaptive to different alveolar bone forms and bone cortex thicknesses, the operation steps are standard and controllable, the cleavage range is effectively controlled, the operation risk is reduced, the safety and convenience of the implant surgery are improved, and the device is suitable for various oral implant bone cleavage surgeries.

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.

The present application provides a dental model, a dental model set, a shell-shaped tooth appliance and a preparation method thereof. The dental model comprises a base. The geometry of the base is configured such that the average height from the bottom surface to the point on the sagittal plane where the highest cusp point of each tooth in the tooth model of the posterior tooth region on one side is projected is greater than the average height from the bottom surface to the point on the sagittal plane where the highest cusp point of each tooth in the tooth model of the posterior tooth region on the other side is projected. This configuration ensures that the thickness of the two shell-shaped tooth appliances obtained by pressing the two shell-shaped tooth appliances using the same film at the same time is substantially the same, thereby improving the preparation efficiency, reducing the production cost, and ensuring the correction effect of the shell-shaped tooth appliance.

The orthodontic arch wire comprises an anterior tooth section and a pair of posterior tooth sections connected to the two ends of the anterior tooth section, the cross section of the anterior tooth section is in a square shape, the cross section of each posterior tooth section is in a circular shape, and the cross sectional area of the anterior tooth section and the cross sectional area of each posterior tooth section are both smaller than the cross sectional area of a bracket groove; the anterior tooth section is divided into a plurality of sub-sections, each sub-section is linear, and the extension direction of each sub-section is the extension direction of the corresponding bracket groove. The self-ligating bracket has the effect of reducing the turning or jumping of the arch wire in the groove when the self-ligating bracket is used.

The invention discloses a structure for immediate implantation of an oral implant in a posterior tooth area, which comprises an implant connecting part, one end of which is recessed inwards to form a connecting area for fixing an abutment; the transition part is connected with the other end of the implant connecting part, and the transition part extends from the end face of the implant to the direction gradually deviating from the axis of the implant connecting part to form an expansion structure; at least two pyramid pieces are arranged at the tail end of the expansion structure, are rotationally and symmetrically distributed about the geometric center point of the tail end of the expansion structure, and are used for penetrating and being fixed in the bone fossa. Through the transition part below the connecting part of the implant and the plurality of pyramid pieces arranged at the bottom end, the implant structure can be inserted into a denture bone tissue for retention on the premise that a traditional bone drill is not used for preparing a hole in an interroot bone septum, so that the initial stability is effectively obtained.

The utility model relates to the field of orthodontic positioners, and provides an orthodontic positioner for assisting in mounting a buccal tube, so as to solve the problems that the bonding accuracy of an existing buccal tube is easily influenced by clinical experience of doctors, and the buccal tube is easily influenced by a visual field environment when being mounted in a rear tooth area, so that positioning deviation is caused. The dental pad comprises a jaw pad part which is matched with the outer contour of a dental crown and is used for being arranged on the dental crown in a covering manner; the clamping part is arranged at one end of the jaw pad part and located on the outer side of the tooth surface, a mounting groove is formed in the side, close to the tooth surface, of the clamping part and used for mounting a buccal tube, clamping arms are arranged at the two ends of the mounting groove, buckles matched with the clamping grooves in the two ends of the buccal tube are arranged on the two clamping arms respectively, and the buccal tube is clamped in the buckles. The clamping arm clamps the clamping groove of the buccal tube through the buckle so as to clamp the buccal tube.

The invention discloses a 3D printing correction device for correcting unilateral positive locking in a tooth replacement period. The 3D printing correction device comprises an upper jaw correction assembly and a lower jaw correction assembly, the maxillary orthodontic component comprises a 3D printing metal linked crown matched with the orthodontic side dentition, a resin base matched with the non-orthodontic side and the palate side, and a spiral expansion device connected with the 3D printing metal linked crown and the resin base, and the spiral expansion device is configured to apply an arch contraction force to the orthodontic side dentition; the lower jaw correction assembly comprises a lower jaw 3D printing metal support and a lower jaw resin retention layer, the lower jaw 3D printing metal support forms a metal belt ring structure on the non-positive locking side and extends on the positive locking side to form a long arm hook structure, and the outer surface of the metal belt ring structure and the surfaces of teeth on the non-positive locking side are coated with the lower jaw resin retention layer. According to the invention, digital design and 3D printing technology customization are utilized, the device is fixed in the mouth through an adhesive, and the device has the characteristics of good retention force, small size, low compliance to patients, and capability of effectively preventing extension of rear teeth and shortening the treatment period.

The utility model discloses a scanning and positioning assembly for oral implantation and a scanning and positioning device for edentulous jaw implantation. The scanning and positioning assembly comprises a scanning main body and at least one positioning piece, the scanning main body comprises a scanning part and an interface part which are sequentially arranged from top to bottom, and one end of the positioning piece is arranged on the periphery of the scanning part in a sleeving manner; by the adoption of the technology, the accuracy of intraoral scanning is remarkably improved, and a more reliable data basis is provided for follow-up oral cavity restoration work; besides, the connecting structure of the scanning main body and the positioning piece is simple, the positioning piece can be conveniently connected in the limited space in the oral cavity, especially the position of the rear alveolar tooth, the preparation time before scanning is greatly shortened, and the efficiency of scanning work is improved; and meanwhile, the operation difficulty and the probability of misoperation are reduced, and even an operator with relatively insufficient experience can smoothly complete the connection operation.

1. The name of the design product: dental surgery positioning marker (posterior teeth). 2. The use of the design product: used to assist doctors in performing dental surgery on patients. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.

A system for generating occlusal loading is provided, including a loading appliance and a controller. The loading appliance includes three load transmission elements and three actuators. The load transmission elements are adapted to be positioned between upper and lower anterior teeth of the patient and between upper and lower posterior teeth on the left and right sides of the patient's mouth, respectively. The load transmission elements are separated from each other. The actuators are coupled to the load transmission elements, respectively. The controller is configured to control the three actuators to actuate the three load transmission elements individually and sequentially, with a rest period between successive actions of the three load transmission elements, to transmit vibration energy from the three actuators to the patient's periodontal tissues of the anterior teeth, the left posterior teeth, and the right posterior teeth.

This invention discloses a shell-shaped dental instrument, comprising maxillary and mandibular shell-shaped bodies and a repositioning occlusal element assembly, which includes a first repositioning occlusal element and a second repositioning occlusal element. These repositioning occlusal elements are disposed on the same side, respectively connected to the buccal or lingual surfaces of the left and right sides of the posterior tooth region of the maxillary and mandibular shell-shaped bodies. The first repositioning occlusal element includes a first fixing portion, a first connecting portion, and a first locking portion, which together form a first receiving space; the second repositioning occlusal element includes a second fixing portion, a second connecting portion, and a second locking portion, which together form a second receiving space. During wear, the first locking portion is received within the second receiving space, and the second locking portion is received within the first receiving space, with their free ends abutting against each other in the sagittal direction. Furthermore, the first fixing portion, the second locking portion, the first locking portion, and the second fixing portion abut against each other sequentially in the gingival-maxillary direction. This invention also provides an orthodontic system.

1. The name of the design product: orthodontic guide (triangular guide). 2. The use of the design product: used for assisting in lowering the upper and lower anterior teeth in invisible correction, stabilizing the jaw position, and resisting the passive lowering of posterior teeth caused by the high surface of the invisible corrector (occlusion). 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model relates to a cold compress analgesic device for postoperative nursing of oral cavity, including gauze mask unit, a plurality of cold compress units, a plurality of analgesic units, first fixed unit and second fixed unit. Its advantage lies in, and the gauze mask unit is worn in the place of suffering with the gauze mask form to carry out analgesia and cold compress with analgesic unit, cold compress unit respectively with gauze mask unit is detachably connected, and utilizes first fixed unit and second fixed unit, not only can liberate patient's both hands, and can be closely combined with the place of suffering, and the use is flexible, convenient, and the cold compress, analgesic effect is good, and the gauze mask unit is set up in the region, can carry out cold compress and analgesia to maxillary region, mandibular anterior tooth area, mandibular posterior tooth area respectively, improves patient's comfort.

The utility model discloses a shell-shaped dental instrument which comprises an upper jaw shell-shaped body, a lower jaw shell-shaped body and a repositioning jaw element assembly, and the repositioning jaw element assembly comprises a first repositioning jaw element and a second repositioning jaw element. And the repositioning jaw elements are arranged on the same side and are respectively connected to cheek side surfaces or lingual side surfaces on the left and right sides of the back tooth areas of the upper jaw shell-shaped body and the lower jaw shell-shaped body. The first repositioning jaw element comprises a first fixing part, a first connecting part and a first locking part which are enclosed to form a first accommodating space; the second repositioning jaw element comprises a second fixing part, a second connecting part and a second locking part which are enclosed to form a second accommodating space; during wearing, the first locking part is contained in the second containing space, the second locking part is contained in the first containing space, the free ends of the first locking part and the second locking part abut against each other in the sagittal direction, and the first fixing part, the second locking part, the first locking part and the second fixing part abut against each other in the gingival jaw direction in sequence. The utility model further provides a correction system.

The invention discloses a bracket-free invisible appliance with a lower jaw leading-forward function. The bracket-free invisible appliance comprises an upper jaw appliance body and a lower jaw appliance body, convex bubbles are arranged on the cheek side surfaces of the rear tooth areas of the upper jaw appliance body and the lower jaw appliance body, the convex bubbles are wide in lower parts and narrow in upper parts, the cross sections of the convex bubbles are gradually narrowed along the jaw aligning direction, and concave step reinforcing ribs are arranged on the cheek side surfaces of the convex bubbles; the convex bubbles are arc-shaped, convex upwards and concave downwards, and the radian is gradually increased in the vertical direction from bottom to top; the slope side faces of the upper jaw appliance body and the lower jaw appliance body are force application faces, when the upper jaw and the lower jaw are meshed together, the mesial slope side face of the convex bubble of the upper jaw appliance makes contact with the mesial slope side face of the convex bubble of the lower jaw appliance to serve as a contact face, and the contact face is an irregular curved face. Other areas of the bottom surfaces of the convex bubbles of the upper jaw appliance body and the lower jaw appliance body are in smooth transition connection with tooth surfaces of corresponding upper and lower jaw rear teeth and are provided with connecting blocks.