40 results about "First molar tooth" 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 invention discloses a lower jaw sagittal splitting osteotomy positioning guide plate. Comprising a lower supporting type positioning guide plate, a middle occlusion positioning plate and an upper supporting type positioning guide plate which are sequentially connected through connecting rods, wherein the lower supporting type positioning guide plate is manufactured according to the outer side form of a lower jaw body part; the middle occlusion positioning plate is manufactured according to first molars and first premolars of a patient; the upper supporting type positioning guide plate is manufactured according to the outer side form of a lower jaw ramus; the upper supporting type positioning guide plate extends towards the inner side of the mandibular branch to form a mandibular branch inner side horizontal osteotomy guide rod set according to the position of a small tongue of the mandibular branch, and the lower end of the lower supporting type positioning guide plate is provided with a lower edge supporting type positioning guide plate manufactured according to the shape of the lower edge of the mandibular branch. The lower supporting type positioning guide plate is provided with a vertical osteotomy guide groove which is designed and manufactured according to an operation. According to the guide plate, the osteotomy and reduction process in the sagittal split operation of the lower jaw is more accurate through accurate design and positioning, inferior alveolar nerves can be effectively protected, the postoperative stability is improved, compared with the prior art, the safety, accuracy and efficiency of the operation are remarkably improved, risks in the operation are reduced, and the operation cost is reduced. The important clinical application value is realized.

A one-piece removable therapeutic dental orthotic to be worn on a wearer's lower dentition. The orthotic has occlusally bulging fulcrum regions positioned over a wearer's left and right first molar and second bicuspid, so that the orthotic initially contacts only a pair of fulcrum teeth of the wearer's upper dentition during the wearer's jaw closure movement, without any of the wearer's teeth touching each other. The initial contact locations serve as a fulcrum, and clearance is provided between the wearer's upper dentition and clearance regions of the orthotic on mesial and distal sides of the fulcrum regions, allowing the wearer's jaw to pivot about the fulcrum while the upper dentition remains in contact with the fulcrum regions and touches no other part of the orthotic.

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 utility model discloses a mandible isolation tongue block structure, which comprises two belt rings respectively sleeved on first molars on two sides of a mandible; the connecting rod is arranged on the tongue side, the two ends of the connecting rod are connected with the two bands respectively, and the connecting rod has a radian bent in the arrangement direction of the teeth of the lower jaw; the tongue block is arranged on the tongue side, and the tongue block is vertically arranged on the connecting rod and used for isolating tongue muscles. The mandible isolation tongue blocking structure designed by the utility model is an appliance capable of relieving the thrust of tongue muscles to the mandible. The tongue blocking structure for isolating the lower jaw is convenient and fast to use, can effectively eliminate the cause of the reverse jaw problem caused by the low tongue position, is very suitable for being used by children with poor habits of the low tongue position, has high clinical value, and is suitable for clinical popularization and use.

The utility model relates to the field of pendulum appliance, disclose a kind of exempt from premolar disassembly pendulum appliance, including base plate, base plate is connected with pendulum spring and front section steel wire, pendulum spring and first molar are connected, further include bracket, bracket is set in premolar palatine side, and front section steel wire is detachably connected in bracket.Including first steel wire and second steel wire, bracket includes first bracket and second bracket, first bracket and second bracket are respectively set in first premolar palatine side and second premolar palatine side, and first steel wire and second steel wire are respectively detachably connected in first bracket and second bracket.In order to realize the modularization of the retention unit and the force unit of pendulum appliance, separable connection.

The present invention relates to an auxiliary anterior teeth torque control device, which comprises a traction hook, an anterior teeth bracket, a spring seat and a traction seat; each anterior tooth is fixed with an anterior teeth bracket, and adjacent anterior teeth brackets are connected by a small coil, the spring seat and the traction seat are respectively fixed on the canine and the second premolar, the spring seat and the traction seat are connected by a square wire, the first molar and the canine are each provided with a traction hook, and the two traction hooks are connected by a rubber chain, the auxiliary anterior teeth torque control device of the present invention has a small force attenuation and a continuous force.

The utility model relates to a device for fixing gauze in an oral cavity, which comprises two fixing clamps respectively clamped with first molars on two sides, the two fixing clamps are connected through a long-strip-shaped connecting rod, the connecting rod is positioned above a tongue, a connecting column is arranged at the midpoint of the connecting rod, and the connecting column is connected with the first molars. The side wall of the connecting column is provided with a first supporting rod extending towards the cheek side and two second supporting rods which obliquely extend towards the two sides of the throat and are symmetrically arranged, and the end of the first supporting rod and the end of the second supporting rod are each provided with a clamp used for clamping gauze. The utility model has the characteristics that the gauze can be fixedly supported, the gauze is separated from the throat and the tongue root of a patient, the direct contact between the gauze and the throat and the tongue root of the patient is avoided, the possibility that the patient feels nausea is reduced, the comfort of the patient is ensured, and the like.

The invention relates to the technical field of orthodontic tooth movement in animal experiments, in particular to a mouse orthodontic tooth movement model and a construction method thereof, and the mouse orthodontic tooth movement model comprises a traction assembly and an anchorage nail; the laboratory mouse is provided with a maxillary bone, second molar teeth growing on the maxillary bone and incisors growing on the maxillary bone, first molar teeth of the laboratory mouse are extracted, and an avoiding space is formed in front of the second molar teeth after the first molar teeth are extracted; the anchorage nail is connected to the maxillary bone and is positioned between the second molar and the incisors; the anchorage nail is fixed after being implanted into the maxillary bone, so that the position change of the traction assembly caused by connecting the traction assembly to the incisors can be avoided; the traction assembly is arranged between the second molar and the anchorage nail, the front end of the traction assembly is connected with the anchorage nail, the rear end of the traction assembly can penetrate through the avoiding space and is connected with the second molar, the second molar is used as an experimental moving tooth, and the movement rule of human clinical orthodontic teeth can be better simulated.

The utility model provides an orthodontic-implant combined vertical inclined molar device, which relates to the technical field of orthodontic treatment and comprises a first molar orthodontic-implant complex arranged at the position of a first molar and a molar band-grooved tube integrated structure arranged on a second molar, the first molar orthodontic-implant complex comprises an implant tooth temporary crown, a first orthodontic groove tube, a fixing screw, an implant abutment and an implant, a first groove is formed in the top of the temporary crown, a second groove is formed in the bottom of the temporary crown, the fixing screw extends into the first groove, and the implant abutment is connected with the first orthodontic groove tube. The top of the implant abutment extends into the second groove, and the bottom of the fixing screw is connected with the top of the implant abutment; according to the utility model, the clinical treatment time can be shortened, the treatment cost of a patient is reduced, the comfort of the patient is improved, the workload of a doctor is reduced, the surgical risk of anchorage nail implantation is reduced, and the requirements of healthy, comfortable and efficient treatment are met.

The utility model discloses a kind of implant device suitable for mouse mandibular first molar, it is related to biomedical engineering field, provide a kind of implant device suitable for mouse mandibular first molar, including handle and the implant of being connected with handle, the implant includes the push rod being connected with handle and the implant nail being connected with push rod, connecting rod is equipped between push rod and implant nail, facilitating breaking down. The utility model is easy to operate, without jaw bone preparation hole, after removing 4 weeks old mouse mandibular first molar, manually implanting implant in distal root alveolar crypt, it can break under suitable torque, reduce operation time and mouse postoperative recovery time, improve experimental efficiency and success rate.

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 discloses a construction method of an SD (Sprague Dawley) rat animal model for assisting maxillary bone bony expansion by using planting nails with holes, and relates to the field of experimental zoology, and the construction method comprises the following steps: (1) anesthetizing a rat and fixing the rat; (2) implanting planting nails with holes into the maxillary bone at 1 mm mucous membranes before first molar teeth of the maxillary on the two sides of the rat, and enabling the holes in the planting nails on the two sides to be opposite to each other; (3) adjusting the expansion force of the expansion spring to 100g, and clamping the expansion spring into the holes of the planting nails on the two sides for expansion; and (4) taking down the expansion spring on the fifth day, re-adjusting the expansion force of the expansion spring to 100g, clamping the expansion spring into the holes of the planting nails on the two sides for expansion, taking down the expansion spring and the planting nails on the tenth day, and finishing expansion, so as to obtain the SD rat animal model of maxilla bony expansion. The animal model constructed by the invention not only can expand the middle palate seam, but also can expand the front palate seam, and the model can play an important role in the aspects of researching the osteogenesis mechanism and influence factors of the middle palate seam during the bony expansion period of the maxillary bone, exploring the treatment means of the bony expansion recurrence of the maxillary bone and the like.

The present invention relates to a device for distally moving a posterior dentition, comprising a coupling body (1), an anti-lock component (2) and a vertical control device, wherein the coupling body (1) comprises an annular body (11) and a buccal connecting rod (12), wherein the annular body (11) covers the first molar and the canine respectively and is connected via the buccal connecting rod (12), wherein the anti-lock component (2) is arranged on the buccal side and connected to the coupling body (1), and wherein the vertical control device is connected to the coupling body (1). Compared with the prior art, the device of the present invention does not require bonding and can prevent tooth eversion during the process of distally moving a group of teeth.

The invention relates to the technical field of oral cavity correction devices, and provides a personalized lingual pushing molar distalization device which comprises an auxiliary appliance and a pushing mechanism, the auxiliary appliance comprises an arch wire and a plurality of lingual brackets, the plurality of lingual brackets are respectively adhered to a tooth body of a dentition of a patient, and the arch wire is embedded in a groove of each lingual bracket; the pushing mechanism comprises a connecting rod, a supporting rod and a stress application spring; the connecting rod is connected with a lingual bracket corresponding to a first molar, a limiting pipe is arranged at one end, far away from the lingual bracket, of the connecting rod, the supporting rod penetrates through the limiting pipe, a first positioning hole is formed in the near-middle end of the supporting rod in a bent mode, a first limiting hole is formed in the far-middle end of the supporting rod, and an anchorage nail penetrates through the first positioning hole and is implanted into a gum. A bolt is inserted into the first limiting hole; the stress application spring is compressed and sleeved on the supporting rod. The device has the effect of facilitating pushing of the first molar.

The utility model discloses an orthodontic device for pushing molars to move distally, which comprises a first molars, a first premolars and a lower tassel tongue rod, a first casting belt ring and a second casting belt ring are arranged on the lower tassel tongue rod, and the first casting belt ring is used for being fixed on the first premolars; a cheek-lingual side sliding rod is arranged at the end of the lower beard tongue rod, a transverse stabilizing component is arranged on the cheek-lingual side sliding rod, a push spring is installed on the side, close to the first premolars, of the cheek-lingual side sliding rod, the first premolars are pushed to the distal middle through the push spring and the transverse stabilizing component, and the first premolars are pushed to the distal middle through the transverse stabilizing component. A tooth gap is reserved between the first molars and the first premolars. By adopting the combination of a plurality of structures such as the buccal-lingual sliding rod, the transverse stabilizing component, the push spring, the first casting belt ring and the second casting belt ring, the molar is pushed to the distal position under the action of the transverse stabilizing component and the push spring, and the stability of the whole device in the using process is improved by the structure.

This application discloses a novel device for simultaneously expanding and depressing the mandibular anterior teeth to relieve posterior tooth occlusion, relating to the field of orthodontic technology. It includes a maxillary cast-crown spiral expander, a metal mesh split-plane guide, and traction clips. The maxillary cast-crown spiral expander comprises a cast crown and a spiral expander. The cast crown is used to secure the first premolar, second premolar, and first molar, and the spiral expander is fixedly connected to the cast crown. The metal mesh split-plane guide conforms to the anterior part of the maxillary palate and is fixedly connected to the cast crown. The traction clips are located on the buccal side of the cast crown and are cross-pulled by elastic bands with traction clips located on the lingual side of the mandibular posterior teeth. This application simultaneously expands the arch to solve the problems of maxillary width and vertical misalignment, and utilizes the maxillary cast-crown spiral expander as a reinforcing anchorage to prevent elongation and rotation of the maxillary anchorage teeth. It matches the width of the maxilla and mandible while minimizing anchorage loss, thus relieving posterior tooth occlusion.

The application discloses a kind of upper and lower jaw alveolar arch coordination analysis method based on oral cone beam CT, specific steps are as follows: collecting patient cone beam examination data, it is exported as DICOM format, three-dimensional reconstruction is carried out using software;Head position calibration is carried out in software, and three-dimensional reference plane is established;Four quadrant of dental arch is positioned and marked, and four quadrant first molar impedance center point is positioned;Determine alveolar arch measurement plane;Determine four quadrant alveolar arch width measurement mark point;Mark point is projected to the same coronal reference plane, and is connected to form upper and lower jaw alveolar arch width coordination angle respectively, and the angle of upper and lower jaw alveolar arch width coordination angle is measured respectively;According to the angle of upper and lower jaw alveolar arch width coordination angle, whether the upper and lower jaw alveolar arch coordination is judged.The angle of measured double jaw alveolar arch width coordination angle can more accurately reflect the position relationship of upper and lower jaw first molar alveolar arch in horizontal direction;It has guiding significance to judge whether left and right alveolar arch is symmetrical.

The present invention provides a two-dimensional maxillary molar movement device, which relates to the field of orthodontic instruments. The two-dimensional maxillary molar movement device includes left and right retention components and a force application component. The left and right retention components are respectively arranged on the left and right sides of the median palatal suture, and the force application component is connected to the left and right retention components. Each retention component includes a metal crown sleeved on the first molar and a retention plate with a transverse groove in the middle. The metal crown and the retention plate are arranged on the same side of the median palatal suture and are connected by a wire. A mini-implant sleeve is connected to the buccal side of the metal crown corresponding to the maxillary zygomaticoalveolar crest. Force application component mounting holes are respectively arranged at the sagittal ends of the retention plate. In the present invention, the retention component can be closely attached to the palatal mucosa to the greatest extent, and the mini-implant can be implanted into the bone to the greatest extent, reducing the risk of failure during the force application process of the mini-implant. Moreover, during the orthodontic treatment, sufficient transverse width change of the maxilla can be achieved without removing the mini-implant.

The utility model discloses a straightener for strengthening lingual inclination molar, which comprises a double-arm elastic arm, a plastic base, a hyperbolic labial arch and an arrow snap ring, the labial arch of the hyperbolic labial arch is welded on the snap ring cheek side of the arrow snap ring, the hyperbolic labial arch of the hyperbolic labial arch crosses the tooth gap of the premolar, the arrow snap ring is positioned on the first molar, and the double-arm elastic arm is welded on the snap ring cheek side of the arrow snap ring. The plastic base is embedded in a tooth gap of a rear tooth, the whole of two arms of the double-arm elastic arm is of a V-shaped structure, one end of each arm is of an integrally-formed structure, the other end of each arm is of a hook-shaped structure, and the middle of each arm is twisted into a spiral structure. By utilizing the characteristic of high elasticity of Australian silk, a double-arm elastic arm structure is manufactured, and the double-arm elastic arm structure is soft and durable in strength, needs a small space, is more comfortable, is simple in structure and is convenient for a doctor to operate.

The application relates to the technical field of oral appliances, in particular to a maxillary expansion post-retainer for a maxillary expansion maintenance period, which comprises a first permanent molar band, a palatal arch, a resin base, tooth retraction traction hooks, a lingual traction buckle, a transverse palatal bar, a buccal tube and a palatal bead. The palatal arch corresponds to the shape of the maxillary palate and provides rigid support for the first molar width by fitting the palate. The transverse palatal bar is used to maintain the first molar width and control the height of the first molar through the lingual muscle. The resin base is a pair of resin blocks with the same shape and size, and the tooth retraction traction hooks are located in the resin base and are two on the left and right sides. The clinical application range of the retainer is wide, and the retainer is suitable for patients who are treated by expansion after the transverse development of the maxillary of teenagers is insufficient. The retainer can achieve good expansion effect maintenance and correct the tooth compensation effect generated in the expansion process for patients in the mixed dentition period or the early permanent dentition period after the maxillary expansion is completed.

The utility model relates to the technical field of oral medicine, and particularly discloses a maxillary molar pushing distal appliance which comprises a U-shaped palatal bar, planting nails and an elastic traction piece, orthodontic bands used for being tightly sleeved and fixed on a first molar are fixedly connected to the two ends of the U-shaped palatal bar, the two sides of the middle of the U-shaped palatal bar are respectively wound by a circle to form traction rings, and the two sides of the middle of the U-shaped palatal bar are fixedly connected with the planting nails. The two implanting nails are implanted and fixed to the two sides of the upper jaw respectively and located between the first molar and the second molar, one end of the elastic traction piece is connected with the implanting nails, and the other end of the elastic traction piece is connected with the traction ring. The appliance for pushing the maxillary molar towards the far middle is stable in installation and not easy to fall off, and meanwhile, the position of a stress application point can be adjusted as required in the installation process, so that the traction correction effect is improved.

The invention relates to the technical field of organoid culture, and provides a mouse tooth embryo organoid culture method which comprises the following steps: step 1, taking a first molar tooth embryo of the lower jaw of an SD (Sprague Dawley) rat of which the embryo is 18.5 days; 2, dissociating the tooth embryo tissue into single cells by adopting a mechanical shearing and compound enzyme digestion method, wherein the compound enzyme is prepared by mixing collagenase I, neutral protease II and deoxyribonuclease I according to a mass ratio of 2: 2: 1; step 3, embedding the single-cell suspension in matrigel at a concentration of 150000 cells / 50 [mu] L; and 4, adding a DMEM / F-12 culture medium containing growth factors, and culturing for 7 days under the conditions of 37 DEG C and 5% CO2. The cultured organoid forms a layered structure similar to a clock-shaped tooth embryo on the seventh day, contains epithelial cells (CK14 positive) and mesenchymal cells (Vimentin positive), can express an enameblast marker AMELX, an odontoblast marker DSPP and a tooth development key factor TGF-beta, and is highly consistent with the in-vivo tooth embryo development characteristic.

The utility model discloses a silica gel tooth appliance, including occlusion, labial and buccal stop and tongue stop, the whole occlusion is U shape setting, including corresponding first occlusion of anterior tooth area tooth setting, corresponding second occlusion of premolar setting and corresponding third occlusion of first molar setting, the left and right sides of first occlusion are connected second occlusion and third occlusion in proper order respectively, and first occlusion and second occlusion and third occlusion all include corresponding maxillary bearing surface of maxillary tooth and corresponding mandibular bearing surface of mandibular tooth respectively, when wearing, the maxillary bearing surface of first occlusion exerts a pressure on the tooth to be pressed down, and the mandibular bearing surface of first occlusion and mandibular anterior tooth area tooth form elongation space, the maxillary bearing surface and mandibular bearing surface of second occlusion contact with maxillary premolar and mandibular premolar respectively, and the maxillary bearing surface of third occlusion and maxillary first molar form eruption space.

The invention discloses a rat molar transplantation experimental model for autologous tooth transplantation research, a construction method and application, and belongs to the technical field of oral basic medical experiments. The method comprises the following specific steps that firstly, a to-be-processed transplanted rat model in which a third molar is inserted into a second molar alveolar socket in advance is obtained, and the distal root, the mesial cheek root and the palate root of the third molar in the model are correspondingly inserted into the mesial palate root, the distal cheek and the mesial cheek root alveolar socket of the second molar; then carrying out acid etching treatment on the enamel of the first molar and the enamel of the third molar by adopting an acid etching agent, and coating an adhesive on the surface of the enamel; then placing flowing resin on the tooth surface subjected to acid etching, embedding a ligature wire into the flowing resin, and carrying out illumination curing; and finally, performing infection prevention management to obtain the rat molar transplantation experiment model. The construction method has the characteristics of short experimental period and high operation repeatability, and is suitable for subsequent periodontal membrane healing mechanism research, dental pulp revascularization process observation and screening evaluation of dental biological materials.

The utility model discloses a buccal tube assembly suitable for a bony expansion device, and relates to the technical field of orthodontic treatment, the buccal tube assembly comprises two traction structures and two first buccal tubes used for being connected to an expansion structure, each traction structure comprises a second buccal tube and a driving rod arranged on the second buccal tube in a penetrating mode, one end of the driving rod is bent, the other end of the driving rod is provided with a traction hook, the first buccal tube is provided with a first abutting surface, and the second buccal tube is provided with a second abutting surface. The expansion structure drives the two first buccal tubes to slide in the direction away from each other until the two first abutting surfaces abut against the first molar, the first molar can have the moving tendency only by abutting the first abutting surfaces against the first molar, and therefore the correction effect is achieved. The first abutting face is suitable for first molars of different shapes, the orthodontic belt ring retainer does not need to be customized, correction of the first molars can be achieved, and cost is saved.

The present invention discloses a lingual device for orthodontic retention and periodontal fixation splint and a manufacturing method thereof; the maxillary part includes a first retaining part and a pair of first guiding parts, the first retaining part is used to fit the lingual side of the crown of the maxillary anterior teeth and the maxillary canines and the maxillary first molars on both sides of the maxillary anterior teeth, one end of each first guiding part is connected to the first molar of the maxillary on one side of the first retaining part, and the other end extends along the crown of the maxillary first molar to the occlusal surface of the maxillary first molar; the mandibular part includes a second retaining part and a pair of second guiding parts, the second retaining part is used to fit the lingual side of the crown of the mandibular anterior teeth and the mandibular canines and the mandibular first molars on both sides of the mandibular anterior teeth, one end of each second guiding part is connected to the first molar of the mandibular on one side of the second retaining part, and the other end extends along the crown of the mandibular first molar to the occlusal surface of the mandibular first molar. The lingual device of this scheme is convenient for oral hygiene maintenance and clinical precise positioning and bonding.

The utility model relates to the technical field of dentistry. The tooth socket with the expansion and front traction functions comprises a tooth socket base body, and the tooth socket base body comprises a first molar coating part, a first transition connecting part, a middle incisor coating part, a second transition connecting part and a second molar coating part which are connected in sequence; the first transition connecting part and the second transition connecting part are provided with hollow structures; the first molar coating part and the second molar coating part are connected through an expansion arch structure, and the middle part of the expansion arch structure is a bending structure which is arranged in a roundabout manner; traction connecting pieces for front traction are fixed on the lip side of the first molar coating part and the lip side of the second molar coating part, and the traction connecting pieces are limiting buckles or tubular structures. According to the utility model, the structure of the tooth socket is optimized, the arch expansion function is realized through the arch expansion structure, and the front traction function is realized through the traction connecting piece, so that the arch expansion function and the front traction function are integrated on the tooth socket.

The invention discloses an animal model construction method for wearing an invisible appliance in the mouth of a mouse, and belongs to the field of oral cavity models. The method for constructing the animal model with the mouse wearing the invisible orthodontic appliance in the mouth comprises the steps that after the invisible orthodontic appliance is manufactured, the cheek-tongue side, opposite to the adjacent gap between a first molar and a second molar, of the invisible orthodontic appliance is punched, the incisor part on the invisible orthodontic appliance is ground away, and only the root is reserved; and during wearing, a ligature wire penetrates through a pre-hole part on the cheek-tongue side of the invisible appliance, and ligature is carried out. On the premise that the surface structure and color of teeth are not affected, clinical effective experimental data can be obtained, the invisible orthodontic appliance adopts rat incisor partial windowing, and the problem that the invisible orthodontic appliance cannot be worn after rat incisor growth is solved.

In artificial teeth belonging to posterior teeth parts, buccal convexity on an upper jaw side is suitable in occlusion; in a centric occlusal position, lingual cusps on the upper jaw side are fit in central fossae on a lower jaw side; W2 / W1 is 0.9 to 1.22 where W1 is a width of a lingual cusp of a first molar tooth on the upper jaw side, and W2 is a width of a pit of a first molar tooth on the lower jaw side one of the artificial teeth in a buccolingual direction; and Sk / Sj is 0.85 to 0.95 where, when the first molar tooth on the lower jaw side is viewed from an occlusal surface, Sj is an area surrounded by ridges of buccal and lingual edges that pass buccal and lingual cusp tips, and mesial and distal marginal ridges, and Sk is an area surrounded by an edge of the pit.