27 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 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 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 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 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 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 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.

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.

The application belongs to the technical field of oral medicine, and specifically relates to a maxillary fixed expansion appliance, which comprises a spiral expander, a plastic base, a connecting rod, a retaining device and a dental retraction hook. The spiral expander is located in the center of the appliance, the plastic base is divided into two parts in the center and covers the hard palate of the maxilla, the retaining device is composed of a continuous band ring casted by the lower molar or premolar and a single band ring casted by the first molar, and the dental retraction hook is located in the plastic base and used for retracting and lowering the maxillary first molar with buccal inclination after expansion. The appliance has a wide clinical application range and is suitable for patients with mild to moderate transverse maxillary hypoplasia and maxillary posterior tooth buccal inclination compensation. The appliance can achieve good skeletal expansion effect for patients in the mixed dentition period or early permanent dentition period and reduce excessive tooth buccal inclination and movement in the maxillary rapid expansion patients.

The application discloses a kind of upper front teeth depressor and correction method, including micro-implant anchorage nail, main bow, auxiliary bow and bracket;Bracket is fixed on the tooth crown of the upper front teeth needing adjustment, main bow transversely penetrates bracket and connects several brackets located on different tooth crowns, the micro-implant anchorage nail is one in left and right respectively, and is arranged between the buccal side of left and right two sides second premolar and first molar of maxilla, the two ends of auxiliary bow are connected with micro-implant anchorage nail respectively, and form the pressure lowering force to upper front teeth;Auxiliary bow and implant nail are combined, the force of auxiliary bow directly acts on upper front teeth, and reaction force is cancelled on implant nail, without adverse effect on dentition;Without affecting posterior teeth, upper front teeth are absolutely pressed down.

The utility model discloses a training model for tooth extraction surface scratch operation, a training model for tooth extraction surface scratch operation, including the hinged seat of the rotation of certain angle, detachably install a pair of model base of simulating alveolar bone on the front end of hinged seat up and down symmetry, be equipped with tooth extraction nest in the position of corresponding human tooth on model base, be equipped with gum model of simulating gum on the outer package of model base, be equipped with the installation groove of corresponding communication tooth extraction nest bottom end on the outside surface of model base of corresponding human maxillary first molar, detachably install maxillary sinus bottom mucous membrane model spare in installation groove, and be equipped with granulation model spare in the bottom bonding of tooth extraction nest. The utility model is favorable to the direct view simulation demonstration periodontal damage situation, is favorable to the student and promptly discovers and corrects scratch operation, can improve the training effect of scratch operation.

A mouth guard that is formed by molding into a shape that corresponds individual teeth of an maxillary dentition A or a mandibular dentition of a user, and is attached to the maxillary dentition A or the mandibular dentition of the user, the mouth guard having a thickness of 0.1 to 5.0 mm. A portion of the mouth guard that is positioned at a valley portion of at least one of a first molar D and a second molar E of the maxillary dentition A or the mandibular dentition is, when the mouth guard is attached to the maxillary dentition A or the mandibular dentition of the user, formed into a shape that forms a gap between the portion and the valley portion of at least one of the first molar D and the second molar E.

The utility model relates to the technical field of orthodontics, in particular to a novel tooth biological regulator which comprises two jaw pads, an upper jaw rubber support and a lower jaw rubber support, the upper jaw rubber support and the lower jaw rubber support are fixedly arranged on the upper portions and the lower portions of the jaw pads respectively, and arrowhead clamps matched with first molars in the upper row are arranged on the outer sides of the jaw pads. The front portions of the two upper jaw rubber supports are fixedly connected through a hyperbolic upper labial arch, the front portions of the two upper jaw rubber supports are fixedly connected through a hyperbolic lower labial arch, and a mushroom spring matched with upper-row incisors is arranged on the rear side of the hyperbolic upper labial arch. The two ends of the mushroom spring extend into the two upper jaw rubber supports respectively and are fixedly connected with the two upper jaw rubber supports, and the upper portions of the rear portions of the two upper jaw rubber supports are fixedly connected through an Omega hook.

The application belongs to the technical field of dental instruments, and particularly relates to a molar anchorage conversion appliance, which comprises a first connecting crown, a second connecting crown, a connecting rod, a third connecting crown, a molar distal movement assembly and a lingual rod; the first connecting crown is installed on the first bicuspid tooth, the second bicuspid tooth and the first molar on the left side of the upper jaw or the lower jaw; the second connecting crown is installed on the first bicuspid tooth, the second bicuspid tooth and the first molar on the right side of the upper jaw or the lower jaw; the first connecting crown and the second connecting crown are connected through the connecting rod; the third connecting crown is installed on the second molar and the third molar; the molar distal movement assembly comprises a first base, a second base and a telescopic adjusting piece installed between the first base and the second base. The application can realize conversion of moving teeth to anchorage teeth, maximally increase the number of anchorage teeth, and orthodontically correct class Ⅱ and class Ⅲ functional malocclusions of adults without tooth extraction, enamel removal and anchorage nail striking.

The invention provides a rat periodontitis model and a construction method and application thereof, on the basis of ligating a tooth neck of a first molar of an SD (Sprague Dawley) rat by a traditional silk thread, light-cured composite resin is bonded in the occlusion direction of the silk thread to manufacture an appearance high point, the silk thread is fixed, a tartar is simulated, and an occlusion high point is formed; meanwhile, the gingival sulcus of the first molar of the upper jaw is cooperatively inoculated with human periodontitis pathogenic bacteria, the implementation method is simple, the repeatability is good, the stability is high, the silk thread loosening rate is reduced to 3.13% when modeling is carried out for 28 days, the loosening rate is greatly reduced compared with 34.38% of a traditional silk thread ligation model, subsequent experiment steps are simplified, lasting gingivitis cell infiltration is caused, and the method is suitable for popularization and application. The number of inflammatory cells is 63.27 + / -7.07% when modeling is carried out for 28 days, experimental periodontitis models of different degrees can be constructed within 2-4 weeks, compared with a traditional model, forming is faster, the model is closer to periodontitis clinical characteristics, and a model basis is provided for researching intervention strategies of different stages.

The invention relates to the technical field of oral instruments, in particular to a maxillary expansion post-retainer for maxillary expansion maintenance period, which comprises a first permanent molar band, a palatal arch, a resin base, a dental retraction traction hook, a lingual traction buckle, a transverse palatal bar, a buccal tube and a palatal bead. The palatal arch corresponds to the upper jaw palate in shape and fits the palate to provide rigid support to maintain the first molar width. The transverse palatal bar is used for maintaining the width of the first molar and controlling the height of the first molar through the lingual muscle. The resin base plate is a pair of resin square blocks with the same shape and size, the two tooth retraction traction hooks are arranged on the left side and the right side of the resin base plate respectively and located in the resin base plate, and the retainer is wide in clinical application range and suitable for patients who are subjected to arch expansion treatment after lateral maxillary development insufficiency of teenagers. According to the invention, a good arch expansion effect can be maintained for patients in a replacement dentition stage or an early permanent dentition stage after maxillary arch expansion is completed, and meanwhile, a dental compensation effect generated in an arch expansion process is corrected.