16 results about "First molar tooth" patented technology

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 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.

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 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 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 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.

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.