69 results about "Premolar 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 relates to the technical field of oral medical instruments, and particularly provides a customized joint jaw position appliance and a manufacturing method thereof.The customized joint jaw position appliance comprises an appliance body, the appliance body comprises an upper jaw tooth occlusion sleeve and a lower jaw tooth occlusion sleeve, and a first occlusal surface of the upper jaw tooth occlusion sleeve is effectively occluded with a second occlusal surface of the lower jaw tooth occlusion sleeve; the guide inclined surface is arranged on the inner side of the anterior tooth area of the appliance body; the upper jaw blocking body and the lower jaw blocking body are respectively arranged on an occlusal surface, a cheek side surface or a lingual side surface of a premolar region on two sides of the upper jaw tooth occlusal sleeve and the lower jaw tooth occlusal sleeve; the upper jaw blocking table and the lower jaw blocking table are respectively arranged on the occlusal surface, the cheek side surface or the tongue side surface of the molar areas on the two sides of the upper jaw tooth occlusal sleeve and the lower jaw tooth occlusal sleeve, and are integrally connected with the appliance body to form a first occlusal surface and a second occlusal surface. According to the customized joint jaw position appliance, the disc-condylar relationship can be more accurately recovered according to the displacement condition of the joint disc of a patient through double-jaw coordination and multi-region blocking design, the treatment period is shortened, and the prognosis stability is improved by matching with a chewing function.

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.

The utility model relates to the technical field of teeth, in particular to an appliance suitable for maxillary anterior teeth. Comprising an embedded tooth, a mesio-middle adjacent tooth and two casting belt rings, the embedded tooth is located on the inner side of the bottom of the mesio-middle adjacent tooth, the casting belt rings are located at the two ends of one side of the embedded tooth, a Nand palate support is welded between the two casting belt rings, double-tube buccal tubes are welded to the ends, away from each other, of the two casting belt rings, and a loop is welded to the bottom of each double-tube buccal tube. And a bending piece is fixed on the inner side of the Nand palate support. According to the utility model, maxillary anterior teeth which are impacted on the lip side and are closer to adjacent teeth can be drawn during use; meanwhile, the positioning single-curved labial arch is adopted to firstly draw the embedded tooth towards the labial side, direct traction and force application are carried out, the oral mucosa is prevented from being pressed, the positioning single-curved labial arch is connected with the single-curved labial arch in a welded mode through a loop, the loop part is located at the position of the maxillary premolar, and after the embedded tooth is basically exposed out of the labial mucosa, the embedded tooth can be continuously drawn backwards and downwards until the embedded tooth is basically drawn in place.

The present disclosure is directed to a dental appliance. The dental appliance includes a first band adapted for mounting about a first tooth, such as a second molar, the first band having a mesial hook facing toward a root of the first tooth. A second band is included, the second band adapted for mounting about a second tooth, such as a premolar, wherein the second band has a distal hook facing toward a crown of the second tooth. A spring is secured to, and extends between, the distal and mesial hooks. The spring may be a nickel titanium coil spring and have a length of about 13 mm. Other embodiments include a supportive rigid bar, a bi-lateral arrangement, and a method of applying the dental appliance.

The invention discloses an occlusal stable temporomandibular joint disorder therapeutic jaw plate and a preparation method thereof, and belongs to the technical field of dental restoration. The preparation method comprises the following steps: acquiring the upper and lower jaw position relation of a joint hinge shaft of a patient, and transferring to a jaw frame; the method comprises the following steps: importing a jaw frame and an occlusion relationship into computer software, designing an occlusion plate worn on an upper jaw dentition, and performing parameter adjustment: adjusting the occlusion height until a rear tooth tip is separated from contact by 1-3mm, only one buccal tooth tip of each of two premolars in the left lower and right lower back tooth areas and the first and second molars is in contact with the biteplate, and canine teeth and lower anterior teeth are in contact with the biteplate; and 3D printing is conducted according to the adjusted parameters of the biteplate, and the biteplate is manufactured. According to the manufacturing method, accurate and rapid manufacturing of the occlusal stable temporomandibular joint disorder treatment jaw plate can be achieved, and through combination of the semi-adjustable jaw frame and digital design, the treatment success rate can be remarkably increased, the pain of a patient can be relieved, and the life quality can be improved.

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 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 the technical field of tooth implantation, in particular to an artificial ceramic implant for a premolar, which comprises an implant root implanted into a gum and an abutment connected with a dental crown, the implant root part comprises a smooth column head part, a threaded part and an implant neck part which are sequentially adjacent to one another from bottom to top; wherein the bottom end of the smooth column head is hemispherical; the upper surface of the neck part of the implant neck part is quadrilateral, the lower surface of the neck part is circular, and the side wall of the neck part is arc-shaped; and the base station is arranged on the upper surface of the neck part. The structure is implanted in a knock-in mode, the implanting operation time is short, the operation difficulty is low, postoperative recovery is fast, and the problems of intraoperative bleeding and postoperative swelling can be solved.

The utility model discloses a molar mesial movement auxiliary device which comprises a main arch wire, a plurality of orthodontic brackets, an auxiliary arch wire, a ligature wire and an anchorage nail, the main arch wire penetrates through the orthodontic brackets and is fixed with the orthodontic brackets, two question mark hooks of the auxiliary arch wire are sleeved on the main arch wire, and the ligature wire is connected with the anchorage nail. The auxiliary arch wire is further provided with two small circles formed by bending, the small circle in the distal direction is rigidly connected to an anchorage nail planted on the alveolar bone through a fixing ligature wire, and the other small circle is free. According to the utility model, a stable rectangular structure can be formed, after force application, interference caused by lip and cheek movement or feeding is avoided, displacement is avoided, foreign body sensation is reduced, the bad effect of distal movement of anterior teeth and premolars can be avoided, friction force of tooth movement is not increased, and meanwhile, the structure is simple and convenient. And when the molars move forwards, the lip inclination acting force on the anterior teeth is also reduced.

The invention provides a 3D printing dental model detection method to improve the measurement accuracy of a dental model, and relates to the field of 3D printing model detection. The 3D printing dental model detection method comprises the following steps: respectively adding a first measurement positioning column and a second measurement positioning column at post-molar areas on two sides of a dental three-dimensional model by utilizing 3D printing processing software, and respectively adding a third measurement positioning column and a fourth measurement positioning column at pre-molar areas on two sides of the dental three-dimensional model, adding a fifth measurement positioning column in the anterior tooth area of the dental three-dimensional model; printing a dental model; performing measurement; and calculating the X axial precision SX, the Y axial precision SY, the front end external expansion deformation rate R < front > and the front end external expansion deformation rate R < rear > of the dental model. According to the invention, the printing precision condition of the dental model can be better monitored.

An orthodontic appliance, being an aligner or retainer, includes upper and lower appliance members, upper and lower biting walls, and at least two bulges. The appliance defines a receiving space for receiving a crown of the teeth. When the appliance is fully installed, the mandible is in centric relation, and the upper and lower biting walls contact each other adjacent to right and left molars of the teeth, then right and left bulges are situated over right and left premolars of the teeth, and a distal end of each bulge is dimensioned to contact the opposing biting wall.

This invention relates to a mandibular premolar guiding device for reducing labial inclination of the lower anterior teeth. The device includes an upper molar band, a lower molar band, a premolar guide, a push plate, and an implant. The upper and lower molar bands are fixed to the upper and lower molars, respectively. The premolar guide is located on the buccal side of the upper molar band, and the push plate is fixed on the buccal side of the lower molar band. The front end of the premolar guide bends downward to form a pusher portion. During occlusion, the pusher portion pushes against the push plate to achieve mandibular premolar guidance. The buccal side of the lower molar band also has a buccal tube. The lower incisor has a bracket. The buccal tube and the bracket are connected by a lower archwire. The lower archwire has a lower traction hook corresponding to the lower incisor. The implant is located between the lower molar and the lower premolar. The implant and the lower traction hook are connected by a traction member. This device can simultaneously achieve mandibular premolar guidance and reduce labial inclination of the lower anterior teeth.

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.

An orthodontic appliance for partial distalization of a posterior mandibular region is disclosed. The appliance includes a mesial element having a mesial base surface configured for attachment to a premolar or canine, a protrusion for connecting to a retraction element, and an arm. The arm includes a lateral pivot at a distal end of the arm. The appliance further includes a distal element having a distal base configured for attachment to a molar and a distal cap, the lateral pivot being disposed between the distal base and the distal cap. A method of assembling the orthodontic appliance is also provided.

The utility model relates to a novel bonding type orthodontic anterior molar auxiliary device. The novel bonding type orthodontic advanced molar auxiliary device comprises cast belt rings, a lingual arch, a long-arm traction hook and an arch wire, the cast belt rings are installed on a first premolar and a second premolar on the two sides and connected through the lingual arch, and the cast belt rings are installed on the second molar on one side of a gap; a bracket and a buccal tube are respectively arranged on the cast belt rings on the buccal sides of the second premolar and the second molar on one side of the gap, an arch wire is fixed between the bracket and the buccal tube, and long-arm traction hooks are mounted on the bracket and the buccal tube and are connected through an elastic chain ring. According to the scheme provided by the invention, through buccal tongue side double-track stress application, the lingual inclination and torsion of the molars when the molars move forwards are greatly avoided, and the overall movement of the molars is realized; the applied force can be adjusted, the correction effect is improved, the anchorage strength is high, and the forward molar effect is stable.

The present invention discloses a method for identifying feature points based on the tooth's own coordinate system, and relates to the field of dental orthodontics in a digital oral cavity. The input conditions of the method are the conversion matrix of the tooth model and the coordinate system. All teeth have an axis point and a gingival point. For different teeth, the central incisor and the lateral incisor also have an incisal angle point and an incisal ridge midpoint, the canine also has a cusp point, the premolar also has two cusps in front and behind and a nest point, and the molar also has four cusps and a nest point. The present invention can automatically identify the feature points of different teeth based on the tooth's conversion coordinate system, greatly improving the efficiency of feature point recognition and reducing errors caused by personal subjective factors.

The invention discloses an oral orthodontic device with traction and molar distalization functions, and relates to the technical field of orthodontics. The device comprises a gum and an arch expander located on the gum, wherein the arch expander is divided into a left part and a right part; the gum comprises a dental arch and a plurality of premolars and postmolars positioned on the upper side of the dental arch, and the premolars and the postmolars are divided into a left part and a right part; the arch expanding device comprises a box body, molar bands located on the premolar and the postmolar, and a push rod arranged between the two molar bands. The reel is arranged in the box body, the connecting piece located on the peripheral side of the reel can be wound or released, when the connecting piece is wound, the connecting piece gradually gets close to the reel, so that the molar band is driven to move, the function of distally moving the molar is achieved, and the movement of the molar band can transmit force through the push rod; therefore, the whole oral cavity correction device applies proper acting force to the dental arch so as to achieve the effect of forward traction.

To provide an improved crown structure which has high discharge efficiency, allows visual confirmation of the adhesive filling state, ensures the structural strength of the crown, prevents the accumulation of food residues and suppresses intraoral infection, does not require the re-removal of a sealing member after surgery, is adaptable to various tooth positions such as anterior teeth, premolars and molars, and can improve the effectiveness and safety of dental prostheses. [Solution] This invention relates to an improved crown structure in the field of dental prosthetics, and includes a crown body 1 that conforms to the shape of an abutment tooth. The crown body is formed with drain holes that penetrate from the bonding surface 3 to the outer surface 4, and the drain holes have a gradually changing diameter structure. The drain holes have a guide groove on their inner periphery, a conical flared opening on the bonding surface side, and an annular reinforcing rib on the outer surface side. The crown also includes a biodegradable sealing member.

An orthodontic appliance and assembly for distal movement of segments in the posterior jawbone region is disclosed. The orthodontic appliance comprises a mesial element having a mesial base surface configured for attachment to a premolar or canine, an arm having a pivot at the distal end of the arm, and a distal element having a distal base surface configured for attachment to a molar. The distal element or distal portion of the arm comprises a distal anchoring structure for connecting a first distal movement force element. The mesial element may have a projection defining a groove for fitting an elastic band, the groove being positioned along a rounded convex surface of the projection having a diameter of at least 3 mm. A method of treatment is also provided.

The utility model discloses an improved headgear mouth external arch appliance, and relates to the technical field of oral cavities. Comprising an appliance body, a labial arch, an extraoral arch tube, an extraoral arch and a lower jaw lip shield, the labial arch is arranged in a front tooth area of the appliance body, the extraoral arch tube is arranged in a front molar area of the appliance body, the extraoral arch is detachably arranged on the extraoral arch tube, and the lower jaw lip shield is arranged below the appliance body. The orthodontic appliance is reasonable in structural design, better in orthodontic effect and higher in practicability.

The utility model provides an appliance for correcting Angler class III malocclusion. Comprising an upper jaw casting type expansion device, a lower jaw casting type lip shield and an elastic connecting piece, and the upper jaw casting type expansion device comprises a spiral expander, a front palatal bar, a rear palatal bar, a palatal side connecting rod, an anterior tooth separated palatal arch, a cheek side traction hook, an upper jaw first premolar casting belt ring and an upper jaw first molar casting belt ring; a cheek tube is arranged on the upper jaw first molar casting belt ring; the lower jaw casting type lip shield comprises a labial arch, a lingual arch and a lower jaw first molar casting belt ring, and a lip shield traction hook is arranged at the front part of the labial arch; the elastic rubber ring is used for traction between the cheek tube and the lip shield traction hook of the appliance, and is matched with the rapid expansion and contraction of the maxillary to achieve the effect of correcting III-type malocclusion, so that a patient can wear the appliance all day long, the development of the maxillary bone is promoted, the correction period is accelerated, and the appliance does not need to depend on a mask tractor outside the mouth.

Methods for providing results of orthodontic realignment simulations comprising: obtaining three-dimensional virtual models of dental arches, the models compiled from intraoral scans of a mouth; based on the shapes of the modeled dental arches, selecting matching predefined archforms; obtaining at least one of: a first set of rules that define anterior and posterior molar movement, a second set of rules that determine a path of tooth movement to the matching predefined archforms, or a third set of rules that define simulation mechanics for moving at least one tooth to a final position based on known endpoint data and the matching predefined archforms; and based on results from implementing at least one set of rules, determining final positions of the teeth in relation to the matching predefined archforms.

A sliding molar distalizer is provided. The distalizer features a canine attachment bracket, a molar tube, and a rod connected to the bracket and having an engagement end for engaging the molar tube. A hook formed on a portion of the rod receives an elastic for imparting distalization force directly on the distalizer towards the molar tube. An orthodontic tube formed on the attachment bracket holds an archwire that passes through premolar brackets. A buccal push flange lever is formed at a distal portion of the rod for imparting force on the molar tube.

The invention relates to a shell-shaped dental appliance for correcting rear teeth and a design method of the shell-shaped dental appliance. The appliance comprises a first segment shell unit, a traction structure and a second segment shell unit, the first segment shell unit and the traction structure form a first tooth receiving cavity, and the second segment shell unit forms a second tooth receiving cavity; the first segment shell unit can accommodate canine teeth or premolar teeth of a patient, and the traction structure is fixedly connected with the first segment shell unit; the traction structure is used for hanging elastomers; the second segment shell unit can accommodate another premolar or molar of the patient, and the second tooth receiving cavity applies a second tooth moving force to the accommodated tooth; the second segment shell unit applies a second tooth moving force to the accommodated teeth; and the first segment shell unit is connected with the elastic body through a traction structure. Compared with the prior art, the orthodontic force is accurately controlled; personalized design is realized; and the stability and controllability of the treatment effect are improved.

The invention provides a moisture absorption paper tip set for an apical operation. Comprising a first moisture absorption paper tip set suitable for conventional tooth positions, a second moisture absorption paper tip set suitable for tooth positions with fused root canals and thick root canals and a first maxillary premolar with isthmus. The moisture absorption paper tip group III is suitable for upper jaw first molars with isthmus on two mesial cheek roots; the moisture absorption paper tip group IV is suitable for lower jaw second molars with C-shaped root canals; the first moisture absorption paper tip set, the second moisture absorption paper tip set, the third moisture absorption paper tip set and the fourth moisture absorption paper tip set each comprise a clamping part and a water absorption part, and the water absorption part of the first moisture absorption paper tip set is in a cylinder shape with the diameter being 0.6 mm. The water absorption part of the moisture absorption paper tip group II is a cylinder with the diameter of 0.8 mm; the water absorption part of the moisture absorption paper tip group III is a column with a barbell-shaped section; the width of the barbell-shaped section is 1.7 mm, the thicknesses of the two ends are 0.6 mm, and the thickness of the middle is 0.5 mm; a water absorption part of the moisture absorption paper tip group IV is a column with a fusiform section; the width of the fusiform section is 1.7 mm, the thickness of the middle of the fusiform section is 0.6 mm, and the two ends of the fusiform section are sharp.

An orthodontic device for pulling upper incisor teeth to achieve facial balance, comprising a first device (1) comprising an upper plate (5) located behind six upper incisor teeth and firmly fixed with an orthodontic adhesive, a first hook (3) and a second hook (4) being connected to the upper plate (5) of the first device, and a second device (2) comprising a right plate (6) and a left plate (7) covering all upper posterior teeth, a first wire (8) is connected to the right plate (6) and the left plate (7), and a second wire (9), which is a stainless steel spring hard wire at the premolar, is made into a left U-ring (12) and a right U-ring (13), while both ends of the wire are connected to the right plate (6) and the left plate (7).

The application relates to the field of orthodontics, in particular to a vertical molar fixing device, which comprises a fixing ring, a traction connecting rod and a traction member. The fixing ring is matched with a target premolar, the fixing ring is used for sleeving the premolar, one end of the traction connecting rod is connected with the side wall of the outer circumferential surface of the fixing ring, the other end of the traction connecting rod extends away from the fixing ring, a pulling hook is arranged at the end of the traction connecting rod away from the fixing ring, one end of the traction member is detachably connected with the pulling hook, and the other end of the traction member is connected with the target tooth; the traction member pulls the target tooth when being tensioned. The fixing ring is arranged on the premolar to fix the traction connecting rod. The traction member connected with the traction connecting rod is used for pulling the supernumerary tooth. The fixing ring has a simple structure and can be directly fixed on the tooth without the aid of additional screws, so that the installation steps and the device structure are simplified, and the experience of the patient after installation is improved.

The utility model provides a mandibular push molar distalization device suitable for bony class III malocclusion, which comprises a tail end guide rail, a front end guide rail, a push rod and a sleeve type push spring, the tail end guide rail is fixed on the last tooth needing to be moved, the front end guide rail is fixed on canine teeth or first premolar teeth at the turning position of a dentition dental arch, and the push rod is fixed on the sleeve type push spring. A push rod is arranged between the tail end guide rail and the front end guide rail in a penetrating mode, a traction hook is arranged at the end, penetrating through the front end guide rail, of the push rod, a tail end blocking ball is arranged at the other end, penetrating through the tail end guide rail, of the push rod, a sleeve type push spring is movably connected between the tail end guide rail and the front end guide rail in a sleeved mode, and a free buckle for blocking and limiting the sleeve type push spring is arranged on the push rod. The traction hook is connected with a jaw anchorage component such as an anchorage nail through a rubber band. The mandibular molars can be pushed to the distal direction, the mandibular molars can be pushed to the distal direction, meanwhile, the mandibular molars can assist in promoting the development of the maxilla and inhibiting the development of the mandible for other clinical bony III-type malocclusion orthotic devices, the structure is scientific and reasonable, the mandibular molars are simple and practical, the mechanical analysis is simple and clear, the use comfort of a patient is high, and the orthotic effect is good.