37 results about "Maxillary molar" patented technology

Provided is a dental prosthesis formed as artificial molars designed for a lingualized occlusion, comprising the total of four teeth including a first premolar, a second premolar, a first molar and a second molar in a maxilla or a mandible, which are interconnected in a single prosthesis. An artificial maxillary molar is configured to have a blade form in a lingual cusp thereof, and a protrusion is formed in buccal cusps of a mandibular second premolar and a mandibular second molar so as to define a gap for gliding movement to take place between said artificial mandibular molar and oppositely-located artificial maxillary molars. A groove is formed in a bottom side of the four interconnected artificial molars, said groove extending throughout said four teeth and open at an end of the first premolar and an end of the second molar.

The invention enables to arrange artificial molar teeth at appropriate positions according to the oral cavity environment of each patient without requiring advanced techniques or experiences. The invention relates to artificial molar teeth having maxillary molar teeth 1 to 4 and mandibular molar teeth 5 to 8 to be arranged so as to form a pair on denture bases 57, 58 to be mounted on upper and lower jaws in an oral cavity, in which one cusp out of the cusps of the maxillary molar teeth 1 to 4 and the mandibular molar teeth to 8 is engaged with a fossa of the antagonist, and at least one of the other cusps is engaged with a groove of the antagonist.

The invention relates to the technical field of orthodontics, and discloses an orthodontics treatment device. The device comprises a lingual-side cast web plate wore on maxillary incisors, a plane guide plate arranged on the surface of the cast web plate, and combination cast crowns connected to two ends of the cast web plate, wherein each combination cast crown contains maxillary ipsilateral cuspid teeth and a first front premolar. A buccal-side hook connection bar and a lingual-side (occlusal) rest connecting rod extend out of each combination cast crown. The hook connection bar is connected to a lowering hook, which is arranged in the buccal-side center of to-be-lowered maxillary molars. The (occlusal) rest connecting rod is connected to an (occlusal) rest, which is arranged on rear molars of the to-be-lowered maxillary molars. Through the orthodontics treatment device, occlusion can be opened and elongated maxillary incisors are lowered at the same time, and the problem of multiple staggered occlusion is solved. The device is beneficial for saving curative time and cost and relieving wound suffered by patients during a therapeutic process.

The invention enables to arrange teeth at appropriate positions depending on the oral cavity environment of each patient without requiring advanced techniques or experiments. In artificial molar teeth to be arranged on bases 33, 34 which are mounted in an oral cavity as a dental prosthetic appliance, an occlusal surfaces of the teeth 1, 2, 5, 6 are provided with side grooves 29 to 32 extending toward a buccal side or lingual side, and intersecting portions (tops 29a to 32a) of the side grooves 29 to 32 with the outer circumference of the occlusal surface, and a contact point 35 are formed on a plane parallel to the mesical distal direction. Or the teeth 1, 2, 5, 6 are configured such that the bottom ends of fossae 25, 27 on the occlusal surface and the contact point 35 are formed on a plane parallel to the mesical distal direction. Alternatively, mutually parallel flat frictional contact portions 9 to 12 are provided around cusps 13A, 13B to 16, 17A, 17B to 20 mutually contacting with maxillary molar teeth 1, 2 and mandibular molar teeth 5, 6, respectively.

Maxillary molar teeth and mandibular molar teeth are formed so as to be different in intersection angles (vertical line angles) between vertical lines extending in a vertical direction to occlusal facets and occlusal planes. That is, the maxillary molar teeth and the mandibular molar teeth are formed so as to be different in intersection angles of vertical lines of the protrusive occlusal facet and retrusive occlusal facet respectively. The occlusal facets of at least one of buccal cusps of the maxillary molar teeth and lingual cusps of the mandibular molar teeth are designed so that at least one of the width in the mesiodistal direction and the width in the cuspal-cervical direction is smaller than the occlusal facets of the opposite cusps of the antagonist molar teeth.

The invention discloses a U-shaped palate rod for invisible correction of a molar distal movement patient and a correction method. The U-shaped palate rod comprises two connecting bodies, two tractionhooks and a U-shaped palate rod body, wherein one end of each two connecting body is connected with the left and right first molar tongue sides of the upper jaw, and the other end of each two connecting body is connected with the two ends of the U-shaped palate rod body respectively; the connecting faces of the connecting bodies and the first molar tongue sides of the upper jaw keep away from thegingival margin by 2mm and keep away from the tongue tip by 2mm; the connecting faces wrap the mesial and distal parts of the first molar tongue sides of the upper jaw to increase the bonding area; abottom plate is subjected to gridding treatment; the U-shaped palate rod body is designed in the dental arch shape, and the palate mucosa is kept away from the U-shaped palate rod body by 2-3mm and does not make contact with the palate mucosa; and the two traction hooks are connected to the corners of the two sides of the front portion of the U-shaped palate rod body respectively and extend downwards and forwards. The U-shaped palate rod is used for stabilizing the rear tooth position during invisible correction of molar distal movement, the correction force can directly act on the upper jawmolars, molar mesial movement relapse is prevented, maximum adduction and congestion relief of the front teeth are facilitated, the correction efficiency is improved, the patient feels more comfortable, the correction efficiency is high, and the U-shaped palate rod is attractive and hidden.

The invention provides a two-dimensional maxillary molar moving device, and relates to the field of orthodontic instruments. The two-dimensional maxillary molar moving device comprises left and rightretention parts and a stressing part; the left and right retention parts are respectively arranged at the left and right sides of the palatal suture; the stressing part is connected with the left andright retention parts; each retention part comprises a metal crown covering the first molar, and a retention plate with a transverse groove in the middle; the metal crown and the retention plate are arranged at the same side of the palatal suture, and connected through a steel wire; the buccal side of the metal crown is connected to an implant nail sleeve corresponding to the maxillary zygomatic alveolar ridge; and two sagittal ends of the retention plate are respectively provided with stressing part installation holes. The retention parts in the invention can be appressed to the palatal mucous membrane to the most extent; a micro implant nail can be implanted in bone to the most extent; the failure risk in the stressing process of the micro implant nail can be reduced; and furthermore, ina correction process, the transverse enough width change of the maxillary can be realized without disassembling the micro implant nail.

The invention discloses a preparation method of an appliance for abnormality repositioning of mandible. The method comprises the steps: firstly, obtaining an initial dental jaw model of a patient, wherein the occlusion relation of upper and lower dentitions in the initial dental jaw model serves as an initial relative position of the model; determining a lower jaw repositioning model after repositioning the lower jaw of the patient according to the initial relative position of the model; designing an upper molar jaw pad group and a guide inclined plane model group according to the lower jaw repositioning model, and fusing the structures of the upper molar jaw pad group and the guide inclined plane model group to obtain a printing model group; designing an appliance accessory model group adhering to the labial surface or the lingual surface of the teeth; and combining the lower jaw repositioning model, the printing model group and the appliance accessory model group A, printing through3D to obtain an upper jaw model and a lower jaw model, and forming and cutting the printed model through a hot pressing film to obtain the lower jaw repositioning appliance. In the process of lower jaw repositioning correction, invisible correction and functional correction are simultaneously carried out.

The invention discloses a molar anchorage control method for invisible orthodontic extraction cases. The method comprises the following steps that 1, a basic virtual model of the number of to-be-corrected teeth of the upper jaw and the lower jaw is obtained, and initial positions of maxillary molars and mandibular molars are determined on the basic virtual model separately; 2, on the basis of the initial positions of the maxillary molars and the mandibular molars, target positions of the maxillary molars and the mandibular molars moving to the distal are determined separately; 3, the maxillary molars and the mandibular molars are made to tilt to the distal to the reach the corresponding target positions from the initial positions through an invisible bracketless appliance. Accordingly, control in the three-dimensional direction of anchorage molars can be achieved conveniently without any assisted segmental arch technique or extraoral force; molar crowns can be made to tilt to the distal only through the action of the invisible bracketless appliance; the angle of the molars tilting to the distal can be accurately controlled; anterior teeth can be effectively adducted by controlling anchorage, and a good treatment effect on correction for anterior teeth protrusion or anterior teeth crowding cases is achieved.

The invention provides a tooth correcting appliance and a use method of the tooth correcting appliance. According to the tooth correcting appliance and the use method, a molar distalization palatal bar and a micro-implant anchorage nail are combined for use, and the maxillary molar is distalized by utilizing the elastic deformation of a nickel-titanium tension spring. The tooth correcting appliance is simple in structure and small in size; when the tooth correcting appliance is cemented to the oral cavity of a patient, the foreign body sensation is tiny, the exertion of the effects of the tooth correcting appliance does not depend on the coordination of a patient, and the effects are stable; the tooth correcting appliance is easy to manufacture and operate, and the whole set of device is low in cost and price, and has no high requirements on the technologies of technicians; the blocking of the position of the micro-implant anchorage nail for the root of the distalized maxillary molar does not need to be considered, and thus the workload during the treatment period can be effectively reduced; the distal tilting and lingual rotation can not be generated, and thus the effects of improving the occluding relation and treating the posterior are achieved.

The invention relates to a molar depressing device. The molar depressing device comprises a tooth socket and a depressor arranged at the middle part of the tooth socket, wherein the tooth socket comprises a support plate with an arc-shaped structure; a first accessory group is fixed to one end part of the support plate, and a second accessory group is fixed to the other end part of the support plate; a first sleeve of a cylindrical structure is fixed onto the support plate close to the first accessory group; a second sleeve of a cylindrical structure is fixed onto the support plate close to the second accessory group; a first inserted link and a second inserted link are separately arranged at the two ends of the depressor; the first inserted link can be nested inside the first sleeve; andthe second inserted link can be nested inside the second sleeve. Thus, a maxillary molar is subjected to depressing treatment through the tooth socket in a manner of being matched with the depressor,and wounds to a sufferer are effectively reduced.

The invention discloses an artificial crown for a maxillary molar. The crown comprises a combined crown prosthesis, wherein an overflow groove is arranged at the gingival end of the combined crown prosthesis, and is used for cleaning the gingival end of the combined crown prosthesis. During use, a channel with two ends communicating with the oral cavity is formed between the overflow groove and the gingiva. The overflow groove is preferably mesial-distal; and during use, the overflow groove is located between the palatine root and the mesiobuccal and distobuccal roots, and the proximal and distal ends of the overflow groove are both palatally presented. By designing the overflow groove at the gingival end, the artificial crown for the maxillary molar is good for self-cleaning of teeth, canremove hidden plaque and tartar, control periodontitis and prevent root caries, and the long-term curative effect of dental root bisection of the maxillary molar is improved.

A method and system for treating maxillary transverse discrepancies in young orthodontic patients and in skeletally mature patients. The maxillary protraction device comprises a Hyrax provided with an adjustable screw and four bands connected to the Hyrax through connecting wires.

Placement of Hyrax on first maxillary molars and second maxillary premolars would create enough space for effective treatment of maxillary hypoplasia.

The invention provides a device of using an implant anchorage to distalize a maxillary molar. The device is characterized by comprising: a cast support having palatal side connectors arranged on two lateral face fixing portions and between two face fixing portions; the implant anchorage fixed to the mandible; a palatal side connector traction hook having elasticity, wherein one end of the palatalside connector traction hook is connected with the implant anchorage, the other end of the palatal side connector traction hook is hung to the palatal side connectors, the palatal side connector traction hook applies elastic force to the palatal side connectors. The cast support covers the occlusal faces of the molars on two sides; the cast support can cover more than the occlusal faces of more than two molars, forming a plane, and ensuring that oblique movement is avoided to maximum extent during molar distalization.

The invention relates to a dissolving strip for drug delivery providing a generally inert water soluble base material attached to the maxillary molars in order to deliver a therapeutic material upon activation by the parotid and other oral salivary glands. The composition of the dissolving strip is a generally inert base material, such as pullulan. The pullulan is impregnated with a therapeutic material to form a solid mixture to carry the therapeutic agent. The dissolving strip has sufficient flexibility to adhere to the 1-4 maxillary molars and acts as a reservoir to deliver therapeutic agents, such as an anti-smoking formula, a diet formula, a sexual enhancement formula, an oral freshness formula, prescription drugs, non-prescription drugs, herbs, or vitamins, or any combination of the previously listed. The dissolving strip is capable of delivering the therapeutic agents in a sustained or time released fashion.

The invention discloses an upper anterior tooth 90-degree torsion appliance and a preparation method thereof, and belongs to the technical field of tooth correction. The upper anterior tooth 90-degreetorsion appliance comprises lip side traction hooks and a torsion tooth near distal tongue side buckle, wherein elastic rubber rings are arranged between the lip side traction hooks and the torsion tooth near distal tongue side buckle, a distal adjacent surface guide plate is arranged in a torsion tooth distal gap, and retention devices arranged on upper jaw molar teeth on two sides are arrow clamping rings. The lip side traction hooks and the arrow clamping rings are all embedded in an upper jaw palate side resin base support. The preparation method comprises the following steps: preparing an upper and lower jaw working model; trimming the working model; making the lip side traction hooks and a double-side rear tooth arrow clamping ring in a bending manner, making the resin base supportof the appliance through a novel injection molding process, enabling the arrow clamping rings and a traction hook tongue side to be embedded in the resin base support, and enabling the base support toextend to the distal end of a torsion tooth and form an integrated structure with the distal adjacent surface guide plate. The appliance prepared by the preparation method disclosed by the inventioncan efficiently solve the problem of severe torsion during eruption of the anterior teeth of a child, thoroughly avoids the situation that the torsion teeth do distal movement and lose tooth lacking gaps, and enables a child patient to wear comfortably.

A support for maxillary sinus floor elevation is integrally elongated and has a circular section. A blunt portion, a smooth section, a threaded section and a projecting section are sequentially arranged on the support from top to bottom, the sectional radius of an optional position of the support is not larger than that of an optional downward position, the projecting section is a radial expansionportion at the lower end of the threaded section, the blunt portion is integrally smooth, and the lower end face of the projecting section is provided with a groove. When the support is mounted, theblunt portion, the smooth section and the threaded section are sequentially screwed into a maxillary sinus cavity from bottom to top until the projecting section can be clamped at an alveolar ridge crest of a local area of maxillary molar. The section of the support is circular, the diameter of the upper end of the support is not larger than that of the lower end of the support, and the support iseasily inserted into a maxillary sinus. The smooth blunt portion can support a maxillary sinus floor mucous membrane, and the maxillary sinus floor mucous membrane cannot be pierced. The threaded section can maintain the stability of the support by the aid of the height of a local area alveolar bone, and the groove in the lower end face of the projecting section is used for assembling or disassembling the support.

An occlusion evaluation apparatus capable of evaluating a masticatory ability depending on an occlusal geometry of teeth without actually used by a human subject, reads three dimensional data of geometries of maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8, and specifies a geometry of a fluxion space Va defined by a plane Sa which includes two adjacent contact points Pa between the maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8 and which is perpendicular to the occlusal plane, the occlusal surfaces of the maxillary molar teeth 1, 2, 3, 4, and the occlusal surfaces of the mandibular molar teeth 5, 6, 7, 8.

The invention discloses a Nance arch orthodontic molar control device. The device comprises a base support part, a pair of sliding block assemblies, a belt ring, and a retention part;sliding rods are arranged on the two sides of the base support part respectively; when the base support part is arranged on the front portion of the hard palate of a patient, the sliding rods are located on the palate sides of dentitions on the two sides of the upper jaw of the patient respectively; each sliding block assembly is arranged on one sliding rod, each sliding block assembly comprises an elastic piece and a pair of sliding blocks, the two sliding blocks are sequentially arranged on the sliding rod in a sliding mode, and the elastic piece is connected between the two sliding blocks; the belt ring is arranged on the sliding block close to a distal direction, and the belt ring is installed on the molar of the patient; and the two ends of the retention part are connected to the two sides of the base support part respectively, and a retention ring is arranged on the retention part. According to the Nanoce arch orthodontic molar control device, the positions of maxillary molars can be controlled more simply and conveniently, and various orthodontic anchorage designs are realized.

The invention discloses an implant method of maxillary molar without bone grafting and sinus floor elevating and dental implant. The implant method comprises the steps that after anatomic proximity relation is defined through CT scanning, an implant is implanted by keeping 20 to 25 degrees from maxillary sinus floor, after drilling a 12 mm hole with a helical auger, spreading moving is performed in cancellous bone with a dilator, a matched screw tap is used for tapping for two times, and then the implant is screwed into the cancellous bone; the first maxillary molar is implanted at 20 degrees deviating from the palate and the second pairs of canine teeth, and the second molar is implanted at 20 degrees deviating from the palate and the maxillary tuberosity. One side of three threads at the upper part of the taper thread implant is protruded, and the protruded length is one third of the perimeter. The invention has the advantages that the implant can be implanted at 20 degrees of deviation as the general implant method and the healing period is six months, bone grafting and sinus floor elevating are not required, the implanted implant can not penetrate the maxillary sinus floor, and sufficient bone can be ensured to surround the implant. The operation is simple, the success ratio is high, the time is short, the cost is saved, and the method is convenient to be popularized. The method enables general population to enjoy the dental implant service.