54 results about "Posterior Tooth" patented technology

A composite material is provided which, while having an unusually high filler content may be extruded from a dental syringe and remains easily adaptable in the dental cavity. When materials of the present invention are cured, dental restorations are provided which have unusually high surface hardness and yield strength, as well as a low volume shrinkage on curing. This is achieved by use of a mixture of filler particles with a specific size, size range, and size relationship. Such a combination of properties makes the material of the present invention particularly useful for restoring cavities in posterior teeth.

A composite material is provided which, while having an unusually high filler content may be extruded from a dental syringe and remains easily adaptable in the dental cavity. When materials of the present invention are cured, dental restorations are provided which have unusually high surface hardness and yield strength, as well as a low volume shrinkage on curing. This is achieved by use of a mixture of filler particles with a specific size, size range, and size relationship. Such a combination of properties makes the material of the present invention particularly useful for restoring cavities in posterior teeth.

An unimpeded distalizing jig, comprising a pair of tooth bond pads, an intra dental arch telescoping assembly, comprising a rod-like insertion and a tubular shell, which constrains the rod-like insertion to move with respect to the tubular shell along an elongated axis, which may be a radial path; and a force generating structure configured to supply an off-axis distalizing force to the intra dental arch telescoping assembly, such that the distalizing force is provided to the posterior tooth substantially without applying an anteriorizing force on the anterior tooth. The force generating structure may be an elastic band fixed by a hook to the tubular shell on one side, and to a molar on an opposing dental arch on the other side.

The invention discloses a maxillary sinus external lifting operation auxiliary guide plate and a preparation method thereof. The preparation method comprises the following steps of: obtaining scanningdata of a posterior tooth grafting area, a corresponding maxillary sinus area and an adjacent area, and reconstructing the scanning data into three-dimensional data; the maxillary sinus elevation region was extracted from the reconstructed three-dimensional data and extended to the palatal side of the implantation region and the adjacent region. The extended external maxillary sinus lifting operation area was thickened, and an opening was reserved at the corresponding position of the fenestration hole, and then the boundary of the thickened external maxillary sinus lifting operation area wasfused and preserved. The maxillary sinus external lifting operation auxiliary guide plate is obtained by printing that saved data through a printing device; The method can prepare individualized auxiliary guide plate for different patients, ensure the matching between the auxiliary guide plate and different patients, and improve the accuracy of maxillary sinus external lifting operation; In addition, the method is easy to operate and low in cost, which is easy to be popularized.

The invention discloses an invisible correction method for treating class 2 and class 3 malocclusion by using an occlusion repositioning device, which comprises the following steps: respectively fixing the occlusion repositioning device on the mandibular or maxillary posterior tooth area on both sides, taking a maxillary and mandibular full-mouth model, filling a plaster model, scanning, transmitting an obtained STL file to invisible correction design software, performing multi-step invisible correction design, finally forming an STL design file, outputting the STL design file to a 3D printer to print a female mold, and pressing a transparent high polymer material on the female mold to form the bracket-free invisible corrector. The design process of the invention comprises the following steps: firstly, fixing an occlusion repositioning device to a back tooth area, connecting the back tooth area as a whole, not designing movement, only correcting an anterior tooth area, correcting the back tooth area, and finally finely adjusting the positions of upper and lower jaw teeth, thereby finishing orthodontic treatment of class 2 and class 3 malocclusion.

A set of artificial teeth for a denture comprises a maxillary unit and a mandibular unit. When set up in lingualised occlusion, at least one of following occurs: the palatal cusp of the upper 4 (1) fits into the distal fossa of the lower 4 (6), the palatal cusp of the upper 5 (2) fits into the distal fossa of the lower 5 (7), the mesial palatal cusp of the upper 6 (3) fits into the central fossa of the lower 6 (8), the distal palatal cusp of the upper 6 (4) fits onto the marginal ridge of the lower 6 (9) and the mesial palatal cusp of the upper 7 (5) fits into the central fossa of the lower 7 (10). The buccal cusps of the lower teeth are out of contact with the upper teeth, such that the cusp / fossa dimensions and relationships of the teeth concerned enable the occlusal scheme for the teeth to be changed from lingualised to balanced occlusion simply by softening the wax or resin under the upper posterior teeth and rotating the upper buccal cusps downwards around the said palatal cusps on the upper teeth with such palatal cusps still substantially remaining within the centric stops of the lowers.

The embodiment of the invention discloses a bony III-class malformation correction method, which comprises the following steps of: quickly aligning teeth by adopting a multi-effect nickel-titanium arch wire, retracting anterior teeth by utilizing an anchorage nail and a constant-force tension spring to remove anterior tooth reverse on the premise of removing anterior tooth occlusion disorder, and after the anterior tooth reverse is removed, lifting upper and lower posterior teeth by using a TMA wire in a step curve manner, quickly establishing a posterior tooth occlusion relationship, stabilizing a new position of retreat of a mandible, removing an anterior tooth occlusion wound, and lifting and clockwise inclining the plane of the rear part of the mandible on the premise of maintaining normal coverage of the anterior teeth so as to promote clockwise rotation of the mandible, retreat of the chin of the mandible and lip inclination of the anterior teeth, and finally adjusting the occlusion stage to observe the condition of a patient. According to the invention, the mandibular prolapse can be effectively improved, and the reverse face type can be improved, so that the non-tooth extraction correction of adult bone mandibular prolapse cases can be completed.

The invention provides a posterior tooth decompression bite plate and a manufacturing method thereof, relates to the technical field of orthodontic instruments, and is used for improving the treatmenteffect of treating temporal-mandibular joint disorder comprehensive syndromes. The posterior tooth decompression bite plate comprises a retainer and a bite guide body, the retainer extends in a curveconsistent with the dentition in shape and comprises a palate side wall, a buccal side wall and an occlusal surface, the palate side wall and the buccal side wall are oppositely arranged, the occlusal surface is connected between the palate side wall and the buccal side wall, and the palate side wall, the buccal side wall and the occlusal surface define a tooth socket used for being fixed to thedentition. Wherein the occlusion guide body is arranged in a molar area of the retention body, comprises an occlusion surface used for being propped against jaw teeth, and is used for strutting an upper jaw dentition and a lower jaw dentition and enabling a lower jaw condylar process to retreat to an edge position limited by a temporal-mandibular ligament. The posterior tooth decompression bite plate provided by the invention is used for treating temporomandibular joint diseases.

The invention discloses a temporomandibular joint condyle development inducer and a preparation method thereof. A centric relation position, a condyle guide and an incisal guide of a patient are obtained through an electronic facebow; a virtual occlusion frame is set in three-dimensional modeling software according to the centric relation position, the condyle guide and the incisal guide; a firstpair of mandibular occlusal pads is designed according to the virtual occlusal frame; a bilateral mandibular ramus height difference value and a mandibular tubercle sagging compensation amount of thepatient are obtained through imaging examination; and the thickness of a posterior tooth area occlusal pad of the first pair of mandibular occlusal pads is adjusted according to the bilateral mandibular ramus height difference value and the mandibular tubercle sagging compensation amount to obtain an Nth pair of mandibular occlusal pads. Therefore, early non-invasive intervention of the condylar hyperplasia problem is achieved, overdevelopment of a hyperplasia side is inhibited, normal development of a healthy side is promoted, symmetrical development of bilateral condyles is induced, clinicalpopularization is facilitated, and the curative effect is ideal.

The invention relates to a partial dental prosthesis (1) having at least one surface (2) for forming a chewing surface of a posterior tooth (3), wherein the partial dental prosthesis (1) comprises a composite material (4) and the composite material (4) contains at least one organic binding agent (5), preferably methacrylate, and, preferably inorganic solid particles (6) as filler, wherein at least the surface (2) for forming the chewing surface, preferably the entire outwardly facing surface of the partial dental prosthesis (1), is formed at least in some regions, preferably completely, by a layer (7) that comprises fused-together solids particles (6).

The invention relates to a surgical positioner for a posterior tooth implantation hole preparation surgery, which is used for the posterior tooth implantation hole preparation surgery. The surgical positioner comprises a tooth implantation handpiece, a handpiece head, a drill bit and a positioner body, wherein the handpiece head is arranged at the front end of the tooth implantation handpiece, thedrill bit is connected to the handpiece head, the positioner is connected with the handpiece head; and the positioner comprises a tooth end, a handpiece end and cross rods, two ends of the cross rodsare respectively connected with the tooth end and the handpiece end, the handpiece end is connected with the handpiece head of the tooth implantation handpiece, and the tooth end is connected with the same tooth opposite to a surgery position. The handpiece head of the tooth implantation handpiece is connected with the same posterior tooth on the opposite side of the implant tooth by the surgicalpositioner, and the movement range of the drill bit on the handpiece head is controlled within a set range by setting the parameters of adjustors of the tooth end and the cross rods, so that the accuracy of the fossa during an implantation foramen preparation surgery is improved, and the reliability is better compared with that of bare-handed operations of doctors.

The invention discloses an assembly for assisting tooth implantation in a posterior tooth area, and belongs to the technical field of medical articles. The assembly for assisting tooth implantation inthe posterior region comprises a fixing assembly, a position-limiting assembly and a sleeve assembly, wherein the fixing assembly comprises a first clamping block and a second clamping block which are arranged oppositely, the top of the first clamping block is connected with the top of the second clamping block through an arch-shaped connecting assembly, the top of the connecting assembly is provided with a sliding hole, the position-limiting assembly comprises a clamping assembly, and a sliding block and a supporting assembly which are respectively arranged on two sides of the top of the clamping assembly, the sliding block penetrates the sliding hole and is in sliding fit with the sliding hole, the sliding block is fixedly connected with the connecting assembly, and the sleeve assemblyis connected with the clamping assembly. In the assembly for assisting tooth implantation in the posterior region, a relative position relationship between the position-limiting component and the fixing assembly is adjusted by sliding, thereby a position of the sleeve assembly is adjusted, and then a drilling position on the gum is adjusted, so that the entire assembly can meet a distance betweenteeth of different patients, and can be used repeatedly.

The invention discloses a one-piece molar-back-pushing device. The device comprises: a pair of retention pieces, wherein a pair of the retention pieces is separately fixed at the palate side of dentalcrowns of molars at the two side of the oral cavity; a connecting body which is arranged between a pair of the retention pieces in a connection mode; traction hooks, wherein a plurality of the traction hooks comprise front traction hooks and side traction hooks, the front traction hooks are arranged on the connecting body, and the side traction hooks are respectively arranged on the retention pieces; at least one micro screw which is fixed at the palate part of the oral cavity and is positioned at the far middle side of the connecting body; and at least one connecting piece, wherein each connecting piece is arranged between one micro screw and one traction hook in a connection mode. The one-piece molar-back-pushing device is simple in structure and convenient to use, can push back molarsas far as possible within the physiological limit, can effectively overcome the defects of lip inclination of anterior teeth, cheek inclination of posterior teeth, tooth rotation and the like, and reduces the implantation number of micro screws.

The invention discloses an all-porcelain tooth preparation method. The method comprises the following steps: firstly providing a seating path; then providing edge lines so that the edge lines are located at the most protuberant point of a neck edge; and then providing a seating parameter; establishing a full crown shape according to all-porcelain conditions; drawing an incising line so that: anterior: at a buccal side and a lingual side, the incising line is located above a neck-edge line for 1.5-2 mm and is parallel to the neck-edge line, and mesial and distal incising lines are located belowa contact point; posterior: at the buccal side and the lingual side, the incising line is located above the neck-edge line for 1.5-2 mm, and mesial and distal incising lines are located below the contact point; and then providing an incising parameter so that the compensation parameter of the anterior is half of an occlusal space, and the compensation parameter of the posterior is half of the occlusal space; an incising amount being 0.5 mm and re-trimming an incising crown; establishing a connector between two adjacent tooth; and finally performing handmade porcelain. The invention greatly improves the strength of dental crown, simultaneously avoids the occurrence of translucency in the case of insufficient tooth preparation, and accelerates the production efficiency of all-porcelain tooth.

The invention provides a plug-type post-core integrated crown suitable for the posterior tooth occlusal gingival restoration with a space less than 3 mm. The plug-type post-core integrated crown comprises a main body, a plug channel and a plug, wherein the main body comprises a crown part and a pulp cavity part, the crown part restores the shape and occlusal relationship of an affected tooth, andcovers and envelops a prepared body of the affected tooth, the pulp cavity part is located in a pulp cavity of the affected tooth, and matches the shape of the pulp cavity to obtain the retention force, and the plug passes through the plug channel of the main body and extends into a prepared post channel in the root canal to obtain retention. The plug-type post-core integrated crown suitable for the posterior tooth occlusal gingival restoration with a space less than 3 mm has the advantages of good retention, no need to adjust and grind a contralateral tooth, little damage, and good aesthetics, provides a good and novel restoration body used for the restoration of dental defects for such patients, and is especially suitable for the case that a posterior tooth restoration occlusal gingivalspace is too small to apply conventional crown restoration and post core + crown restoration.

The invention relates to a multifunctional odontoscope fixed on a dental handpiece in a tooth preparation process. The odontoscope is composed of a mirror part and a supporting part. The supporting part is annular and has an opening at the lower part, the front shape is consistent with the head shape of the dental handpiece, and the supporting part can be clamped on the head of the dental handpiece. The mirror part is composed of a concave mirror and a mirror handle. The concave mirror has an amplification function, and a circle of LED lamp beads are arranged around the concave mirror to provide a light source. The mirror handle is hollow, a lighting circuit and a battery bin are contained in the mirror handle, and the handle is provided with a circuit switch and a battery bin opening. The mirror part comprises an anterior tooth mirror and a posterior tooth mirror which are selected by a doctor during tooth preparation in different areas. The odontoscope is small in size, does not need to be held by a doctor, has the functions of amplification and illumination, can provide a clear visual field when the doctor operates, is beneficial to fine operation, and the working efficiency of the doctor can be improved.

The invention belongs to the field of materials, and particularly relates to a preparation method of a zirconia biological ceramic for oral cavity repair, wherein the raw materials comprise, by weight, 20-30 parts of zirconia, 10-15 parts of nanometer alumina, 10-15 parts of nanometer magnesium oxide, 10-15 parts of nanometer titanium oxide, 5-10 parts of nanometer zinc oxide, 5-10 parts of boronoxide, 5-10 parts of sodium titanate, and 5-10 parts of hydroxyapatite. According to the present invention, the prepared zirconia biological ceramic as the novel fine ceramic has advantages of good mechanical properties (fracture toughness, strength, hardness and the like), good biocompatibility, good stability, good aesthetic property, good thermal conductivity and good formability, can well solve the problem of insufficient strength and insufficient toughness of conventional all-ceramic crown materials, has mechanical properties comparable to metals, and can completely bear the chewing forceof posterior teeth.

An intraoral device having parts thereof that are positionable between the anterior teeth and an oral applicance. The intraoral device is mounted to posterior teeth to reduce or eliminate the pressure exerted on the anterior teeth by the oral appliance.

Dental apparatus, systems, and methods for providing anterior, lateral, and vertical movement, an apparatus including a posterior portion to be affixed to and supported by a posterior dental structure of a patient; and an anterior portion connected to and separable from the posterior portion, the anterior portion operable to provide anterior movement, lateral movement, and vertical movement to an anterior dental structure of the patient.

The invention discloses a maxillary occlusal pad-lip shield appliance, which comprises a base plate arranged at the front part of a hard jaw, and the front end of the base plate is provided with a reverse slope guide plate or a hyperbolic reed; the pair of maxillary occlusal pads are respectively arranged on the two sides of the base plate, are respectively positioned at the back tooth retreat positions on the two sides of the maxillary, and are connected with the back teeth through retention devices; the pair of upper lip stoppers is connected to the base plate through connecting pieces and located at vestibular sulcus positions on the two sides of the upper jaw respectively. The orthodontic device disclosed by the invention is beneficial to prevention and blocking of mild bone class III and functional class III malocclusion of patients in a tooth replacement stage and a constant-pressure early stage, and the wearing comfort of the patients is remarkably improved while the orthodontic treatment effect is realized.

The invention relates to the technical field of dental implant, in particular to a wing plate implant and an oral implant for old people. The wing plate implant comprises an implant head part and an implant neck part which are connected, the implant head part is a conical body, the outer diameter of the implant head part is gradually increased from one end far away from the implant neck part to one end close to the implant neck part, and the implant head part sequentially comprises a self-tapping threaded section, a transition section and a dense threaded section; the dense thread section is connected with the implant neck; a built-in thread is arranged between every two adjacent threads of the self-tapping thread section; the thread depth of the self-tapping thread section is greater than that of the built-in thread; a chip groove is formed in the implant head; a soft tissue protection part is arranged at one end, far away from the transition section, of the self-tapping threaded section; the surface of the soft tissue protection part is a smooth surface, and one end, far away from the self-tapping thread section, of the soft tissue protection part is a spherical surface; and an inner inclined platform is arranged on the side wall of the implant neck. The method is applied to the planting difficulty of patients with bone mass insufficiency in the maxillary posterior tooth area.

A set of artificial teeth for a denture comprises a maxillary unit and a mandibular unit. When set up in lingualised occlusion or balanced occlusion, at least one of following occurs: the palatal cusp (1a) of the maxillary posterior tooth (7a) fits into the distal fossa (1b) of the mandibular posterior tooth (8a); the palatal cusp (2a) of the maxillary posterior tooth (7b) fits into the distal fossa (2b) of the mandibular posterior tooth (8b); the mesial palatal cusp (3a) of the maxillary posterior tooth (7c) fits into the central fossa (3b) of the mandibular posterior tooth (8c); the distal palatal cusp (4a) of the maxillary posterior tooth (7c) fits onto the marginal ridge (4b) of the mandibular posterior tooth (8c); and the mesial palatal cusp (5a) of the maxillary posterior tooth (7d) fits into the central fossa (5b) of the mandibular posterior tooth (8d).

An orthodontic space closure device is provided, including a first tooth cap unit, a second tooth cap unit, and a number of elastic members. The first tooth cap unit is configured to be removably worn on the anterior teeth of a dental arch of a patient. At least one first connector is fixed on each buccal side of the first tooth cap unit. The second tooth cap unit is configured to be removably worn on the posterior teeth of the dental arch. A vertical extension part is formed on each buccal side of the second tooth cap unit, and at least one second connector is fixed on each vertical extension part. The elastic members couple the first connectors to the second connectors, thereby exerting elastic traction forces having horizontal and vertical components on the first tooth cap unit to achieve retraction and intrusion of the anterior teeth.

The invention discloses a tooth malformation correction method, which relates to the technical field of tooth correction, utilizes a novel orthodontic material combination, mainly comprises a multi-effect wire, a 3D printing casting type TPA, a constant force tension spring, a TMA wire and a five-connection spring, and comprises the following steps: aligning teeth; removing the teeth designed to be removed in the scheme after 2-3 months; maxillary TPA is manufactured, the TPA is bonded to first molars on the two sides of the maxillary, the three-dimensional positions of the molars of the maxillary are stabilized, and therefore the anchorage of posterior teeth of the maxillary is enhanced; meanwhile, the upper and lower jaws use stainless steel wires to further stabilize the dental arch form, so that the dental arch is leveled, and good vertical control is performed; under the assistance of the TPA, the tooth extraction gap is closed through double-side sliding; and adjusting the occlusion relationship. The whole orthodontic process of the tooth extraction case is efficient and simple, the chair-side operation time is shortened, and the patient is relatively relaxed.