30 results about "Crown repair" patented technology

The invention discloses an absorbable polylactic acid film for enhancing airtightness of an absorbable root canal post of a deciduous tooth. The absorbable polylactic acid film is prepared by dissolving the following raw materials in parts by weight: 0.5-1.5 parts of polylactic acid, and 5-15 parts of solvent. The absorbable polylactic acid film and the absorbable root canal post are made of the same material, and the absorbable polylactic acid film has no influence on human dental follicle cells, deciduous periodontal ligament cells and deciduous dental pulp cells, cannot result in apoptosis of the human dental follicle cells, is nontoxic, can effectively control the effective strength of the absorbable root canal post, can recover functions and a shape of the deciduous tooth for a long time to the greatest extent, and does not influence normal replacement of deciduous permanent teeth. A preparation method of the film is simple and practicable, and can be used for manufacturing during clinical application. The film is used for residual root and residual crown repair of the deciduous tooth, a crown restoration is good in retention postoperatively, and the film meets the clinical requirement of pediatric dentistry.

The invention provides a manufacturing method of a whole-wrapped type extra-thin porcelain veneer. The method comprises specific steps of (1) preparing a tooth model from a tooth body prepared in a minimally invasive manner; (2) preparing a wax pattern of the whole-wrapped type extra-thin porcelain veneer according to the tooth model; (3) according to the wax pattern in the step (2), mounting a sprue on the wax pattern, and performing embedment casting treatment on porcelain blocks so as to obtain a prosthesis, wherein the material of the porcelain blocks in the step (3) is IPS e.max Press porcelain blocks; (4) removing the embedment from the prosthesis, and removing a reaction layer; and (5) polishing the prosthesis, and finally performing glazing and sintering so as to obtain preparation of the porcelain veneer. The thinnest porcelain veneer prepared by the method can reach 0.2mm, the porcelain veneer is high in pressure resistance, is jointed to teeth, is not liable to molder, has good esthetic properties, and can wholly wrap a tooth large in tooth defects, and the problem that conventional tooth crown repair cannot reach minimally invasive esthetics due to large tooth defect quantity can be solved.

The invention provides a full-digital design method for synchronously designing a tooth pile core and a crown by a computer. The method comprises the following steps of: synchronously completing pile path preparation and full-crown abutment tooth preparation for an affected tooth to obtain a silicone rubber impression including the pile path of the affected tooth and the full-crown abutment tooth form; modeling an impression scanning piece; designing a personalized pile core, and cutting and manufacturing a digital pile core by referring to an STL file; changing the gap of the pile core binder to a negative value at the beginning of the pile core design, so that the designed and output new pile core can smoothly penetrate into the digital model of the remaining tooth body, thereby fitting the new pile core and the remaining tooth body into a whole; and designing a full crown to achieve full-digital synchronous design of tooth pile cores and crowns. According to the method, the full crown can be immediately designed on the basis of the digital pile core after the digital pile core is designed by the computer, the pile core, the tooth body and the full crown are tightly combined at the computer level, the defects of an existing digital pile core technology are overcome, and the purposes of optimizing design steps, shortening the pile core and crown repair period of a patient and simplifying the manufacturing process of a technician are achieved.

The invention discloses a method for manufacturing a dental full-crown prosthesis with optimized material elastic modulus distribution, which comprises the following steps of: A, constructing a model: after the tooth of a patient is prepared, scanning in the mouth to obtain digital impression data, according to related anatomical sizes, constructing a three-dimensional model with a tooth preparation body and 4-8 layers of layered full-crown prostheses for jaw teeth and occlusion relations; b, further importing the layered full-crown prosthesis and tooth preparation model into finite element analysis software, setting corresponding parameters, and optimizing and establishing elastic modulus distribution of 4-8 layers of full-crown models; c, according to the elasticity modulus distribution data, obtained through optimization, of the 4-8-layer full-crown model, preparing the dental full-crown prosthesis with individualized and optimized elasticity modulus distribution by 3D printing. The service life of the full-crown restoration can be effectively prolonged, clinical complications such as ceramic cracking and fracture are reduced, and the elasticity modulus distribution of the full-crown restoration is simpler than that of a full-layer gradual-change functionally graded material in the aspect of manufacturing.

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.

The invention discloses a method for intelligently and digitally manufacturing a substituted crown, oral cavity data of a patient and jaw bone and tooth root data are quickly obtained in a 3D scanning mode, the data are quickly integrated and matched with design software in a cloud uploading mode, a designer can quickly design on the design software according to cloud data, docking with a clinician is implemented at the cloud end, a design scheme and a treatment scheme are rapidly obtained, meanwhile, the substituted crown installation process is repeatedly simulated, and the discomfort of the clinician when the substituted crown is worn by a patient is reduced.

The invention relates to a pure titanium metal dental crown, a restoration body and a processing method thereof, the pure titanium metal dental crown comprises a dental crown body made of pure titanium, an occlusal surface of the dental crown body is provided with a plurality of pits, the distance between the circle centers of adjacent pits is greater than the diameter of each pit, and the pure titanium metal dental crown has long service life.

The invention provides a gingival radian shaping device and a preparation method thereof. The device comprises two connecting units used for connecting alveolar bones and a shaping complex unit used for gingival radian shaping, wherein the shaping complex unit is installed between the two connecting units; the connecting unit comprises one or more first crown prostheses matched with missing teeth in the multi-tooth missing area, an implant and a repairing base for connecting the first crown prostheses and the implant; the shaping complex unit comprises a pressure-bearing part of which the left end and the right end are respectively and fixedly connected with the adjacent first crown prosthesis, pressure heads for pushing gingivae and an elastic connecting part for connecting the pressure heads and the pressure-bearing part, and the pressure heads are mounted above the pressure-bearing part and are arranged in one-to-one correspondence with the gingivae corresponding to missing teeth; the upper surface of each pressure head comprises a pushing surface in contact with the gingiva, and the pushing surface is a convex cambered surface which is complementary with the cambered surface of the gingiva of the same-name tooth on the opposite side of the missing tooth corresponding to the pushing surface. According to the device, gingival shaping is carried out on a patient with tooth loss in an anterior tooth beauty area through quantitative pressure application.

The invention discloses a manufacturing method and a guide plate for post-core shaping and repairing of residual root and residual crown, and relates to the technical field of oral auxiliary medical equipment and preparation thereof. The method includes: A1. Model and CBCT jaw model; A2. Adjust the digital model of the upper and lower jaws to obtain a digital model of crown restoration; A3. Reduce the digital model of crown restoration according to a predetermined value to obtain a digital model of resin core; A4. Register the digital model of resin core and CBCT For the jaw model, obtain the digital model of the post and core shaping repair guide; A5. Make the digital model of the post and core shaping repair guide into an entity; first obtain the full crown restoration after crown restoration, and then proceed with the full crown restoration as the guide. Reduce and obtain a digital model of the resin core, which not only reserves enough space for crown restoration, but also reduces the waste of resin materials and the time for clinicians to trim the resin core.

The invention relates to the technical field of tooth restoration, in particular to a tooth neck shoulder preparation method in the tooth full-crown repair process and a special bur therefor. According to the technical scheme, the method comprises the following preparation steps that S1, a used bur is subjected to surface disinfection by soaking for 20-30 min, the texture part of the bur is cleaned for 1-5 times with a toothbrush with a small head after soaking, and finally the bur is washed with clear water; S2, the used bur is placed in a high-low speed handpiece used by a doctor, and installed, and then the bur waits for use; and S3, if the neck of the tongue side or the adjacent face takes metal as the crown edge, the neck edge can be prepared into a feather shape, a groove shape or a right-angle inclined plane shape, and if the lip-cheek side or the full crown edge is porcelain, the tooth neck edge should be prepared into a right angle or a 135-degree concave surface. According to the invention, the strength and the beauty of the neck edge porcelain can be ensured, the accuracy and the suitability of the edge of the restoration body are also improved, and the advantages of small gingival irritation of the upper gingival edge and the beauty of the lower gingival edge are also integrated.

A porcelain crown with an adjustable cantilever is characterized in that the porcelain crown is composed of a porcelain full crown, accessories (an annular belt, a baffle, a spring and a magnet), a receiving slot and a small wrench, all the accessories are assembled into a whole and then fused and attached to the cheek-tongue side of the porcelain crown, then the porcelain crown is sleeved on a prepared abutment tooth in a human body, the annular belt is divided into an inner annular belt and an outer annular belt, and the inner annular belt and the outer annular belt are connected and fixed; a spring is installed between the baffle and the inner ring belt, and a disengaging limiting mechanism is installed between the baffle and the inner ring belt and used for limiting the baffle to be disengaged from the inner ring belt in the sliding direction. And a separation limiting mechanism is also mounted at the contact part of the baffle plate and the receiving slot, and is used for limiting the baffle plate to be separated from the receiving slot in the sliding direction. The baffle is used for shielding the black triangle after being in place to prevent food from being impacted. The porcelain tooth with the adjustable cantilever solves the problem of horizontal food impaction caused by a black triangle after a porcelain crown of a patient is repaired in the prior art.

The invention discloses a manufacturing method for a color masking veneer in an oral crown. The color masking veneer is manufactured on the basis of a digital optical scanner and denture design software and by utilizing a 3D printing technology; the color masking veneer is made of a low-transmittance ceramic material; and a veneer range of a digital abutment model is designed, positioning is conducted through 3D printing technology, then crystallizing is carried out, and then the color masking veneer is put in place on a prepared abutment tooth body to shield a discolored tooth body, so full-crown repair via a high-transmittance all-ceramic material is facilitated. According to the veneer manufactured by the method, the clinical application range of high-permeability ceramic materials such as glass ceramic is expanded, the strength of restoration is enhanced, and the doctor-seeing experience and satisfaction of a patient are improved.

The invention discloses a crown repair adjacent gap dynamometer for a stomatology department. The crown repair adjacent gap dynamometer comprises a bottom plate, a lifting unit, a rotating unit and acontroller. The controller is arranged in the middle of the front side surface of the bottom plate. The lifting unit comprises a motor, a fixed block, a lead screw, a movable block and a mounting plate. The bottom end of the fixed block is connected with the middle part of the upper surface of the bottom plate. A groove is formed in the front side of the fixed block. A lead screw is rotationally connected with the inside groove. The bottom end of the motor is connected with the top end of a fixed block. An output shaft of the motor is connected with the top end of the lead screw. The movable block is slidably connected with the groove in the front side of the fixed block. A screw hole in the side of the movable block is in threaded connection with the lead screw. The front side of the movable block is connected with the middle of the rear side of the mounting plate. A rotating unit is arranged on the front side of the mounting plate. A fixed unit is arranged on the top end of the mounting plate. The crown repair adjacent gap dynamometer for the stomatology department has the advantages of simple structure, convenient use and accurate measurement.