30 results about "Crown repair" patented technology

The image processing system is applied to dentistry, for example, and performs photography of the teeth of a patient while causing a plurality of illumination light LEDs of different wavelengths to emit light by means of a photography device when producing a crown repair or denture of the patient, whereby image data are acquired. The image data are transmitted to a dental filing system constituting a processing device where color reproduction data are determined through computation. In addition, color reproduction data are transmitted to the dental technician's office via a public switched network. Therefore, a repair material compound ratio calculation database is searched and the compound data for a material that matches the hue of the patient's teeth are found, whereby a crown repair or denture or the like that very closely matches the color of the patient's teeth is produced.

The invention relates to a preparation method of a neck and a shoulder of a tooth during the tooth full crown repair process, the specific steps are that: a shoulder preparation special machine needle which is provided with a columnar base part, a columnar middle part and a spherical or short columnar top part with sands is adopted, the radius of the top part of the special machine needle is 1.2 to 1.4mm, the radius of the middle part is 0.3mm while the length is 8 to 10mm; the radius of the base part is 1mm while the length is 8 to 10mm; the base part of the special machine needle is arranged on a mobile phone to rotate the machine needle, the top part of the machine needle is arranged on a tooth tissue which is near to a gum and can move along the outline of the gum, the middle part of the machine needle is parallel or nearly parallel to the surface of the tooth, when the middle part of the machine needle is tightly affixed with the tooth surface, the shoulder with the depth of 0.9 to 1.1mm is formed at the edge of the tooth, thus completing the preparation of the tooth edge at the labial side / buccal side. The method can ensure the accurate preparation amount of the neck and the shoulder of the tooth during the full crown repair treatment process, the full crown and the tooth have great marginal adaptation, and the full crown has high strength and pleasing appearance after the repair, which is conductive to the oral health. The method further has simple operation and time conservation, which is not easy to damage the periodontal tissue during the preparation process.

The invention provides a deep generative network assisted functional full-crown restoration form generation method, and relates to the field of computer-assisted biomedical engineering, and the method comprises the following steps: obtaining and processing three-dimensional data of a tooth jaw where a defective tooth is located, and obtaining a jaw space position of the defective tooth in the tooth jaw; reconstructing the basic form and the detail form of the occlusal surface of the defective tooth according to the jaw space position of the defective tooth in combination with a deep generative network model; reconstructing a full-crown restoration of the defective tooth according to the shape of the reconstructed occlusal surface of the defective tooth in combination with a restoration bonding layer structure and a middle connector, wherein when the basic form of the occlusal surface is reconstructed, a front-end network of the deep network model adopts the Wassertein distance as difference measurement; generating an occlusal surface basic form meeting a jaw space position relation. The confrontation loss promotes the distribution of a generated image to be close to a real image, and a perceptual feature loss function is introduced to punish a generated unreal occlusal surface image, so that the occlusal surface form closer to a target dental crown is reconstructed.

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 relates to the technical field of dental post-core crown repair, and particularly discloses a machinable high-light-transmittance fiber resin composite material for dental post-core crown repair and a preparation method. The high-light-transmittance fiber resin composite material comprises fibers and a resin matrix; the fibers have high X-ray radiation resistance, the refractive index is 1.54-1.6, and the resin matrix comprises epoxy resin, an epoxy curing agent, an accelerant, a release agent, an antioxidant and filler; and the diameter of the high-light-transmission fiber resin composite material is 10-100 mm. The preparation method comprises the steps of fiber carding, fiber infiltration and pultrusion. The high-light-transmission fiber resin composite material has strong X-ray radiation resistance and high light transmission, the size of the high-light-transmission fiber resin composite material can be used for more CAD / CAM systems; in addition, the fiber resin composite material has good elastic modulus, bending strength, biocompatibility and aesthetic performance.

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 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 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 discloses a method for digitally generating the external surface of a full crown restoration. The standard crown model is edited; the edited standard crown model is dynamically cut; according to the cut standard crown model, a transitional mesh surface is generated; according to the transitional mesh surface, the outer surface is specially deformed to obtain The outer surface of a full crown restoration. The invention ensures that the standard crown boundary does not interfere with the inner surface boundary, creates a good boundary position relationship for the transition between the standard crown and the inner surface, greatly improves the generation quality of the transition surface, and ensures the design obtained The full crown restoration can retain most of the standard dental and maxillofacial shapes while meeting the specific support strength. The invention can be widely used in the field of denture restoration.

The invention discloses a method for reducing formation of residual binder (residual excess cement) in a bonding retention planting restoration process. According to the method, a CAD system is adopted to design a personalized abutment and a full-crown prosthesis, meanwhile, a pre-bonded abutment is obtained through digital back-cutting, the personalized abutment does not need to be repeatedly scanned, the steps can be simplified, and the precision can be improved. According to the pre-bonded abutment which is accurately manufactured in a digitalized mode, a 30-100-micrometer pre-bonded gap (every 10 micrometers) can be reserved in a precise gradient mode according to the performance of the binder, the precise binder volume needed by final full-crown bonding can be adjusted, and therefore balance of bonding retention and bonding agent overflowing is achieved; and after the overflowing binder is removed through in-vitro pre-bonding, the whole crown is quickly positioned on the individualized abutment in a mouth until preliminary hardening is realized, and excessive cement around the crown is removed, so that excessive cement residue is avoided.

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 discloses an intraoral scanning rod for restoration of a dental post core or a post core crown. The intraoral scanning rod comprises a rod body that is arranged in a root groove of a tooth; and a core part that is arranged on the upper end of the rod body. The diameter of the core part is larger than the diameter of the rod body. The invention also discloses a method for manufacturing the intraoral scanning rod used for restoration of dental post core or post core crown, and the method comprises steps of scanning a drill to obtain 3D data and then applying the 3D data in manufacturing with cutting technology. Namely, the digital technology is applied in dental restoration to solve the casting defects that is difficult to resolve in traditional casting technology, and also solve the limitation that some materials can only be processed by casting technology.

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.

The invention discloses a fibrous tape prosthesis for a maxillary premolar penetrating wedge-shaped defect. The fibrous tape prosthetic for a maxillary premolar penetrating wedge-shaped defect includes a fibrous tape and a wedge-shaped composite resin filling body. The fibrous tapes are 1-2, The length of the fibrous band is less than 6.0-7.5mm of the tooth length, the width is 1.0-2.0mm, and the thickness is 1.0mm-1.5mm. The depth from the tip to the bottom of the wedge-shaped composite resin filling body is 1 / 2-2 / 3 of the buccal-lingual diameter of the tooth neck, the width is from the mesio-proximal surface to the distal-proximate surface of the maxillary premolars, and the thickness is 3.0-5.0mm , the wedge-shaped composite resin filling body wraps around the 1 / 3 to middle 1 / 3 junction of the single fiber belt. The fibrous tape prosthesis of the present invention can prevent the neck of maxillary premolars with penetrating wedge-shaped defects from being fractured, reduce the excessive preparation of teeth after full crown restoration, and retain more of the maxillary premolars with penetrating wedge-shaped defects dental tissue.

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.