15 results about "Crown repair" patented technology

The invention aims to provide a biodegradable deciduous tooth repairing post-core material and a preparation method thereof. Deciduous tooth caries (Deciduous tooth decay) and residual roots and crowns of deciduous teeth caused by trauma of the deciduous teeth are clinically common symptoms. A clinically common permanent tooth root pipe pile core system affects replacement of deciduous permanent teeth due to non-absorbability and cannot meet the performance requirement for repairing residual roots and crowns of the deciduous teeth. The time limit and performance requirements of clinical application are fully considered. The polylactic acid is subjected to toughening modification by a block polymerization method, so that the toughness and strength of the polylactic acid are improved, and the elasticity modulus of the polylactic acid and the elasticity modulus of deciduous teeth are within the same quantity range. According to the invention, tooth growth-promoting raw materials such as hydroxyapatite are synthesized into the post-core material, so that the post-core material has an obvious effect in the aspects of anti-caries repair. Experiments prove that the product provided by the invention has good biocompatibility, and is degradable and absorbable.

Provided is a method for evaluating the fixed state of a fixed dental crown restoration, the method including: applying elastic wave stimulation to a fixed dental crown restoration; acquiring, as a time-history waveform, a response waveform of the fixed dental crown restoration receiving the elastic wave stimulation; evaluating frequency response characteristics from the acquired time-history waveform; inputting the frequency response characteristics to a trained anomaly detection model to obtain an anomaly score as an inference result; and determining a fixed state of the fixed dental crown restoration from the anomaly score. The anomaly score relates to a state in which the fixed dental crown restoration is fixed to an abutment tooth or an implant body.

The application discloses an enamel-like composite crown restoration material and a preparation method and application thereof, relates to the field of ceramic oral restoration, and relates to a restoration material which comprises a composite base, a net-like wrapping structure and arginine, wherein the net-like wrapping structure is coated on the outer side of the composite base, and the arginine is grafted on the net-like wrapping structure; and the composite base comprises a TZP support and a polyaryletherketone. The application provides the composite base which is matched with the mechanical properties of tooth enamel, and successfully grafts the arginine on the outer side of the composite base by means of the net-like wrapping structure, so that the arginine is stably grafted on the special interface of the organic-inorganic composite material, and the special target surface modification of the organic-inorganic material is realized.

The application discloses a kind of crown prosthesis retained form cutting method and device, wherein the method includes: import prosthesis model, occlusal model and minimum thickness layer model, and based on prosthesis model, occlusal model and minimum thickness layer model are calculated, obtain complete deformation region;Based on complete deformation region, surface morphology weakening treatment is carried out to prosthesis model, obtain prosthesis model after surface morphology weakening treatment;Calculate the first collision deformation region of minimum thickness layer model and the prosthesis model and the second collision deformation region of occlusal model and the prosthesis model, and based on the first collision deformation region and the second collision deformation region, deformation processing is carried out, and deformation processing result is obtained;Deformation processing result is detected, and it is judged whether there is collision area.The application eliminates the collision area between models by deforming the prosthesis model, so as to ensure the minimum thickness and initial contour of the prosthesis, and improve the deformation quality.

The invention discloses an enamel-imitated composite crown repairing material and a preparation method and application thereof, and relates to the field of ceramic oral cavity repairing, the repairing material comprises a composite matrix, a net-shaped wrapping structure and arginine, the net-shaped wrapping structure wraps the outer side of the composite matrix, and the arginine is grafted to the net-shaped wrapping structure; the composite matrix comprises a TZP bracket and polyaryletherketone. According to the invention, the composite matrix matched with the enamel in mechanical property is provided, and arginine is successfully and stably grafted on the outer side of the composite matrix by virtue of a net-shaped wrapping structure, so that the purposes of stably grafting arginine on a special interface of an organic-inorganic composite material and realizing special target surface modification of the organic-inorganic material are achieved.

The invention provides a periodontal disease tooth root regeneration treatment method and a multi-modal implant system, and relates to the technical field of stomatology and tissue engineering, and the method comprises the following steps: S1, minimally invasive extraction of autologous hDPSCs, CD146 + sorting, co-culture of the autologous hDPSCs, a gradient scaffold and growth factor-loaded microspheres in a dynamic culture device to form an ECM membrane-scaffold complex; s2, minimally invasive implantation of the complex under the guidance of a navigation guide plate, wherein the initial torsion resistance of the magnesium alloy retention nail is larger than or equal to 25 N.cm; s3, zirconium oxide all-ceramic crown repair is carried out 6 months after operation, an adhesive contains 20wt% of nano ZrO, dynamic culture parameters are as follows: 1Hz compressive strain, a double-channel perfusion flow rate ratio is (1: 2)-(1: 4), a culture medium contains 25-50ng / mL of BMP-2 and 5-8ng / mL of USAG-1, and the gradient scaffold has a three-layer pore structure: the porosity of an alveolar bone contact layer is 85 + / -3%. According to the system, a functional periodontal membrane is formed, and collagen fiber bundles are vertically inserted into cementum / bone tissue; the vascularization time is shortened by 50%, and the CD31 + vascular density reaches 28.3 + / -4.7 pieces / mm < 2 > in 14 days after operation.

The invention discloses a telescopic crown repair false tooth, and relates to the technical field of oral medical technologies. The dental implant comprises a gingiva, an abutment, a first-layer sleeve crown, a second-layer sleeve crown and a gap, the abutment is arranged at the top of the gingiva, the first-layer sleeve crown is fixedly bonded to the side of the abutment, the second-layer sleeve crown is movably connected to the side of the first-layer sleeve crown, and the gap exists between the first-layer sleeve crown and the second-layer sleeve crown. The inner side face of the first-layer sleeve crown is designed according to the shape of the side portion of the abutment tooth and adheres to the side portion of the abutment tooth to be fixed, and the side portion of the first-layer sleeve crown and the inner side face of the second-layer sleeve crown are precisely polished, so that the side portion of the first-layer sleeve crown and the inner side face of the second-layer sleeve crown are mirror image smooth faces. The first layer and the second layer of the telescopic crown generate adsorption force through mirror surface friction, and the movable denture is comfortably worn in the oral cavity of a patient, so that the use comfort of a wearer is effectively improved.

The invention provides an oral implant data acquisition method and a restoration generation method.The oral implant data acquisition method comprises the steps that oral CBCT data, oral scanning data and dynamic implant navigation information are acquired; performing data fusion on the oral cavity CBCT data and the oral scanning data, and obtaining a conversion matrix between the oral cavity CBCT data and the oral scanning data based on a fusion result; based on the dynamic implantation navigation information, obtaining a relative pose of a virtual implant model in the oral cavity CBCT data; based on the conversion matrix and the relative pose, pose information of the virtual implant model in the oral scanning data is obtained through calculation. The implant upper crown restoration is designed and manufactured according to the obtained fusion data including the implant body posture information and the gingival height, shape and position of the tooth-missing area, and the purposes of low cost, fast process and high precision are achieved.

This invention relates to the field of full crown restoration technology, and discloses a method and system for extracting the edge lines of a full crown restoration preparation based on deep learning. The method includes: acquiring three-dimensional mesh data of the test subject's preparation; inputting the three-dimensional mesh data of the test subject's preparation into a three-dimensional mesh semantic segmentation network model to obtain the three-dimensional mesh segmentation result of the test subject's preparation; preprocessing the three-dimensional mesh segmentation result of the preparation, and smoothing the preprocessed three-dimensional mesh segmentation result to obtain an accurate three-dimensional mesh segmentation result; calculating the segmentation edge based on the accurate three-dimensional mesh segmentation result to obtain a rough edge line of the preparation; and performing smoothing and projection processing on the rough edge line of the preparation to obtain a smooth edge line of the preparation on the three-dimensional mesh. This invention can assist in annotating the edge lines of the preparation, saving restoration design and fabrication time, and reducing annotation errors caused by subjective factors.

To provide an implant having a shape completely different from conventional implants, which is adapted to each implantation site. [Solution] An implant 100 used in place of a maxillary molar, which is formed by integrating three separate root equivalent portions 121, 122, 123 with one crown prosthesis portion 150 connected to the base end of the root equivalent portions, and has an abutment 170 attached. One or two vertical grooves 135 of a predetermined depth are formed on the inner surface of each root equivalent portion, extending from the tip of the root toward the base end of the root over a length that is approximately one-third of the length of each root equivalent portion, and on the surface area excluding a predetermined area on the inside of each root equivalent portion, horizontal grooves 111, 112, 131 of a predetermined depth are formed in a row at predetermined intervals from the underside of the cervical equivalent region formed on the abutment attachment side of the crown prosthesis toward the root tip of each root equivalent portion.

This utility model discloses a lateral placement implant restoration structure, including a crown. A first limiting groove is longitudinally opened through the center of the front of the crown, and several second limiting grooves are symmetrically arranged through both sides of the front of the crown. An abutment is installed inside the crown, including an upper abutment body, a middle abutment body fixedly arranged at the bottom of the upper abutment body, and a lower abutment body fixedly arranged at the bottom of the middle abutment body. The upper abutment body is placed inside the crown and is locked in the first limiting groove. Several retention blocks are symmetrically fixedly arranged on both sides of the upper abutment body and are locked in the second limiting grooves. An implant is installed at the bottom of the abutment. The crown of this utility model cooperates with the abutment through lateral placement. Compared with the traditional implant-bonded crown restoration operation, this system does not require the use of adhesive, avoiding the situation where adhesive is squeezed out and solidified between the crown and the abutment, and remains under the gum line and is difficult to clean.

The utility model discloses an implant single-sleeve crown repairing device, and belongs to the technical field of implant denture repairing. The device comprises a composite abutment and a sleeve outer crown, the composite abutment comprises a boss inner crown composed of an upper circular truncated cone section and a lower retention section which are connected up and down, and the sleeve outer crown is sleeved on the boss inner crown and is in retention connection with the boss inner crown through Morse taper. The device is mainly composed of the sleeve outer crown and the boss inner crown, the number of accessories is small, the structure is simple, the technical sensitivity to doctors is reduced, a common insertion path can be easily obtained, time and labor are saved during operation, and therefore the clinical process is accelerated, time is saved, accuracy is improved, and missing teeth of a patient can be simply and rapidly repaired. The sleeve outer crown and the boss inner crown are fixedly connected through the Morse taper, the retention effect is good, the retention force is sufficient, and the sleeve can be taken down by a patient only with force when the sleeve needs to be taken down, so that oral hygiene and cleaning of the patient are facilitated, periodontal health is protected, and the long-term success effect is achieved.

The invention discloses a novel dental restoration composition which is prepared by taking a UDMA-TEGDMA-bisphenol A diglycidyl methacrylate copolymer as a matrix, combining silicon dioxide, dental glass fillers (SiO2-B2O3, Al2O3-Na2O and ZrO2), a silane coupling agent, a photoinitiator and a pigment according to a specific proportion and optimizing components and a process. The mechanical strength, the biocompatibility and the stability after curing of the material are obviously improved. The composition is suitable for the fields of dental caries filling, dental crown repairing and the like, and has high wear resistance, low water absorption and aesthetic suitability.

The application relates to a manufacturing method of an integrated post core based on a single tooth impression, an integrated post core and a post core system, and relates to the technical field of dental post core repair. The method can solve the problems of poor post core positioning and poor suitability. The method comprises the following steps: performing tooth preparation on a diseased tooth according to the requirements of full crown repair, and performing root canal post channel preparation on the diseased tooth by using a reaming drill; performing a single tooth impression on the diseased tooth to obtain a post core impression of the diseased tooth, scanning the post core impression of the diseased tooth to obtain a digital single tooth impression, and then performing intraoral dentition scanning on the patient; performing digital design and processing and manufacturing of the integrated post core according to the digital single tooth impression and the intraoral dentition scanning result, to obtain an initial integrated post core; performing model trial fitting and adjustment on the initial integrated post core to obtain a target integrated post core, and performing clinical trial fitting and adhesion on the target integrated post core.

The application provides an oral implant data acquisition method and a prosthesis generation method, wherein the oral implant data acquisition method comprises: acquiring oral CBCT data, oral scanning data and dynamic implant navigation information; performing data fusion on the oral CBCT data and the oral scanning data, and obtaining a conversion matrix between the oral CBCT data and the oral scanning data based on a fusion result; acquiring a relative pose of a virtual implant model in the oral CBCT data based on the dynamic implant navigation information; and calculating and obtaining pose information of the virtual implant model in the oral scanning data based on the conversion matrix and the relative pose. The implant upper crown prosthesis is designed and manufactured by using the fusion data obtained above, which contains implant pose information, edentulous area gum height, shape and position, so that the purposes of low cost, fast process and high precision are achieved.