5 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.

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.

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 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.