6 results about "Full Crown" patented technology

The invention discloses an adjustable calibration device and calibration method for assisting tooth preparation, the device comprises a calibration tray, the calibration tray is provided with a common in-place track calibration table, the calibration table is arranged on the calibration tray and can slide along the common in-place track, and the calibration table is also provided with a plurality of calibration tracks; and the calibration rod assembly comprises a fixed rod and a calibration rod which are connected with each other, and the fixed rod is vertically connected to the calibration track. The adjustable calibration device for assisting tooth preparation is simple in structure, easy to manufacture, relatively low in cost and easy to use, and can realize accurate detection of tooth preparation amount through the synergistic effect of the calibration table and the calibration rod assembly, so that insufficient preparation or excessive preparation is avoided; the shaft wall parallelism of multi-tooth preparation can be verified at the same time through combined application of a plurality of calibration tables, the consistency of in-position paths of prostheses is ensured, and the calibration table is suitable for the preparation process of fixed prostheses such as full crown, veneering and inlay restoration and can be well applied to oral medicine and biomedical engineering industries.

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.

The utility model belongs to the field of dentistry, solves the problem of eliminating a gap between adjacent teeth by using a minimally invasive method, and relates to an anti-impaction minimally invasive inlay, which comprises an inlay and an attaching surface directly connected to the side surface of the inlay, and the attaching surface is provided with a first wing and / or a second wing matched with the surface shape of the adjacent teeth. The root of the first wing and / or the root of the second wing are / is directly connected with the inlay, the first wing and the second wing are provided with gluing surfaces, the gluing surfaces are used for smearing adhesive so that the veneering can be attached to the surfaces of adjacent teeth, and the gluing surfaces are provided with glue containing grooves which are concave inwards from the surfaces. The veneer is used for eliminating the gap between the repaired decayed tooth and the adjacent tooth, so that the gap does not need to be eliminated by two connected full crowns.

This application provides a denture teaching model, comprising: a support plate with a mounting part; multiple first-tooth malformations, each with a missing crown and a missing area, the missing areas of each first-tooth malformation being different; a connector that mates with the mounting part and is detachably connected to the support plate via the mounting part; and a second-tooth malformation model, which is mounted on the connector and has a completely missing crown. This solves the problem in existing technologies where, during the process of performing full crown restoration around a second-tooth malformation model, the area between it and adjacent full-tooth models or first-tooth malformations is small, easily causing interference and affecting the wax drip restoration of the second-tooth malformation model.

The invention discloses a full-dentition anchorage spiral expansion device, and relates to the technical field of orthodontic medical instruments. Comprising a spiral expander, a left anchorage assembly and a right anchorage assembly, the orthodontic device is characterized in that each anchorage assembly comprises a groove-shaped metal full crown covering the occlusal surface, the cheek side surface and the lingual side surface of a plurality of rear teeth on the same side, an arch expansion tongue rod fixedly connected with the near-middle lingual side surface of the metal full crown on the same side, and an arch expansion cheek rod fixedly connected with the near-middle cheek side surface of the metal full crown on the same side; the device is high in retention force, high in bony expansion efficiency, good in tooth protection, high in patient comfort level and wide in application range.

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.