3 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 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.