Scanning device and scanning method

Abstract

The invention discloses a scanning device and a scanning method, and relates to the technical field of oral medicine, the scanning device comprises an image acquisition module, a parameter calibration module and an image processing module; the image acquisition module comprises a binocular vision measurement device, a reflector group and a scanning rod; the binocular vision measurement device is used for shooting images of the surface of the scanning rod, the reflector group, an intraoral alveolar ridge and teeth covered by the projection grating; the reflector group comprises at least one mirror surface, and the mirror surfaces are different in size and are respectively used for detecting buccal sides, lingual sides / palatal sides and mouth bases / palate sides of left and right dental arches; the parameter calibration module is used for calibrating the binocular vision measurement device; and the image processing module is used for unifying the coordinate system of the binocular vision measurement device based on calibration and then carrying out dense three-dimensional reconstruction. According to the method, the position of the scanning body is determined in a mark point identification mode, alveolar ridge mucosa data can be directly obtained for splicing, and the edentulous multi-tooth implantation digital impression can be accurately obtained through one-time scanning.

Description

technical field [0001] The invention relates to the technical field of stomatology, in particular to a scanning device and a scanning method. Background technique [0002] At present, the basic principle of the 3D scanning system in the main orifice is to obtain all the surface data of the scanned object through continuous overlapping and splicing of small-area single-field scanning data. Depending on the software algorithm, tens or hundreds of thousands of measurements per inch are required to stitch the two-dimensional images into the three-dimensional shape of the object. However, the single scanning area of ​​the intraoral scanner is small, and the number of software splicing is too many during continuous multi-tooth scanning, resulting in low efficiency and large errors. Simple three-dimensional stitching requires a lot of calculations, and the scanning operation is prone to errors and interruptions, and the cumulative error is relatively large. The actual environment...

AI Technical Summary

Problems solved by technology

At the same time, patients with dentition defects and edentulous patients lack teeth as splicing features and only have a relatively flat mucosal shape, making data splicing difficult, which has always been a difficult area in the application of oral scans.

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