Three-dimensional dental arch fitting method

Abstract

The invention discloses a three-dimensional dental arc attaching method. The method comprises steps of scanning a dental body, and acquiring first point cloud data and second point cloud data of three-dimensional data of the dental body; calculating a three-dimensional space range where the data of the three-dimensional data is located; calculating initial rotation and displacement quantity of the second point cloud data so as to perform rigid body conversion; calculating multiple corresponding point pairs corresponding to the first and second point cloud data, and filtering at least one outlier pair in the multiple corresponding point pairs; and according to the corresponding point pairs of the first and second cloud point data of filtered outlier points, estimating estimated rotation and displacement quantity of the second point cloud data, carrying out another rigid body conversion, and calculating whether an error value of overlapping attachment of the first point cloud data and the second point cloud data is lower than a threshold value, thereby obtaining a dental body model corresponding to the dental body. According to the invention, manufacturing of a tooth die is facilitated and the method is especially suitable for other types of three-dimensional scene reconstruction technology.

Description

technical field [0001] The invention relates to a bonding method, in particular to a three-dimensional dental arch bonding method. Background technique [0002] Traditionally, making a tooth model corresponding to a tooth requires nearly 28 steps such as mold turning, trimming, casting, porcelain stacking, and sintering. [0003] In order to solve the aforementioned problems, the production technology of the existing tooth mold has entered into semi-digitalization. After the initial tooth mold is produced, the initial tooth mold is scanned, and then software (such as CAD / CAM) is used to carry out digital tooth analysis. Mold editing and repairing, and finally using the tooth carving system to process, which improves the production efficiency and accuracy of the tooth mold. [0004] However, in the era of full digitalization, semi-digital tooth mold production technology has been gradually eliminated, such as figure 1 As shown, the models of various objects 3 to be measured...

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Problems solved by technology

[0005] However, in terms of intraoral tooth scanning, due to the limited oral space and the limited visual range of the scanner, scanning and image acquisition must be performed in batches, and it is impossible to obtain 3D data of the entire tooth body, resulting in the production of a corresponding full-mouth tooth Difficulty of body tooth mold

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