A Restoration Algorithm for Single Teeth Mesh Model

Abstract

The invention discloses a repairing algorithm for a single tooth mesh model. The repairing algorithm comprises the following steps: inputting the single tooth mesh model missing part of the side edgeof a tooth and a complete tooth root; fixing the axis of the tooth mesh model; expanding the tooth mesh model by using the local coordinates of the tooth, obtaining a repairing boundary point set of the tooth model; processing the repairing boundary point set through a three-dimensional point cloud reconstruction algorithm to obtain a preliminary repairing model of the tooth; and repairing the preliminary repairing model of the tooth according to the original tooth mesh model. Compared with the traditional manual repairing algorithm, the tooth model is fully automatically repaired, the production efficiency is improved, and the noise information of the input model is better filtered.

Description

technical field

[0001] The invention belongs to the technical field of grid model data processing and model repair, and in particular relates to a repair algorithm of a single tooth grid model. Background technique

[0002] In recent years, digital oral technology has developed rapidly and is widely used in orthodontics, implants and other fields. Among them, it is the first and important step to obtain a digital model of the patient's jaw by using a box-type or intraoral scanner. However, due to limitations of the existing scanning technology, the information of the adjacent surfaces between adjacent teeth and tooth roots and other areas where light cannot penetrate cannot be obtained directly through scanning, so the scanned model needs to be repaired. Most of the existing tooth model restoration algorithms need to manually determine the repair area, manually adjust the curvature of the repair plane, etc., which affects the production efficiency. Therefore, a more automat...

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