Automatic detection, generation and/or correction of tooth features in digital models

Abstract

Methods and systems for marking and / or correcting edge lines and / or other features of a dental part are described. In one example, a three-dimensional model of a dental part is generated from intraoral scan data of the dental part, the three-dimensional model including a representation of a preliminary tooth. An image of the prepared tooth is received or generated, the image including the height map. Data from an image is processed using a trained machine learning model that has been trained to identify edge lines of a prepared tooth, where the trained machine learning model outputs a probability map that includes, for each pixel in the image, a probability that the pixel depicts an edge line. The three-dimensional model of the tooth part is then updated by marking edge lines on the representation of the prepared tooth based on the probabilistic map.

Description

technical field [0001] Embodiments of the present disclosure relate to the field of dentistry, and in particular to the use of machine learning and other processing techniques to identify, generate and / or correct edge lines and / or other dental features in digital models. Background technique [0002] For restorative dental work such as crowns and bridges, an intraoral scanner may be used to generate one or more intraoral scans of prepared teeth and / or surrounding teeth on a patient's dental arch. In the case of a subgingival preparation, the gingiva covers at least a portion of the margin line (also referred to herein as the finish line) and is retracted to fully expose the margin line. For this reason, intraoral scans are usually created after a doctor places a tooth retraction line (also known as a packing cord or retraction cord) under the gum around the prepared tooth, then removes the retraction cord, briefly exposing the subgingival margin. The process of packing the ...

AI Technical Summary

Problems solved by technology

If the guess is incorrect about the true geometry of the patient's prepared tooth, the process is repeated, resulting in additional work by the dentist and / or laboratory

Furthermore, the process of manually modifying the virtual 3D model or the physical 3D model is a time-consuming task performed by experienced laboratory technicians, which increases the overall cost of the dental prosthesis and increases the time it takes to manufacture the dental prosthesis

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