A three-dimensional digital dental upper and lower jaw relation detection algorithm based on a cross section

Abstract

The invention discloses a three-dimensional digital dental upper and lower jaw relation detection algorithm based on a cross section. The method comprises the steps of inputting a tooth model, calculating the midpoint of each mandibular tooth model, and constructing a mandibular trajectory by connecting the midpoints of all mandibular tooth models in turn; then, according to the section determinedby the user on the mandibular trajectory line, obtaining the intersection point set of the section and the tooth model. For each pair of upper and lower tooth models, the dental line of upper and lower jaws is constructed by determining the initial point as the positional relationship of upper and lower jaws. The invention utilizes the intersection point of the cross section and the tooth model to determine the upper and lower jaw tooth line segments, which helps to realize the detection of the upper and lower jaw relationship in two dimensions, facilitates the evaluation and analysis of theupper and lower jaw relationship of the teeth in the later stage, and improves the observation accuracy to a certain extent while saving time.

Description

technical field [0001] The invention designs a three-dimensional tooth grid model detection and processing algorithm, and in particular relates to a section-based three-dimensional digitized tooth-maxillary relationship detection algorithm. Background technique [0002] In recent years, digital oral technology has developed rapidly, and invisible orthodontics has gradually become popular. The work completed by the digital treatment assistance system is apart from establishing a tooth model to provide data support for the design of the treatment plan. Usually, in order to obtain a tooth model, it is first necessary to scan the plaster model optically to obtain the three-dimensional data of the jaw, then use digital set processing technology to segment the teeth, number the teeth to facilitate later operations, and then perform a series of operations on the digital model. [0003] The occlusal relationship is also known as the occlusal relationship, that is, the cusps and soc...

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