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Extraction method of tooth three-dimensional point cloud data surface pit and fissure region

A tooth surface, three-dimensional point cloud technology, applied in image data processing, instruments, calculations, etc., can solve problems such as unfavorable in-body tooth fissure morphology, evaluation and analysis, etc., to achieve a simple and fast acquisition method, fast processing speed, and high precision. Effect

Active Publication Date: 2020-02-21
HANGZHOU DIANZI UNIV
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Problems solved by technology

Scholars at home and abroad have been committed to grading the complex pit and fissure morphology. Most of them use isolated tooth slices to observe the pit and fissure, which is not conducive to the evaluation and analysis of the pit and fissure morphology of in-body teeth.
With the continuous development of optical technology, the use of optical imaging devices can effectively and accurately obtain high-precision three-dimensional models of oral teeth. Research on link between structure and caries is blank

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  • Extraction method of tooth three-dimensional point cloud data surface pit and fissure region
  • Extraction method of tooth three-dimensional point cloud data surface pit and fissure region
  • Extraction method of tooth three-dimensional point cloud data surface pit and fissure region

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Embodiment Construction

[0070] The technical solution of the present invention will be further described and illustrated below through specific embodiments, so that the technical solution of the present invention will be more clear and comprehensible.

[0071] like figure 1 As shown, this embodiment relates to a method for extracting pit and fissure feature areas on the surface of tooth three-dimensional point cloud data, including the following steps:

[0072] Step 1: Read and display the 3D tooth point cloud data.

[0073] Step 2: Calculate the center of gravity of the tooth point cloud data and its main direction, and use the three-dimensional model space transformation formula to correct the attitude of the three-dimensional point cloud data of the teeth, so that the origin of the spatial coordinate system is at the center of gravity of the tooth point cloud data model, and the occlusal surface is parallel to The XOY plane of the space coordinate system is perpendicular to the Z axis of the spac...

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Abstract

The invention discloses a method for extracting a tooth three-dimensional point cloud data surface pit and fissure feature region. According to the method, the pit and fissure skeleton line on the surface of the tooth can be extracted only by inputting the three-dimensional point cloud data of the single tooth, section processing is performed on the three-dimensional data of the tooth according tothe pit and fissure skeleton line, the pit and fissure section curve of the tooth is obtained through curve fitting, and the method does not damage the tooth but can obtain a complete and comprehensive pit and fissure form.

Description

technical field [0001] The invention belongs to the technical field of digital processing of tooth models, in particular to a method for extracting pit and fissure areas on the surface of tooth three-dimensional point cloud data. Background technique [0002] Teeth, as an important organ for people to chew food, are an integral part of daily tearing, grinding and biting of food. Since the human body needs food to replenish energy every day, the teeth are used every day, and they are chewed in contact with all kinds of food. Dental caries is a progressive damage to the hard tissue of teeth caused by the combined action of multiple factors in the oral cavity. It is the most common oral disease in the world and seriously threatens the health of patients. Studies have shown that due to the unique anatomical structure and arrangement of molars, the surface of the teeth is extremely prone to caries. The study pointed out that although the occlusal surface of the teeth only accoun...

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Application Information

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IPC IPC(8): G06T7/00G06T7/11
CPCG06T7/0012G06T7/11G06T2207/10028G06T2207/30036
Inventor 陈庆光金星
Owner HANGZHOU DIANZI UNIV
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