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Tooth Anatomy

Tooth Anatomy

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.

Teeth

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...

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Interactive tooth segmentation of dental models.

Mingxi Zhao¹, Lizhuang Ma, Wuzheng Tan

¹PHD. Candidate in Department of Computer Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China. zhaomx@cs.sjtu.edu.cn.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

|February 7, 2007

Summary

This study introduces an interactive method for precise tooth segmentation in orthodontic applications. The approach accurately separates individual teeth from triangle meshes, overcoming natural variations in dental anatomy.

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Area of Science:

Computer-aided dentistry
Medical imaging analysis
Geometric modeling

Background:

Accurate tooth segmentation from triangle meshes is crucial for computer-aided orthodontic applications.
The variability in tooth shape and arrangement presents significant challenges for automated segmentation.
Existing methods may lack the precision required for individual tooth analysis.

Purpose of the Study:

To develop a novel interactive method for accurate tooth segmentation from triangle mesh data.
To address the difficulties posed by natural variations in dental anatomy.
To enable precise individual tooth segmentation for orthodontic purposes.

Main Methods:

Utilizing curvature values of the triangle mesh to identify feature points.
Connecting feature points into feature regions.
Extracting feature lines and obtaining feature contours with user input.
Employing feature contours for accurate tooth segmentation.

Main Results:

The proposed method achieves accurate segmentation of teeth from triangle meshes.
Individual teeth can be reliably segmented, even with variations in shape and arrangement.
The interactive approach enhances the precision of the segmentation process.

Conclusions:

The developed interactive method provides an accurate solution for tooth segmentation in computer-aided orthodontics.
This technique effectively handles the inherent variability of dental structures.
The user-guided feature contour extraction ensures precise and individual tooth segmentation.