Method for determining container of single tooth
A technology for inclusion bodies and teeth, which is applied in dentistry, medical science, special data processing applications, etc., and can solve problems such as long cycle time and patient inconvenience
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Embodiment 1
[0082] Embodiment 1, the classification of tooth body in stomatology
[0083] In prosthodontics, teeth are divided into four categories according to their functions and characteristics: incisors, canines, premolars, and molars. image 3 shown.
[0084] The incisors are further divided into central incisors and lateral incisors, located in the front of the mouth, up, down, left, and right, a total of 8 teeth, the crown of the proximal view is wedge-shaped, the neck is thick and the incisal margin is thin, and its main function is to cut food.
[0085] Canines, commonly known as canines, are located at the corners of the mouth. There are 4 upper, lower, left, and right teeth. The crown is still wedge-shaped, and there is a protruding cusp on the incisal edge.
[0086] Premolars, also known as bicuspids, are located behind the canines and in front of the molars, up, down, left, and right. There are 8 teeth in total. The molars have tricuspids, the main function of which is to ...
Embodiment 2
[0089] Embodiment 2, collection of surface feature points of a single tooth and extraction of tooth surface feature points
[0090] The feature points of the tooth surface are collected, and the process is as follows:
[0091] (1) On the basis of segmenting the tooth digital model, select different tooth models in turn, and calculate the Gaussian curvature values of all points on the tooth surface in turn. Establish a data structure GaoSi used to store the Gaussian curvature value information of tooth surface feature points, use m to mark the Gaussian curvature value of the point, and use ptIndex to store the index information of the point.
[0092] (2) Repeat step (1), calculate the Gaussian curvature values of all tooth surface vertices, and sort all Gaussian curvature values;
[0093] (3) Using an interactive method to display the vertex coordinates of the tooth and the Gaussian curvature value of the point, and draw the point on the digital model of the tooth for the ...
Embodiment 3
[0114] Embodiment 3. Establishing a local three-dimensional coordinate system of a single tooth according to the feature points on the tooth surface
[0115] Taking molars as an example, mesial buccal point A, distal buccal point B, mesial lingual point or distal lingual point C. The straight line where point AB is located is parallel to the near-distal direction of the tooth, so define the direction of the straight line where AB is located as the Z-axis direction of the coordinate system; Mandibular direction; finally define the direction of the line where the cross product of the Y-axis and the Z-axis is located as the X-axis direction of the coordinate system, that is, the buccal-lingual direction of the molars (see Figure II The definition and description of the buccal direction of the crown), at this time, after determining the directions of the three coordinate axes of each tooth, the midpoint of the three axes with fixed lengths is translated to the geometric center of...
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