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Transverse rotation axis positioning and extracting method for lower jawbone CBCT data

A technology of lateral rotation and extraction method, applied in medical science, dentistry, orthodontics, etc., can solve problems such as large errors, and achieve the effect of improving convenience and accuracy

Active Publication Date: 2021-03-16
施洁珺
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Problems solved by technology

In actual use, the operator will use the "experienced rotation axis" as the horizontal rotation axis. The method of determination is to determine the reference point 13mm forward from the tragus on the line connecting the patient's tragus to the external bariae, and connect the left and right sides Form a horizontal rotation axis, but this method has a large error

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  • Transverse rotation axis positioning and extracting method for lower jawbone CBCT data
  • Transverse rotation axis positioning and extracting method for lower jawbone CBCT data
  • Transverse rotation axis positioning and extracting method for lower jawbone CBCT data

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Embodiment Construction

[0035] Below in conjunction with specific embodiment, the patent of the present invention is described in further detail.

[0036] Concrete embodiment of the present invention and its implementation process are as follows:

[0037] Step 1) Collect the CBCT data of the patient in the closed state and the state after occlusal insertion, and obtain the CBCT data in the open and closed states of the patient; The registration operation is performed on the CBCT data CT1 under the opening.

[0038] 1.1) According to the closed CBCT data CT0 and the open CBCT data CT1, respectively perform three-dimensional reconstruction operations to obtain the open upper and lower jaw model M0 when the patient is opening and the closed upper and lower jaw model M1 when the patient is closed;

[0039] 1.2) Set four pairs of fixed marker points of the maxilla, as the overlap marker points of the open upper and lower jaw model M0 and the closed upper and lower jaw model M1;

[0040] 1.3) Calculate t...

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Abstract

The invention discloses a transverse rotation axis positioning and extracting method for lower jawbone CBCT data. The method comprises the steps that CBCT data of a patient in a closed state and CBCTdata of the patient in a state after occlusion and insertion are collected, and CBCT data of the patient in an open state and CBCT data of the patient in a closed state are obtained; registration operation is conducted on the closed CBCT data of the patient in the closed state and the open CBCT data of the patient in the state after occlusion and insertion; projection planes on the two sides are positioned; and the rotation centers of movement of the left jawbone and the right jawbone are obtained through processing, and a transverse rotation axis of the lower jawbone is obtained through connection. According to the method, the more accurate transverse rotation axis of the lower jawbone is obtained, a more real data result closer to teeth of the patient is obtained, and meanwhile the convenience and precision of tooth data positioning are improved.

Description

technical field [0001] The invention belongs to the field of oral cavity digital model processing and relates to a method for processing dental mandibular CBCT data, in particular to a method for extracting the lateral rotation axis location of the mandibular CBCT data. [0002] technical background [0003] Computer simulation of the movement of the mandible is one of the key technologies in orthodontics. The use of computer simulation of the movement of the mandible can help improve the accuracy of oral treatment and diagnosis. [0004] When the mandible opens and closes the mouth in a small range, the mandible will simply rotate according to a horizontal rotation axis, which is also called the "hinge axis". [0005] Traditionally, the measurement of the horizontal rotation axis requires the use of professional equipment such as a sports facebow, which takes a long time and requires the operator to have certain experience. In actual use, the operator will use the "experien...

Claims

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Application Information

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IPC IPC(8): A61C7/00
CPCA61C7/002
Inventor 施洁珺
Owner 施洁珺
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