Correction method for preventing excessive stress concentration of teeth roots and jaws in process of orthodontic treatment

Abstract

The invention relates to a correction method for preventing excessive stress concentration of teeth roots and jaws in the process of orthodontic treatment, belonging to the technical field of orthodontics of teeth. The correction method comprises the following steps of: establishing an automatic-matching 3D (three dimensional) integrated tooth-jaw model; carrying out stepwise virtual correction on the 3D integrated tooth-jaw model; applying 3D finite-element analysis to determine the dynamic change of stress distribution of the teeth roots and the jaws in the whole process of the virtual correction and guarantee that the stress of the teeth roots and the jaws in correction is in the safety range; and manufacturing a clinical correction device by a fast laser forming technology. By the individualized correction device designed and manufactured by a computer in an auxiliary manner, the positions and the routes of movement of the teeth roots can be controlled. By expression and verification, the correction method can duplicate the condition of virtual correction in actual treatment, realizes good position relation among the teeth roots, the teeth and the jaws in the correction process, and is beneficial to reducing and eliminating absorption of the teeth roots and the alveolar bones due to excessive stress concentration in the process of orthodontic treatment and reducing and avoiding recurrence after correction.

Description

technical field [0001] The invention belongs to the technical field of orthodontics, and in particular relates to an orthodontic method for preventing excessive stress concentration of tooth roots and jaws during orthodontic treatment. Background technique [0002] Root resorption is one of the common complications of orthodontic treatment. Recent studies have shown that root resorption after orthodontic treatment is even as high as 41.6%. Many studies have shown that orthodontic root resorption is a common phenomenon accompanied by orthodontic treatment, preventing orthodontic treatment Central tooth root resorption is an urgent problem that needs to be solved. The root cause of root resorption in orthodontic treatment is related to excessive stress concentration at the root tip during tooth movement. The cause of excessive stress concentration is caused by the poor positional relationship between the tooth root and the jawbone during orthodontic treatment: for example, the...

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Problems solved by technology

[0004] Three-dimensional finite element analysis is a commonly used stress analysis method, but CT with a large radiation dose is required for modeling, and CBCT with a low radiation dose is not widely used, so it is not yet possible to treat orthodontic patients clinically. During the process, the dynamic stress analysis of the tooth root and jaw bone is carried out; on the other hand, although the tooth root and jaw bone can be included in the virtual row of teeth to control the positional relationship between the tooth root and the jaw bone after orthodontic treatment, orthodontic root resorption occurs In the process of orthodontics, how to ensure that there is no excessive stress concentration in the root and jaw during the whole orthodontic treatment process, the previous technology has not been able to completely solve the problem.

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