Periodontal ligament stress analysis method and device

Abstract

The invention discloses a periodontal ligament stress analysis method and device. The method comprises the following steps: 1, obtaining geometric models of a digital tooth model, a digital periodontal ligament model and a digital alveolar bone model; selecting the types of constitutive models of the three models to form a digital dental model; selecting boundary conditions of the digital dental model to obtain a digital dental finite element model and carrying out nonlinear finite element calculation, and obtaining stress distribution data of the digital periodontal ligament model so as to verify the consistency of the digital tooth model with a simulated correction target when the digital tooth model is rearranged. Whether alveolar bone reconstruction is caused by bone resorption or bonedeposition of the alveolar bone under the conditions that alveolar jaw changes in pose and / or bears load can be accurately judged; the constitutive models closer to periodontal ligament characteristics are selected by utilizing the geometric models closer to the actual situation in the mouth of a patient, so that the calculated stress distribution data is closer to the actual situation, and a data basis is provided for design, preparation and inspection of subsequent dental instruments.

Description

Technical field [0001] The present invention relates to the technical field of medical devices, in particular to a method and device for analyzing periodontal ligament stress, electronic equipment, and computer storage media. Background technique [0002] The use of invisible dental appliances to correct teeth is more and more accepted by patients because they are beautiful, comfortable and convenient for patients to remove and wear by themselves. Invisible dental appliances are designed according to the patient's intraoral situation for virtual correction schemes, and then based on virtual corrections. The plan is to prepare an invisible dental appliance that can reposition the teeth from the first layout to the second layout. The prepared invisible dental appliance is a series of polymer shell-shaped instruments that gradually adjust the tooth layout. When the patient wears the invisible dental appliance The patient's teeth can be re-arranged and gradually changed to the target...

AI Technical Summary

Problems solved by technology

[0003] Some existing technologies use commercial CAE (Computer Aided Engineering, referring to computer-aided engineering in engineering design) software such as Abaqus and Ansys to analyze the force of the periodontal ligament, but the constitutive model of the commercial software is difficult to meet the requirements of orthodontic treatment. The nature of the periodontal ligament requires a theoretical derivation of the constitutive model of the periodontal ligament to obtain the Jacobian matrix representing the stress-strain relationship before it can be used

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