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Oral cavity scanning device based on optical coherence tomography principle

An optical coherence tomography and scanning device technology, applied in the field of oral scanning devices, can solve problems such as overlapping deviation and ionizing radiation damage, and achieve the effects of convenient storage, improved comfort, and saving material costs and operating time

Active Publication Date: 2021-01-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method solves the problem of the crown scanning accuracy and the overall imaging of the crown and root to a certain extent, the process of aligning and registering the intraoral scan model and the CBCT reconstruction model is prone to overlap deviation, and there is still a risk of ionizing radiation damage

Method used

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  • Oral cavity scanning device based on optical coherence tomography principle
  • Oral cavity scanning device based on optical coherence tomography principle
  • Oral cavity scanning device based on optical coherence tomography principle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] An oral cavity scanning device based on the principle of optical coherence tomography, such as figure 1 As shown, it includes a three-dimensional scanning module 3, an anti-fog and moisture-proof module 4, a drainage port 28, a control port 29 and a data processing port 30;

[0041] The three-dimensional scanning module 3 includes a light source 5, a first beam splitter 6, a second beam splitter 15, a first lens 7, a second lens 9, a third lens 12, a plane mirror 8, a high-speed scanning galvanometer 10, Deflection angle monitoring assembly 11, light penetrating plate 13, delay line assembly 16, color camera system 17, and detection assembly 18; the anti-fog and moisture-proof module 4 includes a wind-heat heating device and a negative pressure saliva suction device;

[0042] Such as figure 2 As shown, the negative pressure saliva suction device is connected to the drainage port 28, and the negative pressure suctioned saliva is drained to the externally connected drai...

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Abstract

The invention discloses an oral cavity scanning device based on an optical coherence tomography principle. Based on the optical coherence tomography principle, interference spectrum signals generatedby convergence of backscattered light of tissues with different depths and a reference light beam are detected, and parallel detection of depth information is realized through inverse Fourier transform. Longitudinal tomography capacity and horizontal screening function are combined, the invention provides the oral cavity scanning device which can realize real-time reconstruction of a digital oralcavity three-dimensional model being complete in data and high in resolution ratio under the non-ionizing radiation and non-intruding conditions. Compared with a traditional impression technology, complete digitization is achieved, the material cost and the operation time are saved, the comfort level of a patient and the model quality are improved, and the digitized model is convenient to store, transmit and analyze. The digital oral impression device has the beneficial effects that the existing digital oral impression technology does not have.

Description

technical field [0001] The invention relates to the technical fields of biomedicine and optical imaging, in particular to an oral cavity scanning device based on the principle of optical coherence tomography. Background technique [0002] In the clinical diagnosis and treatment of orthodontics, model analysis is one of the important inspection methods for diagnosing malocclusion. The orthodontic model is an exact copy of the shape of the patient's teeth, dental arch, alveolar, basal bone, and palatal cover, as well as the occlusal relationship between the upper and lower teeth, including working models and memory models. The working model can be used for model measurement analysis, tooth arrangement test, and it is also the carrier for making various orthodontic devices. The memory model is a record of the patient's dental condition before orthodontic treatment, at certain stages during the orthodontic process, and after the orthodontic treatment. It can be used for control...

Claims

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Application Information

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IPC IPC(8): A61C9/00
CPCA61C9/0073
Inventor 杨中民何彬韦小明
Owner SOUTH CHINA UNIV OF TECH
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