An oral cavity scanning device based on the principle of optical coherence tomography

An optical coherence tomography and scanning device technology, which is applied in the field of oral scanning devices, can solve problems such as overlap deviation and ionizing radiation damage, and achieve the effects of easy storage, improved comfort, and high-resolution imaging

Active Publication Date: 2021-12-21
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • An oral cavity scanning device based on the principle of optical coherence tomography
  • An oral cavity scanning device based on the principle of optical coherence tomography
  • An oral cavity scanning device based on the principle of optical coherence tomography

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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] like 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 drainag...

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Abstract

The invention discloses an oral cavity scanning device based on the principle of optical coherence tomography. Based on the principle of optical coherence tomography, the present invention detects interference spectrum signals generated by combining backscattered light and reference beams of tissues at different depths, and realizes parallel detection of depth information through inverse Fourier transform. The present invention combines the longitudinal tomography capability with the transverse scanning function, and provides an oral cavity scanning device for real-time reconstruction of a high-resolution digital three-dimensional model of the oral cavity under the conditions of non-ionizing radiation and non-invasiveness. Compared with the traditional impression technology, the present invention realizes complete digitization, saves material cost and operation time, improves patient comfort and model quality, and the digital model is convenient for storage, transmission and analysis. The invention has beneficial effects that the current digital oral impression technology does not possess.

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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Patent Type & Authority Patents(China)
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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