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J Korean Acad Prosthodont. 2017 Jan;55(1):100-110. Korean.
Published online Jan 25, 2017.  https://doi.org/10.4047/jkap.2017.55.1.100
© 2017 The Korean Academy of Prosthodontics
Study on application to the field of dentistry using optical coherence tomography (OCT)
Se-Wook Pyo,1 Young-Joon Lim,1 Won-Jin Lee,2 and Jun-Jae Lee1
1Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.
2Department of Oral and Maxillofacial Radiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.

Corresponding Author: Jun-Jae Lee. Department of Prosthodontics, School of Dentistry, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea. +82 (0)2 2072 2940: Email: jazzyguts@gmail.com
Received July 11, 2016; Revised September 07, 2016; Accepted September 09, 2016.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Abstract

Purpose

This paper describes the basic principles and the feasibility of the field of dental diagnosis of optical coherence tomography (OCT) used in diverse field of medical diagnosis.

Materials and methods

In this review, the research data of OCT were searched from PubMed, medical journal and related papers.

Results

Generally, OCT is non-invasive and is possible to secure an excellent spatial resolution and real-time images of biological microstructure.

Conclusion

This review discusses not only the basic principles of operation, types, advantages, disadvantages of OCT but also the future applications of OCT technology and their potential in the field of dental diagnosis.

Keywords: Optical coherence tomography (OCT); Oral diagnosis; Dental imaging

Figures


 Fig. 1
The principle of the Michelson interferometer.
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Fig. 2
The principle of confocal microscopy.
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Fig. 3
Comparison of resolution and tissue penetration depth with OCT and other medical imaging equipment. (Data source: OCT supports industrial nondestructive depth analysis. Laser Focus World. 2011.8).10
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Fig. 4
The schematics of (A) TD-OCT and (B) FD-OCT.
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Fig. 5
Block diagrams of the OCT methods with the use of Fourier-domain detection. (A) Spectral OCT, (B) Swept source OCT.
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Fig. 6
Image obtained from a distinct enamel crack. (A) A photo examination of the enamel crack using transillumination(arrow) in which SS-OCT scanning was performed along the red line. (B) An SS-OCT image along the red line in (A). (Image courtesy of Korea Photonics Technology Institute).
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Fig. 7
Marginal image of zirconia core and teeth by using OCT (coping: zirconia core, die: plaster cast, gap: marginal fidelity, surface: surface of zirconia core), (with permission from J Korean Content Soc40).
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Fig. 8
Measurement of marginal fit between implant and abutment using 3-D OCT. (A) OCT image of the control which was tightened without stainless steel plates with three-dimensional (3-D) OCT image. (B) The sample in (a) overlaid with porcine gingiva (GN). Implant surface is in a close proximity to the GN. (C) Increased signal intensity at the implant-abutment interface corresponds to gap between an implant and an abutment in OCT image (arrows). The length of this line indicates GS. The bottom image is a 3-D OCT scan. (D) Porcine tissue covering the implant-abutment interface. The gap (arrows) can be clearly observed in this sample (with permission from J Biomed Opt45).
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Tables


 Table 1
Comparison of the dental OCT and other medical imaging equipment
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Table 2
Medical applications and contents of OCT
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Table 3
Feature comparison of SD-OCT vs SS-OCT
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Table 4
Types and principles of OCT by image representation
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Notes

※This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2015M3A9E2067369).

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ORCID iDs

Jun-Jae Lee
https://orcid.org/http://orcid.org/0000-0002-5496-0168

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