Browsing by Author "Ho, Yi-Ching"

Now showing 1 - 5 of 5

Characterization of tooth structure and the dentin-enamel zone based on the Stokes-Mueller calculation
(2012-11-01)
Sun, Chia-Wei
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Hsieh, Yao-Sheng
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Ho, Yi-Ching
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Jiang, Cho-Pei
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Chuang, Ching-Cheng
This is the first study of dentin-enamel zone (DEZ) identification with tooth structure characterization based on the optical Stokes-Mueller measurement. Stokes vectors of a cross-sectional tooth slice were measured using various polarization inputs. The direction of the DEZ is different in enamel and dentin structures; therefore, the Stokes profiles can specifically characterize the structures based on the DEZ. This optical method, using polarimetry, provides a useful tool for characterizing tooth. (c) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JBO.17.11.116026]
Dental Calculus Image Based on Optical Coherence Tomography
(2011)
Hsieh, Yao-Sheng
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Ho, Yi-Ching
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Lee, Shyh-Yuan
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Chuang, Ching-Cheng
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Wang, Chun-Yang
In this study, the dental calculus was characterized and imaged by means of swept-source optical coherence tomography (SSOCT). The refractive indices of enamel, dentin, cementum and calculus were measured as 1.625+/-0.024, 1.534+/-0.029, 1.570+/-0.021 and 1.896+/-0.085, respectively. The dental calculus lead strong scattering property and thus the region can be identified under enamel with SSOCT imaging. An extracted human tooth with calculus was covered by gingiva tissue as in vitro sample for SSOCT imaging.
Dental Optical Coherence Tomography
(2013-07-01)
Hsieh, Yao-Sheng
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Ho, Yi-Ching
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Lee, Shyh-Yuan
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Chuang, Ching-Cheng
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Tsai, Jui-che
This review paper describes the applications of dental optical coherence tomography (OCT) in oral tissue images, caries, periodontal disease and oral cancer. The background of OCT, including basic theory, system setup, light sources, spatial resolution and system limitations, is provided. The comparisons between OCT and other clinical oral diagnostic methods are also discussed.
Sensing of Tooth Microleakage Based on Dental Optical Coherence Tomography
(2015-01-01)
Sun, Chia-Wei
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Ho, Yi-Ching
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Lee, Shyh-Yuan
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影像與生醫光電研究所
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Institute of Imaging and Biomedical Photonics
This study describes microleakage sensing based on swept-source optical coherence tomography (SS-OCT). With a handheld scanning probe, the SS-OCT system can provide portable real-time imaging for clinical diagnosis. Radiography is the traditional clinical imaging instrument used for dentistry; however, it does not provide good contrast images between filling material and the enamel of treated teeth with microleakage. The results of this study show that microleakage can be detected with oral probing using SS-OCT in vivo. The calculated microleakage length was 401 mu m and the width is 148 mu m, which is consistent with the related histological biopsy measurements. The diagnosis of microleakage in teeth could be useful for prevention of secondary caries in the clinical treatment plans developed in the field of oral medicine.
Subgingival calculus imaging based on swept-source optical coherence tomography
(2011-07-01)
Hsieh, Yao-Sheng
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Ho, Yi-Ching
;
Lee, Shyh-Yuan
;
Lu, Chih-Wei
;
Jiang, Cho-Pei
We characterized and imaged dental calculus using swept-source optical coherence tomography (SS-OCT). The refractive indices of enamel, dentin, cementum, and calculus were measured as 1.625 +/- 0.024, 1.534 +/- 0.029, 1.570 +/- 0.021, and 2.097 +/- 0.094, respectively. Dental calculus leads strong scattering properties, and thus, the region can be identified from enamel with SS-OCT imaging. An extracted human tooth with calculus is covered with gingiva tissue as an in vitro sample for tomographic imaging. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3602851]