scholarly journals Diagnosis of Occlusal Caries with Dynamic Slicing of 3D Optical Coherence Tomography Images

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1659 ◽  
Author(s):  
Minh N. Luong ◽  
Yasushi Shimada ◽  
Kazuyuki Araki ◽  
Masahiro Yoshiyama ◽  
Junji Tagami ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Treatment Decision ◽  
Optical Coherence ◽  
Occlusal Caries ◽  
Swept Source ◽  
Treatment Decision Making ◽  
Dynamic Slicing ◽  
Dentin Caries ◽  
Occlusal Surfaces

Detecting the extent of occlusal caries is a clinically important but challenging task required for treatment decision making. The aim of this study was to assess the diagnostic power of 3D swept-source optical coherence tomography (OCT) for evaluation of occlusal caries in comparison with X-ray radiography. Extracted human molars not exhibiting American Dental Association (ADA) criteria advanced caries were mounted in a silicone block and digital dental radiographs were captured from the buccal side. Subsequently, occlusal surfaces were scanned with a prototype Yoshida Dental OCT. Thirteen examiners evaluated the presence and extent of caries on radiographs and dynamically sliced 3D OCT video images, using a 4 level scale—0: intact; 1: enamel demineralization without cavitation; 2: enamel caries with cavitation; 3: dentin caries with or without cavitation. Sensitivity, specificity and area under operating characteristic curves (Az) were statistically analyzed (α = 0.05). Reliability analysis showed an excellent agreement among the 13 examiners for both methods. The OCT presented a significantly higher sensitivity and Az value for the detection of caries compared to radiographs (p < 0.05). Radiography showed especially low sensitivity for dentin caries (0–2 versus 3). Dynamic slicing of 3D OCT volumes is a powerful adjunct tool to visual inspection to diagnose the dentin occlusal caries in vitro.

scholarly journals Optical analysis of enamel and dentin caries in relation to mineral density using swept-source optical coherence tomography

2016 ◽  
Vol 3 (3) ◽  
pp. 035507 ◽  
Author(s):  
Tomoka Ueno ◽  
Yasushi Shimada ◽  
Khairul Matin ◽  
Yuan Zhou ◽  
Ikumi Wada ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Optical Analysis ◽  
Mineral Density ◽  
Swept Source ◽  
Dentin Caries

Detection of occlusal caries in primary teeth using swept source optical coherence tomography

2014 ◽  
Vol 19 (1) ◽  
pp. 016020 ◽  
Author(s):  
Yukie Nakajima ◽  
Yasushi Shimada ◽  
Alireza Sadr ◽  
Ikumi Wada ◽  
Michiyo Miyashin ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Primary Teeth ◽  
Optical Coherence ◽  
Occlusal Caries ◽  
Swept Source

scholarly journals Assessment of Demineralization Inhibition Effects of Dentin Desensitizers Using Swept-Source Optical Coherence Tomography

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1876
Author(s):  
Kumiko Matsuzaki ◽  
Yasushi Shimada ◽  
Yasuo Shinno ◽  
Serina Ono ◽  
Kozo Yamaji ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Silicate Glass ◽  
Signal Intensity ◽  
Chemical Elements ◽  
Region Of Interest ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Morphological Differences

The purpose of this study was to evaluate the mechanism of action and the inhibiting effects of two types of desensitizers against dentin demineralization using pre-demineralized hypersensitivity tooth model in vitro. In this study, we confirmed that a hypersensitivity tooth model from our preliminary experiment could be prepared by immersing dentin discs in an acetic acid-based solution with pH 5.0 for three days. Dentin discs with three days of demineralization were prepared and applied by one of the desensitizers containing calcium fluoro-alumino-silicate glass (Nanoseal, NS) or fluoro-zinc-silicate glass (Caredyne Shield, CS), followed by an additional three days of demineralization. Dentin discs for three days of demineralization (de3) and six days of demineralization (de6) without the desensitizers were also prepared. The dentin discs after the experimental protocol were scanned using swept-source optical coherence tomography (SS-OCT) to image the cross-sectional (2D) view of the samples and evaluate the SS-OCT signal. The signal intensity profiles of SS-OCT from the region of interest of 300, 500, and 700 µm in depth were obtained to calculate the integrated signal intensity and signal attenuation coefficient. The morphological differences and remaining chemical elements of the dentin discs were also analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. SS-OCT images of CS and NS groups showed no obvious differences between the groups. However, SS-OCT signal profiles for both the CS and NS groups showed smaller attenuation coefficients and larger integrated signal intensities than those of the de6 group. Reactional deposits of the desensitizers even after the additional three days of demineralization were observed on the dentin surface in NS group, whereas remnants containing Zn were detected within the dentinal tubules in CS group. Consequently, both CS and NS groups showed inhibition effects against the additional three days of demineralization in this study. Our findings demonstrate that SS-OCT signal analysis can be used to monitor the dentin demineralization and inhibition effects of desensitizers against dentin demineralization in vitro.

Validation of swept-source optical coherence tomography (SS-OCT) for the diagnosis of occlusal caries

2010 ◽  
Vol 38 (8) ◽  
pp. 655-665 ◽  
Author(s):  
Yasushi Shimada ◽  
Alireza Sadr ◽  
Michael F. Burrow ◽  
Junji Tagami ◽  
Nobuyoshi Ozawa ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Occlusal Caries ◽  
Swept Source

Validation of swept source optical coherence tomography (SS-OCT) for the diagnosis of smooth surface caries in vitro

2013 ◽  
Vol 41 (1) ◽  
pp. 80-89 ◽  
Author(s):  
Hisaichi Nakagawa ◽  
Alireza Sadr ◽  
Yasushi Shimada ◽  
Junji Tagami ◽  
Yasunori Sumi
Keyword(s):  
Optical Coherence Tomography ◽  
Smooth Surface ◽  
Optical Coherence ◽  
Swept Source
Sign in / Sign up

Export Citation Format

Share Document