Articles that mention National Center for Geriatrics and Gerontology in Japan -Optical Coherence Tomography News

National Center for Geriatrics and Gerontology in Japan

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1. Mentioned In 79 Articles
2. Assessment of Demineralization Inhibition Effects of Dentin Desensitizers Using Swept-Source Optical Coherence Tomography
  
  Explore MDPI Open Access Journals Platform Apr 21 2021 Dentistry
  
  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 ...
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  Mentions: University of Washington Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
3. Diagnosis of Occlusal Tooth Wear Using 3D Imaging of Optical Coherence Tomography Ex Vivo
  
  Explore MDPI Open Access Journals Platform Oct 30 2020 Dentistry
  
  The aim of this study was to assess the utility of 3D imaging of optical coherence tomography (OCT) for the diagnosis of occlusal tooth wear ex vivo. Sixty-three extracted human molars with or without visible tooth wear were collected to take digital intraoral radiography and 3D OCT images. The degree of tooth wear was evaluated by 12 examiners and scored using 4-rank scale: 1slight enamel wear; 2distinct enamel wear; 3tooth ...
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  Mentions: University of Washington Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
4. Evaluation of dental caries, tooth crack, and age-related changes in tooth structure using optical coherence tomography
  
  Explore ScienceDirect Oct 6 2020 Dentistry
  
  Optical coherence tomography (OCT) is an imaging technique that can visualize the internal biological structure without X-ray exposure. Swept-source OCT (SS-OCT) is one of the latest version of OCT, wherein the light source is a tunable laser that sweeps near-infrared wavelength light to achieve real-time imaging. The imaging depth of OCT is highly influenced by the translucency of the medium. The medium that does not transmit light and the deeper ...
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  Mentions: Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
5. Interfacial Evaluation of CAD/CAM Resin Inlays on the Cavity Floor Using Swept-source Optical Coherence Tomography
  
  Explore Allen Press Oct 1 2020 Dentistry
  
  Purpose: The first objective of this study was to determine whether the luting material used for computer-aided design and computer-aided manufacture resin nanoceramic inlays affected interfacial adaptation. The second objective was to investigate whether application of a universal dentin adhesive before cementation affected interfacial adaptation. The final objective was to compare the inlay-side and dentin-side interfaces in the cement space. Methods and Materials: Seventy-four class I cavities were prepared on ...
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  Mentions: National Center for Geriatrics and Gerontology in Japan
6. 3D imaging of proximal caries in posterior teeth using optical coherence tomography
  
  Explore Nature Publishing Group Sep 28 2020 Dentistry
  
  Optical coherence tomography (OCT) can create cross-sectional images of tooth without X-ray exposure. This study aimed to investigate the diagnostic accuracy of 3D imaging of OCT for proximal caries in posterior teeth. Thirty-six human molar teeth with 51 proximal surfaces visibly 6 intact, 16 slightly demineralized, and 29 distinct carious changes were mounted to take digital radiographs and 3D OCT images. The sensitivity, specificity and area under the receiver operating ...
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  Mentions: University of Washington National Center for Geriatrics and Gerontology in Japan University of Hong Kong
7. Method and apparatus for measuring and displaying dental plaque, gingiva, and alveolar bone
  
  Explore uspto.gov Apr 9 2019 Dentistry , Patents
  
  A method and an apparatus for measuring and displaying dental plaque are provided, and the method includes the steps of dividing near infrared light output from a light source into measurement light and reference light, applying the measurement light toward a tooth in an oral cavity and scanning the tooth with the measurement light, producing interference light from reflected light and back-scattered light from the tooth and the reference light ...
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  Mentions: National Center for Geriatrics and Gerontology in Japan
8. Three-dimensional assessment of proximal contact enamel using optical coherence tomography
  
  Explore ScienceDirect Feb 19 2019 Dentistry
  
  Objective The purpose of this study was to detect and investigate the association of enamel microcracks with demineralization at proximal contact areas of premolars, using 3D swept-source optical coherence tomography (SS-OCT). Methods Extracted maxillary and mandibular premolars (n = 50 each), without any visible tooth cracks, were examined for demineralization of interproximal contact areas, using the International Caries Detection and Assessment System (ICDAS). SS-OCT was used to evaluate demineralization and detect ...
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  Mentions: University of Washington Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
9. Assessment of root caries under wet and dry conditions using swept-source optical coherence tomography (SS-OCT)
  
  Explore jstage.jst.go.jp Jul 7 2018 Dentistry
  
  The purpose of this study was to compare optical properties of root caries under two observing conditions using swept-source optical coherence tomography (SS-OCT). In vitro and natural root caries were observed by SS-OCT under wet and dry conditions, followed by confocal laser scanning microscope (CLSM) and transverse microradiography (TMR). Signal intensity (SI), distance between SI peaks (SI-distance) and optical lesion depth were obtained from OCT. Lesion depth was measured from ...
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  Mentions: University of Washington Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
10. Assessment of enamel cracks at adhesive cavosurface margin using three-dimensional swept-source optical coherence tomography
  
  Explore ScienceDirect Apr 20 2017 Dentistry
  
  Objectives Swept-source optical coherence tomography (SS-OCT) can construct cross-sectional images of internal biological structures. The aim of this study was to evaluate enamel cracks at the cavosurface margin of composite restorations using SS-OCT. Methods Bowl-shaped cavities were prepared at two locations (mid-coronal and cervical regions) on the enamel surface of 60 bovine teeth. Half of the cavities (30) were treated with phosphoric acid gel. A two-step self-etch adhesive (Clearfil SE ...
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  Mentions: National Center for Geriatrics and Gerontology in Japan
11. Resolution characteristics of optical coherence tomography for dental use
  
  Explore Resolve a DOI Jan 8 2017 Dentistry
  
  OBJECTIVES: The purpose of this study was to clarify resolution characteristics of optical coherence tomography (OCT) for dental use. METHODS: Two types of swept-source OCT machines (SS-OCTs) were employed in this study. To clarify their resolution characteristics, we newly developed a glass chart device with a ladder pattern of wavelengths, which ranged from (4 x 2) m to (1024 x 2) m, as well as a star-target pattern, a grid ...
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  Mentions: Santec Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
12. A pilot study to assess the morphology and progression of non-carious cervical lesions
  
  Explore ScienceDirect Dec 9 2016 Dentistry
  
  Objective This longitudinal pilot study aimed to morphologically and quantitatively investigate the progress of non-carious cervical lesions (NCCLs) by using swept-source optical coherence tomography (SS-OCT). Methods The samples examined comprised sets of NCCL epoxy resin replicas obtained from 10 lesions in 6 patients who attended annual dental visits over 4 or 5 years. SS-OCT images of the replicas were analyzed in terms of the maximum depth (D max ) and corresponding ...
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  Mentions: National Center for Geriatrics and Gerontology in Japan
13. Three-Dimensional Analysis of Enamel Crack Behavior Using Optical Coherence Tomography
  
  Explore Journal of Dental Research Nov 26 2016 Dentistry
  
  The aim of this study was to nondestructively analyze enamel crack behavior on different areas of teeth using 3D swept source-optical coherence tomography (SS-OCT). Ten freshly extracted human teeth of each type on each arch ( n = 80 teeth) were inspected for enamel crack patterns on functional, contact and nonfunctional, or noncontact areas using 3D SS-OCT. The predominant crack pattern for each location on each specimen was noted and analyzed. The ...
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  Mentions: Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
14. Optical analysis of enamel and dentin caries in relation to mineral density using swept-source optical coherence tomography
  
  Explore SPIE | Journal Oct 1 2016 Dentistry
  
  The aim of this study was to evaluate the signal intensity and signal attenuation of swept source optical coherence tomography (SS-OCT) for dental caries in relation to the variation of mineral density. SS-OCT observation was performed on the enamel and dentin artificial demineralization and on natural caries. The artificial caries model on enamel and dentin surfaces was created using Streptococcus mutans biofilms incubated in an oral biofilm reactor. The lesions ...
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  Mentions: Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
15. The effectiveness of optical coherence tomography for evaluating peri-implant tissue: A pilot study
  
  Explore KoreaMed Synapse Sep 27 2016 Ophthalmology
  
  Purpose Optical coherence tomography (OCT) has been investigated as a novel diagnostic imaging tool. The utilisation of this equipment has been evaluated through several studies in the field of dentistry. The aim of this preliminary study was to determine through basic experiments the effectiveness of OCT in implant dentistry. Materials and Methods To assess detection ability, we captured OCT images of implants in each of the following situations: (1) implants ...
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  Mentions: Tokyo Medical & Dental University National Center for Geriatrics and Gerontology in Japan
16. Method and apparatus for measuring and displaying dental plaque
  
  Explore uspto.gov Sep 20 2016 Dentistry , Patents
  
  A method and an apparatus for measuring and displaying dental plaque are provided, and the method includes the steps of dividing near infrared light output from a light source into measurement light and reference light, applying the measurement light toward a tooth in an oral cavity and scanning the tooth with the measurement light, producing interference light from reflected light and back-scattered light from the tooth and the reference light ...
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  Mentions: National Center for Geriatrics and Gerontology in Japan
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