1. Articles from Yuan Zhou

    1-6 of 6
    1. Detection and analysis of early degradation at resin-dentin interface by optical coherence tomography (OCT) and confocal laser scanning microscope (CLSM)

      Detection and analysis of early degradation at resin-dentin interface by optical coherence tomography (OCT) and confocal laser scanning microscope (CLSM)

      Objective To evaluate early degradation at resin-dentin interface using non-invasive swept-source optical coherence tomography (SS-OCT) and confocal laser scanning microscope (CLSM). Methods Self-etch adhesives and resin-composites containing bisphenol-glycidyl-dimethacrylate (Bis-GMA), which is one of the most widely used monomers in restorative materials, were investigated in this study. Forty cervical cavities were prepared in bovine incisors and applied by the adhesive with/without Bis-GMA (AdhesiveBG/Adhesive), filled by the resin with/without Bis-GMA (ResinBG/Resin) and then challenged by cariogenic biofilm (37 °C, 24 h). Gap Formation and dentin demineralization around resin-composites were observed by SS-OCT and CLSM. Results Three types of ...

      Read Full Article
    2. 3D imaging of proximal caries in posterior teeth using optical coherence tomography

      3D imaging of proximal caries in posterior teeth using optical coherence tomography

      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 characteristic curve (AUC) for the diagnosis of enamel caries and dentin caries were calculated to quantify the diagnostic ability of 3D OCT in comparison with digital radiography. Diagnostic accuracy was ...

      Read Full Article
    3. Assessment of root caries under wet and dry conditions using swept-source optical coherence tomography (SS-OCT)

      Assessment of root caries under wet and dry conditions using swept-source optical coherence tomography (SS-OCT)

      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 CLSM; lesion depth (LD TMR ) and mineral loss (ML) were obtained from TMR. In vitro root caries under wet and dry conditions showed different OCT images and SI patterns. Lesion ...

      Read Full Article
    4. Optical analysis of enamel and dentin caries in relation to mineral density using swept-source optical coherence tomography

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

      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 were centrally cross sectioned and SS-OCT scans were obtained in two directions to construct a three-dimensional data set, from the lesion surface (sagittal scan) and parallel to the lesion surface ...

      Read Full Article
    5. Assessment of bacterial demineralization around composite restorations using swept-source optical coherence tomography (SS-OCT)

      Assessment of bacterial demineralization around composite restorations using swept-source optical coherence tomography (SS-OCT)

      Objective To observe the bacterial demineralization of the enamel and dentin around composite restorations bonded with one-step and two-step self-etch adhesive systems using swept-source optical coherence tomography (SS-OCT). Methods Forty class V cavities (2.5-mm surface diameter, 2.0-mm maximum depth) were prepared on cervical areas of 20 human molars. The specimens were either treated with one-step adhesive (Clearfil Tri-S Bond ND Quick; TS) or two-step adhesive (Clearfil SE Bond; SE), restored with a flowable resin composite (Estelite Flow Quick). Specimens in the demineralized group were incubated for 2 weeks after Streptococcus mutans biofilm formation, while specimens in the control ...

      Read Full Article
    6. Rapid and high-resolution imaging of human liver specimens by full-field optical coherence tomography

      Rapid and high-resolution imaging of human liver specimens by full-field optical coherence tomography

      We report rapid and high-resolution tomographic en face imaging of human liver specimens by full-field optical coherence tomography (FF-OCT). First, the arrangement of the FF-OCT system was described and the performance of the system was measured. The measured axial and lateral resolutions of the system are 0.8 and 0.9     μ m , respectively. The system has a sensitivity of ∼ 60     dB and can achieve an imaging rate of 7 fps and a penetration depth of ∼ 80     μ m . The histological structures of normal liver can be seen clearly in the en face tomographic images, including central veins, cords of hepatocytes separated ...

      Read Full Article
    1-6 of 6
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (5 articles) Junji Tagami
    2. (5 articles) Yasushi Shimada
    3. (5 articles) Alireza Sadr
    4. (4 articles) Tokyo Medical & Dental University
    5. (4 articles) National Center for Geriatrics and Gerontology in Japan
    6. (4 articles) Yasunori Sumi
    7. (3 articles) University of Washington
    8. (1 articles) University of Hong Kong
    9. (1 articles) Nanjing University of Science and Technology
    10. (1 articles) Wanrong Gao
    11. (1 articles) Yonsei University
    12. (1 articles) Shanghai Jiao Tong University
    13. (1 articles) Tokyo Medical & Dental University
    14. (1 articles) University of Washington
    15. (1 articles) Junji Tagami
    16. (1 articles) Yasushi Shimada
    17. (1 articles) Alireza Sadr
    18. (1 articles) Dong Hoon Choi
    19. (1 articles) Avinger
  3. Popular Articles

  4. Picture Gallery

    Rapid and high-resolution imaging of human liver specimens by full-field optical coherence tomography Assessment of bacterial demineralization around composite restorations using swept-source optical coherence tomography (SS-OCT) Optical analysis of enamel and dentin caries in relation to mineral density using swept-source optical coherence tomography Assessment of root caries under wet and dry conditions using swept-source optical coherence tomography (SS-OCT) 3D imaging of proximal caries in posterior teeth using optical coherence tomography Detection and analysis of early degradation at resin-dentin interface by optical coherence tomography (OCT) and confocal laser scanning microscope (CLSM) Successful optical coherence tomography-guided stent ablation with rotational atherectomy for an underexpanded stent Avinger Initiates Full Commercial Launch of Tigereye(TM) Image-Guided CTO Crossing Catheter Evaluation of choroidal thickness in children with type 1 diabetes: the role of optical coherence tomography in diabetic retinopathy screening Evaluation of ocular hypoperfusion in patients with acromegaly by using optical coherence tomography angiography Retinal neurodegeneration in diabetic peripheral neuropathy by optical coherence tomography: a systematic review and meta-analysis Macular fibrosis in Coats’ disease demonstrated by Optical Coherence Tomography Angiography – new data toward pathophysiology