1. Tokyo Medical & Dental University

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    1. Mentioned In 106 Articles

    2. Optical Coherence Tomographic Imaging of Posterior Episclera and Tenon's Capsule

      Optical Coherence Tomographic Imaging of Posterior Episclera and Tenon's Capsule
      Purpose : To investigate structural features of the posterior episclera and Tenon's capsule in patients with high myopia. Methods : This hospital-based observational study included highly myopic eyes (myopic refractive error 8 diopters or axial length 26.5 mm) in which the posterior sclera in its full thickness could be visualized on swept-source optical coherence tomography (OCT) images in all 12 radial scans centered on the fovea. We assessed the posterior ...
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    3. Resolution characteristics of optical coherence tomography for dental use

      Resolution characteristics of optical coherence tomography for dental use
      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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    4. Three-Dimensional Analysis of Enamel Crack Behavior Using Optical Coherence Tomography

      Three-Dimensional Analysis of Enamel Crack Behavior Using Optical Coherence Tomography
      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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    5. 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 ...
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    6. The effectiveness of optical coherence tomography for evaluating peri-implant tissue: A pilot study

      The effectiveness of optical coherence tomography for evaluating peri-implant tissue: A pilot study
      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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    7. PERIPAPILLARY ARTERIAL RING OF ZINN-HALLER IN HIGHLY MYOPIC EYES AS DETECTED BY OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      PERIPAPILLARY ARTERIAL RING OF ZINN-HALLER IN HIGHLY MYOPIC EYES AS DETECTED BY OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY
      Purpose: To visualize the arterial circle of Zinn-Haller (ZHAC) in highly myopic patients by using OCT-A. Methods: Two hundred and fifty-three eyes of 146 consecutive patients with axial length =26.5 mm who underwent OCT-A centered onto the optic disk were studied. Results: Arterial circle of Zinn-Haller was detectable on OCT-A images within the area of the parapapillary myopic conus in 26 (10%) of 253 eyes. The ZHAC was annular ...
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    8. Impact of optical coherence tomography- and coronary angioscopy-assessed neointimal tissue characteristics on occurrence of periprocedural myonecrosis in patients with in-stent restenosis

      Impact of optical coherence tomography- and coronary angioscopy-assessed neointimal tissue characteristics on occurrence of periprocedural myonecrosis in patients with in-stent restenosis
      Several characteristics of neointimal tissues, including neoatherosclerotic progression, have been reported in lesions with in-stent restenosis (ISR). However, the effects of these characteristics on outcomes after percutaneous coronary intervention (PCI) for ISR lesions remain unclear. We assessed the relationships between neointimal tissue characteristics and the occurrence of periprocedural myonecrosis (PMN) after PCI in ISR lesions. We investigated 72 ISR lesions in 72 patients with stable angina pectoris (SAP) who underwent ...
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    9. 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 ...
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    10. Monitoring of cariogenic demineralization at the enamel–composite interface using swept-source optical coherence tomography

      Monitoring of cariogenic demineralization at the enamel–composite interface using swept-source optical coherence tomography
      Objectives The aim of this study was to evaluate enamel demineralization at composite restoration margins caused by cariogenic biofilm using swept-source optical coherence tomography (SS-OCT). Methods Sixty round-shaped cavities were prepared on the mid-buccal enamel surface of extracted human molars. The cavities were restored with Estelite Flow Quick flowable composite using either Clearfil SE Bond or Clearfil Tri-S Bond ND bonding agents. Streptococcus mutans suspension was applied to form a ...
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    11. Internal adaptation of resin composites at two configurations: Influence of polymerization shrinkage and stress

      Internal adaptation of resin composites at two configurations: Influence of polymerization shrinkage and stress
      Objective This study compared internal adaptation of composites under different C-factors and examined the relationship between internal adaptation and polymerization shrinkage parameters. Methods Cylindrical cavities 3 mm in diameter were prepared in 100 human third molars in two depths: 4 mm high C-factor (H-CF) or 1 mm low C-factor (L-CF). After adhesive application (Clearfil SE One, Kuraray Noritake), the composite was placed in two increments in three subgroups: Filtek Supreme ...
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    12. Characteristics of Peripapillary Staphylomas Associated with High Myopia Determined by Swept-source Optical Coherence Tomography

      Characteristics of Peripapillary Staphylomas Associated with High Myopia Determined by Swept-source Optical Coherence Tomography
      Purpose To analyze the morphological features of peripapillary staphylomas associated with high myopia by swept-source optical coherence tomography (OCT). Design Validity analysis. Methods Highly myopic patients (refractive error 8.0 diopters or axial length 26.5 mm) with a peripapillary staphyloma who had undergone swept-source OCT were studied. The non-highly myopic fellow eyes in patients with unilateral high myopia were also studied. The presence of a peripapillary staphyloma was determined ...
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    13. Impact of chronic kidney disease stages on atherosclerotic plaque components on optical coherence tomography in patients with coronary artery disease

      Impact of chronic kidney disease stages on atherosclerotic plaque components on optical coherence tomography in patients with coronary artery disease
      The progression of coronary atherosclerosis has been influenced by the presence of chronic kidney disease (CKD). This study investigated the impact of CKD stages on coronary plaque components observed on optical coherence tomography (OCT). We investigated 296 native coronary lesions with stable angina pectoris treated with stent implantation. All lesions were divided into the three groups according to the values of estimated glomerular filtration rate (eGFR, mL min 1 1 ...
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    14. The role of enamel thickness and refractive index on human tooth colour

      The role of enamel thickness and refractive index on human tooth colour
      Objectives To investigate the role of enamel thickness and refractive index ( n ) on tooth colour. Methods The colour and enamel thickness of fifteen extracted human central incisors were determined according to CIELab colour scale using spectrophotometer (Crystaleye) and swept-source optical coherence tomography (SS-OCT), respectively. Subsequently, labial enamel was trimmed by approximately 100 m, and the colour and remaining enamel thickness were investigated again. This cycle was repeated until dentin appeared ...
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  2. About Tokyo Medical & Dental University

    Tokyo Medical & Dental University

    Tokyo Medical and Dental University is unique among medical and dental universities in Japan in that we have four divisions dedicated to graduate education and research: Medical and Dental Sciences, Health Care Sciences, the Biomedical Sciences Education Division, and the Biomedical Sciences Research Division. TMDU comprises four faculties (Medicine, Dentistry, Health Care Sciences and Oral Health Care Sciences), an undergraduate College of Liberal Arts and Sciences, two research institutes (the Institute of Biomaterials and Bioengineering and the Medical Research Institute), a university hospital attached to the Faculty of Medicine, a university hospital attached to the Faculty of Dentistry, and a dental technologist school.