Dentistry -Optical Coherence Tomography News

Articles in category: Dentistry

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1. Physical Sciences Receives NIH Grant for Optical Prove for Real-Time Assessment of Periodontal Health Status
  
  Explore Optical Coherence Tomography News Apr 16 2019 Dentistry , Funding
  
  Physical Sciences Incorporated Received a 2019 NIH Grant for $641,715 for Optical Prove for Real-Time Assessment of Periodontal Health Status. The principal investigator is Nicusor Iftimia. The program began in 2013 and ends in 2020. Below is a summary of the proposed work. Physical Sciences, Inc. (PSI), in collaboration with The Forsyth Institute, Cambridge, MA is proposing to develop a technology that will address a major unmet medical need in periodontology: the lack of tools to quantitatively and objectively assess the health/disease status of the gingival soft tissues. The proposed technology will combine high resolution micro-Optical Coherence Tomography ...
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  Mentions: National Institutes of Health FDA Physical Sciences Incorporated
2. Analysis of Enamel Loss by Prophylaxis and Etching Treatment in Human Tooth Using Optical Coherence Tomography: An In Vitro Study
  
  Explore Hindawi Publishing Corporation Apr 9 2019 Dentistry
  
  Bonding of braces is an essential part in contemporary orthodontic treatment. For the proper strength of bracket bonding, enamel conditioning or surface treatment on tooth surface is required. Treatment on the tooth surface such as prophylaxis smoothing with pumice and enamel etching results in considerable damages to the enamel surface of the tooth. In this study, we have proposed optical coherence tomography as a noninvasive imaging technique for the evaluation of damage induced during such treatment procedures. Using depth intensity analysis of the obtained cross-sectional images, the damage resulting to the enamel surface was studied after prophylaxis smoothening and etching ...
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  Mentions: Jeehyun Kim Kyungpook National University Naresh Kumar Ravichandran
3. 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, generating an optical coherence tomographic image based on a scattering intensity value of the interference light, extracting a dental plaque region having a specific scattering intensity value from the optical ...
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  Mentions: Nobuyoshi Ozawa Yasunori Sumi National Center for Geriatrics and Gerontology in Japan
4. MODERN APPROACHES OF ANALYSIS AND TREATMENT OF ENDODONTIC LESIONS USING THE ENDOSCOPE AND THE OPTICAL COHERENCE TOMOGRAPHY
  
  Explore Romanian Journal of Oral Rehabilitation Apr 2 2019 Dentistry
  
  Aim of the study: The main reason of the present study is to analyze and record the evolution of two revolutionary methods in dental medicine with which endodontic treatments can be performed as well as the evaluation of their quality that appeared in the last twenty years. Materials and Methods: An electronic search was done on Research Gate, Science Direct and PubMed using terms about modern endodontic treatments between 1990 and 2019. Every article containing the terms of interest has been read carefully and selected according to its importance in this article. Terms used for search included: Endoscopy; Tooth Anatomy ...
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  Mentions: Cosmin Sinescu Victor Babes University of Medicine and Pharmacy Virgil-Florin Duma
5. Optical Coherence Tomography Investigations and Modeling of the Sintering of Ceramic Crowns
  
  Explore MDPI Open Access Journals Platform Mar 21 2019 Dentistry
  
  Dental prostheses are sintered in ovens that sometimes suffer from a loss of calibration. This can lead to variations of the sintering temperature outside the range recommended by the manufacturer. Stress and even fractures in dental ceramics may occur, and this leads to the necessity to rebuild the dental construct. The aim of this work is to monitor the quality of sintering processes using an established biomedical imaging technique—optical coherence tomography (OCT). Conventional current procedures imply the fabrication of supplemental samples that add to the expenses and are only evaluated visually. To our knowledge, we were the first to ...
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  Mentions: Adrian G. Podoleanu University of Kent Cosmin Sinescu
6. Fried Illuminates the Future of Dentistry
  
  Explore NIH Record Newsletter Feb 25 2019 Dentistry
  
  For anyone who dreads going to the dentist, there may be light at the end of the tunnel. Advances in laser and light-based imaging technologies may soon change the face of modern dentistry. Dr. Daniel Fried Tooth enamel is almost transparent at longer wavelengths, making it possible to shine near-infrared light on a tooth to detect dental decay. “You can see right into the tooth,” said Dr. Daniel Fried, professor, University of California, San Francisco School of Dentistry. “The enamel looks almost like an ice cube.” Light-based imaging is minimally invasive, providing a safer alternative to an X-ray’s ionizing ...
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  Mentions: Daniel S. Fried UCSF
7. Remineralizing Potential of Nano-Silver-Fluoride for Tooth Enamel: An Optical Coherence Tomography Analysis
  
  Explore Sistema Eletrônico de Revistas Feb 21 2019 Dentistry
  
  Objective: To evaluate the use of nanosilver fluoride in the enamel remineralization process through optical coherence tomography . Material and Methods: All samples were submitted to demineralization process by pH cycling during 14 days and randomly distributed into three groups (n = 11): Nanosilver Fluoride (NSF), Sodium fluoride (NaF), and negative control. Optical coherence tomography images were acquired at three different moments: initial stage (T0), post caries formation (T1), and post pH cycling (T2). The integrity of the enamel surface and the measurement of the volume loss for the tissue after pH cycling in comparison to initial images were obtained from optical ...
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  Mentions: Anderson S. L. Gomes Federal University of Pernambuco Cláudia Cristina Brainer Oliveira Mota
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 microcracks. Demineralization progression was divided into 4 types by depth: 0 for sound enamel and Type I, II, and III for enamel demineralization penetrating into the outer third, the middle ...
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  Mentions: University of Washington Yasunori Sumi Tokyo Medical & Dental University
9. Detection of enamel subsurface lesions by swept-source optical coherence tomography
  
  Explore jstage.jst.go.jp Feb 5 2019 Dentistry
  
  This study aimed to non-destructively analyze the progression of subsurface enamel caries using swept-source optical coherence tomography (SS-OCT), a recently developed imaging analysis modality. Artificial enamel caries at various stages of demineralization were created in bovine tooth enamel using a modified lactic acid gel system. Untreated enamel served as a control. OCT images from cross-sections of enamel were collected. Mineral density, distribution, and histological changes were analyzed using an electron probe microanalyzer, scanning electron microscopy, and contact microradiography. The Raman spectrum and X-ray structural analysis of the enamel surfaces were determined. SS-OCT detected significant differences in mineral loss among the ...
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  Mentions: Tohoku University
10. Evaluation of calculus imaging on root surfaces by spectral-domain optical coherence tomography
  
  Explore ScienceDirect Jan 28 2019 Dentistry
  
  Objective The aim of this in vitro study was to evaluate the ability of optical coherence tomography (OCT) to display calculus on root surfaces. Material and methods Ten teeth with calculus on the root surface were embedded in resin, omitting the root surface. A region of interest (ROI) was marked by small drill holes coronally and apically of the calculus and imaged by spectral-domain optical coherence tomography ([SD OCT], Telesto SP5, centre wavelength 1310 nm) and light microscopy (LM). To evaluate the impact of different fluids on calculus visualisation, using OCT, root surfaces were covered by a layer of NaCl ...
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  Mentions: University of Leipzig Thorlabs OCT Imaging Systems
11. Non-ionized, High-resolution Measurement of Internal and Marginal Discrepancies of Dental Prosthesis Using Optical Coherence Tomography
  
  Explore IEEE Xplore Dec 25 2018 Dentistry
  
  An internal and marginal fit between prosthesis and abutment are important factors of the durability of dental prosthesis. In this study we have proposed the use of swept-source optical coherence tomography (SS-OCT) as a novel application for non-ionized and high-resolution measurements of internal and marginal discrepancies at anatomically critical four points, such as occlusal, angle, axial, and margin during prosthesis attachment. A tooth model was fabricated by 3D printing technique and the dental prosthesis was designed using dental CAD software. The cross-sectional images along with intensity peak profile analysis of the sample were acquired using OCT system for measurements of ...
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  Mentions: Kyungpook National University Ruchire Eranga Wijesinghe
12. Polymerization shrinkage of bulk fill composite through optical coherence tomography
  
  Explore Dental Materials Dec 3 2018 Dentistry
  
  No abstract provided
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13. Automated Segmentation of Dental Calculus in Optical Coherence Tomography Images
  
  Explore Sensors and Materials Nov 27 2018 Dentistry
  
  The presence of dental calculus is highly correlated with the formation and advancement of periodontal disease. The occurrence and relapse of periodontal disease can be prevented only if dental calculus is completely removed. In this study, optical coherence tomography (OCT) is used to obtain two-dimensional cross-sectional images of tooth samples, in conjunction with a segmentation technique that enables automatic identification of dental calculus. We propose the vertical intensity transform function to correct the nonuniform instrument signal intensity caused by OCT. Afterwards, the detection ranges are defined by K-means or the Markov random field (MRF), and the candidate range is selected ...
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14. Evaluation of Optical Coherence Tomography in Dentistry
  
  Explore Home - ClinicalTrials.gov Nov 26 2018 Dentistry , Clinical Trials
  
  Optical coherence tomography (OCT) is a medical diagnostic tool, providing non-invasive, non-radiative and high resolution imaging. OCT has been established since many years in ophthalmology. In dentistry the diagnostic potential of OCT is currently increasingly being noticed. This clinical study includes two individual trials: (i) Longitudinal assessment of surface sealant thickness using optical coherence tomography and (ii) comparison of crevicular fluid levels of inflammatory cytokines after the application of surface sealants.
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  Mentions: University of Heidelberg
15. Visualization of the pulp chamber roof and residual dentin thickness by spectral-domain optical coherence tomography in vitro
  
  Explore Home - Springer Nov 17 2018 Dentistry
  
  The aim of this study was to evaluate the ability of spectral-domain optical coherence tomography (SD-OCT) to display the roof of the pulp chamber and to estimate the residual dentin thickness (RDT) of the pulp complex. The roots of 20 extracted human molars were embedded in epoxy resin, and crowns were longitudinally sectioned in the mesial-distal direction, exposing the pulp chamber. The coronal part of the crown was removed up to an RDT to the pulp chamber roof of 2 mm. Samples were imaged by SD-OCT from coronal view and by light microscopy (LM) in the sagittal plane. Using a ...
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  Mentions: University of Leipzig
16. Optical coherence tomography imaging system
  
  Explore uspto.gov Nov 13 2018 Dentistry , Patents
  
  An imaging system, a method for imaging an object of interest, and an image of the object of interest. In one embodiment, an imaging system includes a channel configured to receive information from an object of interest, a 3DSS sub-system configured to capture information from the object of interest and generate at least one of 3D surface data or 3D position data based on the information captured by the 3DSS sub-system, and an OCT sub-system configured to perform a line scan of light reflected from the object of interest, generate OCT image data from the line scan, receive the at ...
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17. Dental Innovations Award 2018 is awarded to project group Dental-OCT
  
  Explore mll-luebeck.com Nov 6 2018 Dentistry
  
  The Foundation for “Innovative Zahnmedizin” awards the “Dental Innovation Award 2018” in the category “Innovative Idea / Invention” to the Dental-OCT project group. Within a project funded by the AiF (Arbeitsgemeinschaft innovative Forschung), the project group consisting of the Medical Laser Center Lübeck, the Poliklinik für Zahnerhaltung und Parodontologie des Universitätsklinikum Leipzig AöR and Orange Dental GmbH realized an intraoral OCT probe to improve the restorative caries treatment. The prize was awarded to the winners at the annual meeting of the “Deutsche Gesellschaft zur Zahnerhaltung”. The award of € 3,500 will be split to the project team ...
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18. Histologic validation of ICDAS‐II and polarization sensitive optical coherence tomography to detect smooth surface early carious lesions
  
  Explore Wiley Online Library Nov 6 2018 Dentistry
  
  Aim This in vitro study aimed to histologically validate and compare the methods for detection of smooth surface early carious lesions (ECLs) that is , International caries detection and assessment system for the smooth surface (ICDAS‐II‐SSC), Polarization sensitive optical coherence tomography (PS‐OCT), and radiography. Methodology PS‐OCT images for scores 0‐3 of ICDAS‐II‐SSC were standardized according to ECLs’ depth. Preliminary PS‐OCT images for ICDAS‐II‐SSC score‐2 of pigmented ECLs showed reduced lesion depth and therefore were dichotomized into scores 2 and 2p for white and pigmented lesions (ICDAS‐II‐SSCm). ECLs on ...
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19. Is Optical Coherence Tomography a Potential Tool to Evaluate Marginal Adaptation of Class III/IV Composite Restorations In Vivo?
  
  Explore Operative Dentistry Oct 16 2018 Dentistry
  
  Objective: Margin analysis of Class III and IV composite restorations in vitro and in vivo occurred by scanning electron microscopy (SEM) and optical coherence tomography (OCT). The results were compared and related to clinical evaluation. Methods and Materials: Eight Class III composite restorations were imaged in vitro using OCT and SEM. The margins were analyzed quantitatively. OCT signals were verified by assignment to the criteria perfect margin, gap, and positive/negative ledge. In vivo quantitative margin analysis of Class III/IV composite restorations made of the micro-hybrid composite Venus combined with the self-etch adhesive iBond Gluma inside (1-SE) or etch-and-rinse ...
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  Mentions: University of Leipzig
20. Assessing surface characteristics of eroded dentine with optical coherence tomography: a preliminary in vitro validation study
  
  Explore OSA | OSA Publishing Oct 4 2018 Dentistry
  
  We conducted the first pilot study to investigate the use of the attenuation coefficient from an optical coherence tomography (OCT) backscattered signal as a measure of surface roughness changes in eroded dentine at an early stage of the erosion process. Ten human premolar root samples were subjected to citric acid treatment before scanning by OCT. The extracted relative attenuation coefficient (
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21. Visualization of interfacial adhesive defects at dental restorations with spectral domain and polarization sensitive optical coherence tomography
  
  Explore Home Oct 2 2018 Dentistry
  
  Restoration loss based on interfacial adhesive defects and associated caries at the restoration margin are the main causes for invasive replacement of dental restorations. Assessment of the interfacial quality based on clinical inspection and radiographic examination is often difficult and not reliable. In this work, we present spectral domain optical coherence tomography (SDOCT) and polarization sensitive optical coherence tomography (PSOCT) for the evaluation of tooth-composite bond failure. Imaging of two composite restorations at the occlusal surface are presented using intensity-based images obtained by SDOCT and PSOCT based degree of polarization uniformity (DOPU). Both modalities revealed several defects beneath the surface ...
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  Mentions: Julia Walther Dresden University of Technology Edmund Koch
22. Optical coherence tomography follow‐up of patients treated from periodontal disease
  
  Explore Wiley Online Library Sep 27 2018 Dentistry
  
  Optical coherence tomography (OCT) is one of the most important imaging modalities for biophotonics applications. In this work, an important step towards the clinical use of OCT in dental practice is reported, by following‐up patients treated from periodontal disease (PD). 147 vestibular dental sites from 14 patients diagnosed with PD were evaluated prior and after treatment, using a swept‐source OCT and two periodontal probes (Florida probe and North Carolina) for comparison. The evaluation was performed at four stages: day 0, day 30, day 60 and day 90. Exceptionally one patient was evaluated 1‐year after treatment. It was ...
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  Mentions: Anderson S. L. Gomes Federal University of Pernambuco Luana Osório Fernandes
23. A non‐invasive imaging and measurement using optical coherence tomography angiography for the assessment of gingiva: An in vivo study
  
  Explore Wiley Online Library Aug 16 2018 Dentistry
  
  Gingiva is the soft tissue that surrounds and protects the teeth. Healthy gingiva provides an effective barrier to periodontal insults to deeper tissue, thus is an important indicator to a patient’s periodontal health. Current methods in assessing gingival tissue health, including visual observation and physical examination with probing on the gingiva, are qualitative and subjective. They may become cumbersome when more complex cases are involved, such as variations in gingival biotypes where feature and thickness of the gingiva are considered. A non‐invasive imaging technique providing depth‐resolved structural and vascular information is necessary for an improved assessment of ...
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  Mentions: Oregon Health & Science University University of Washington Ruikang K. Wang
24. Comparative study on the detection of early dental caries using thermo-photonic lock-in imaging and optical coherence tomography
  
  Explore OSA | OSA Publishing Aug 3 2018 Dentistry
  
  Early detection of dental caries is known to be the key to the effectiveness of therapeutic and preventive approaches in dentistry. However, existing clinical detection techniques, such as radiographs, are not sufficiently sensitive to detect and monitor the progression of caries at early stages. As such, in recent years, several optics-based imaging modalities have been proposed for the early detection of caries. The majority of these techniques rely on the enhancement of light scattering in early carious lesions, while a few of them are based on the enhancement of light absorption at early caries sites. In this paper, we report ...
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