1. Articles in category: Dentistry

    481-504 of 531 « 1 2 ... 18 19 20 21 22 23 »
    1. Lantis Laser Secures Exclusive Worldwide Rights to AXSUN's Advanced Tunable Laser Engine for its OCT Dental Imaging System

      DENVILLE, N.J., June 3, 2008 -- Lantis Laser Inc. announced today it has signed a Strategic Agreement with AXSUN Technologies, of Billerica, MA, whereby AXSUN will manufacture and supply the Integrated Optical Coherence Tomography Engine for Lantis' OCT Dental Imaging System, to be introduced to dentistry in the first quarter of 2009.
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    2. Apparatus For Dental Oct Imaging (Wo 2008/063605)

      An apparatus (10) for obtaining an image of a tooth (20) includes an image sensor and a white light source (12) providing broadband polychromatic light and an ultraviolet light source providing narrow-band light. A combiner (15) directs broadband polychromatic light and narrow band light along a common illumination path to illuminate the tooth. A polarization beamsplitter (18) directs polarized light from the illumination path along an optical axis (216). An optical coherence tomography (OCT) imaging apparatus (70) splits the low coherence light into a sample path and a reference path and a dichroic element (78) directs the polarized illumination and ...

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    3. Diagnosis of Vertical Root Fractures with Optical Coherence Tomography

      The purpose of this experiment was to evaluate the ability of optical coherence tomography (OCT) to image vertical root fractures (VRFs). Twenty-five mandibular premolars were prepared to size 50. Five teeth served as controls. Group 1 (n = 10) was treated with ethylenediaminetetraacetic acid and ultrasonic irrigation, whereas group 2 (n = 10) received no further treatments. Teeth from groups 1 and 2 were fractured, and the presence of a fracture line was demonstrated microscopically. Control group teeth were not subjected to any force. Teeth were pooled and scanned with an OCT fiber. The resulting video files were blindly interpreted by 2 ...
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    4. Diagnosis of vertical root fractures with optical coherence tomography.

      Related Articles Diagnosis of vertical root fractures with optical coherence tomography. J Endod. 2008 Jun;34(6):739-42 Authors: Shemesh H, van Soest G, Wu MK, Wesselink PR The purpose of this experiment was to evaluate the ability of optical coherence tomography (OCT) to image vertical root fractures (VRFs). Twenty-five mandibular premolars were prepared to size 50. Five teeth served as controls. Group 1 (n = 10) was treated with ethylenediaminetetraacetic acid and ultrasonic irrigation, whereas group 2 (n = 10) received no further treatments. Teeth from groups 1 and 2 were fractured, and the presence of a fracture line was demonstrated ...
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    5. Fibres reinforced dentures investigated with en-face optical coherence tomography

      Meda L. Negrutiu, Cosmin Sinescu, Michael Hughes et al. The complete dentures are currently made using different technologies. In order to avoid deficiencies of the prostheses made using the classical technique, several alternative procedures have been devised. In order to enhance the mechanical strength, complete denture bases are reinforced with fibres ... [Proc. SPIE Int. Soc. Opt. Eng. 6991, 69911U (2008)] published Fri May 2, 2008.
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    6. Root canal filling evaluation using optical coherence tomography

      Meda L. Negrutiu, Cosmin Sinescu, Michael Hughes et al. The root canal fillings are destined to seal the root canal especially in the apical areea. Invasive techniques are known which are used to assess the quality of the seal. These lead to the destruction of the probes and often no conclusion could be drawn in respect to the existence of any microleaka ... [Proc. SPIE Int. Soc. Opt. Eng. 6991, 69911T (2008)] published Fri May 2, 2008.
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    7. Investigation of bracket bonding for orthodontic treatments using en-face optical coherence tomography

      Cosmin Sinescu, Meda L. Negrutiu, Michael Hughes et al. Despite good diagnosis and treatment planning, orthodontic treatment can fail if bonding fails. It is now common practice to address the aesthetic appearance of patients using aesthetic brackets instead of metal ones. Therefore, bonding aesthetic brackets has become an issue for orthodontists today. ... [Proc. SPIE Int. Soc. Opt. Eng. 6991, 69911M (2008)] published Fri May 2, 2008.
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    8. An optical coherence tomography investigation of materials defects in ceramic fixed partial dental prostheses

      Cosmin Sinescu, Meda Negrutiu, Michael Hughes et al. Metal ceramic and integral ceramic fixed partial prostheses are mainly used in the frontal part of the dental arch because for esthetics reasons. The masticatory stress may induce fractures of the bridges. There are several factors that are associated with the stress state created in ceramic restora ... [Proc. SPIE Int. Soc. Opt. Eng. 6991, 69910O (2008)] published Fri May 2, 2008.
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    9. Early dental caries detection using a fibre-optic coupled polarization-resolved Raman spectroscopic system

      A new fibre-optic coupled polarization-resolved Raman spectroscopic system was developed for simultaneous collection of orthogonally polarized Raman spectra in a single measurement. An application of detecting incipient dental caries based on changes observed in Raman polarization anisotropy was ... [Opt. Express 16, 6274-6284 (2008)]

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    10. Optical coherence tomography imaging

      Optical coherence tomography imaging
      A digitized image of an object may include representations of portions of the object that are obscured, occluded or otherwise unobservable. The image may be a multi-dimensional visual representation of dentition. Characteristics of the dentition and its surfaces, contours, and shape may be determined and/or analyzed. A light may be directed toward and reflected from the dentition. The reflected light may be combined with a reference to determine characteristics of the dentition, including obscured areas such as subgingival tissue.
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    11. Optical coherence tomography imaging

      A digitized image of an object may include representations of portions of the object that are obscured, occluded or otherwise unobservable. The image may be a multi-dimensional visual representation of dentition. Characteristics of the dentition and its surfaces, contours, and shape may be determined and/or analyzed. A light may be directed toward and reflected from the dentition. The reflected light may be combined with a reference to determine characteristics of the dentition, including obscured areas such as subgingival tissue.
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    12. LOW COHERENCE DENTAL OCT IMAGING

      (WO/2008/033217) CARESTREAM HEALTH, INC. [US/US]; 150 Verona Street, Rochester, NY 14608 (US) (All Except US). LIANG, Rongguang [CN/US]; 16 Millford Crossing, Penfield, New York 14526 (US) (US Only). MARCUS, Michael A. [US/US]; 9 Mendonshire Drive, Honeoye Falls, New York 14472 (US) (US Only). BURNS, Peter D. [US/US]; 36 Norbrook Road, Fairport, New York 14450 (US) (US Only). WONG, Victor C. [US/US]; 44 Brightwoods Lane, Rochester, New York 14623 (US) (US Only).

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    13. Optical imaging of hard and soft dental tissues using discretely swept optical frequency domain reflectometry optical coherence tomography at wavelengths from 1560 to 1600 nm .

      Optical imaging of hard and soft dental tissues using discretely swept optical frequency domain reflectometry optical coherence tomography at wavelengths from 1560 to 1600 nm (Journal Paper) Author(s): Hideo Kakuma; Kohji Ohbayashi; Yasuhiko Arakawa We have been developing a Mach-Zehnder type of optical frequ
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    14. Fixed partial dentures investigated by optical coherent tomography

      Cosmin Sinescu, Meda Negrutiu, Carmen Todea et al. Fixed partial prostheses as integral ceramics, integral polymers, metal ceramics or metal polymers bridges, are mainly used in the frontal part of the dental arch (especially the integral bridges). They have to satisfy high stress requirements as well as esthetic. The masticatory stress may induce f ... [Proc. SPIE Int. Soc. Opt. Eng. 6847, 684707 (2008)] published Mon Feb 18, 2008.
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    15. Imaging of hard- and soft-tissue structure in the oral cavity by optical coherence tomography.

      Imaging of hard- and soft-tissue structure in the oral cavity by optical coherence tomography. Appl Opt. 1998 Jun 1;37(16):3582-5 Authors: Colston BW, Everett MJ, Da Silva LB, Otis LL, Stroeve P, Nathel H We have developed a prototype optical coherence tomography (OCT) system for the imaging of hard and soft tissue in the oral cavity. High-resolution images of in vitro porcine periodontal tissues have been obtained with this system. The images clearly show the enamel-cementum and the gingiva-tooth interfaces, indicating OCT is a potentially useful technique for diagnosis of periodontal diseases. To our knowledge, this is the ...
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    16. Optical coherence tomography imaging for evaluating the photo biomodulation effects on tissue regeneration in the oral cavity

      Craig B. Gimbel Optical Coherence Tomography (OCT) is a noninvasive method for imaging dental microstructure which has the potential of evaluating the health of periodontal tissue. OCT provides an "optical biopsy" of tissue 2-3 mm in depth. Optical biopsy is a measurement of the localized optical properties based o ... [Proc. SPIE Int. Soc. Opt. Eng. 6846, 68460H (2008)] published Tue Feb 12, 2008.
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    17. High-resolution PS-OCT of enamel remineralization

      Anna M. Can, Cynthia L. Darling, and Daniel Fried Previous studies have demonstrated that Polarization Sensitive Optical Coherence Tomography (PS-OCT) can be used to image the remineralization of early artificial caries lesions. However, the depth resolution of the imaging system employed in those previous studies was limited and the outer surface ... [Proc. SPIE Int. Soc. Opt. Eng. 6843, 68430T (2008)] published Mon Feb 11, 2008.
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    481-504 of 531 « 1 2 ... 18 19 20 21 22 23 »
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