Dental Patents (Class 348/66)
  • Patent number: 10327693
    Abstract: Methods for tracking gum line changes by comparing digital 3D models of teeth and gingiva taken at different times. The digital 3D models are segmented to digitally identify the teeth from the gingiva, and the segmented digital 3D models are compared to detect gum line changes by determining differences between them relating to the gum line. Gum line changes can also be estimated by comparing one of the digital 3D models with a 3D model having a predicted original location of the gum line. Gum line change maps can be displayed to show the gum line changes determined through the tracking or estimating of changes. The digital 3D models can also be displayed with periodontal measurements placed upon them.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: June 25, 2019
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Alexandra R. Cunliffe, Guruprasad Somasundaram, Benjamin D. Zimmer, Steve Lastavich, Peter See, Kelly L. Stein
  • Patent number: 10321975
    Abstract: A method for continuously evaluating the effectiveness of debridement of a root canal of a tooth, the tooth having an open access cavity and an apex end, includes delivering a fluid to the open access cavity of the tooth, evacuating the fluid near the apex end of the tooth such that the fluid flushes most of the root canal before being evacuated, and continuously evaluating the evacuated fluid for at least one of a presence of debris, a concentration level of the debris, or a type of the debris. An apparatus for use in debriding a root canal of a tooth includes a microcannula or a macrocannula configured to evacuate a fluid in the root canal, and a sensing mechanism fluidically coupled to the microcannula or the macrocannula, the sensing mechanism configured to continuously sense debris in the evacuated fluid in real time.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: June 18, 2019
    Assignee: Ormco Corporation
    Inventors: Steven Joseph Burns, Emanuele Maretto, Abhigyan Som, Carlos Alberto Munoz, Matteo Bosisio, Gopikrishnan Soundararajan, Tuyen Nguyen, M. Reza Mehrabi
  • Patent number: 10258227
    Abstract: Bilateral illumination attachment for dental camera is a light source that is reversibly attachable to any dental camera. Bilateral illumination attachment for dental camera has two light sources that directly face each other. When properly attached to a dental camera, bilateral illumination attachment for dental camera effectuates sub-enamel illumination or bilateral illumination of a tooth, so that the dental camera may capture a photo or image of the illuminated tooth. Bilateral illumination attachment for dental camera has a specially shaped rigid body that makes a slip-fit, press-fit, or snap-fit with the exterior surface of any dental camera. The distal end of specially shaped rigid body is sterilizeable. Bilateral illumination attachment for dental camera has a plurality of replaceable tooth cups where each tooth cup contains the two light sources. Replaceable tooth cups are placed on the tooth to effectuate sub-enamel illumination or bilateral illumination. Replaceable tooth cups are sterilizeable.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: April 16, 2019
    Assignee: Digital Doc LLC
    Inventors: David D. Wilson, John W. Sellers
  • Patent number: 9974433
    Abstract: A dental mirror instrument has a light waveguide and an airflow conduit that extend along the length of an elongated member to a mirror portion. An airflow exiting from the airflow conduit may be directed over the mirror surface to remove fluids and debris. Light from a light source is transmitted along the light waveguide and is reflected off of a back-side of a land portion through a Fresnel lens to produce a task light. A mirror may have a hydrophobic surface and this surface may have raised portions or a patterned surface that further enhances the removal of fluids or debris. The optical component of the dental instrument may be detachable to a source component and may be disposable. A flexible connector may be coupled with the source component to provide an airflow to the airflow conduit and/or electrical power to the light source.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: May 22, 2018
    Assignee: STAYCLEAR DENTAL MIRROR LLC
    Inventors: Jeffrey A Watson, James L Manniso, Mark L Manniso, David D McClanahan, James Eldon
  • Patent number: 9955872
    Abstract: Described are embodiments of methods of obtaining three-dimensional (3D) surface data of an object scene such as an intra-oral cavity. For example, measured surfaces may include the enamel surface of teeth, the dentin substructure of teeth, gum tissue and various dental structures. The methods can also be applied in medical applications and other applications in which 3D measurement data are acquired with maneuverable 3D measurement devices. In certain embodiments, the measurement device is positioned and translated to enable 3D data to be acquired for a backbone 3D data set. Subsequent controlled motion of the measurement device enables additional 3D data to be acquired and accurately joined to the backbone 3D data set.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: May 1, 2018
    Assignee: DENTAL IMAGING TECHNOLOGIES CORPORATION
    Inventors: Robert F. Dillon, Andrew F. Vesper, Timothy I. Fillion
  • Patent number: 9833213
    Abstract: A method, system and program product are provided for planning an intervention procedure in a body lumen. A CT scan of the body lumen is performed. A virtual rendering is created of the inside of the body lumen corresponding to an interventional camera image. Then a virtual tape corresponding to a planned path for the intervention procedure is projected onto a wall of the body lumen. The virtual tape is projected onto the lumen wall, which is relatively distant from the camera point on the virtual rendering, so the tape does not appear to oscillate like a central thread. Also, since the virtual tape is located on the lumen wall, it does not occlude the center of the lumen, allowing a user to better visualize the lumen during planning, during fly through, and even during an actual intervention.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: December 5, 2017
    Assignee: Koninklijke Philips N.V.
    Inventors: Rafael Wiemker, Tobias Klinder, Martin Bergtholdt
  • Patent number: 9763746
    Abstract: A method for providing a guided relative movement of a first object and a second object includes obtaining the first object; obtaining the second object and a 3D model of the second object, and deriving from the 3D model a first preferred relative arrangement between the first and second objects; obtaining a pre-process plan describing a preferred path for the relative movement of the first and second objects towards the first preferred relative arrangement; performing a movement procedure that includes 3D scanning at least a region of said second object using the 3D scanner and determining a present relative arrangement of the first and second objects from a result of the 3D scanning; calculating information for correcting in real-time for deviation in the relative movement from the preferred path; and providing a relative movement of the first and second objects towards the first preferred relative arrangement.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: September 19, 2017
    Assignee: 3SHAPE A/S
    Inventors: Nikolaj Deichmann, Rune Fisker
  • Patent number: 9584771
    Abstract: Systems and methods for improved thermophotonic imaging are provided in which both amplitude and phase image information is obtained with a high signal to noise ratio and depth-resolved capabilities. Image data obtained from an imaging camera is dynamically averaged and subsequently processed to extract amplitude and/or phase image data. The system may be configured for a wide range of imaging modalities, including single frequency modulation (thermophotonic lock-in imaging), Thermal-Wave Radar imaging or Thermophotonic Radar imaging involving chirp modulation, and Binary Phase Coded Modulation. Such imaging modalities may find application in many diverse areas, including non-destructive testing and biomedical diagnostic imaging including the imaging of teeth and monitoring changes in the tooth over time which are due to pathology such as dental caries or erosion.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: February 28, 2017
    Inventors: Andreas Mandelis, Nima Tabatabaei, Stephen Abrams
  • Patent number: 9480539
    Abstract: A viewing system includes a detector of electromagnetic radiation (EMR); and a control system connected to receive signals from the detector, and configured to identify an image locator, disposed within a field of view of the detector in use, and select for detection by the detector the image locator or an image located by the image locator. A viewing method includes detecting electromagnetic radiation from an image locator disposed within a field of view of a detector; identifying the image locator with a control system; and displaying the image locator or an image located by the image locator on one or more displays.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: November 1, 2016
    Inventor: James Ortlieb
  • Patent number: 9463081
    Abstract: A system for capturing and displaying an image of an entire oral cavity includes a handheld intraoral camera and a computer processor. Each of left and right panoramic tooth row images is generated by combining a first digital still image including the center of the front teeth with a second digital still image taken adjacent to the first digital still image and having an overlapping portion with the first digital still image, to form a first combined image. This step is repeated until a last digital still image positioned at the back tooth of the respective row is combined with a last combined image, forming the left or right panoramic tooth row image. The left and right panoramic tooth row images are superposed in an area of the center of the front teeth to form the full panoramic tooth row image.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: October 11, 2016
    Assignee: Kabushiki Kaisya Advance
    Inventor: Nobuchika Urakabe
  • Patent number: 9204788
    Abstract: An autofocus method for an intra-oral camera modulates the focus of a liquid lens in a cycle that has at least first, second, and third focus positions and obtains an image at each focus position, measuring focus of the obtained image. The position of the liquid lens is adjusted according to the measured focus. Steps of modulating the focus of the liquid lens in the cycle with at least first, second, and third focus positions, and obtaining the image at each focus position and measuring focus of the obtained image are repeated.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: December 8, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Zaiguang Yu, Guijian Wang, Zhaohua Liu
  • Patent number: 9167955
    Abstract: A protective cap for use on arthroscopic instruments and sheaths disposed over arthroscopic instruments. The cap protects the distal end of the instrument from accidental damage caused by other instruments used during a surgical procedure. The portion of the cap that covers a view port on an arthroscope is transparent in order to allow a user to see through the instrument and through the cap.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: October 27, 2015
    Assignee: Cannuflow, Inc.
    Inventor: Theodore R. Kucklick
  • Patent number: 9041793
    Abstract: A method of using a scanning microscope to rapidly form a digital image of an area. The method includes performing an initial set of scans to form a guide pixel set for the area and using the guide pixel set to identify regions representing structures of interest in the area. Then, performing additional scans of the regions representing structures of interest, to gather further data to further evaluate pixels in the regions, and not scanning elsewhere in the area.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: May 26, 2015
    Assignee: FEI COMPANY
    Inventors: Cliff Bugge, Brandon van Leer
  • Patent number: 9030541
    Abstract: An endoscope system includes: a photoelectric conversion element; a contour enhancing section that detects an edge component in a picked-up image subjected to the photoelectric conversion, thereby generating a contour enhancement signal; an electronic zoom region determining section that determines an electronic zoom region in the picked-up image based on a strength of the contour enhancement signal; an instruction section that provides an instruction for enlargement/reduction of the image; a parameter setting section that sets a zoom parameter for an electronic zoom section according to the instruction provided by the instruction section; and the electronic zoom section that performs an electronic zoom of the picked-up image for the electronic zoom region determined, according to the parameter set by the parameter setting section.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: May 12, 2015
    Assignee: Olympus Medical Systems Corp.
    Inventors: Yuji Kutsuma, Keisuke Tsutsui
  • Patent number: 9020228
    Abstract: A method for identifying tooth regions. The method includes generating a first threshold image from a first tooth image by selecting intensity data values higher than a first predetermined threshold value c1; generating a second threshold image from a second tooth image by selecting intensity data values higher than a second predetermined threshold value c2; generating a preliminary tooth regions image that defines at least a first tooth region from the intersection of the first and second threshold images; generating a reference binary image from the first image by selecting intensity data values higher than a third predetermined threshold value c3, wherein threshold value c3 exceeds c1; and generating a refined tooth regions image from at least the first tooth region in the preliminary tooth regions image. The first tooth region is connected to objects in the reference binary image.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: April 28, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Jiayong Yan, Wei Wang, Liangliang Pan, Victor C. Wong
  • Patent number: 8982200
    Abstract: An intraoral camera including a main body case, an intraoral insertion component mounted on the front side of the main body case, an imaging window provided to the intraoral insertion component, and an imaging device that is optically linked to the imaging window and is disposed inside the main body case or inside the intraoral insertion component. Illumination elements are disposed at portions of an outer peripheral wall face that are substantially opposite each other in the horizontal direction. These illumination elements are inclined toward the outside of the imaging window in the center of the imaging window, and the outer peripheral wall face that is substantially opposite these illumination elements in the vertical direction is constituted as a light collecting face that is inclined toward the outside of the imaging window in the center of the imaging window.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: March 17, 2015
    Assignee: Panasonic Healthcare Holdings Co., Ltd.
    Inventors: Yasuhisa Kitaoka, Toshiaki Ueta, Yoshiki Ishikawa, Mitsuhiro Iwata
  • Patent number: 8982198
    Abstract: An image signal correction apparatus includes: a frame memory configured to hold input image signals corresponding to a predetermined number of frames; a difference calculation unit configured to calculate a difference signal between an input image signal and each of the image signals held in the frame memory; a filter unit configured to pass a difference signal having a value equal to or smaller than a threshold value; and a control unit configured to change the threshold value of the filter unit in accordance with the value of the difference signal calculated in the difference calculation unit.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: March 17, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takashi Tsuda
  • Patent number: 8982201
    Abstract: A surface mapping and generating device which has devices for the process and/or cost optimization, in particular raw material recovery devices, an automatic control of the intensity of a used laser light, devices for carrying out a calibrating procedure by evaluating overlap errors at matching points, devices for archiving especially three-dimensional data of the jaw and/or for modeling the bite position of the upper and the lower jaws, devices for the optimized preparation of at least one dental stump for the production and placement of a dental prosthesis thereon and/or devices for taking into consideration the bite position of the upper and lower jaws.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: March 17, 2015
    Assignee: Institut Straumann AG
    Inventors: Gerhard Weber, Albert Mehl, Stephan Holzner, Wolfram Gloger
  • Patent number: 8922635
    Abstract: A surface mapping and generating device which has devices for the process and/or cost optimization, in particular raw material recovery devices, an automatic control of the intensity of a used laser light, devices for carrying out a calibrating procedure by evaluating overlap errors at matching points, devices for archiving especially three-dimensional data of the jaw and/or for modeling the bite position of the upper and the lower jaws, devices for the optimized preparation of at least one dental stump for the production and placement of a dental prosthesis thereon and/or devices for taking into consideration the bite position of the upper and lower jaws.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: December 30, 2014
    Assignee: Institut Straumann AG
    Inventors: Gerhard Weber, Albert Mehl, Stephan Holzner, Wolfram Gloger
  • Patent number: 8913814
    Abstract: A scanner is used for scanning an object (3, 4, 5), in particular a tooth or a plurality of teeth or a dental cast. The scanner (1) comprises a projector (2) for projecting a pattern (7) onto the object (3, 4, 5) and a camera which comprises a recording optics and an image sensor (18). To improve such scanner, the recording optics comprises a first imaging optics (9) and a second imaging optics (10).
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: December 16, 2014
    Assignee: Steinbichler Optotechnik GmbH
    Inventor: Michael Gandyra
  • Publication number: 20140313299
    Abstract: A camera head of a dental camera for detecting caries in an interdental space has an illuminating device for illuminating a tooth adjacent to the interdental space, which includes an infrared light source. The camera head further includes optics which have an image plane and an object plane, wherein an image sensor is located in the image plane, and the object plane divides the space into two half spaces, wherein a first half space contains the optics and is located in front of the object plane, and a second half space is located behind the object plane, both as seen from the optics. The illuminating device and the optics are designed and arranged with respect to one another in such a way that the illuminating device is arranged in the first half space and infrared light exiting the illuminating device is aimed in the direction of the second half space.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 23, 2014
    Applicant: Dürr Dental AG
    Inventors: Herbert Gebhardt, Peter Lais, Raimund Maier
  • Patent number: 8866894
    Abstract: A method for displaying live video of a tooth identifies a tooth tissue region in a viewable image frame obtained from a video stream and processes pixel data within the tooth tissue region to identify a suspected caries site. Intensity values for pixels that correspond to the suspected caries site are modified and a highlighted viewable image frame is formed as a combination of the modified intensity values corresponding to the suspected caries site and other pixel values in the viewable image frame. The highlighted viewable image frame is displayed in video form.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: October 21, 2014
    Assignee: Carestream Health, Inc.
    Inventors: Victor C. Wong, Gary M. Spinelli, Peter D. Burns, Paul O. McLaughlin, Jean Marc Inglese
  • Patent number: 8830309
    Abstract: A hierarchical pattern matching process is improved for use in three-dimensional reconstruction by calculating a disparity field for low-resolution data, and using this low-resolution disparity field to estimate the disparity field for higher-resolution images. By pre-warping a template according to the estimated disparity field, improved correlation results can be obtained.
    Type: Grant
    Filed: January 4, 2009
    Date of Patent: September 9, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Janos Rohaly, Ilya A. Kriveshko
  • Patent number: 8803958
    Abstract: Disclosed herein are various techniques for improving global path optimization in a system that uses camera path for three-dimensional reconstruction. A subset of frames of data for the global path, the key frames, may be used to reduce the computational complexity of the optimization, while preserving full three-dimensional detail in the optimized model by relating other measurements to the optimized key frame path.
    Type: Grant
    Filed: January 4, 2009
    Date of Patent: August 12, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Hongsheng Zhang, Benjamin FrantzDale
  • Patent number: 8780190
    Abstract: The invention relates to an intra-oral camera having an imaging system for depicting the object located in front of an observation window of the camera on a recording unit, wherein the imaging system has at least one focusing unit for setting a suitable focus and an aperture unit for forming a variable aperture. The setting of the aperture is carried out independently of the focus adjusted by the focusing unit.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: July 15, 2014
    Assignee: Kaltenbach & Voigt GmbH
    Inventors: Andre Hackel, Florian Bühs, Heinz Lehr, Stephen Schrader
  • Publication number: 20140132747
    Abstract: A digital intra-oral panoramic arch camera can provide a single panoramic image easily taken by one person. The intra-oral panoramic arch camera can save clinical time and improve accuracy for treatment planning. The intra-oral panoramic arch camera includes a plurality of image capturing devices and a plurality of lamps, such as light emitting diodes, for providing sufficient lighting for capturing the image. The intra-oral panoramic arch camera can include adjustable positioning arms to adjust the individual cameras to the correct positioning depending on the patient's oral structure.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Inventor: Jessica Stephanie Andrews
  • Patent number: 8712228
    Abstract: An intraoral camera comprising: an imaging section for obtaining image data from a patient in a dental chair; a transmitter comprising a transmitter configured for both wired and wireless transmission of the obtained image data to a computer; and a power section including a cable that obtains power from the dental chair or a battery module within the camera.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: April 29, 2014
    Assignee: Carestream Health, Inc.
    Inventors: Jean-Marc Inglese, Edward R. Shellard
  • Patent number: 8698882
    Abstract: A sample and hold circuit includes a plurality of capacitors, a network of switches and a control circuit. The control circuit is operable to control the network of switches so as to sample an incoming signal onto at least some of the plurality of capacitors. In such an operation, each capacitor takes a sample of the incoming signal at a different time. The sample and hold circuit outputs a signal corresponding to an average of the samples.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: April 15, 2014
    Assignee: STMicroelectronics (Research & Development) Limited
    Inventor: John Kevin Moore
  • Patent number: 8687859
    Abstract: A method for identifying tooth regions. The method includes generating a first threshold image from a first tooth image by selecting intensity data values higher than a first predetermined threshold value c1; generating a second threshold image from a second tooth image by selecting intensity data values higher than a second predetermined threshold value c2; generating a preliminary tooth regions image that defines at least a first tooth region from the intersection of the first and second threshold images; generating a reference binary image from the first image by selecting intensity data values higher than a third predetermined threshold value c3, wherein threshold value c3 exceeds c1; and generating a refined tooth regions image from at least the first tooth region in the preliminary tooth regions image. The first tooth region is connected to objects in the reference binary image.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: April 1, 2014
    Assignee: Carestream Health, Inc.
    Inventors: Jiayong Yan, Wei Wang, Liangliang Pan, Victor C. Wong
  • Publication number: 20140002626
    Abstract: An autofocus method for an intra-oral camera modulates the focus of a liquid lens in a cycle that has at least first, second, and third focus positions and obtains an image at each focus position, measuring focus of the obtained image. The position of the liquid lens is adjusted according to the measured focus. Steps of modulating the focus of the liquid lens in the cycle with at least first, second, and third focus positions, and obtaining the image at each focus position and measuring focus of the obtained image are repeated.
    Type: Application
    Filed: March 14, 2012
    Publication date: January 2, 2014
    Inventors: Zaiguang Yu, Guijian Wang, Zhaohua Liu
  • Publication number: 20130307923
    Abstract: An extra-oral dental imaging apparatus for obtaining an image from a patient has a radiation source and a digital imaging sensor that provides, for each of a number of image pixels, at least a first digital value according to a count of received photons that exceed at least a first energy threshold. A mount supports the radiation source and the digital imaging sensor on opposite sides of the patient's head. There can be a computer in signal communication with the digital imaging sensor for acquiring one or more two-dimensional images.
    Type: Application
    Filed: December 21, 2011
    Publication date: November 21, 2013
    Inventors: Jean Marc Inglese, Sylvie M. Bothorel, Donna K. Rankin-Parobek
  • Publication number: 20130286174
    Abstract: A system configured provided with a continuously captured image sequence forming means for continuously capturing side surfaces of rows of teeth to form an image sequence, a side surface tooth row image forming means for combining sequences of images which were formed by the continuously captured image sequence forming means as partial tooth row images from an image forming the center of the overall composite so as to form a plurality of partial tooth row images, and a side surface tooth row image combining means for linking and combining a plurality of partial tooth row images which were formed by the side surface tooth row image forming means based on images farming the centers of the overall composite so as to form overall rows of teeth.
    Type: Application
    Filed: January 11, 2012
    Publication date: October 31, 2013
    Inventor: Nobuchika Urakabe
  • Patent number: 8571397
    Abstract: The present invention related to an auto focus intraoral camera. The auto focus intraoral camera includes an illumination module for providing illuminating light, an imager, and a lens system for collecting light reflected from an object and focusing the light onto the imager, wherein said lens system further comprises at least one liquid lens including a vessel filled with a first liquid, and a second liquid being in contact with said first liquid, the first and second liquids being immiscible, of different optical indexes, and of substantially same density; wherein the lens system further includes a driver integrated circuit applying variable voltage to control the focal length of said lens. According to the present application, a compact auto focus intraoral camera with a small size and simple structure is provided, which decreases the camera complexity and improve the performance.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: October 29, 2013
    Assignee: Carestream Health, Inc.
    Inventors: Zhaohua Liu, Tan Wang, Jiwu Zhang
  • Patent number: 8514268
    Abstract: A method and device for high-resolution three-dimensional (3-D) imaging which obtains camera pose using defocusing is disclosed. The device comprises a lens obstructed by a mask having two sets of apertures. The first set of apertures produces a plurality of defocused images of the object, which are used to obtain camera pose. The second set of optical filters produces a plurality of defocused images of a projected pattern of markers on the object. The images produced by the second set of apertures are differentiable from the images used to determine pose, and are used to construct a detailed 3-D image of the object. Using the known change in camera pose between captured images, the 3-D images produced can be overlaid to produce a high-resolution 3-D image of the object.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: August 20, 2013
    Assignee: California Institute of Technology
    Inventors: Morteza Gharib, Jian Lu, Scott Hsieh, Francisco Pereira, Alexei Harvard
  • Patent number: 8447087
    Abstract: An apparatus for imaging a tooth has at least one illumination source for providing an incident light having a first spectral range for obtaining a reflectance image of the tooth and a second spectral range for exciting a fluorescence image of the tooth. A first polarizer having a first polarization axis and a compensator in the path of the incident light of the first spectral range are disposed to direct light toward the tooth. A second polarizer is disposed to direct light obtained from the tooth toward a sensor and has a second polarization axis that is orthogonal to the first polarization axis. A lens is positioned in the return path to direct image-bearing light from the tooth toward the sensor for obtaining image data. A filter in the path of the image-bearing light from the tooth is treated to attenuate light in the second spectral range.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: May 21, 2013
    Assignee: Carestream Health, Inc.
    Inventors: Victor C. Wong, Robert Cuffney
  • Patent number: 8427534
    Abstract: A processor for an electronic endoscope, which is configured to be connected with a videoscope adapted to generate a picture signal for an image of an observed object through color adjustment using color adjustment data and to transmit the generated picture signal to the processor, the processor includes a light source configured to emit light for illuminating the observed object, a determining unit configured to determine whether the color adjustment data used by the videoscope is adapted to the light source, a color conversion data acquiring unit configured to acquire color conversion data adapted to the color adjustment data when the determining unit determines that the color adjustment data is not adapted to the light source, and a color converter configured to perform color conversion for the picture signal transmitted by the videoscope using the color conversion data acquired by the color conversion data acquiring unit.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: April 23, 2013
    Assignee: Hoya Corporation
    Inventor: Yosuke Tashiro
  • Publication number: 20130083181
    Abstract: A method for obtaining an image of tooth tissue directs incident light toward a tooth, wherein the incident light excites a fluorescent emission from the tooth tissue. Fluorescence image data is obtained from the fluorescent emission. Back-scattered reflectance image data is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image of the tooth tissue for caries detection.
    Type: Application
    Filed: November 27, 2012
    Publication date: April 4, 2013
    Inventors: Victor C. Wong, Rongguang Liang, Donna K. Rankin-Parobek
  • Publication number: 20130038710
    Abstract: A method for identification of caries, executed at least in part on data processing hardware, captures a plurality of blocks of digital tooth images, each block of tooth images comprising a fluorescence image and one or more reflectance images. At least one registered fluorescence image is generated from the fluorescence image and the one or more reflectance images. A combined image is generated using each of the one or more reflectance images and the at least one registered fluorescence image.
    Type: Application
    Filed: August 9, 2011
    Publication date: February 14, 2013
    Inventors: Jean-Marc Inglese, Wei Wang, Liwei Song, Victor C. Wong
  • Publication number: 20120236135
    Abstract: Methods and apparatus for registration of digital images of a plurality of dental surfaces of a patient. Multiple dental surfaces are separately scanned and digitized, where each of the surfaces has at least one marked area. All marked areas are optically acquired, creating digitized images of the plurality of dental surfaces, which are then registered in a common reference frame on the basis of a specified marked areas. In some cases, a first dental surface is disposed on an upper dental arch and a second dental surface is disposed on a lower dental arch. Marked contact areas may be indicative of local occlusion pressure.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 20, 2012
    Applicant: OPTIMET, OPTICAL METROLOGY LTD.
    Inventors: Yitzhak Daniel, Karol Sanilevici, Michael Doherty, Alex Entelis
  • Publication number: 20120200686
    Abstract: An auto focus intraoral camera with liquid lens includes: a digital imaging sensor (304) for capturing a digital image of an object; a light source for illuminating the object; an imaging lens assembly (302) for directing the light from the object along an optical path toward the digital imaging sensor; a liquid lens (100) disposed in the optical path between the imaging lens assembly and the digital imaging sensor, where the liquid lens has an adjustable focal length; a driver (306) for applying a variable voltage to the liquid lens to control the focal length of the liquid lens; and a processor (308) for processing the digital image captured by the digital imaging sensor. Meanwhile, a continuously auto focusing method for an intraoral camera is disclosed.
    Type: Application
    Filed: October 30, 2009
    Publication date: August 9, 2012
    Inventors: Zaiguang Yu, Zhaohua Liu, Tan Wang, Mantao Xu, jiwu Zhang
  • Patent number: 8200073
    Abstract: A dental treatment observation system includes a photographing unit supported with a first auxiliary arm at a front end of a support arm extending from a stand and a stereoscopic display unit supported with a second auxiliary arm at the front end of the support arm. The stand allows the photographing unit and stereoscopic display unit together to be widely moved and the first and second auxiliary arms allow the units to be separately moved in optional directions. The system is appropriate for dental treatment and is capable of reducing fatigue of a dentist during treatment.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: June 12, 2012
    Assignee: Mitaka Kohki Co., Ltd.
    Inventor: Katsushige Nakamura
  • Patent number: 8184147
    Abstract: Apparatus and methods for full-mouth intraoral image acquisition. An intraoral sensor configuration includes a multi-aperture digital camera and/or a conformal layered sensor structure, a bite piece, and an electronic cable for imaging inside surfaces of a mouth of a patient without having to re-position the digital camera and/or the conformal layered sensor structure within the mouth of the patient during an image acquisition session. Images may be acquired sequentially or simultaneously.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: May 22, 2012
    Inventors: Kevin Crucs, Angela Daetwyler
  • Publication number: 20120113240
    Abstract: Apparatus and methods for full-mouth intraoral image acquisition. An intraoral sensor configuration includes a multi-aperture digital camera and/or a conformal layered sensor structure, a bite piece, and an electronic cable for imaging inside surfaces of a mouth of a patient without having to re-position the digital camera and/or the conformal layered sensor structure within the mouth of the patient during an image acquisition session. Images may be acquired sequentially or simultaneously.
    Type: Application
    Filed: January 3, 2012
    Publication date: May 10, 2012
    Inventor: Kevin M. CRUCS
  • Publication number: 20120062716
    Abstract: Described are methods that enable rapid automated object classification of measured three-dimensional object scenes. Each method can be performed during a three-dimensional measurement procedure while data are being acquired or after completion of the measurement procedure using the acquired data. In various embodiments, an object scene is illuminated with an optical beam and an image is acquired. In some embodiments, the object scene is illuminated with a structured light pattern and a sequence of images of the object scene illuminated by the pattern at different spatial phases is acquired. Coordinates are determined for points in the one or more images and a translucence value is determined for each of the points. An object class is determined for each point based on the translucence value for the point. Optionally, additional information, such as grayscale or color image data for each point, is used to supplement the object class determination.
    Type: Application
    Filed: August 25, 2011
    Publication date: March 15, 2012
    Applicant: DIMENSIONAL PHOTONICS INTERNATIONAL, INC.
    Inventors: Robert F. Dillon, Bing Zhao
  • Publication number: 20120056993
    Abstract: A dentist's field visualization system for acquiring, processing and displaying images and full-motion video from an intraoral camera on a heads-up display.
    Type: Application
    Filed: September 8, 2010
    Publication date: March 8, 2012
    Inventors: Salman Luqman, Shahin Kharrazi, Mirza M. Luqman
  • Publication number: 20120026307
    Abstract: A system and method for real-time measurement of curing energy delivered to a simulated dental restoration from a source of curing energy. The system comprises a detector and a display. The detector measures at a location within the simulated dental restoration the amount of curing energy delivered by the curing energy source. The display displays the measured amount of curing energy in real-time. The system also comprises a temperature detector to measure temperature changes in the oral tissues during curing (teeth and gums). The system also comprises a video camera to record the operator's curing technique.
    Type: Application
    Filed: April 8, 2010
    Publication date: February 2, 2012
    Applicant: Dalhouse University
    Inventor: Richard Bengt Price
  • Publication number: 20120014571
    Abstract: A method and apparatus for generating a color mapping for a dental object. The method includes generating a transformation matrix according to a set of spectral reflectance data for a statistically valid sampling of teeth. Illumination is directed toward the dental object over at least a first, a second, and a third wavelength band, one wavelength band at a time. For each of a plurality of pixels in an imaging array, an image data value is obtained, corresponding to each of the at least first, second, and third wavelength bands. The transformation matrix is applied to form the color mapping by generating a set of visual color values for each of the plurality of pixels according to the obtained image data values and according to image data values obtained from a reference object at the at least first, second, and third wavelength bands. The color mapping can be stored in an electronic memory.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 19, 2012
    Inventors: Victor C. Wong, James R. Milch, Lawrence A. Ray, Peter D. Burns
  • Publication number: 20120013722
    Abstract: An apparatus for imaging a tooth has at least one illumination source for providing an incident light having a first spectral range for obtaining a reflectance image of the tooth and a second spectral range for exciting a fluorescence image of the tooth. A first polarizer having a first polarization axis and a compensator in the path of the incident light of the first spectral range are disposed to direct light toward the tooth. A second polarizer is disposed to direct light obtained from the tooth toward a sensor and has a second polarization axis that is orthogonal to the first polarization axis. A lens is positioned in the return path to direct image-bearing light from the tooth toward the sensor for obtaining image data. A filter in the path of the image-bearing light from the tooth is treated to attenuate light in the second spectral range.
    Type: Application
    Filed: July 28, 2011
    Publication date: January 19, 2012
    Inventors: Victor C. Wong, Robert Cuffney
  • Publication number: 20120015329
    Abstract: Apparatus and methods are described, including at least one tool configured to be placed inside a subject's mouth. A first optically-visible marker is coupled to the tool. A second optically-visible marker is coupled to a structure inside the subject's mouth. A plurality of optical cameras are coupled to the tool, and are placed inside the subject's mouth by the tool being placed inside the subject's mouth. The cameras acquire respective images of the inside of the subject's mouth, in which the second optically-visible marker is identifiable. A plurality of optical cameras that are disposed outside the subject's mouth acquire respective images of the tool, while the tool is inside the subject's mouth, in which images the first optically-visible marker is identifiable. Other embodiments are also described.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 19, 2012
    Applicant: RAINBOW MEDICAL LTD.
    Inventors: Yossi GROSS, Hadar BETTER
  • Publication number: 20120014572
    Abstract: A method and apparatus for obtaining a color mapping of a dental object. Illumination is directed toward the object over at least first, second, and third wavelength band, one band at a time. An image of the dental object is captured at each wavelength band to form a set of images of the dental object. For pixels in the captured set of images, an image data value for the pixel corresponds to each of the wavelength bands and calculates interpolated image data values proportional to the spectral reflectance of the dental object, according to the obtained image data values and according to image data values obtained from a reference object at the wavelength bands. Spectral distribution data for a viewing illuminant is obtained and the visual color of the dental object reconstructed according to the calculated interpolated image data values and the obtained spectral distribution of the viewing illuminant.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 19, 2012
    Inventors: Victor C. Wong, James R. Milch