Abstract:
A color or shade assessment system and a method of assessing color or shade of an object. The system may include a color or shade measurement device having a probe portion terminating at a distal end, a light emitter assembly, and a light receiver assembly. Furthermore, a spacer including a sleeve extending from a proximal end to a distal end and defining a passageway may be coupled to the probe portion. The spacer may be alterable between (1) a first state in which the spacer is detached from the probe portion; and (2) a second state in which at least a portion of the probe portion extends into the central passageway of the sleeve and the distal end of the probe portion is located between the proximal and distal ends of the sleeve.
Abstract:
A support system for the manufacture of dental restorations is provided that includes a measurement device for determining the tooth data, such as the tooth color and color coordinates, and a data processing device including a camera for capturing a tooth image. The data processing device includes a reception module and the measurement device has a transmission module, for direct transmission of measured tooth data from the measurement device to the data processing device. The support system further includes an allocation module integrated into the data processing device for allocating the received tooth data to the tooth image, and a transmission module integrated into the data processing device for transmission of the tooth image inclusive of allocated tooth data to a data processing device of a dental laboratory.
Abstract:
Disclosed in a method, a user interface and a system for use in determining shade of a patient's tooth, wherein a digital 3D representation including shape data and texture data for the tooth is obtained. A tooth shade value for at least one point on the tooth is determined based on the texture data of the corresponding point of the digital 3D representation and on known texture values of one or more reference tooth shade values.
Abstract:
Disclosed are a scanner system and a method for recording surface geometry and surface color of an object where both surface geometry information and surface color information for a block of said image sensor pixels at least partly from one 2D image recorded by said color image sensor.
Abstract:
A method for color texture imaging of teeth with a monochrome sensor array obtains a 3-D mesh representing a surface contour image according to image data from views of the teeth. For each view, recording image data generates sets of at least three monochromatic shading images. Each set of the monochromatic shading images is combined to generate 2-D color shading images, corresponding to one of the views. Each polygonal surface in the mesh is assigned to one of a subset of the views. Polygonal surfaces assigned to the same view are grouped into a texture fragment. Image coordinates for the 3-D mesh surfaces in each texture fragment are determined from projection of vertices onto the view associated with the texture fragment. The 3-D mesh is rendered with texture values in the 2-D color shading images corresponding to each texture fragment to generate a color texture surface contour image.
Abstract:
An embodiment of the invention is a method for automatic calibration of dental furnaces, there is made available a dental furnace comprising a control unit adapted to control the dental furnace for performing a firing process defined by firing process parameters such as e.g. the temperature and/or a temporal temperature curve and/or a temperature gradient and/or a vacuum in a firing chamber of the dental furnace. There is provided at least one calibration firing-object sample made of a dental material, where said dental material, after said calibration firing-object sample has been subjected to a calibration firing-object process with predetermined firing process parameters, has a defined desired color stored e.g. in the control unit. Further, a color measuring device is used which, for transmission of measurement signals and/or measurement results, is operatively connected to the control unit.
Abstract:
Gingiva indexing devices and methods with various defined red colour regions have a colour grey card or grey card assigned to it for detecting the gingiva status, in particular for producing a gingival restoration. The devices and method comprise an analysis of at least one region of the gingiva status with regard to its shades of red, the position of the shades of red, the colour profile of the shades of red, their geometry and/or their morphology. The analysis can take place manually and/or digitally, and gingiva information is obtained, in particular in the form of a gingiva map, and optional production of a virtual or real model of a gingival restoration as a reproduction of the missing part of the gums and/or part of gingiva.
Abstract:
Disclosed are a scanner system and a method for recording surface geometry and surface color of an object where both surface geometry information and surface color information for a block of said image sensor pixels at least partly from one 2D image recorded by said color image sensor
Abstract:
A miniaturized spectrometer/spectrophotometer system and methods are disclosed. A probe tip including one or more light sources and a plurality of light receivers is provided. A first spectrometer system receives light from a first set of the plurality of light receivers. A second spectrometer system receives light from a second set of the plurality of light receivers. A processor, wherein the processor receives data generated by the first spectrometer system and the second spectrometer system, wherein an optical measurement of a sample under test is produced based on the data generated by the first and second spectrometer systems.
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.