Processing logic makes a comparison between first image data and second image data of a dental arch and determines a plurality of spatial differences between a first representation of the dental arch in the first image data and a second representation of the dental arch in the second image data. The processing logic determines that a first spatial difference is attributable to scanner inaccuracy and that a second spatial difference is attributable to a clinical change to the dental arch. The processing logic generates a third representation of the dental arch that is a modified version of the second representation, wherein the first spatial difference is removed in the third representation, and wherein the third representation comprises a visual enhancement that accentuates the second spatial difference.

A digital control laser automatic tooth preparation method and device and a tooth positioner are provided. The device includes an intra-oral three-dimensional scanner, a dental laser, an oral working end, an oral and maxillofacial cone beam CT scanner, a computer, a tooth positioner, a negative-pressure suction device and a real-time monitoring device. The computer is connected respectively with the intra-oral three-dimensional scanner, the dental laser, the oral working end, the oral and maxillofacial cone beam CT scanner, the negative-pressure suction device, and the real-time monitoring device. The dental laser is connected with the oral working end of the digital control laser tooth preparation control system through a light guiding arm (1). The oral working end of the digital control laser tooth preparation control system is connected with the tooth positioner and the real-time monitoring device. The negative-pressure suction device is connected with the tooth positioner.

The type and/or properties of a substance included in an object is identified highly accurately regardless of the thickness of the substance. A data processing apparatus processes counts detected at each of pixels of a photo counting detector in each of a plurality of energy ranges of X-rays. The X-rays are radiated from an X-ray tube, and transmitted through an object. The apparatus calculates an image of the object based on the counts, and sets a region of interest on the image. The apparatus further removes, from the image, pixel information showing a background present in the region of interest, and calculates, pixel by pixel, inherent information inherent to the substance, based on the counts detected at each of the respective pixels in each of the energy ranges of the X-rays in the region of interest. The inherent information indicates a transmission characteristic inherent to the X-rays.

Disclosed are an X-ray imaging apparatus capable of acquiring highly accurate three-dimensional surface data as well as a CT image of teeth and surrounding tissues thereof of a subject without increasing the dose of X-ray and the discomfort for the subject compared to conventional CT imaging, and an X-ray imaging method using the same. The X-ray imaging apparatus includes an X-ray generator; an X-ray sensor disposed to face the X-ray generator, and configured to receive X-rays transmitted through a subject to generate an electric signal, and a subject jig configured to support the subject and to move the subject to be relatively rotated about at least two axes with respect to an X-ray propagation path, wherein a CT image and high-precision three-dimensional surface data are reconstructed and provided by using a plurality of X-ray imaging data acquired through a plurality of scan sequences.

A medical X-ray photography apparatus includes the turning arm and a moving mechanism. The turning arm supports an X-ray generator and an X-ray detector. The moving mechanism includes a turning part that turns the turning arm and a moving part that moves the turning arm along a two-dimensional plane orthogonal to an axial direction of a turning shaft. The medical X-ray photography apparatus also includes a photographic region assignment receiving part that receives an operation to assign a part of a dental arch as a pseudo intraoral radiography region, a main-body control part that controls the moving mechanism based on a movement starting signal to move the turning arm to a predetermined photography starting position corresponding to the pseudo intraoral radiography region, and a signal output switch that includes a movement starting signal output part outputting the movement starting signal to the main body control part.

A calibration phantom has a surface having a reflectance calibration target with a pattern that is indicative of one or more spatial reference positions. Radio-opaque markers are disposed in the calibration phantom and are positionally correlated to the one or more spatial reference positions of the reflectance calibration target.

The invention concerns a dental imaging apparatus comprising: a support frame, a movable gantry that comprises two opposite arms respectively supporting an x-ray source and an x-ray sensor facing the x-ray source, a movable patient positioning arm connected to the support frame, two cameras positioned on the gantry arm supporting the x-ray source and on the positioning arm so as to respectively acquire side and front images of a patient's head, a display assembly configured to simultaneously display in real time a side image and a front image of the patient's head taken by the two cameras.

The invention relates to tracking pieces (110) used in the context of tracking movements of hard tissue of a jaw. According to the invention, a tracking piece (110) to be used in such context is designed to be patient-specific by including in the design of the tracking piece (110) a surface model representing a part of a person's intraoral anatomy, which surface model is generated based on imaging results acquired by imaging the anatomy.

Systems and methods are disclosed for processing and storing acquired data relating to one or more dental conditions. The methods can include acquiring a first oral feature in a first data acquisition using a data acquisition device, determining a first oral feature first reference point from the first data acquisition, diagnosing a first dental condition upon confirming that the first oral feature first reference point is associated with the first dental condition, acquiring the first oral feature in a second data acquisition using the data acquisition device, determining a first oral feature second reference point from the second data acquisition, and tracking the progression of the first dental condition by determining a discrepancy between the first oral feature first and second reference points.

The present invention relates to an augmented reality system and implementation method for a dental surgery. In the augmented reality system and implementation method for a dental surgery of the present invention, an image convergence step, an interface step and an image projection step are performed. In the image convergence step, a common image obtained by photographing the face of a patient and a transmission image corresponding to the common image are collected, and the common image is mapped to the transmission image in a 3D image in which the common image and the transmission image overlap and registered with a server.