Abstract: A control unit can receive a digital impression of an oral cavity, receive a selection of a region of interest in the digital impression, determine a size of the region of interest, determine a second reference point in the digital impression, determine a position of a selected region of interest using the first reference point, the second reference point, and the digital impression, control the x-ray detector and the x-ray source to position on opposing sides of the head such that the region of interest can be exposed with an x-ray cone beam, control one or more adjustable shutters to restrict the x-ray cone beam to expose substantially not more than the region of interest, control acquisition of at least one x-ray projection image of the region of interest, and generate an x-ray image using the x-ray projection image or images.

Abstract: Apparatuses and methods are provided for displaying the position of a dental file during endodontic treatment. Data showing the morphology of a tooth is obtained. In one embodiment, the data is X-ray image data. A three-dimensional representation of the dental file positioned in the tooth is generated, and a length that the dental file extends from an upper surface of the tooth is determined from the three-dimensional representation.

Abstract: The present invention relates to a computer implemented method of overlapping a first digital 3D image (13) and a second digital 3D image (14) each showing the oral cavity, wherein the first digital 3D image (13) is obtained through optically scanning a surface of the oral cavity, and wherein the second digital 3D image (14) is obtained through X-ray imaging, magnetic resonance imaging, or acoustical imaging of the oral cavity. The method includes a first matching step (S100) and a second matching step (S200) following the first matching step (S100).