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    Calibration device and method for calibrating a dental camera
    183.
    发明授权
    Calibration device and method for calibrating a dental camera 有权

    公开(公告)号：US10531072B2

    公开(公告)日：2020-01-07

    申请号：US14440478

    申请日：2013-11-04

    Applicant: DENTSPLY SIRONA, Inc.

    Inventor： Bjorn Popilka ,  Frank Thiel ,  Frank Forster

    IPC: H04N13/246 ,  A61B5/107 ,  G01B11/25 ,  G01B21/04 ,  A61B5/00 ,  G06T7/80 ,  G06T7/521 ,  H04N17/00 ,  A61C9/00

    Abstract: The invention relates to a method and a calibration device for calibrating a dental camera (1), which is based on a fringe projection method for optically measuring a dental object (10) in three dimensions, comprising a projection grid (2) for generating a projection pattern (3) that consists of a plurality of fringes (5), and an optical system (4) that projects the generated projection pattern (3) onto the object (10) to be measured. In a first step, a reference surface (74) with known dimensions is measured by the dental camera (1) using the fringe projection method. Actual coordinates (33, 36) of a plurality of measurement points (11) are determined on the reference surface (74), and the determined actual coordinates (33, 36) are compared to target coordinates (34) of the measurement points (11) on the reference surface (74). In the following method step, proceeding from the deviations (35, 37) between the actual coordinates (33, 36) and the target coordinates (34), a plurality of compensation values (40, 50, 51, 52, 53) are calculated for the individual fringes (5) of the projection pattern (3).

    DENTAL MATRIX BAND
    184.
    发明申请
    DENTAL MATRIX BAND 审中-公开

    公开(公告)号：US20190388203A1

    公开(公告)日：2019-12-26

    申请号：US16560441

    申请日：2019-09-04

    Applicant: DENTSPLY SIRONA INC.

    Inventor： Simon P. McDonald

    IPC: A61C13/15

    Abstract: The present invention relates to a dental matrix for use repairing and restoring inter-proximal cavities on a tooth with light-cured composites, the dental matrix comprising a matrix body and a plurality of light transmitting micro-pores positioned on the matrix body and overlying the inter-proximal surface of the tooth when the dental matrix engages the restored tooth. The present invention further relates to a method manufacture of such dental matrix.

    Extraoral dental scanner
    185.
    发明授权
    Extraoral dental scanner 有权

    公开(公告)号：US10463458B2

    公开(公告)日：2019-11-05

    申请号：US14770301

    申请日：2014-02-27

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Rainer Jumpertz

    IPC: A61C13/34 ,  H04N13/204 ,  A61C9/00 ,  G01B11/24

    Abstract: An extraoral dental scanner for three-dimensional capture of the surface of a dental shaped part (300) with a 3D measuring camera (102) having an optical axis (106), wherein the means for the machine-controlled relative positioning of the 3D measuring camera (102) and the dental shaped part (300) are embodied in such a way that the means for taking up and positioning the dental shaped part (300) can be moved into a parking position outside a region that can be captured optically by the 3D measuring camera (102), with a work plate (708) for manually positioning the dental shaped part (300) in the measurement volume (144) of the 3D measuring camera (102), wherein the work plate (708) is aligned perpendicularly to the optical axis (106) and wherein the work plate (708), as viewed from the 3D measuring camera (102), is arranged behind the means for taking up and positioning the dental shaped part (300), makes it possible to record uninterrupted 3D image data with very short recording times both by automatic and by manual positioning of dental shaped parts of different sizes and embodiment variants.

    Method and apparatus for providing two digital panoramic layer images
    187.
    发明授权
    Method and apparatus for providing two digital panoramic layer images 有权

    公开(公告)号：US10456096B2

    公开(公告)日：2019-10-29

    申请号：US15528152

    申请日：2015-11-23

    Applicant: DENTSPLY SIRONA inc.

    Inventor： Kai Lindenberg

    IPC: A61B6/14 ,  A61B6/00

    Abstract: The invention relates to a method for providing a first and a second digital panoramic layer image optimized for a comparison, wherein the first and second panoramic layer images each have multiple projections detected and stored for them by means of at least one digital detector during an at least partial revolution of a recording unit around an object to be recorded, and the first and second panoramic layer images are each produced from the multiple projections in accordance with a computation code and by forming a panoramic layer. Differences between the first and second panoramic layer images are minimized by altering at least one parameter of the computation code for fresh production of the first and/or second panoramic layer image. In addition, the invention relates to a corresponding apparatus.

    Method to manufacture a colored blank, and blank
    188.
    发明授权
    Method to manufacture a colored blank, and blank 有权

    公开(公告)号：US10441391B2

    公开(公告)日：2019-10-15

    申请号：US15464316

    申请日：2017-03-20

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Lothar Volkl ,  Stefan Fecher ,  Martin Kutzner ,  Tanja Oefner

    IPC: A61C13/083 ,  A61C13/00 ,  A61C13/08 ,  A61K6/00 ,  A61K6/02 ,  A61K6/04 ,  C04B35/48 ,  A61C13/09

    Abstract: The invention relates to a method for manufacturing a colored blank, which contains zirconium dioxide and is intended for the manufacture of a dental restoration, whereby raw materials in powder form, at least some of which contain one coloring substance each, are mixed with, zirconium dioxide as the main ingredient, the resulting mixture is pressed and subsequently subjected to at least one thermal treatment. To generate the desired fluorescence, it is intended that in the raw materials in powder form one uses as coloring substances at least terbium, erbium, cobalt, as well as one substance that generates a fluorescence effect in the dental restoration, however not iron, aside from naturally occurring impurities.

    LIGHT CURED ADDITION SILICONE IMPRESSION MATERIAL WITH IMPROVED STORAGE STABILITY
    189.
    发明申请
    LIGHT CURED ADDITION SILICONE IMPRESSION MATERIAL WITH IMPROVED STORAGE STABILITY 审中-公开

    公开(公告)号：US20190298622A1

    公开(公告)日：2019-10-03

    申请号：US16369440

    申请日：2019-03-29

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Christos ANGELETAKIS

    IPC: A61K6/10 ,  C08L83/04

    Abstract: The present disclosure generally relates to a curable one part silicone composition. The curable one part silicone composition includes an organopolysiloxane compound having at least two unsaturated groups; an organohydrogenpolysiloxane compound having at least two Si—H groups; a catalyst for enabling the addition of the hydrogen atoms bonded to the silicone to the unsaturated group; and at least one surface treated particulate filler. The curable one part silicone composition is useful as a dental impression material. More particularly, the curable one part silicone composition including the surface treated filler extends storage stability of the dental impression material. The disclosure also provides methods of preparing such curable one part silicone composition.

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