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    METHOD OF MANUFACTURING A DENTAL RESTORATION
    1.
    发明申请
    METHOD OF MANUFACTURING A DENTAL RESTORATION 有权

    公开(公告)号：US20220338965A1

    公开(公告)日：2022-10-27

    申请号：US17640966

    申请日：2020-09-21

    申请人： DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

    发明人： Daniel WEISS ,  Oliver NOWARRA ,  Peter FORNOFF

    IPC分类号： A61C13/00 ,  A61C9/00

    摘要： A method of manufacturing a dental restoration including a construction step (S2) of preparing construction data for a dental tool machine for machining the dental restoration from a workpiece. The construction data defines at least the geometry of the dental restoration within the workpiece. The method includes a starting step (S3) of starting machining of the dental restoration from the workpiece in accordance with the construction data. The method also includes a preparing step (S4) of starting preparing, before termination of the construction step (S2), the dental tool machine at least through equipping it with all the consumables essential for starting the starting step (S3), and completing preparing the dental tool machine before start of the starting step (S3).

    METHOD OF METAL ARTEFACT REDUCTION IN X-RAY DENTAL VOLUME TOMOGRAPHY
    2.
    发明申请
    METHOD OF METAL ARTEFACT REDUCTION IN X-RAY DENTAL VOLUME TOMOGRAPHY 有权

    公开(公告)号：US20220207794A1

    公开(公告)日：2022-06-30

    申请号：US17604045

    申请日：2020-04-17

    申请人： DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

    发明人： Christina SARTI ,  Kai STANNIGEL ,  Michael ELVERS

    IPC分类号： G06T11/00

    摘要： The present invention relates to a method of metal artefact reduction in x-ray dental volume tomography, the method comprising: a step (S1) of obtaining two-dimensional x-ray images (1) or a sinogram (2) of at least part (v) of a patient jaw (3a), acquired through relatively rotating an x-ray source (4) and a detector (5) around the patient jaw (3a); the method being characterized by further comprising: a step (S2) of detecting metal objects (6) in the two-dimensional x-ray images (1) or the sinogram (2) by using at least a trained artificial intelligence algorithm to generate 2D masks (7) which represent the metal objects (6) in the two-dimensional x-ray images (1) or 3D masks which represent the metal objects (6) in the sinogram (2), respectively; and a step (S4; S5) of reconstructing a three dimensional tomographic image (8) respectively based on two-dimensional x-ray images (1) or the sinogram (2) and the 2D masks (7) or the 3D masks as generated.

    METHOD AND DEVICE FOR PRODUCING A PANORAMIC TOMOGRAPHIC IMAGE OF AN OBJECT TO BE RECORDED
    3.
    发明申请
    METHOD AND DEVICE FOR PRODUCING A PANORAMIC TOMOGRAPHIC IMAGE OF AN OBJECT TO BE RECORDED 有权

    公开(公告)号：US20220192616A1

    公开(公告)日：2022-06-23

    申请号：US17440358

    申请日：2020-02-25

    申请人： DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

    发明人： Stefan EICHNER ,  Markus HÜLSBUSCH

    IPC分类号： A61B6/00 ,  A61B6/03

    摘要： The invention relates to a method for producing a panoramic tomographic image (1, 11, 60) of an object (2) to be recorded using a 2D panoramic X-ray device (3), in the course of which X-rays (4) produced by means of an X-ray source (5) irradiate the object (2) and are acquired by means of an X-ray detector (7), wherein, during a movement of the X-ray source (5) and the X-ray detector (7) around the object (2), a number of 2D X-ray projection images (30) are acquired from different acquisition directions (6). A first panoramic tomographic image (1) is calculated from the acquired 2D X-ray projection images (30) using a reconstruction method, wherein the acquired 2D X-ray projection images (30) are modified using a modification method, wherein, from the modified 2D X-ray projection images (40, 50) and using the reconstruction method, a second panoramic tomographic image (11) is calculated with a higher weighting of artifacts (20) relative to anatomical structures (17, 18, 19), wherein a third panoramic tomographic image (60) with significantly reduced artifacts is calculated.

    DENTAL TURBINE
    4.
    发明申请
    DENTAL TURBINE 有权

    公开(公告)号：US20210393369A1

    公开(公告)日：2021-12-23

    申请号：US17292823

    申请日：2019-11-13

    申请人： DENTSPLY SIRONA INC. ,  SIRONA DENTAL SYSTEMS GMBH

    发明人： Siegfried GOISSER ,  Stefan GÖBEL

    IPC分类号： A61C1/05 ,  A61C1/18

    摘要： A dental turbine driven by pressurized air comprises a head housing (1) with a turbine chamber (2) and a rotor shaft (3) mounted using an anti-friction bearing (8a) with a non-rotatably mounted turbine wheel (13). The outer race (10a) of the anti-friction bearing (8a) extends into the turbine chamber (2) in axial direction. The turbine wheel (13) comprises an annular web (16a) that is arranged concentrically to the outer race (10a) of the anti-friction bearing (8a) and, together with the outer race (10a), forms a gap seal (17a). This gap seal (17a) extends in axial direction between outer race (10a) and annular web (16a) and prevents the sucking-in of liquids and dirt particles into the turbine chamber (2) during inertial rotation of the turbine wheel (13).

    DENTAL PROSTHESIS MOLDING BLOCK AND METHOD FOR PRODUCING A DENTAL PROSTHESIS PART FROM THE DENTAL PROSTHESIS MOLDING BLOCK
    5.
    发明申请
    DENTAL PROSTHESIS MOLDING BLOCK AND METHOD FOR PRODUCING A DENTAL PROSTHESIS PART FROM THE DENTAL PROSTHESIS MOLDING BLOCK 有权

    公开(公告)号：US20210000573A1

    公开(公告)日：2021-01-07

    申请号：US16767746

    申请日：2018-11-28

    申请人： SIRONA DENTAL SYSTEMS GMBH

    发明人： Sascha Schneider ,  Peter Fornoff

    IPC分类号： A61C13/00 ,  A61C8/02 ,  A61C8/00 ,  A61C13/083

    摘要： The present invention relates to a dental prosthesis molding block (10) for producing a dental prosthesis part. The block comprises an inner material (13) that is at least partially surrounded by an outer material (14), the hardness of which differs from the hardness of the inner material (13). The inner material (13) forms part of a first surface (11) of the dental prosthesis molding block (10). The invention further relates to a method for producing a dental prosthesis part. In said method, a dental prosthesis molding block (10) is provided, and the dental prosthesis part is produced by removing material from the dental prosthesis molding block (10) using a CAD/CAM process. In doing so, a pin having a self-tapping external screw thread is created.

    Method for checking tooth positions
    6.
    发明授权
    Method for checking tooth positions 有权

    公开(公告)号：US10111595B2

    公开(公告)日：2018-10-30

    申请号：US14410914

    申请日：2013-06-25

    申请人： Sirona Dental Systems GmbH

    发明人： Stefan Wundrak ,  Kai Lindenberg

    IPC分类号： A61C5/00 ,  A61B5/00 ,  A61B5/055 ,  A61B6/03 ,  A61B6/14 ,  A61C9/00 ,  A61C8/00 ,  A61B6/00 ,  A61C7/00

    摘要： The invention relates to a method for checking tooth positions, wherein an initial three-dimensional volume exposure (1) of teeth (2, 3, 4) to be checked is implemented, wherein the position and orientation of the teeth (2, 3, 4) to be checked are determined based on the initial volume exposure (1); wherein the teeth to be checked are natural teeth (2, 3, 4) comprised of tooth stumps (6, 7, 8) and tooth roots (9, 10, 11) and/or are artificial teeth comprised of artificial tooth stumps and implants; wherein the positional relationship and orientation of the tooth stumps (6, 7, 8) relative to the tooth roots (9, 10, 11) and/or to the implants are determined in particular. For checking, a first optical surface monitoring exposure (25) of the teeth (2, 3, 4) is implemented, wherein using the positional relationship thus determined the position and orientation of the tooth roots (9, 10, 11) and/or of the implants relative to one another and/or relative to a jawbone (5) are determined based on the position of the surfaces (13, 14, 15) of the tooth stumps (6, 7, 8) from the optical surface monitoring exposure (25).

    Method and reference model for checking a measuring system
    9.
    发明授权
    Method and reference model for checking a measuring system 有权
    检查系统的方法和参考模型

    公开(公告)号：US09462993B2

    公开(公告)日：2016-10-11

    申请号：US14372255

    申请日：2013-01-28

    申请人： Björn Popilka ,  Volker Wedler ,  Anders Adamson ,  Frank Thiel

    发明人： Björn Popilka ,  Volker Wedler ,  Anders Adamson ,  Frank Thiel

    IPC分类号： A61B6/00 ,  A61B5/107 ,  G06T7/00 ,  G01B21/04 ,  A61C19/04 ,  G06T19/20 ,  G09B23/28 ,  A61C9/00 ,  A61C13/34

    CPC分类号： A61B6/582 ,  A61B5/1077 ,  A61B5/1079 ,  A61B2560/0233 ,  A61C9/006 ,  A61C9/0066 ,  A61C13/34 ,  A61C19/04 ,  G01B21/042 ,  G06T7/80 ,  G06T7/85 ,  G06T19/20 ,  G06T2207/30036 ,  G06T2207/30204 ,  G06T2219/2004 ,  G09B23/283

    摘要： The invention relates to a reference object (3) and a method for checking a measuring system (1), wherein a plurality of three-dimensional recordings (4, 8) of a reference object are recorded from different recording directions (5) by means of the measuring system (1). The reference object (3) has a closed shape, wherein each of the three-dimensional recordings (4) is registered with at least the preceding recording (4). In the case of a faulty calibration and/or in the case of a faulty registration, the individual recordings (4, 8) are deformed compared to the actual shape of the reference object (3), so that the deformation continues when assembling the individual three-dimensional recordings (4) to form an overall recording (54) and the generated overall recording (54) deviates in its dimensions from the dimensions of the reference object (3) as a result thereof. At least one object region (10) of the reference object (3) is measured twice, at the beginning of a circuit and at the end of the circuit, wherein a distance (55) is determined in the overall recording (54) between a first position of the object region (10) in a first recording at the beginning of the circuit and a second position of the object region (10) in a second recording at the end of the circuit.

    摘要翻译： 本发明涉及一种用于检查测量系统（1）的参考对象（3）和方法，其中通过装置从不同的记录方向（5）记录参考对象的多个三维记录（4,8） 的测量系统（1）。 参考对象（3）具有闭合形状，其中每个三维记录（4）至少记录在前一记录（4）上。 在错误校准的情况下和/或在错误配准的情况下，与参考对象（3）的实际形状相比，各个记录（4,8）变形，使得当组装个体时变形继续 三维记录（4）形成整体记录（54），并且所产生的整体记录（54）的尺寸与其参考对象（3）的尺寸偏离。 参考对象（3）的至少一个对象区域（10）被测量两次，在电路的开始处和电路的末端，其中在整个记录（54）中确定距离（55） 物体区域（10）在电路开始处的第一记录中的第一位置和物体区域（10）在电路末端的第二记录中的第二位置。