公开(公告)号：US10331411B2

公开(公告)日：2019-06-25

申请号：US15532537

申请日：2015-12-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jennifer F. Schumacher ,  Glenn E. Casner ,  Yanina Shkel ,  Andrew P. Bonifas ,  Anthony J. Sabelli ,  Brian J. Stankiewicz ,  John A. Wheatley ,  Ravishankar Sivalingam ,  Robert W. Shannon

IPC: G06F7/58

Abstract: Systems and methods for generating random bits by using physical variations present in material samples are provided. Initial random bit streams are derived from measured material properties for the material samples. In some cases, secondary random bit streams are generated by applying a randomness extraction algorithm to the derived initial random bit streams.

公开(公告)号：US09737257B2

公开(公告)日：2017-08-22

申请号：US14609529

申请日：2015-01-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Evan J. Ribnick ,  Guruprasad Somasundaram ,  Brian J. Stankiewicz ,  Aya Eid ,  Ravishankar Sivalingam ,  Shannon D. Scott ,  Anthony J. Sabelli ,  Robert D. Lorentz

IPC: A61B5/00 ,  G06F19/00 ,  A61C9/00

CPC classification number: A61B5/4557 ,  A61B5/0062 ,  A61B5/0088 ,  A61B5/4547 ,  A61B5/7275 ,  A61B5/743 ,  A61B2576/02 ,  A61C9/0053 ,  G06F19/00 ,  G06F19/30 ,  G06T7/0014 ,  G06T7/11 ,  G06T2207/10028 ,  G06T2207/30036

Abstract: Methods for estimating and predicting tooth wear based upon a single 3D digital model of teeth. The 3D digital model is segmented to identify individual teeth within the model. A digital model of a tooth is selected from the segmented model, and its original shape is predicted. The digital model is compared with the predicted original shape to estimate wear areas. A mapping function based upon values relating to tooth wear can also be applied to the selected digital model to predict wear of the tooth.

公开(公告)号：US20160220173A1

公开(公告)日：2016-08-04

申请号：US14609529

申请日：2015-01-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Evan J. Ribnick ,  Guruprasad Somasundaram ,  Brian J. Stankiewicz ,  Aya Eid ,  Ravishankar Sivalingam ,  Shannon D. Scott ,  Anthony J. Sabelli ,  Robert D. Lorentz

IPC: A61B5/00 ,  A61C9/00

CPC classification number: A61B5/4557 ,  A61B5/0062 ,  A61B5/0088 ,  A61B5/4547 ,  A61B5/7275 ,  A61B5/743 ,  A61B2576/02 ,  A61C9/0053 ,  G06F19/00 ,  G06F19/30 ,  G06T7/0014 ,  G06T7/11 ,  G06T2207/10028 ,  G06T2207/30036

Abstract: Methods for estimating and predicting tooth wear based upon a single 3D digital model of teeth. The 3D digital model is segmented to identify individual teeth within the model. A digital model of a tooth is selected from the segmented model, and its original shape is predicted. The digital model is compared with the predicted original shape to estimate wear areas. A mapping function based upon values relating to tooth wear can also be applied to the selected digital model to predict wear of the tooth.

Abstract translation: 基于单个3D数字模型牙齿估计和预测牙齿磨损的方法。 3D数字模型被分割以识别模型内的单个牙齿。 从分段模型中选择牙齿的数字模型，并预测其原始形状。 将数字模型与预测的原始形状进行比较，以估计磨损面积。 基于与牙齿磨损相关的值的映射函数也可以应用于所选择的数字模型以预测牙齿的磨损。

公开(公告)号：US20160004811A1

公开(公告)日：2016-01-07

申请号：US14321318

申请日：2014-07-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Guruprasad Somasundaram ,  Evan J. Ribnick ,  Ravishankar Sivalingam ,  Aya Eid ,  Theresa M. Meyer ,  Golshan Golnari ,  Anthony J. Sabelli

IPC: G06F19/12 ,  G06F17/10

CPC classification number: G06T7/0016 ,  A61B5/0088 ,  A61B5/4547 ,  A61C7/002 ,  A61C9/0053 ,  A61C19/04 ,  G06F17/50 ,  G06T7/11 ,  G06T13/20 ,  G06T15/08 ,  G06T19/20 ,  G06T2200/04 ,  G06T2207/30036 ,  G06T2210/41

Abstract: A method for detecting tooth wear using digital 3D models of teeth taken at different times. The digital 3D models of teeth are segmented to identify individual teeth within the digital 3D model. The segmentation includes performing a first segmentation method that over segments at least some of the teeth within the model and a second segmentation method that classifies points within the model as being either on an interior of a tooth or on a boundary between teeth. The results of the first and second segmentation methods are combined to generate segmented digital 3D models. The segmented digital 3D models of teeth are compared to detect tooth wear by determining differences between the segmented models, where the differences relate to the same tooth to detect wear on the tooth over time.

Abstract translation: 使用在不同时间采用的数字3D模型来检测牙齿磨损的方法。 牙齿的数字3D模型被分割以识别数字3D模型内的各个牙齿。 所述分割包括执行第一分割方法，所述第一分割方法在所述模型中的至少一些所述牙齿上段划分，以及第二分割方法，其将所述模型内的点分类为在牙齿的内部或在牙齿之间的边界上。 第一和第二分割方法的结果被组合以产生分段的数字3D模型。 比较分割数字3D模型的牙齿，通过确定分段模型之间的差异来检测牙齿磨损，其中差异与相同的牙齿相关，以检测牙齿上的磨损随时间的变化。