System and method for automatic construction of tooth axes
AssigneeAlign Technology, Inc.
InventorsIan Kitching, Roman Roschin, Fuming Wu, Vadim Matov, Alexey Vishnevskiy
Life of this patent
Estimating the term…
Abstract
System and method for automatic construction of the tooth's axes in terms of three orthogonal unit vectors are disclosed. Three dimensional data for a tooth is used to automatically construct the tooth's axes. System and methods for automatic construction of the axes for different types of teeth such as incisors, canines, premolars, and molars are disclosed.
Claims24
A computer-implemented method for automatic construction of a set of axes for a tooth having a ridge, comprising:
- receiving three dimensional data for the tooth;
- automatically calculating an OZ axis for the tooth, such that the OZ axis approximates an axis of rotation symmetry for the tooth;
- and
- automatically calculating an OY axis for the tooth, such that the OY axis is substantially parallel to the ridge of the tooth.
(canceled)
A computer-implemented method for automatic construction of a set of axes for a tooth having a ridge and a cusp, comprising:
- receiving three dimensional data for the tooth;
- automatically calculating an OZ axis for the tooth, such that the OZ axis approximates an axis of rotation symmetry for the tooth;
- and
- automatically calculating an OY axis for the tooth, such that the OY axis is substantially parallel to the ridge of the tooth.
(canceled)
A computer-implemented method for automatic construction of a set of axes for a tooth having a pair of cusps and a crown, comprising:
- receiving three dimensional data for the tooth;
- automatically calculating an OZ axis for the tooth, such that the OZ axis approximates an axis of rotation symmetry for the tooth;
- and
- automatically calculating an OX axis for the set of axes, such that the OX axis is substantially parallel to a line that connects the pair of cusps.
A computer-implemented method for automatic construction of a set of axes for a tooth having four cusps and a crown, comprising:
- receiving three dimensional data for the tooth;
- automatically calculating an OZ axis for the tooth, such that the OZ axis passes approximates an axis of rotation symmetry for the tooth;
- and
- automatically calculating an OX axis for the set of axes, such that the OX axis is substantially parallel to a line that bisects the cusps.
(canceled)
(canceled)
A computerized system for automatic construction of a set of axes for a tooth having a ridge and a cusp, the computerized system comprising:
- a microprocessor comprising a plurality of algorithms;
- a memory device;
- and
- wherein the computerized system is configured for:
- receiving three dimensional data for the tooth;
- calculating a first plane that approximates a labial area of the tooth;calculating a second plane that approximates a lingual area of the tooth;
- calculating a YZ plane, for the set of axes, that is approximately balanced between the first plane for the labial area of the tooth and the second plane for the lingual area of the tooth;
- calculating an OZ axis for the set of axes, such that the OZ axis approximates an axis of rotation symmetry for the tooth;
- calculating an OY axis for the set of axes, such that the OY axis is substantially parallel to the ridge of the tooth;
- calculating a Y coordinate for an origin for the set of axes, such that the Y coordinate approximates the cusp of the tooth;
- and
- calculating an X coordinate and a Z coordinate for the origin, such that the X and Z coordinates are located proximate to a front edge of the tooth.
24-25. (canceled)
Dependencies are inferred from the claim text.