Method and system for optimizing dental aligner geometry
First Claim
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1. A method of determining a geometry of an orthodontic appliance for moving a tooth from an initial position to a target position, comprising:
- establishing the initial position of the tooth by representing the tooth with digital data;
determining the target position of the tooth in a treatment plan comprising manipulating the digital data representing the tooth;
determining, using a computer, a sweep geometry cavity and an associated movement vector for moving the tooth from the initial position to the target position, the sweep geometry cavity being configured to accommodate the union of all positions of the tooth between the initial position and the target position without interference between the sweep geometry cavity and the union of all positions of the tooth between the initial position and the target position;
modifying the sweep geometry cavity to interface with the tooth to generate movement of the tooth along the movement vector; and
outputting, from a computer, data for generating an orthodontic appliance for moving the tooth from the initial position to the target position, the appliance having a tooth-receiving cavity geometry defined by the modified sweep geometry cavity.
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Abstract
Method and system for establishing an initial position of a tooth, determining a target position of the tooth in a treatment plan, calculating a movement vector associated with the tooth movement from the initial position to the target position, determining a plurality of components corresponding to the movement vector, and determining a corresponding one or more positions of a respective one or more attachment devices relative to a surface plane of the tooth such that the one or more attachment devices engages with a dental appliance are provided.
337 Citations
31 Claims
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1. A method of determining a geometry of an orthodontic appliance for moving a tooth from an initial position to a target position, comprising:
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establishing the initial position of the tooth by representing the tooth with digital data; determining the target position of the tooth in a treatment plan comprising manipulating the digital data representing the tooth; determining, using a computer, a sweep geometry cavity and an associated movement vector for moving the tooth from the initial position to the target position, the sweep geometry cavity being configured to accommodate the union of all positions of the tooth between the initial position and the target position without interference between the sweep geometry cavity and the union of all positions of the tooth between the initial position and the target position; modifying the sweep geometry cavity to interface with the tooth to generate movement of the tooth along the movement vector; and outputting, from a computer, data for generating an orthodontic appliance for moving the tooth from the initial position to the target position, the appliance having a tooth-receiving cavity geometry defined by the modified sweep geometry cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 28, 29, 30, 31)
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16. A method of designing a dental appliance having a specific cavity geometry for moving a tooth, comprising:
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establishing an initial position of the tooth by representing the tooth with digital data; determining a target position of the tooth in a treatment plan comprising manipulating the digital data representing the tooth; determining, using a computer, a sweep geometry cavity and a first movement vector associated with movement of the tooth from the initial position to the target position, the sweep geometry cavity being configured to accommodate the union of all positions of the tooth between the initial position and the target position without interference between the sweep geometry cavity and the union of all positions of the tooth between the initial position and the target position; determining, using a computer, a component corresponding to the first movement vector; modifying the sweep geometry cavity to interface with the tooth to generate movement of the tooth along the first movement vector; designing, using a computer, an appliance having a tooth-receiving cavity geometry defined by the modified sweep geometry cavity; and determining, using a computer, a corresponding position of one or more attachment devices relative to a surface plan of the tooth such that the one or more attachment devices is configured to engage with the dental appliance at a contact point to generate the component corresponding to the first movement vector. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification