Tooth movement measurement by automatic impression matching
First Claim
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1. A system for detecting deviations from an orthodontic treatment plan, the system comprising:
- at least one processor; and
a computer readable medium including instructions that when executed cause the at least one processor to;
receive a tracking model comprising a digital representation of an actual arrangement of a patient'"'"'s teeth after an orthodontic treatment plan has begun for the patient for comparison to a plan model comprising a pre-determined planned arrangement of the patient'"'"'s teeth;
perform an alignment between the plan model and the tracking model using a partial region beyond a tooth crown of the plan model and a partial region beyond a tooth crown of the tracking model such that stationary elements of each of the plan model and the tracking model are aligned with one another, the alignment including detecting the partial region of each of the tracking model and the plan model based on a polygon formed from predetermined points on at least some of the teeth in the plan model and a polygon formed from predetermined points on at least some of the teeth in the tracking model; and
detect one or more positional differences between the actual arrangement of the patient'"'"'s teeth and the pre-determined planned arrangement of the patient'"'"'s teeth.
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Abstract
The present invention relates to systems and methods for detecting deviations from an orthodontic treatment plan. One method includes receiving a tracking model, performing a matching step between individual teeth in a plan model and the tracking model, comparing the tracking model with the plan model, and detecting one or more positional differences.
193 Citations
23 Claims
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1. A system for detecting deviations from an orthodontic treatment plan, the system comprising:
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at least one processor; and a computer readable medium including instructions that when executed cause the at least one processor to; receive a tracking model comprising a digital representation of an actual arrangement of a patient'"'"'s teeth after an orthodontic treatment plan has begun for the patient for comparison to a plan model comprising a pre-determined planned arrangement of the patient'"'"'s teeth; perform an alignment between the plan model and the tracking model using a partial region beyond a tooth crown of the plan model and a partial region beyond a tooth crown of the tracking model such that stationary elements of each of the plan model and the tracking model are aligned with one another, the alignment including detecting the partial region of each of the tracking model and the plan model based on a polygon formed from predetermined points on at least some of the teeth in the plan model and a polygon formed from predetermined points on at least some of the teeth in the tracking model; and detect one or more positional differences between the actual arrangement of the patient'"'"'s teeth and the pre-determined planned arrangement of the patient'"'"'s teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for detecting deviations from an orthodontic treatment plan, the method comprising:
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receiving a tracking model comprising a digital representation of an actual arrangement of a patient'"'"'s teeth after an orthodontic treatment plan has begun for the patient for comparison to a plurality of plan models, each plan model comprising a respective pre-determined planned arrangement of the patient'"'"'s teeth; performing an alignment between each plan model and the tracking model using a partial region beyond a tooth crown of the respective plan model and a partial region beyond a tooth crown of the tracking model such that stationary elements of each of the respective plan model and the tracking model are aligned with one another, the alignment including detecting the partial region of each of the tracking model and the respective plan model based on a polygon formed from predetermined points on at least some of the teeth in the respective plan model and a polygon formed from predetermined points on at least some of the teeth in the tracking model; selecting one of the respective plan models in which the planned arrangement of the patient'"'"'s teeth best matches the actual arrangement of the patient'"'"'s teeth; and detecting one or more positional differences between the actual arrangement of the patient'"'"'s teeth and the planned arrangement of the patient'"'"'s teeth in the selected plan model. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A system for detecting deviations from an orthodontic treatment plan, the system comprising:
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at least one processor; and a computer readable medium including instructions that when executed cause the at least one processor to; receive a tracking model comprising a digital representation of an actual arrangement of a patient'"'"'s teeth after an orthodontic treatment plan has begun for the patient for comparison to a plurality of plan models, each plan model comprising a respective pre-determined planned arrangement of the patient'"'"'s teeth; perform an alignment between each plan model and the tracking model using a partial region beyond a tooth crown of the respective plan model and a partial region beyond a tooth crown of the tracking model such that stationary elements of each of the respective plan model and the tracking model are aligned with one another, the alignment including detecting the partial region of each of the tracking model and the respective plan model based on a polygon formed from predetermined points on at least some of the teeth in the respective plan model and a polygon formed from predetermined points on at least some of the teeth in the tracking model; select one of the respective plan models in which the planned arrangement of the patient'"'"'s teeth best matches the actual arrangement of the patient'"'"'s teeth; and detect one or more positional differences between the actual arrangement of the patient'"'"'s teeth and the planned arrangement of the patient'"'"'s teeth in the selected plan model. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification