Abstract: A method for orthodontic treatment includes providing a first set of aligners to a user. The first set of aligners includes a first aligner, a second aligner, and a third aligner configured to move a tooth of a user. The first aligner, the second aligner, and the third aligner are created using a single physical dental model and are substantially the same shape. The first aligner has a first thickness, the second aligner has a second thickness, and the third aligner has a third thickness. The first thickness is different than the second thickness and the third thickness, and the second thickness is at least substantially equivalent to the third thickness.

Abstract: A method for analyzing a dental impression including receiving, by a dental impression review computer system, an image of a first dental impression administered by a user of the user's teeth, analyzing, by the dental impression review computer system, the image of the first dental impression, and providing, by the dental impression review computer system, feedback to the user based on the analysis.

Abstract: A method for orthodontic treatment includes providing an aligner configured to move a tooth of a user and providing a movement stimulus associated with the aligner where the movement stimulus is configured to move the tooth of the user substantially the same amount when the aligner is worn by the user less than twenty-two hours a day according to a treatment plan specifying a total number of treatment days than the aligner alone would be able to move the tooth when worn for at least twenty-two hours a day for the total number of treatment days.

Abstract: A method for orthodontic treatment includes providing a first set of aligners to a user. The first set of aligners includes a first aligner, a second aligner, and a third aligner configured to move a tooth of a user. The first aligner, the second aligner, and the third aligner are created using a single physical dental model and are substantially the same shape. The first aligner has a first thickness, the second aligner has a second thickness, and the third aligner has a third thickness. The first thickness is different than the second thickness and the third thickness, and the second thickness is at least substantially equivalent to the third thickness.