Activation of existing attachments in orthodontic treatment

A system for secondary orthodontic treatment planning, the system comprising:

• one or more processors;
• and
• one or more memory stores coupled to one or more processors, the one or more memory stores configured to store computer instructions that, when executed by the one or more processors, perform a computer-implemented method comprising:
• receiving a scan of a subject's dentition including an existing attachment on the subject's dentition;
• determining a shape of the existing attachment based on comparing the scan to one or more prior scans of the subject's dentition;
• determining that the existing attachment is suitable for activation to achieve one or more tooth movements, at least partially based on the shape of the existing attachment;
• identify a dental appliance engagement surface of the existing attachment when the attachment is suitable for activation;
• generating a secondary treatment plan including applying a force to the subject's dentition via the identified dental appliance engagement surface;
• and
• generating a dental appliance that accommodates the existing attachment based on the secondary treatment plan.

A method for secondary orthodontic treatment planning, the method comprising:

• receiving, from a user, a request to use an existing attachment on a subject's dentition in a secondary treatment plan;
• sending, to a treatment planning system, a current scan of the subject's dentition including the existing attachment on the subject's dentition;
• receiving, from the treatment planning system, an indication that the existing attachment is determined to be suitable for activation, wherein the determination is at least partially based on one or more quality assessment criteria based on a shape of the existing attachment;
• sending, to the treatment planning system, a confirmation accepting use of the existing attachment as an active attachment in the secondary treatment plan;
• and
• receiving a dental appliance including an attachment engagement surface that is offset with respect to a dental appliance engagement surface of the existing attachment so that the dental appliance can apply the force on the subject's dentition.