Systems and methods for library-based tooth selection in digital dental appliance design

A method for selecting a candidate tooth library for auto-designing a dental appliance for a patient, the method comprising:

• receiving, by a computer system, patient tooth data, wherein the patient tooth data comprises a scan of a patient's teeth;
• identifying, by the computer system, one or more markers on the teeth in the patient tooth data, wherein the markers include at least opposing edges on a tooth;
• determining, by the computer system, teeth measurements based on the identified markers, wherein determining the teeth measurements comprises determining a width between the opposing edges on the tooth;
• selecting, by the computer system and from a static tooth library data store, a subset of tooth libraries based on the teeth measurements, wherein selecting the subset of tooth libraries based on the teeth measurements comprises:
• identifying at least one tooth library having respective tooth width measurements within a threshold range of the determined width of the tooth in the patient tooth data, and
• adding the identified at least one tooth library to the subset of tooth libraries;
• selecting, by the computer system, a candidate tooth library from the subset of the tooth libraries based on the candidate tooth library satisfying one or more dental-appliance-fit criteria;
• and
• returning, by the computer system, the candidate tooth library for the patient.