Dental analysis with missing teeth prediction

A method comprising:

• receiving, in a processor, a scan of a patient's teeth;
• displaying a model of the patient's teeth based on the scan;
• triggering, upon selection by a user of a control to display a metric of relative sizes of the patient's teeth, a computing system to perform the method of:
• identifying a missing tooth and an associated dental arch in the scan of the patient's teeth;
• determining that a contralateral tooth to the missing tooth is not present;
• estimating a mesiodistal width of the missing tooth, wherein the estimated mesiodistal width is based on the associated dental arch of the missing tooth and a predetermined offset added to a tooth width of a tooth next to the missing tooth that is not the contralateral tooth;
• and
• calculating a ratio of the mesiodistal widths of at least some of the patient's mandibular teeth to at least some of the patient's maxillary teeth, wherein the calculation of the mesiodistal width includes the estimated mesiodistal width of the missing tooth;
• create an orthodontic treatment plan to reposition at least one of the patient's teeth based on the calculated ratio;
• and
• display the orthodontic treatment plan.

A non-transitory computing device readable medium having instructions stored thereon that are executable by one or more processors to cause a computing system to perform the method of:

• receiving, in the one or more processors, a scan of a patient's teeth;
• identifying a missing tooth and an associated dental arch in the scan of the patient's teeth;
• determining that a contralateral tooth to the missing tooth is not present;
• estimating a mesiodistal width of the missing tooth, wherein the estimated mesiodistal width is based on the associated dental arch of the missing tooth and a predetermined offset added to a tooth width of a tooth next to the missing tooth that is not the contralateral tooth;
• calculating a ratio of the mesiodistal widths of at least some of the patient's mandibular teeth to at least some of the patient's maxillary teeth, wherein the calculation of the mesiodistal width includes the estimated mesiodistal width of the missing tooth;
• creating an orthodontic treatment plan to reposition at least one of the patient's teeth based on the calculated ratio;
• and
• outputting the orthodontic treatment plan.