Interproximal reduction planning

A method for interproximal reduction (IPR) planning for a patient's dentition, the method comprising:

• identifying an overlap between a first tooth and a second tooth of a number of teeth in in the patient's dentition a target position of a treatment plan;
• calculating a target position angle between a first reference line along a mesial-distal local axis of the first tooth and a second reference line along a mesial-distal local axis of the second tooth when the first and second tooth are at the target position;
• calculating a determined position angle between the first reference line and the second reference line when the first and second tooth are at a determined position of the treatment plan;
• determining that the first and second tooth are sufficiently aligned for performing an IPR by establishing that the determined position angle is greater than the determined position angle;
• and
• in response to the determined position angle being greater than the determined position angle:
• revising the treatment plan to remove the overlap and align the first and second tooth in an intermediate position within the treatment plan,
• prescribing IPR on at least one of the first and second tooth in the intermediate position, and
• reclining the first and second tooth to a revised target position in a revised treatment plan.

A method for interproximal reduction (IPR) planning for a patient's dentition, the method comprising:

• identifying an overlap between a first tooth and a second tooth of a number of teeth in in the patient's dentition a determined position of a treatment plan;
• calculating an angle between a first reference line along a mesial-distal local axis of the first tooth and a second reference line along a mesial-distal local axis of the second tooth;
• determining that the first and second tooth are sufficiently aligned for performing an IPR by establishing that the angle is within a specified threshold;
• and
• in response to the angle being within the specified threshold:
• revising the treatment plan to remove the overlap and align the first and second tooth in an intermediate position within the treatment plan,
• prescribing IPR on at least one of the first and second tooth in the intermediate position, and
• reclining the first and second tooth to a revised target position in a revised treatment plan.

A system for interproximal reduction (IPR) planning, comprising:

• a processor;
• and
• a memory coupled to the processor and configured to direct the processor to:
• identifying an overlap between a first tooth and a second tooth of a number of teeth in in the patient's dentition a target position of a treatment plan;
• calculating a target position angle between a first reference line along a mesial-distal local axis of the first tooth and a second reference line along a mesial-distal local axis of the second tooth when the first and second tooth are at the target position;
• calculating a determined position angle between the first reference line and the second reference line when the first and second tooth are at a determined position of the treatment plan;
• determining that the first and second tooth are sufficiently aligned for performing an IPR by establishing that the determined position angle is greater than the determined position angle;
• and
• in response to the determined position angle being greater than the determined position angle:
• revising the treatment plan to remove the overlap and align the first and second tooth in an intermediate position within the treatment plan,
• prescribing IPR on at least one of the first and second tooth in the intermediate position, and
• reclining the first and second tooth to a revised target position in a revised treatment plan.