Systems and methods for planning an orthodontic treatment

A system for determining an orthodontic treatment based on generating a 3D representation of a given tooth of a subject, the given tooth including a crown portion and a root portion, the system comprising a processor configured to execute a method, the method comprising:

• acquiring a 3D representation of the crown portion of the given tooth,
• the 3D representation of the crown portion being associated with a predetermined longitudinal tooth axis;
• generating a 3D representation of the root portion of the given tooth by executing the steps of:
• determining a location of a root apex of the 3D representation of the root portion relative to the predetermined longitudinal tooth axis, the determining being based on a predetermined instruction for locating the root apex;
• generating, in a reference plane dissecting the tooth axis and based on the 3D representation of the crown portion, a closed curve on or around the 3D representation of the crown portion,
• segmenting the closed curve into a plurality of sub-curves;
• for each one of the plurality of sub-curves, based on the root apex and the predetermined longitudinal tooth axis, generating a respective segment of a plurality of segments of the 3D representation of the root portion, the plurality of segments of the 3D representation of the root portion comprising a totality thereof;
• merging the 3D representation of the crown portion with the 3D representation of the root portion, thereby generating the 3D representation of the given tooth;
• and
• determining, based on the 3D representation of the given tooth, the orthodontic treatment for the subject.