Patent attributes
A method and a system for determining a cut line of an aligner are provided. The method comprises: obtaining 3D model data of a plurality of teeth and a gingiva of a subject; obtaining, using the 3D model data, for each one of the plurality of teeth, a respective one of a plurality of individual intersection loops; segmenting, based on a predetermined rule, each one of the plurality of individual intersection loops into at least a buccal portion and a lingual portion; sequentially joining respective buccal portions and respective lingual portions associated with each one of the plurality of individual intersection loops, thereby generating a single arch form loop; smoothing the single arch form loop, thereby generating a smoothed single arch form loop; and applying the smoothed single arch form loop to an unfinished aligner to indicate the cut line on the unfinished aligner for producing the aligner.
