Longitudinal analysis and visualization under limited accuracy system

A system comprising:

• a memory;
• and
• a processing device operatively coupled to the memory, the processing device to:
• make a comparison between first image data of a dental arch and second image data of the dental arch;
• determine a plurality of spatial differences between a first representation of the dental arch in the first image data and a second representation of the dental arch in the second image data;
• determine that a first spatial difference of the plurality of spatial differences is attributable to scanner inaccuracy;
• determine that a second spatial difference of the plurality of spatial differences is attributable to a clinical change to the dental arch;
• and
• generate a third representation of the dental arch that is a modified version of the second representation, wherein the first spatial difference is removed in the third representation, and wherein the third representation comprises a visual enhancement that accentuates the second spatial difference.

A non-transitory storage medium comprising instructions that, when executed by a processing device, cause the processing device to perform operations comprising:

• making a comparison between first image data of a dental arch and second image data of the dental arch, wherein the first image data was generated based on a first intraoral scan of the dental arch performed at a first time by a first intraoral scanner and the second image data was generated based on a second intraoral scan of the dental arch performed at a second time by the first intraoral scanner or a second intraoral scanner;
• determining, by a processing device, a plurality of spatial differences between a first representation of the dental arch in the first image data and a second representation of the dental arch in the second image data;
• determining, by the processing device, that a first spatial difference of the plurality of spatial differences is attributable to scanner inaccuracy of at least one of the first intraoral scanner or the second intraoral scanner;
• determining, by the processing device, that a second spatial difference of the plurality of spatial differences is attributable to a clinical change to the dental arch;
• and
• generating, by the processing device, a third representation of the dental arch that is a modified version of the second representation, wherein the first spatial difference is removed in the third representation, and wherein the third representation comprises a visual enhancement that accentuates the second spatial difference.