Efficient intraoral photogrammetry using self-identifying projective invariant marker.

Purpose: The re-measurement of full-arch implant digital impressions is an important step in denture restoration. This paper provides an efficient oral photogrammetry technology using projective invariant marker, applied in the re-measurement of full-arch implant digital impressions.

Methods: We have developed a self-recognizing marker with projection invariance, along with its detection code.