Studies comparing different 3D intraoral scanners to traditional Intraoral scanner = Worse 3M scanner v. alginate impression. accuracy about same. chair time alginate much faster but operator did not have much experience 20 min v 7:30 min.  Pt preferred alginate 73% of time but usually because “faster” or “easier”.  Grunheid 2014 3M v VSE (arguably […]