U

configurations of, 751f

for dislodging posts, 934

endodontic units, 157f

EndoRez environmental scanning electron microscope (ESM), 264f

for obstruction removal, 929–930, 930f

for paste removal, 920

piezoelectric, 238f–239f

for post removal, 229, 903–904, 909

temperature changes induced by, 752

tip design, 751–752, 752f

tissue damage from, 911f

units and tips, 156–157, 157f