Effect of reheating on the accuracy of polysulfide impressions.
Polysulfide impressions were made at 37 degrees C in two cylindrical trays of a truncated cone-shaped chromium-steel die. One tray size was used to obtain impressions with 1 mm thickness from tray to the gingival margin of the preparation, while the second tray permitted a thickness of 4 mm. Stone dies were made from impressions after (1) cooling to 22 degrees C for 10 min or (2) cooling to 22 degrees C for 10 min and reheating to 37 degrees C for 30 min. Results revealed that reheating impressions to mouth temperature before pouring the dies improved their accuracy.
de Araujo
P A
PA
Faculdade de Odontologia de Bauru, Universidade de São Paulo.
Jorgensen
K D
KD
de Araujo
C dos R
Cdos R
D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique; D006358:Hot Temperature; D003765:Models, Dental; D013440:Sulfides / Q000737:chemistry*
D003760:Dental Impression Materials; D013440:Sulfides; C032915:polysulfide