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Strength of base materials
R M Carvalho1, R B Del'Hoyo, R S Suga
1Faculdade de Odontologia de Bauru, Brazil.
American Journal of Dentistry
|June 1, 1995
Abstract
Purpose:
To compare the punch resistance of VariGlass and Vitrebond.
Materials And Methods:
Discs measuring 1.4 cm in diameter and 1.5 mm thick of VariGlass (VG) and Vitrebond (VT) light-activated lining materials, were prepared and submitted to punch testing in a universal testing machine at 7 minutes, 30 minutes and 24 hours after mixing.
Results:
VG showed higher resistance to punch testing than the VT in the three periods evaluated (P< 0.01). The results were further compared to previous data obtained from three calcium hydroxide lining cements which gave much lower values than VG and VT (P< 0.01).