Strength of base materials.
OBJECTIVE
To compare the punch resistance of VariGlass and Vitrebond.


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).
Carvalho
R M
RM
Faculdade de Odontologia de Bauru, Brazil.
Del'Hoyo
R B
RB
Suga
R S
RS
D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D002126:Calcium Hydroxide / Q000737:chemistry; D003723:Dental Amalgam; D003736:Dental Cavity Lining; D003764:Dental Materials / Q000737:chemistry; D003799:Dental Stress Analysis; D004548:Elasticity; D005899:Glass Ionomer Cements / Q000737:chemistry; D008422:Materials Testing; D008903:Minerals / Q000737:chemistry; D013718:Tensile Strength; D013997:Time Factors
D000180:Acrylic Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; D008903:Minerals; C081982:VariGlass VLC; C067790:Vitrabond; C025702:Dycal; D003723:Dental Amalgam; C040408:Life (dental material); D002126:Calcium Hydroxide