Photopolymerized resins: surface hardness variation in relation to time of polymerization and setting.
The authors studied the superficial hardness of composite resins cured for two different times: 20 and 40 seconds of light exposure. The hardness values were read immediately and 24 hours after polymerization. A significant increase in hardness was observed with 40 s exposure as compared to 20 s. Hardness values were significantly higher at 24 h than immediately after polymerization.
Turbino
M L
ML
Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Brazil.
Vinha
D
D
Centola
A L
AL
Campos
G M
GM
D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins / Q000737:chemistry*; D006244:Hardness; D008027:Light; D008422:Materials Testing; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements; D013499:Surface Properties; D013997:Time Factors
D003188:Composite Resins; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D019279:Resin Cements; C065770:Herculite XR; C074741:Silux Plus; C036885:prisma-fil; C048711:P-30 composite resin; D017438:Bisphenol A-Glycidyl Methacrylate; C039734:Durafill; C047484:heliosit; C059919:Estilux posterior; C046503:formula F 70