Diametral tensile strength of composite resins submitted to different activation techniques.
The aim of this study was to evaluate the diametral tensile strength (DTS) of composite resins submitted to different curing techniques. Four composite resins were tested in this study: Targis (Ivoclar), Solidex (Shofu), Charisma (Heraeus-Kulzer) and Filtek Z250 (3M Espe). Sixty-four cylindrical specimens were prepared and divided into eight groups according to each polymerization technique (n = 8). The indirect composite resins (Targis and Solidex) were polymerized with their respective curing systems (Targis Power and EDG-lux); Charisma and Filtek Z250 were light-cured with conventional polymerization (halogen light) and additionally, with post-curing systems. Specimens were stored in artificial saliva at 37 degrees C for one week. DTS tests were performed in a Universal Testing Machine (0.5 mm/min). The data were statistically analyzed by ANOVA and Duncan tests. The results were (MPa): Z250/EDG-lux: 69.04 feminine; Z250/Targis Power: 68.57 feminine; Z250/conventional polymerization: 60.75b; Charisma/Targis Power: 52.34c; Charisma/conventional polymerization: 49.17c; Charisma/EDG-lux: 47.98c; Solidex: 36.62d; Targis: 32.86d. The results reveal that the post-cured Z250 composite resin showed the highest DTS means. Charisma composite presented no significant differences when activation techniques were compared. Direct composite resins presented higher DTS values than indirect resins.
Casselli
Denise Sá Maia
DS
Department of Restorative Dentistry, School of Dentristry of Piracicaba, State University of Campinas.
Worschech
Claudia Cia
CC
Paulillo
Luis Alexandre Maffei Sartini
LA
Dias
Carlos Tadeu Dos Santos
CT
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry* / Q000592:standards; D003793:Dental Restoration, Permanent / Q000379:methods*; D008027:Light; D008422:Materials Testing; D013718:Tensile Strength
D003188:Composite Resins