Table 1.

Characteristics of the composite

Material/Type	Description and composition	Lot No.	Manufacturer
Filtek LS P90 Silorane-based microhybrid composite	Silorane resin (siloxane + oxirane) 23%wt; monomer: Bis-3,4-epoxycyclohexylethylphenyl-methylsilane, 3,4- epoxycyclohexylethylcyclopolymethylsiloxane,di-and epoxy functional oligosiloxane, and trifluoride ITRE;	N468933	3M, ESPE, St. Paul, MN, USA
	Filler (76%wt): silanized quartz yttrium fluoride;
	Initiating system (camphorquinone, iodonium salt and electron donors) 0.9% and stabilizer 0.13%, and pigments, 0.005%. 0.4-1.7µm