Table 1.

Restorative materials used

Restorative material	Composition	Manufacturer
Dispersalloy	High-copper amalgam	Dentsply Int. Ltd.Maillefer, USA
Adper scotchbond Multi-Purpose plus Adhesive system	Activator which is an ethanol-based solution of a sulfinic acid salt and a photoinitiator component Primer is an aqueous solution of HEMA and a polyalkenoic acid copolymer Adhesive is a BIS-GMA and HEMA resin combined with a novel initiation system Catalyst is comprised of the same BIS-GMA and HEMA resin system but incorporates the peroxide component of a self-cure resin system	3M ESPE, ST Paul, USA
Filtec P60	Posterior composite	3M ESPE, STPaul, USA