Low-silver amalgam restorations: a two-year clinical evaluation.
A clinical survey of amalgam restorations made with four proprietary alloys with low-silver and high-copper contents was followed during a two-year period, according to USPHS criteria. With the exception of one alloy, the marginal integrity was found to be very satisfactory. All the restorations lost their superficial luster in a short period of time.
Dental Amalgam↗