A: MasterCard Contactless is a 'contactless' way to pay for purchases under R200. It's like having exact change wherever you go. A simple tap of your card, key fob or contactless-enabled mobile phone is all it takes to pay at the checkout.
Fillings. Fillings are used to repair a cavity in your tooth caused by decay. The most common type of filling is dental amalgam, made from a mixture of mercury and different metals. Dental amalgam fillings are often used on your back teeth as they are hard-wearing.
Replacing Sound Fillings. Amalgam fillings (silver) are a mixture of different metals such as 65% silver, 6% copper,2% zinc and 25% tin bound with elemental mercury. Trituration is the process of mixing these alloys together with mercury.The mercury makes up between 45-50% of the mixture and acts as glue that binds these metals into a hard stable, and safe substance that can last for decades. These fillings usually last 12 years or longer.rituration is the process of mixing these alloys together with mercury. The mercury makes up between 45-50% of the mixture and acts as glue that binds these metals into a hard stable, and safe substance that can last for decades. These fillings usually last 12 years or longer.