Sylc® is designed to provide a prophylaxis treatment for dental enamel and to physically occlude dentin tubules for the management of sensitive teeth. Sylc® is a dry powder (calcium sodium phosphosilicate), composed of elements that occur naturally in the body’s hard tissues (Ca, Na, Si, P, and O). When exposed to an aqueous environment, Sylc® undergoes a rapid surface reaction, allowing it to physically adhere to exposed dentin and to physically occlude tubules. Within a short period of time, essentially all of the Sylc® reacts to form hydroxycarbonate apatite (HCA), which is chemically similar to natural tooth mineral.