The name, derived from the contraction of the words ceramic and metal, given to a group of glass ionomer cements to which metals such as silver and gold have been added. The metal particles are incorporated into the glass powder usually by using heat and pressure (sintering). Cermet is radiopaque and has been advocated as a core build-up material or as an alternative to amalgam for primary dentition restorations. These materials have been largely superseded by the resin modified glass ionomer cements. See also cement.