Acrylic and ceramic coated metal crowns change colour in the course of time. The metal shade is often seen through the ceramic coating especially in the margins. Such crowns will have a lifeless look as it doesn’t pass light through it where as natural teeth does. Similarly silver fillings too show through the enamel and the whole tooth looks dark after a few months or years. Today we have metal free crowns and bridges at affordable cost. Metal free crowns merge naturally with the neighbouring teeth in terms of shade and texture. Since they are transparent in nature, it looks like a natural teeth. Similarly we use composite materials instead of existing metal fillings. Opaque cements are used to mask the discolouration caused to the natural teeth. Once polished they look as natural teeth.