TANDZORG.NL mainly uses composite resin for filling a cavity. Composite resin is available in all shades. The advantage of using composite resin over metal amalgam is that less drilling is required and maximum amount of the tooth is preserved. In addition, the composite resin bonds to the surface of the tooth, thus reinforcing the tooth. A composite resin filling also looks better than a darker amalgam filling as it blends in perfectly with the colour of natural teeth. Making it (almost) indistinguishable from your own teeth.