Finishing Finishing Burs are specifically designed for the shaping and finishing of all dental materials.A smoother, more aesthetically pleasing surface can be achieved with carbide finishing burs as opposed to diamonds for most restorative materials. Carbide burs should be used to trim and finish macrofilled composites and hybrid composites. Grinding & polishing diamonds should be used to trim and finish microfilled composites. Coarse grinding tools leave behind striations; fine and extra fine diamonds are suitable for finishing.