Dental polishing is done to smooth the surfaces of teeth and restorations. The purpose of polishing is to remove extrinsic stains, remove dental plaque accumulation, increase aesthetics and to reduce corrosion of metallic restorations. Tooth polishing has little therapeutic value and is usually done as a cosmetic procedure after debridement and before fluoride application. Common practice is to use a prophy cup-a small motorized rubber cup-along with an abrasive polishing compound.