HALLE, Germany: Antiseptic mouthrinses containing chlorhexidine commonly cause tooth discoloration after eating or drinking during treatment. A study by the Fraunhofer Institute for Microstructure of Materials and Systems IMWS in Halle explored the extent to which certain beverages can prevent this discoloration in patients undergoing chlorhexidine treatment. The study’s findings suggest a simple solution for dental professionals to recommend to their patients during the treatment period: adding milk when drinking tea or coffee.