The invention relates to a pharmaceutical composition comprising a siloxane according to general formula (I)<；wherein R means —C1-C6-alkyl；R1 and R2 each mean independently of one another —C1-C6-alkyl, or together form a (2n)-membered ring；and n is an integer of from 2 to 8；for use in combination with a pharmacologically active ingredient in the prophylaxis or treatment of a dental disorder.
