A method of improving the condition of teeth in a human mouth by continuing events of applying a composition containing calcium and a source of OH− ions, optionally in combination with amino acid/protein containing casein, so that the composition mixes with saliva and forms a slurry, followed by swishing the result around in the human mouth; the method also including, between at least two continuing events, applying a more solid composition that contains calcium and OH− and optionally casein, to problem areas of the teeth, such as where they are worn or chipped, and maintaining the contact by not intentionally removing it.