Most commonly, fluoride is applied topically to the teeth using gels, varnishes, toothpaste/dentifrices or mouth rinse.
en.wikipedia.org These are related to the level in question, and include things like toothpaste, fish food and baked beans.
en.wikipedia.org He showers every time he goes out and (secretly, he thinks) takes with him a toilet bag containing mouthwash, toothbrush, toothpaste and wet-wipes.
www.dailymail.co.uk Many traditional remedies have been suggested for bee stings including damp pastes of tobacco, salt, baking soda, papain, toothpaste, clay, garlic, urine, onions, aspirin or even application of copper coins.
en.wikipedia.org