Neem is often added to toothpaste. In his book "Neem: A Treatise," K.K. Singh describes the practice of chewing neem twigs in India for maintaining oral health. According to "Medicinal Plants of the World" by Ivan A. Ross, neem bark possesses antibacterial, antiviral and antifungal properties, which may account for its effectiveness in oral hygiene. Ross also mentions that neem is traditionally used in Senegal to treat gingivitis.
Neem is also used as a anthelmintic -- a substance that expels parasites such as tapeworms from the body.
The Herbal Encyclopedia lists traditional uses for neem tree, including as a topical application on wounds, burns and scrapes. K.K. Singh professes that neem is also used to reduce fevers, treat skin conditions and improve the symptoms of leprosy.
Neem tree oil repels mites, nematodes, snails and all manner of insects. It is a natural alternative to commercial insecticides.
Neem should not be used by pregnant women, as it is an emmenagogue, or a substance stimulating menstruation.