Neem has been a natural dental hygiene solution for centuries. In Africa and parts of India, people have historically used the twigs of a neem tree to brush their teeth. As a result, these people have been able to maintain excellent dental health. This still holds true even in areas that don't have what Westerners would view as modern dental care.
Neem is effective for dental health because it has such great cleansing properties. These properties help keep impurities from sticking to your teeth. Nearly all parts of a neem tree have effective cleansing properties, including the seeds, twigs, and leaves; several studies have shown that using neem toothpaste can significantly improve the cleanliness of your mouth.