The use of Botox in dentistry has become very popular and is now widely used. Botox is a neurotoxin injection that is produced by the bacterium Clostridium botulinum. It has been used by doctors to treat wrinkles, fine lines, and other facial creases. However, it has also been used in dentistry to help treat temporomandibular joint (TMJ), teeth grinding, jaw clenching, and facial pain (such as from chronic TMJ).