Botulinum Toxin Versus Placebo Injections to Temporalis and Masseter Muscles

Myofascial pain is classically used to describe pain experienced in the masticatory muscles and its associated structures (Freund 1999). It afflicts nearly 10% of Americans (Freund 2000). There have been many described treatments such as the use of oral appliances, non-steroidal anti-inflammatory medications, physiotherapy, behavioral therapy and counseling, acupuncture, and …