Masticatory muscles, hypertrophy of

This study tested whether BOTOX injections can safely reduce the size of the masseter muscle, which can make the lower face look wide. About 200 adults with noticeable muscle prominence received either BOTOX or a placebo. The goal was to see if the treatment improved appearance a…

This completed Phase 3 study tested whether BOTOX injections can safely reduce the appearance of a widened lower face caused by prominent masseter (chewing) muscles. About 207 adults with moderate-to-severe muscle prominence received either BOTOX or a placebo in both sides of the…

This study tests whether BOTOX injections can reduce the prominence of the masseter muscle, the chewing muscle that can make the lower face look wide or square. About 250 Japanese adults with marked or very marked masseter muscle prominence will receive either BOTOX or a placebo …

This study tested three treatments for chronic teeth grinding (bruxism): dry needling and two types of botulinum toxin (Botox). 72 adults with severe jaw pain were split into three groups. Researchers measured pain levels and jaw muscle thickness before treatment and up to 3 mont…

This small study looked at 17 adults with bruxism (teeth grinding) who received Botox injections into their jaw muscle. Researchers used ultrasound to measure muscle thickness and texture before treatment, at 14 days, and at 90 days. They also tracked pain levels. The goal was to…

This study tested whether BOTOX injections can safely reduce the size of the jaw muscle, making the lower face look slimmer and more oval. About 249 adults with a very prominent jaw muscle received either BOTOX or a placebo. The goal was to see if BOTOX could improve the appearan…