Comparison of clinical marking and ultrasound-guided injection of Botulinum type A toxin into the masseter muscles for treating XXXX and its cosmetic effects.

@entity1184 @entity1 @entity8599
BACKGROUND: Botulinum toxin type A has been used for treating the @entity1184 of the masseter muscles and its cosmetic effects. Ultrasound is increasingly used in dermatology, along with the guidance of mini-invasive procedures. AIMS: To evaluate the role of ultrasound for guiding the application of Botulinum A toxin in @entity1 with cosmetic alterations due to @entity8599 , correlate the clinical landmarks with the ultrasound findings, and study the effect on the symptoms, cosmetics, and quality of life. @entity1 /METHODS: Twenty individuals with @entity8599 and cosmetic alterations underwent an ultrasound-guided injection of Botulinum toxin type A in each masseter muscle. Clinical and ultrasound marking of the procedure was compared. Clinical and sonographic evaluation was performed at the time of injection and 3 months later. Ten normal individuals underwent ultrasound of the masseter muscles as a control group. RESULTS: Up to 65% of individuals showed anatomical variants of the salivary glands. The method for clinically marking the skin showed a frequently erroneous location of the anterior point (up to 40% of cases) that was proven by ultrasound to be out of the muscle. In 20% of cases, ultrasound showed that the needle should be longer to enter the muscle. After injection, most of the @entity1 demonstrated a decrease of the symptoms and cosmetic and quality of life improvements. CONCLUSIONS: Ultrasound can be a potent tool for guiding the injection of Botulinum toxin into the masseter muscles. It may contribute to a more personalized procedure, better cosmetic results, and help to avoid potential complications.
