Radiofrequency Volumetric Reduction for Masseteric Hypertrophy

Abstract

Masseteric hypertrophy occurs frequently among Asians, including Koreans, because of racial characteristics and dietary habits. It is thought to be an unpleasant feature, especially because of its strong and masculine impression. Recently, the authors developed a method for the volumetric reduction of hypertrophied masseter muscles using radiofrequency energy to correct the squared facial appearance caused by the hypertrophy. This study was performed to investigate the effects of radiofrequency applied to reduce hypertrophied masseter muscles of patients who sought an aesthetic alternative for a slim, smooth, and feminine-looking lower facial contour. A total of 340 patients were treated. The patients usually recognized the volume change 3 to 6 weeks after treatment, and an objective volume reduction was observed within 3 months of the operation. The range of the reduction in the masseter thickness, as measured by ultrasonic examination at a 6-month postoperative follow-up visit, was 10% to 60% (mean, 27%). Most of the patients could eat a nearly normal diet after 4 weeks and were satisfied with the improved aesthetic contour lines of their lower face. Radiofrequency-induced coagulation tissue necrosis of the masseter did not cause any infections or limitations of mouth opening, and the clinical improvement was well maintained after the treatment.

Auxiliary usage of botulinum toxin A in plastic surgery in China

“…It is fan‐shaped, and originates from the inferior margin and the medial surface of the zygomatic arch and ends on the lateral surface of the mandible. Masseteric hypertrophy is usually associated with mandibular angle prominence and inappropriate habits, such as clenching and bruxism . In 2001, von Lindern et al reported that BTA injection can reduce the masseter muscle's volume.…”

A comparative study of the efficacy and safety of radiofrequency ablation and botulinum toxin A in treating masseteric hypertrophy

“…Botulinum toxin A injection for the treatment of masseteric hypertrophy is popular due to the simplicity of the procedure and the rapid postoperative recovery times (6). In 2007, Jin Park et al first reported on the usage of RF ablation for the correction of masseteric hypertrophy in 340 patients and achieved favorable clinical results (3). To date, there have been no studies comparing the treatment and side effects of injection with botulinum toxin A with those of RF ablation for the treatment of masseteric hypertrophy.…”

“…However, a previous study has reported that a mild injury to the facial nerve and parotid duct may occur postoperatively (3). In order to avoid parotid duct and facial nerve injury, in the present study, a new needle electrode was designed that reduced the amount of mucosal injury.…”

“…To date, the major treatment methods involve surgery, including mandibular angle osteotomy and masseter muscle resection, and there are non-surgical methods, including injection with botulinum toxin type A (1,2). Jin Park et al reported on radiofrequency (RF) volumetric reduction for masseteric hypertrophy (3). RF-induced tissue coagulation necrosis of the masseter muscle did not lead to any infections or limitations with regard to mouth opening, and the clinical improvement was well maintained following treatment (3).…”

“…Jin Park et al reported on radiofrequency (RF) volumetric reduction for masseteric hypertrophy (3). RF-induced tissue coagulation necrosis of the masseter muscle did not lead to any infections or limitations with regard to mouth opening, and the clinical improvement was well maintained following treatment (3). However, thus far, there have been no studies on the efficacy and safety of RF and injection with botulinum toxin A for the treatment of masseteric hypertrophy.…”