Temporal volume increase after reduction of masseteric hypertrophy utilizing incobotulinumtoxin type A

Area of Science:

• Aesthetic medicine
• Facial anatomy
• Neuromodulator treatments

Background:

• Masseter muscle hypertrophy treatment with neuromodulators can alter facial shape.
• Incobotulinumtoxin Type A treatment for masseter hypertrophy was observed to increase temporal volume.

Purpose of the Study:

• To objectively assess the increase in temporal volume after treating masseteric hypertrophy with incobotulinumtoxin Type A.

Main Methods:

• Nine female patients with masseteric hypertrophy received incobotulinumtoxin Type A.
• Masseter prominence and temporal volume were assessed by raters.
• Temporal fossa volume was measured using 3D volumetric imaging.

Main Results:

• Incobotulinumtoxin Type A reduced masseter prominence, indicating decreased hypertrophy.
• A significant improvement in temporal volume and an increase in temporal fossa volume were observed.
• Injection technique (single vs. multi-injection) did not yield statistically significant differences in measurements.

Conclusions:

• Treatment of masseteric hypertrophy with incobotulinumtoxin Type A can lead to increased temporal fossa volume.
• This compensatory increase in temporalis function suggests a full-face approach for aesthetic treatments.
• The findings offer an additional method for enhancing temporal volume in aesthetic procedures.