An overly wide, square or rectangular face can be due to a hypertrophic masseter muscle, and is often seen among Asians.
A study published in the Journal of Plastic and Reconstructive Surgery) has allowed us to classify masseter hypertrophy. The study defines five degrees of (minimal, mono, double, triple and excessive) and three degrees of thickness (<10 mm, 10 -14 mm, > 14 mm).
Excessive width of the lower face can be caused by three factors:
– The bone structure.
– The presence of fat.
– A large masseter muscle.