It is important in moving the mouth, facial expression and in dentistry. It derives its motor nerve supply from the facial nerve, and its blood supply from labial branches of the facial artery.

What is the modiolus of the mouth?

The modiolus is defined in various dental dictionaries as a point lateral to the corner or angle of the mouth where certain muscles of facial expression converge (Jablonski, 1982; Manhold and Balbo, 1985; Harty and Ogston, 1987).

What muscles attach to the modiolus?

In general, nine muscles attach to modiolus: Buccinator, risorius, orbicularis oris, depressor anguli oris, depressor labii inferioris, zygomaticus major, platysma pars modiolaris, levator anguli oris and mentalis. Most of these muscles have dermal terminations [4].