Widening a small mouth
Dr. Plavic is spot on with his assessment of the limitations of widening a small mouth. In general, patients should not alter the very delicate commissural structures that make up the corner of the mouth unless they are quite off spec because of the visible scarring and unnatural appearance that a commissuroplasty causes.
However, there are a number of patients who have apparent microstomia. In fact, the corners of the mouth are simply not visible. It is a very...