During jaw reduction, the lower third of the face is narrowed, particularly the lower jaw and its attachments to the muscles. Jaw reduction can be done in a both ways surgical and non-surgical. Among Asians, where a slender profile is considered desirable, jaw reduction is most common. As opposed to Caucasians, who are less proficient in this area and will need to have their abilities increased rather than reduced.
An example of a Jaw reduction involves the surgical reduction of the lower jaw angle or the mandible. It entails cutting off the jaw angle through an incision inside the mouth. This results in a rounder angle for the jaw instead of an acute one. As a result, the jaw angle will be softened, and the jawline will be raised from front to back. It is possible to extend the bone cut from the angle of the jaw forward to the middle of the body of the jaw to narrow the bone more. It does not take into account the amount of muscle over the bone in this procedure.
Thinnish muscles cannot be surgically removed without causing pain and causing long-term restrictions in mouth opening. In other words, how effective jaw angle reduction is will depend more or less on the amount of fullness caused by the jaw bone. The reduction of the bony jaw angle will always produce a visible external difference.
Botox injections are a non-surgical way to reduce the angle of the jaw. The muscle-paralyzing drug appears to be ineffective for long-term Jaw reduction (atrophy), but it has been shown to do so. It takes about 40-50 units of Botox for each side, and it has to be repeated every 4 months or so for up to a year or longer, but it is noticed the masseter muscle progressively shrinks over time. After the muscle shrinks and is partially paralyzed we can able to chew.