Causes of Excessive Overcorrection After Square Jaw Surgery (So-Called “Witch’s Chin”) and How to Correct It

During square jaw surgery, if the surgeon’s experience is somewhat limited, the result that is most easily produced is overcorrection

 

In such cases, not only does the contour of the lower jawline become unnatural, but the possibility of permanent damage to the mandibular alveolar nerve also increases.

 

Figure 1.

If the contour of the lower jawbone is refined into a line like the one above, not only does the angular part of the jawline become excessively reduced, but there is also a high possibility that an awkward secondary angle will form in the area connected toward the front (the creation of a new angular area where there was none before).

 

Figure 2.

The unnatural straight contour caused by overcorrection of the angular area, and the new angular area that appears lower near the front lip

 

 

 

With this kind of unnatural line caused by incorrect square jaw surgery, a certain degree of contour correction is possible by refining the secondary angle that has formed toward the front.

Figure 3.

When refining the area where the secondary angle has formed

Figure 4.

The contour line after refining the anterior secondary-angle area