Abstract
culated. The volume of the masseter muscle was reduced by 28.18%, 39.58%, 33.37%, and 31.18% at 3, 6, 12, and 18 months postoperatively, respectively. The cross-sectional area of 3 slices were reduced, but the sectional area of the lower slice had the sharpest decline, withreductionsof79.27%,84.39%,84.02%,and83.57% at 3, 6, 12, and 18 months postoperatively, respectively. Conclusions: The results showed that the masseter muscle undergoes significant atrophy after mandibular osteotomy, and these changes could be considered as a guide for the design and simulation of MASO before surgery.
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