Correction of the square face by resection of excess masseter muscle and removal of hyperostotic bone from angle of the mandible and chin osteotomy by the intraoral approach

Objective TO treat the deformity of square face by resection of severe hypertrophic masseteric muscle and mandible outer cortex and angle combined chin osteotomy.Methods The mandible outer cortex were rescted by modified mandible split osteotomy,and mandible angle by oscilating saw,and escess masseteric muscle by scissor.The horizontal osteotomy was combined with an interpositon bone graft for vertical elongation of the anterior portion of the mandible and for increasing the prominence of the chin.All were done by intraoral approach.Results Seven patients with hypertrophic masseter muscle and bony exostosis of mandible and short chin were treated using the method,and good results were achieved,and the patients had beautiful facial contour.Conclusion Combined resection of mandible outer cortex and angle and masseter muscle to treat severe masseteric muscle hypertrophy and bony exostosis of mandible combined with genioplasty could achieve good result for improving square face.