Correction of facial asymmetry deformity using modified BSSRO and fixation method

Abstract

Abstract: PURPOSE: To investigate the clinical application of reserving the proximal bone segment in the concave side, and osteosynthesis with three bicortical titanium screws placed in a triangular shape for stabilization during bilateral sagittal split ramus osteotomy (BSSRO) for correction of facial asymmetry deformity. METHODS: Between January 2013 and July 2013, 8 adult patients with lateroprognathism in Shanghai Ninth People’s Hospital underwent orthognathic surgery. The asymmetry in the masseter region was evaluated based on clinical examination and three-dimension CT examination. After regular maxillary LeFort I osteotomy and BSSRO, the proximal bone segment in the hypertrophy side was resected and fixed using four-hole mini-titanium plate whereas the proximal bone segment in the concave side was reserved, and osteosynthesis with three bicortical titanium screws placed in a triangular shape for stabilization. The security and validity of the method were evaluated based on the examination of facial symmetry 3 months after operation：the face asymmetry was measured on postero-anterior(P-A) cephalogram. The data was compared before and after surgery with paired t test using SPSS 20.0 software package. RESULTS: The facial asymmetry in all 8 patients was effectively corrected, and radiographic facial asymmetry was found obviously decreased (P<0.05) and no complications were noted. CONCLUSIONS: Reserving the proximal bone segment in the concave side, and fixed with three bicortical titanium screws placed in a triangular shape could effectively and safely correct the facial asymmetry deformity.

Key words: Facial asymmetry deformity, Modified BSSRO, Orthognathic surgery

HUANG Li, LIU Zhi-xu, ZHANG Lei, SHEN Shun-yao, WANG Xu-dong. Correction of facial asymmetry deformity using modified BSSRO and fixation method[J]. China Journal of Oral and Maxillofacial Surgery, 2014, 12(1): 30-34.

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