Figure 4

A modified Obwegeser-Dal Pont bilateral sagittal split osteotomy (BSSO) technique was adopted in all included patients. After lingual and buccal corticotomies (3-mm spherical bur and Lindeman side-cutting bur) and sagittal osteotomy (reciprocating saw), a Dautrey osteotome was passed beyond the location of inferior alveolar nerve under direct visualization through anterior opening and driven to complete the splitting of the mandibular ramus.