**2. Bilateral sagittal split ramus osteotomy (BSSRO)**

The history of orthognathic surgical techniques goes back to the mid-1800s. Both in Europe and the USA, the corrective jaw surgeries at their first steps begun to be heard by the population. Schuchardt was the author who first described the sagittal split in 1942 in German literature [1]. In English literature, Trauner and Obwegeser were the pioneers in 1957 who described and discussed the technique in detail [2]. Dal Pont [3], Hunsuck [4], and Epker [5] all added modifications to the technique such as to maintain more surface contact between bony segments at outer cortex, obtaining a minimal horizontal cut in the medial surface of ramus just beneath the lingula and minimal muscle detachment to avoid postoperative blood loss and hematoma.
