TY - RPRT TI - Technical improvements in the sagittal split ramus osteotomy. AU - H Niederdellmann AU - V Shetty PY - 1989 DO - 10.1016/0030-4220(89)90295-8 UR - https://pubmed.ncbi.nlm.nih.gov/2911442/ ID - 2911442 ER -