Fig. 4

Radiological comparison between TSO and MRSO. (a–d) One person who received TSO, no significant changes in IMA and DMAA before and after operation. However, the HVA was increased one month after TSO, it relapsed four months after TSO. “a” represents pre-surgery; “b” represents post-surgery; “d” represents one month post-surgery; “d” represents six months post-surgery. (e–h) Another person who received MRSO, IMA and DMAA were obvious changed before and after surgery. “e” represents pre-surgery; “f” represents post-surgery; “g” represents one month post-surgery; “h” represents six months post-surgery. The osteotomy end heals faster in the person who received TSO compared to another person in TSO. Because of the “lock” structure that formed by the rotation in MRSO, single screw fixation does not affect its stability. Compared with double-screw fixation, the potential correction ability of single-screw is stronger, and its postoperative IMA and HVA are significantly changed