Park JH, et al. – This study assessed the safety as well as efficacy of closing–opening wedge osteotomy (fish–mouth pedicle subtraction osteotomy [PSO]) for sagittal plane deformity correction. Researchers also compared the radiographical outcomes for conventional– and fish–mouth PSO. Findings demonstrated that a larger magnitude of correction could be attained with fish–mouth PSO than classic PSO, without compromising spinal cord function, in patients with fixed sagittal plane deformity.