“…The advantages of posterior approach include indirect decompression without destabilizing the disc space, intuitive operation while exposing multiple levels, and less risk of postoperative instability and adjacent level degeneration compared with the anterior approach. As the adverse outcomes after laminectomy, such as segmental instability, kyphotic deformity, perineural adhesions and late neurologic deterioration, are recognized [3,27,28], various forms of laminoplasty have been developed to avoid these complications. Studies have reported that the surgical outcomes of laminoplasty are more satisfactory [1,18,21,45], but postoperative problems, such as axial pain, C5 palsy, restriction of neck motion and loss of lordotic curvature, are also noted [10, 11, 15, 18-20, 27, 35].…”