Serial Changes in Signal Intensities of the Adjacent Discs on T2-Weighted Sagittal Images after Surgical Treatment of Cervical Spondylosis: Anterior Interbody Fusion Versus Expansive Laminoplasty

摘要

Background. There have been many reports about newly developed degenerative changes in the adjacent segments after anterior interbody fusion. It is a controversial issue whether the adjacent-segment disease in patients treated by anterior interbody fusion is the result of progressive cervical spondylosis at the adjacent levels or is caused by the arthrodesis. The aim of this study is to clarify the difference in postoperative effect on the adjacent segments between anterior interbody fusion and expansive laminoplasty.