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 @entity1 treated by anterior interbody fusion is the result of progressive @entity4720 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. METHOD: This study included 14 @entity1 who underwent pre- and postoperative MR images at 6 and 12 months. Seven @entity1 underwent cervical interbody fusion and the other 7 @entity1 underwent expansive laminoplasty. @entity1797 was evaluated semiquantitatively by calculating the degenerative index (DI) that is a ratio of the intensity in the disc to that in the upper cervical cord. FINDINGS: In the anterior interbody fusion group, the adjacent disc intensities decreased within 12 months (F = 20.42; P < 0.01). The pre-operative mean DI was 0.59 +/- 0.16. The post-operative mean DIs were 0.56 +/- 0.16 at 6 months and 0.47 +/- 0.16 at 12 months. In the expansive laminoplasty group, the signal intensities of both the adjacent discs and the discs within the range of laminoplasty had no serial changes during the same period (F = 2.67; P = 0.09 and F = 0.15; P = 0.87 respectively). INTERPRETATION: Anterior interbody fusion had a significant influence on the adjacent discs even as soon as 12 months after surgery, but laminoplasty had no influence on them during the same period.

Serial changes in signal intensities of the adjacent discs on T2-weighted sagittal images after surgical treatment of XXXX : anterior interbody fusion versus expansive laminoplasty.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1797 :: ('MESH:D055959', 'Disease') :: ['Disc degeneration'] @entity4720 :: ('MESH:D055009', 'Disease') :: ['cervical spondylosis']
@entity4720 :: (MESH:D055009,Disease) :: ['cervical spondylosis']
