Post-operative Reaccessment on the Operated Levels of the Cervical Spine in Cervical Osteochondrosis

概要

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This is to reaccess the levels of the cervical spine operated for myelopathy in cervical osteochondrosis. For this purpose this study was restricted to 66 patients to whom anterior interbody fuion was carried out with myelographic investigations performed in both pre- and post operation.Of 66, 59 patients had had slight or mild abnormal myelographic findings before operation seen in the non-operative intervertebral space, except in 3 patients the findings got improved and in 9 worsened.Worsened findings were seen at the level adjacent to the level of fusion, especially at C4-5.Malalignment of the cervical spine after surgery is considered mainly to be the reason to make the level worsened, but this does not always correlate with the clinical results. Careful attention must be taken to the level of C4-5. When it has mild abnormal findings in myelography, the level of C4-5 is advisable to be operated from the view point of post-operative myelography.