Abstract
The alignment of the cervical spine fused anteriorly was investigated in 123 cases and compared with that of preoperative cervical spine films. We classified postoperative alignment as follows. Type I: No change, 55 cases (44.7%). Type II: decreased, Lordosis 18 cases (14.6%). Type III a: Increased lordosis above fusion compensated for decreased lordosis of fused bodies, 13 cases (10.6%). Type III b: Increased lordosis below fusion compensated for decreased lordosis of fused bodies, 7 cases (5.7%). Type III c: Increased lordosis both above and below fusion compensated for decreased fused bodies, 6 cases (4.9%). Type IV: Kyphotic change, 15 cases (12.2%). Type V: Increased lordosis by increased lordosis of fused bodies, 9 cases (7.3%).It was concluded that each type bore no relation to the postoperative JOA score, but had relation to unidentified complaints (type III c, type IV, type V): and that the S curve or hypo-lordotic curve before operation tended to change malalignment (type III c or type IV).
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