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subtraction osteotomy(PSO),Thomasen in 1985. Heining et al eggshell osteotomy.,第九頁(yè),共二十二頁(yè)。,30 to 40 correction through all three columns, while avoiding stretch vessels and viscera anterior to the spine。 If performed in an asymmetric fashion, provide significant coronal correction as well。,第十頁(yè),共二十二頁(yè)。,type 2 sagittal deformity (SVA12 cm), sharp, angular kyphosis etl;,第十一頁(yè),共二十二頁(yè)。,A wide laminectomy is performed Osteotomy line horizontal to the sacrum Placing the temporary rod closed over the ro