+ Incision length which was 25.11 ± 1.77 mm in one-vertebrae surgery, was 31.12 ± 1.54 mm in 02-vertebrae surgery.
+ Đặc điểm độ dài vết mổ: Độ dài vết mổ 01 tầng: 25,11 ± 1,77 mm, 02 tầng: 31,12 ± 1,54 mm.