No implant-related complications (screw loosening or breakage) or loss of correction were observed.
没有内置物相关并发症(螺钉松动或断裂)或矫正丢失。
2
BACKGROUND: Pedicle screw which passes through the three columns and has three-dimensional correction function, which has quickly become the standard posterior spinal internal fixation.
背景：椎弓根螺钉贯穿脊柱前中后三柱，具有三维矫正作用，已成为标准的脊椎后路内固定方法。
3
But loss of correction and screw loosening often occurs in patients with osteoporosis, or screw has less stability in revision surgery and re-adjust of screw position.