Fig. 2
Comparison of cervical sagittal imaging parameters between two surgical approaches. a–d PODL secured with titanium miniplates (centerpiece). a Preoperative lateral cervical X-ray showed cervical degenerative and multi-segment spinal stenosis, with C2-7 SVA of 10.6 mm. b Preoperative cervical MRI showed multi-segment spinal compression at C3-7 segments. c At 1 month after surgery, lateral cervical X-ray showed that there was apparent increase of cervical canal width, with significant cervical anteversion and C2-7 SVA of 29.6 mm. d At 2 years after surgery, lateral cervical X-ray indicated good position of the titanium miniplates, and there was significant improvement of cervical anteversion, with the C2-7 SVA of 12.1 mm. e–h PODL secured with silk anchors. e Preoperative lateral cervical X-ray showed cervical degenerative and multi-segment spinal stenosis, with C2-7 SVA of 20.5 mm. f Preoperative cervical MRI showed multi-segment spinal compression at C3-7 segments. g At 1 month after surgery, lateral cervical X-ray showed that there was apparent increase of cervical canal width, with significant cervical anteversion and C2-7 SVA of 33.6 mm. h At 2 years after surgery, lateral cervical X-ray indicated good position of the anchors, and there was mild improvement of anteversion, with the C2-7 SVA of 29.1 mm