The invention discloses an in-vivo absorbable
lumbar limitation dynamic fixing device. The in-vivo absorbable
lumbar limitation dynamic fixing device comprises a first locker, a spacer and a second locker, wherein the first locker, the spacer and the second locker are connected in series through
mooring ropes. Buckles are arranged at the front end of the first locker, and locker fixing teeth are arranged at the
tail end of the first locker. Spacer fixing teeth are arranged at both ends of the spacer. Locker fixing teeth are arranged at the front end of the second locker, and buckles are arranged at the
tail end of the second locker. The locker fixing teeth can mesh with the spacer fixing teeth. The in-vivo absorbable
lumbar limitation dynamic fixing device is applied to lumbar posterior
fusion surgery on the basis of providing limited micro-motion, so that relatively rigid fixation to fusion segments at the initial stage is provided, and the movement of the fusion segments in all directions is limited; with healing of bone graft and the degradation of
magnesium alloys in the fixing device, fixed segments have limited micro-motion in all directions, so that the healing of the bone graft is promoted, and the stress and activity of an
adjacent segment are reduced; and finally, the
magnesium alloys are completely degraded to reduce
stress shielding.