Vertebral plate replantation fixing device capable of grafting bone

Abstract

The invention discloses a vertebral plate replantation fixing device capable of grafting bones. The vertebral plate replantation fixing device comprises a vertebral plate fixing piece, a first fastening nail and a second fastening nail, the vertebral plate fixing piece comprises a fixing part and a bony contact part; one end of the bony contact part is fixedly connected with the fixing part; the bony contact part is provided with a first contact surface and a second contact surface, the first contact surface is used for being in contact with a residual vertebral plate, the second contact surface is used for being in contact with a vertebral plate to be replanted, and the first contact surface and the second contact surface are oppositely arranged; at least one bone grafting through hole is formed in the bony contact part in a penetrating manner; the first fastening nail and the second fastening nail are detachably connected with the fixing part. The first fastening nail and the second fastening nail are oppositely located on the two sides of the bony contact part. The vertebral plate can be obviously lifted, the volume of the vertebral canal can be enlarged, locking and fixing are stable, bone grafting is conducted through the bone grafting through hole, later-stage bone ingrowth is achieved, then strong connection of the vertebral plate to be replanted and the residual vertebral plate is achieved, irritation to surrounding soft tissue of the vertebral plate is small, and bone damage is reduced.

Description

technical field [0001] The present application relates to the technical field of medical equipment, in particular to a bone-graftable lamina replantation and fixation device. Background technique [0002] Total laminectomy is usually used for the treatment of tumors in the spinal canal and degenerative hypertrophic bony spinal stenosis, that is, to completely remove all the lamina at the back of the spine to reduce the pressure in the spinal canal, and has a decompression range Large, thorough, wide operative field, full exposure of the lesion and other characteristics. [0003] However, total laminectomy has the following problems: because almost all of the lamina has been removed, the spinous processes, lamina and even some facet joints in the posterior part of the spinal canal have been removed. On the other hand, the stability of adjacent vertebral segments is also affected, resulting in postoperative thoracolumbar instability and kyphosis deformity, and adjacent verteb...

AI Technical Summary

Problems solved by technology

[0003] However, total laminectomy has the following problems: because almost all of the lamina has been removed, the spinous processes, lamina and even some facet joints in the posterior part of the spinal canal have been removed. On the other hand, the stability of adjacent vertebral segments is also affected, resulting in postoperative thoracolumbar instability and kyphosis deformity, and adjacent vertebral degeneration after intervertebral fusion and internal fixation. and other problems, and the spinal dural sac nerve root is seriously adhered to the surrounding soft tissue, resulting in poor long-term postoperative effect

However, the lamina replantation fixation device in the prior art has at least the following defects: after the lamina replantation, the small and thin titanium plates and screws of the traditional cervical door opener are used, the fixation strength is small, and the number of fixation screws is large, which increases the operation time. Time; after the lamina replantation fixation device is fixed, the lamina cannot be lifted to expand the spinal canal space, so the volume of the enlarged spinal canal is often reduced again. Clinically, this phenomenon is called "re-closing the door", so that the decompression effect Disappeared again; bony fusion of reimplanted lamina was not considered

In the existing fixation methods, the whole lamina is first replanted and reset, and then the lamina is fixed with the lamina replantation fixation device. However, due to the limited operating space, it is difficult to lock the lamina replantation fixation device

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