Intervertebral fusion fixator for X-shaped excision decompression vertebroplasty of vertebral body

Abstract

The invention discloses an intervertebral fusion fixator, relates to the field of medical instruments, and aims to provide a fusion fixator which is matched with anterior cervical approach vertebral X-shaped excision decompression vertebroplasty and can shorten the bone crawling substitution distance, shorten the fusion time and increase the bone grafting fusion success rate. According to the technical scheme, the intervertebral fusion fixator for X-shaped excision decompression vertebroplasty of the vertebral body comprises a fusion fixing body and screws, the fusion fixing body is provided with three bone grafting cavities, the horizontal section of the first bone grafting cavity is in a fan shape, the outer sides of the two radiuses of the fan shape are the second bone grafting cavity and the third bone grafting cavity respectively, a fixing blocking piece is arranged above or below the arc edge of the fan shape, the fixing blocking piece is provided with a through hole and the first screw, and the first screw is used for being implanted into a replantation bone block; and fixing holes are formed in the arc edge of the first bone grafting cavity, and screws used for implanting residual vertebral bodies on the two sides and adjacent normal vertebral bodies are arranged in the fixing holes. The intervertebral fusion fixator is suitable for the anterior cervical approach vertebral X-shaped excision decompression vertebroplasty.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an intervertebral fusion fixator in orthopedic medicine. Background technique [0002] Anterior cervical corpectomy decompression and fusion (ACCF) is suitable for patients whose spinal cord decompression cannot be obtained by simple discectomy. For patients with both anterior spinal cord compression and posterior spinal cord compression, combined posterior spinal canal enlargement surgery may be considered on the basis of ACCF. For patients with vertebral body lesions (tumor, etc.), cervical dislocation, and kyphosis, ACCF is also an ideal choice. [0003] At present, the steps of subtotal corpectomy for cervical spondylosis are as follows: [0004] First, incision, exposure and positioning. An anterior cervical incision on the right side is used. The incision scar is smaller and the postoperative appearance is better. The length of the incision is generally 3-5 cm. The sk...

AI Technical Summary

Problems solved by technology

There are many deficiencies in ACCF surgery, including: (1) The distance spanned after ACCF resection of the vertebral body is longer, and the bone crawling replacement distance is longer, so the fusion time is longer, the fusion efficiency is lower, and the risk of reoperation and revision is higher

(2) The healing effect of bone grafting is poor and takes a long time, resulting in many patients who have not healed in June and December, and need to wear external fixation braces for a long time, which is not conducive to early rehabilitation and return to normal life and work of patients

(3) At present, titanium mesh is mainly used as implants. The titanium mesh is not fixed, and it is easy to shift into the spinal canal, causing paralysis. In addition, the titanium mesh is relatively sharp and has a small contact area, which is easy to puncture the vertebral endplate. causing the implant to sink

(4) If autogenous ilium, ribs, fibula, etc. are used for support, although the success rate of surgical fusion can be increased, it will increase surgical trauma and bring additional injuries to the patient, and increase the pain, hematoma, and infection of the patient's surgical bone harvesting area. complication

(5) In the existing technical scheme, the excised vertebral body mainly adopts the following two methods: first, grinding and drilling, when the grinding and drilling is grinding away the vertebral body bone, it is washed with water to dissipate heat, and the bone chips are together with the washing liquid It is wasted; secondly, use a rongeur to bite it off and use it as broken bone to fill the titanium mesh. The resected vertebral bone cannot be reused as a bone graft material that can support the vertebral body for secondary use

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