Cervical-vertebrajoint replacement device with vertebralpartial resection

Abstract

The invention relates to a cervical-vertebrajoint replacement device with vertebralpartial resection. The cervical-vertebrajoint replacement device with vertebralpartial resection comprises an upper hemivertebraprosthesis, a lower hemivertebraprosthesis and a cup-and-ball-jointintervertebral discprosthesis, wherein the lower surface of the upper hemivertebraprosthesis and the upper surface of thelower hemivertebraprosthesis are each provided with a clamping groove, the upper end and the lower end of the cup-and-ball-jointintervertebral discprosthesis are each provided with a buckle for beingin buckling cooperation with the clamping groove, and the upper surface of the upper hemivertebraprosthesis and the lower surface of the lower hemivertebraprosthesis are each provided with a fixing bolt. According to the cervical-vertebrajoint replacement device with vertebralpartial resection, three parts separated combinationprostheses are adopted, the space between the upper hemivertebraprosthesis and the lower hemivertebraprosthesis is adjustable, the cervical-vertebrajoint replacement device can be used for patients with obviously-narrow partial intervertebral space and patients withcompression factors located behind the vertebral body, and the indication range of a CDA operation is widened; a space structure is a 'metal to metal' space structure, an environmental basis formed by HO is eliminated accordingly, the side effect formed by an inhibition bone of NSAIDs does not need to be considered, HO prevention can be trustingly carried out with the NSAIDs, and the occurrence rate ofheterotopic ossification is decreased.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a cervical joint replacement device with partial vertebral body resection. Background technique [0002] Cervical disc degeneration disease (CDDD) is a common disease with a high incidence rate, and the previous treatment method is mainly anterior cervical discectomy and fusion (ACDF). However, ACDF will cause accelerated degeneration of adjacent segments due to increased compensatory activity of adjacent segments, which is the so-called adjacent segment disease (ASD). As a result, artificial cervical disc replacement (cervical disc replacement, CDR) came into being. [0003] Artificial cervical disc replacement surgery can not only solve the patient's neurological symptoms, but also preserve the physiological range of motion of the original segment. It mainly includes metal endplates and intervertebral joints 1. Metal endplates: It is the structure where the prosth...

AI Technical Summary

Problems solved by technology

[0009] The prior art has the following disadvantages: 1. Spongy bone hemorrhage and a large amount of bone chips will occur during the bony endplate grinding process, which provides a suitable environment and conditions for postoperative heterotopic ossification; 2. For the compressive factors located behind the vertebral body (not behind the intervertebral space), it is difficult to effectively decompress through the intervertebral space due to the limited anterior surgical field; 3. The current cervical intervertebral disc device is not suitable for patients with too narrow intervertebral space It is difficult for patients to perform their proper motion function within the limited intervertebral space height because of the implanted posterior intervertebral disc prosthesis; 4. All cervical intervertebral disc prostheses on the market adopt "initial mechanical fixation, long-term biological fixation" This fixation method depends on the fusion between the prosthesis and the bony endplate, so some patients may experience bone non-fusion due to various reasons, which may lead to loosening, subsidence or even prosthesis prosthesis prolapse , leading to serious consequences; at the same time, due to the "inhibition of bone formation" effect of NSAIDs, it is difficult to routinely use NSAIDs for HO prevention after artificial disc implantation

Images