3D-printed cervical total spondylectomy implantable prosthetic device

Abstract

The invention discloses a cervical total spondylectomy implantable prosthesis device of 3D printing. With a cervical CT scanning sample of a patient as a template, the prosthesis device is made from medical titanium alloy by conducting three-dimensional construction and prosthesis design through 3D printing. The prosthesis device comprises an anterior device and a posterior device, wherein the anterior device comprises a C-shaped inner supporting structure, a C-shaped outer moving structure and a cross-form convex structure; and the posterior device comprises a spinous process simulation fixing device and four medical cervical screws. According to the prosthesis device provided by the invention, via the anterior device, an axial supporting effect is achieved between upper and lower adjacent vertebral bodies, and the anterior device can be stably kept on a fixed position and can show relatively strong activity in overall torsion and lateral curvature motions of cervical vertebra; and via the posterior device, upper and lower spinous processes of the cervical vertebra and related parts can be fixed, so that four fixed surfaces are accurately located on a transverse process via the screws, and an excised cervical vacancy space is supplemented; therefore, discomfort of an in-vivo or external form can be relieved.

Description

technical field [0001] The invention relates to medical supplies, in particular to a 3D printed implantable prosthetic device for total cervical spondylectomy. Background technique [0002] According to statistics, the probability of spinal metastases in patients with malignant tumors is 30% to 40%, which will affect the strength of the spine and cause spinal instability. As the disease progresses, it will compress the nerve roots or spinal cord, resulting in high disability and mortality. According to the development of spinal surgery treatment concept and technology, total spondylectomy has become one of the clinically recognized effective treatment methods for spinal tumors. However, total spondylectomy will lead to complete transection of the cervical spine while completing the resection of the diseased vertebra and decompression of the spinal cord. Internal fixation devices must be implanted to ensure the stability of the reconstructed segment and provide sufficient mec...

AI Technical Summary

Problems solved by technology

There are existing treatment options such as dynamic cervical implant (DCI) implantation and anterior cervical discectomy and fusion (ACDF). The loss of length is serious, and "titanium mesh reconstruction + anterior plate fixation + posterior upper and lower pedicle screws" must be used for auxiliary fixation. After the operation, the loss of motion of the injured segment reaches 86% to 91%, and the range of motion of adjacent segments Significantly enlarged, although the fixation performance is strong, but the mobility is almost zero; the latter is used to replace the intervertebral disc and maintain its stability, although it can achieve sufficient mobility, it cannot be effective in cases of single or multiple cervical injuries effect

In the past, due to the limitations of science and technology, the implementation of surgical plans only relied on metalworking processing of basic parts, which caused great damage to the original bone and could not achieve considerable therapeutic effects; in the exploration of recent years, with the rapid development of 3D printing technology, medical metals that can replace bones 、Ceramic texture bio-tissue materials have been successfully developed, so that the damaged spinal segment (lesion) after total spondylectomy can be replaced by a bio-imitation prosthetic device

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