Adjustable fusion cage for semi-vertebral malformation

Abstract

The invention discloses an adjustable fusion cage for semi-vertebral malformation, belonging to the field of medical instruments. The fusion cage is an in-vivo implantation component which is arrangedat the depressed part of the semi-vertebral malformation, and the implantation component and an in-vivo contact component are made of titanium alloy. The fusion cage comprises an extension part and abase, wherein the center portions of the extension part and the base are connected through a lead screw; the extension part is rotationally connected with the upper end part of the lead screw; a shell is arranged on base; lead screw nuts are arranged at the periphery of the part, located at the inner upper portion of the shell, of the lead screw; the lower part of the lead screw is connected withthe output end of a reducer; an input end is arranged on the lower part of the reducer; and a permanent magnet is arranged at the input end and matched with an in-vitro magnetic control driving device. With the adjustable fusion cage, the anterior column of the spine can be supported, so a force bearing position is more reasonable, and the excision operation of the semi-vertebral body is omitted;and meanwhile, operation frequency is reduced, multiple times of operation wounds are avoided, and operation risks are reduced.

Description

technical field [0001] The invention relates to a fusion device, in particular to an adjustable fusion device for hemivertebra deformity, and belongs to the field of medical instruments. Background technique [0002] Hemivertebrae deformity is one of the most common causes of congenital spinal deformity. This disease has an early onset, rapid progression, and is prone to severe spinal deformity, which will cause the overall trunk to lose balance and cause damage to cardiopulmonary and neurological functions. , greatly reducing the quality of life of patients and increasing their social and psychological pressure and economic burden. For patients with hemivertebrae deformity, the main treatment at present is hemivertebra resection, which is traumatic and slow to recover. Children with hemivertebrae deformity have a certain impact on growth and development after surgery. With the advent and development of screw technology, hemivertebra correction has gradually developed due t...

AI Technical Summary

Problems solved by technology

[0007] In view of the fact that the growth rods in the prior art need to be opened regularly with the growth of the child, the domino connecting block is easy to get stuck and the trauma is large; while the non-contact electromagnetically driven non-invasive growth rods used for scoliosis correction cannot lower the hemivertebra Deformity trauma and operation time, as well as problems such as growth rod breakage, the present invention provides an adjustable fusion device for hemivertebra deformity, the purpose of which is to avoid the resection of the hemicone and make the anterior column of the spine form a support , so that the load-bearing position is more reasonable, while reducing the number of operations, avoiding multiple surgical traumas, reducing surgical risks, reducing surgical trauma and growth rod breakage

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