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Intervertebral cage which is expandable in steps and implantation instrument therefor

A technology of vertebrae and instruments, applied in the field of implanted instruments used for them, can solve the problems of unrealistic and insufficient support function, and achieve the effect of preventing accidental reset

Inactive Publication Date: 2017-05-24
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an inherent disadvantage of its small size is that the support function is limited and often insufficient due to the small size
Larger embodiments of the cage, while improving support, are impractical due to minimally invasive surgical limitations

Method used

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  • Intervertebral cage which is expandable in steps and implantation instrument therefor
  • Intervertebral cage which is expandable in steps and implantation instrument therefor
  • Intervertebral cage which is expandable in steps and implantation instrument therefor

Examples

Experimental program
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Embodiment Construction

[0066] The intervertebral syndesmosis implant, designated in its entirety by the reference numeral 1, is intended for implantation in the intervertebral space 91 between two directly adjacent vertebral bodies 9, 9'. In the case of a physiologically intact spine, intervertebral discs 90 are present in the intervertebral spaces between the vertebrae. It can degenerate due to disease or strain such that at least part of it must be resected. In order to achieve adequate support of the intervertebral space 91 despite the loss of intervertebral disc material and thus prevent collapse of the spine, the intervertebral syndesmosis implant 1 is inserted into the intervertebral space 91 . It acts supportively and thus facilitates the union of two adjacent vertebrae 9,9' in the natural way through bone growth.

[0067] The intervertebral syndesmosis implant 1 comprises a base part 2 which is placed on the upper end plate 92 of the lower adjacent vertebra 9 . In addition, it includes the...

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Abstract

The invention relates to an intervertebral fusion implant for fusing two adjacent vertebrae (9, 9'), comprising a base piece (2) and a top piece (3) which in each case are designed to come to rest against a facing end plate (92) of one of the adjacent vertebrae (9, 9'), wherein the top piece (3) is vertically adjustable relative to the base piece (2), wherein a ratchet device (4), which effects a vertical adjustment in steps and secures a set height against reversion, is provided between the base piece (2) and the top piece (3). Thus a defined expansion can be achieved which is dependent upon the number of actuations. Precise control over the state of expansion is enabled in a purely haptic manner. Furthermore, implantation instruments are provided which are configured as parallel spreaders and have a stop as spreading path limiter or co-operating force and path measuring device. Thus it can be implanted more reliably, wherein the risk of overloading or injury to the vertebrae and the nerves and ligaments of the vertebrae is decreased.

Description

technical field [0001] The invention relates to a stepwise expandable intervertebral space cage with a base part and a cover part for bearing against the endplates of the respective upper and lower adjacent vertebral bodies and an implantation device therefor. Background technique [0002] Degeneration of the intervertebral discs in the spine due to strain or disease. Surgery is often indicated if conservative and / or physical therapy, as indicated, fails. For this purpose, it is known to insert removable or non-removable implants into the intervertebral space with degenerated intervertebral discs. The implant assumes the bearing role of the degenerated intervertebral disc and thus creates a secure support between adjacent vertebrae. Non-removable implants are also called "cages." [0003] Various surgical techniques are known for the implantation of cages. Traditional surgical techniques consist in an approach from the abdomen in order to avoid the risk of damage to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44
CPCA61F2/44A61F2/4455A61F2002/30172A61F2002/30309A61F2002/30331A61F2002/30515A61F2002/3052A61F2002/30556A61F2002/30593A61F2002/30733A61F2002/4628A61F2002/4658A61F2/447A61F2/4611A61F2002/30494A61F2002/30522A61F2002/4666A61F2002/4696A61F2002/30367A61F2/4637A61F2002/30477A61F2002/30579
Inventor K.德姆舍夫斯基
Owner FACET LINK
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