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
CN106714737AInactive Publication Date: 2017-05-24FACET LINK
14 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
FACET LINK
Publication Date
2017-05-24
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More