Examples of 'disc nucleus' in a sentence
Meaning of "disc nucleus"
Disc nucleus: The gel-like material at the center of an intervertebral disc in the spine. It acts as a cushion and shock absorber between the vertebrae
How to use "disc nucleus" in a sentence
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disc nucleus
The annulus surrounds a prosthetic spinal disc nucleus.
The prosthetic disc nucleus is placed within the cavity.
The present invention relates to a prosthetic spinal disc nucleus.
Prosthetic spinal disc nucleus having a shape change characteristic.
The retainer selectively contains the prosthetic disc nucleus.
The packaged prosthetic disc nucleus includes a prosthetic disc nucleus and a retainer.
Another aspect of the present invention relates to a packaged prosthetic disc nucleus.
More particularly it relates to an artificial disc nucleus made of a hydrogel material.
A retainer is provided forming a cavity sized to selectively contain the prosthetic disc nucleus.
It is realized that not all human disc nucleus cavities are of the same size.
Very high pressures are present in use within the normal disc nucleus.
A method of implanting a prosthetic spinal disc nucleus into a nucleus cavity is also described.
Background of the Invention The present invention relates to a prosthetic disc nucleus.
The prosthetic spinal disc nucleus comprises a formed hydrogel core surrounded by a constraining jacket.
Manufacture of a preferred embodiment of the prosthetic spinal disc nucleus 20 is substantially as follows.
See also
The prosthetic spinal disc nucleus of claim 4, wherein the thread is comprised of a bioabsorbable material.
According to a preferred embodiment, the prosthetic spinal disc nucleus body is implanted in pairs.
The prosthetic spinal disc nucleus 20 and its retaining tube may be packaged in a dry foam.
In one specific embodiment of this invention, the device is a self-inflating prosthetic spinal disc nucleus.
This invention relates to a new prosthetic lumbar disc nucleus which is made from synthetic hydrogels.
The prosthetic disc nucleus 22 is then dehydrated, preferably under compression.
In one preferred embodiment, the combination retainer / prosthetic disc nucleus is placed within an outer enclosure.
The device of any of claims 1 to 8, which comprises a self-inflating prosthetic spinal disc nucleus.
The prosthetic spinal disc nucleus of Ray et al.
The anulus 64 does not provide any circumferential support to the prosthetic spinal disc nucleus 20.
A preferred method of implanting the intervertebral disc nucleus prosthesis 10 is substantially as follows.
The prosthetic disc nucleus 22 can assume a wide variety of forms, but includes a hydrogel core 26.
Further, it is preferred that the packaged prosthetic disc nucleus 70 be amenable to sterilization.
The prosthetic spinal disc nucleus 20 is comprised of a hydrogel core 22 and a constraining jacket 24.
FIGURE 3 is a top view of the artificial disc nucleus shown in Figure 1A ;.
The prosthetic spinal disc nucleus of claim 1, wherein the coupling means is a biocompatible thread ( 70 ).
In other words, in the dehydrated state, the prosthetic disc nucleus 22 fits within the cavity 50.
The prosthetic spinal disc nucleus 82 includes a first prosthetic body 83 and a second prosthetic body 84.
One preferred embodiment of a prosthetic spinal disc nucleus 20 is shown in FIG . 1.
The preferred prosthetic spinal disc nucleus 20 is 25 millimeters in length and 10 millimeters in outer diameter.
For example, an alternative embodiment packaged prosthetic disc nucleus 70 is shown in FIG . 7.
An intervertebral disc nucleus pulposus implant, comprising,.
FIGS . 4-6 illustrate steps of fabricating the prosthetic spinal disc nucleus body of FIG . 1.
The packaged prosthetic disc nucleus of claim 1, further comprising,.
One example of the hydrated prosthetic spinal disc nucleus 20 is shown in FIG . 1D.
The intervertebral disc nucleus prosthesis 10 is shown in greater detail in FIGS . 2A and 2B.
For example, one alternative embodiment of a prosthetic spinal disc nucleus 70 is shown in FIGS . 2A and 2B.
Construction of the packaged prosthetic disc nucleus 20 begins with formation of the prosthetic disc nucleus 22.
Various components of the prosthetic spinal disc nucleus 20 are described in greater detail below.
The conditioning renders the prosthetic spinal disc nucleus body 10 to a partially flattened or oval shape.
One embodiment of an intervertebral disc nucleus prosthesis 10 is shown in FIGS.
Figure 1C illustrates another artificial disc nucleus 18 having a greater degree of deformity correction.
FIGURE 3 is a top view of the artificial disc nucleus of the disclosure shown in Figure 1A ;.
US 4 772 287 discloses a prosthetic spiral disc nucleus with a flexible restraining jacket and a flowable core.
One embodiment of an intervertebral disc nucleus prosthesis 10 is shown in FIGS . 1A and 1B.
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