EP0968692A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Plate-cylinder vertebral prosthesis system
Assignee: Individual
•
Filing: 1999-06-23
•
Granted: —
•
Expires: 2019-06-23
Abstract
Abstract It is a telescopic cylinder(8,9)-plate (20) spinal prosthesis system for the replacement of one or more bodies of the spine, Lumbar, Thoracic or Cervical, including the disks, while it restores the height back to the normal in case of trauma injuries or other cause, and it secures and 'ties' in to four points with the upper and lower healthy body in to compression position, thus, preventing the substitute to be moved from its position due to shearing forces. This goal could be reached because it all acts, reacts and behaves as one solid unit. It also ensures cohesion and continuity of the graft which fills and bridges the gap between the healthy vertebral bodies so that the best conditions of its incorporation and secondary spine fusion will occur. Normally the high-grade stabilization it obtains may avoid the up until now need of a second posterior operation for the necessary additional stabilization with pedicular screws.
Inventors
- 👤 Christos Kalaitzis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 05:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/4465; A61B; A61B17/00; A61B17/02; A61B17/025; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7059; A61B17/80; A61B17/8061; A61B17/84; A61B17/86; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30125; A61F2002/30199; A61F2002/30224; A61F2002/30228; A61F2002/3023; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30354; A61F2002/30355; A61F2002/30362; A61F2002/3037; A61F2002/30373; A61F2002/30383; A61F2002/30403; A61F2002/30433; A61F2002/30476; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/3055; A61F2002/30593; A61F2002/30601; A61F2002/30604; A61F2002/30616; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30777; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30841; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0008; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
Spinal prosthesis made of Titanium alloy, which consists of telescopic expandable
cylinder consisting of parts 8, 9 and one slotted plate 20, that are interconnected
with two screws 6, this prosthesis is put in between and then stabilized in the gap
and empty space which occurs between two vertebral bodies after removal of one
or more vertebrae including the discs, to the desired and controlled height, and is
secured in position with two screws 3 that pass through opening-port 1 which also
allows filling of the cylinder with additional bone graft after its expansion.
Claim 2
Dependent Claim
139 words
Spinal prosthesis as described in claim 1, whose implantation fills the gap
through distraction which results from the cylinder's development, thus, distracting
the Spine to the desired height. It is also secured in the final position with a double
mechanism of screws 3-6, one on the nerve opposite to the opening 1 which is on
the surgeon's entry side, and the second one which fixes the plate 20 onto the
cylinder, while it is equipped with port 1 for filling with graft, which (port), gets
larger when the cylinder is developed allowing an easy and safe adding of additional
amount of graft that may be required. Finally, it interconnects the cylinder-plate
and upper and lower vertebral bodies creating a system of the same resistance and
behavior to the forces of load that tend to move and loosen the prosthesis.
Claim 3
Dependent Claim
71 words
Claim's 1 cylinder bears on its ends and from the surgeon's approach point threaded
holes 5 where the two screws 6 that pass through the plate's slot 12 are screwed in
order to secure the plate 20 into the compression place on the contact point with
the vertebral bodies. They are also the two out of four screws in total that secure
the cylinder in the place that we have chosen.
Claim 4
Dependent Claim
56 words
Claim's 1 plate (fig.6) comes in different lengths, so that after corporectomy takes
place, the cylinder's expansion covers the space between the healthy vertebrae. It
bears two holes 13 on its two ends, through which the spongiosa screws 7 are
screwed on the upper and lower vertebral bodies. Thus, the plate bridges the
healthy vertebral bodies.
Claim 5
Dependent Claim
37 words
Claim's 1 plate 20 bears a notch 10 for holding the distraction tool on its ends, in
order to manage compression of the cylinder's-body touching point. Its other side
attaches on the close side of opening 1.
Claim 6
Dependent Claim
51 words
Claim's 1 cylinders bear teeth on their edges, of 2,5mm height with an in-between
footing of a 3mm width that stops sinking and loss of height due to intrusion in the
upper and lower vertebral bodies. They also have a stabilizing effect against
shearing forces that tend to move the prosthesis.
Claim 7
Dependent Claim
59 words
Claim's 1 telescopic cylinder, consists of one cylinder of small diameter 8, which
moves inside the bigger one 9, sliding along three internal nerve guides 2-4. At the
nerve 4 which is opposite to the port 1, we pass and screw two screws 3 which
stabilize the cylinder at any length providing also compression to the adjacent
healthy vertebrae.
Claim 8
Dependent Claim
39 words
Claim's 1 telescopic cylinder, can be round or oval and its two edges may be of
trapezium or not shape, in order to fit with the anatomic needs that normally depend
on the level of the spine we operate.
Claim 9
Dependent Claim
33 words
Claim' s 1 telescopic cylinder must be available at such external diameters so that it
will fit the different diameters of every vertebra, from the small cervical ones to the
bigger lumbar ones.
Claim 10
Dependent Claim
36 words
Claim's 1 telescopic cylinder for replacement of small cervical vertebrae, has its
port 1 at its front part along with its threaded holes 5, for screwing plate 20 with
the two screws 6 through port 12.
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