Patent EP0948299B1 successfully refreshed from Google Patents.
EP0948299B1
Expired / Lapsed
EP
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Intervertebral prosthetic device
Assignee: Individual
•
Filing: 1997-11-06
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Granted: 2003-05-21
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Expires: 2017-11-06
Abstract
Abstract There is provided an intervertebral prosthetic device for replacement of an intervertebral disc. The device includes a first fixation member (14; 78) for fixation within a first vertebral body and a second fixation member for fixation within a second vertebral body adjacent the first vertebral body. The present prosthetic device also includes a compressible member (18; 82) for positioning between the first and second fixation members. The compressible member (18; 82) has an outer periphery less than or substantially equal to a diameter of a nucleus pulposus of the intervertebral disc. The compressible member (18; 82) thus essentially fits within the annulus fibrosis of the intervertebral disc. Moreover, the compressible member (18; 82) also has at least one spring that can be pre-loaded to place the annulus fibrosis under tension and to reproduce the mechanical properties of a natural disc. <IMAGE>
Inventors
- 👤 Glenn R. Buttermann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 12:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61B; A61B17/00; A61B17/02; A61B17/025; A61B2017/0256; A61F2/30721; A61F2/30749; A61F2/30767; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30138; A61F2002/30158; A61F2002/30199; A61F2002/30224; A61F2002/30225; A61F2002/3023; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30327; A61F2002/30329; A61F2002/30331; A61F2002/30354; A61F2002/30362; A61F2002/3037; A61F2002/30373; A61F2002/30433; A61F2002/30476; A61F2002/30492; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30546; A61F2002/3055; A61F2002/30563; A61F2002/30565; A61F2002/30566; A61F2002/30568; A61F2002/30573; A61F2002/30601; A61F2002/30604; A61F2002/30616; A61F2002/30667; A61F2002/30706; A61F2/30771; A61F2002/30878; A61F2002/30884; A61F2/46; A61F2002/4631; A61F2220/00; A61F2220/0008; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2230/0017; A61F2230/0026; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0004; A61F2250/0012; A61F2250/0014; A61F2250/0036; A61F2250/0039; A61F2250/0058; A61F2250/0082; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00239; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
122 words
An intervertebral prosthetic device for replacement of a nucleus
pulposus of an intervertebral disc, characterized by : a first intravertebral fixation member (14) for fixation within a cavity of a first vertebral
body (20) and having a first longitudinal axis and at least one adjustment element (24) that adjusts a
length dimension of said first fixation member (14) along said first longitudinal axis; a second intravertebral fixation member (16) for fixation within a cavity of a second
vertebral body (22) adjacent the first vertebral body (20); and a compressible member (18) positioned between said first fixation member (14) and said
second fixation member (16) and that remains compressible after implantation at the site of the
replaced nucleus pulposus of the intervertebral disc.
Claim 2
Dependent Claim
118 words
A prosthetic device according to claim 1, wherein the first fixation
member (14) has a bone-contacting surface (27) for positioning against subchondral bone of the first
vertebral body (20), wherein the second fixation member (16) has a bone-contacting surface (29) for
positioning against subchondral bone of the second vertebral body (22), and wherein the
compressible member (18) has a top plate (42) connected to said first fixation member (14), a
bottom plate (44) connected to said second fixation member (16), and at least one compressible
element (40) therebetween that remains compressible after implantation, said compressible member
(18) further having an outer periphery less than or substantially equal to a diameter of the nucleus
pulposus of the intervertebral disc.
Claim 3
Dependent Claim
37 words
A prosthetic device according to claim 1, wherein said first fixation
member (14) comprises a first support member (32) and a first adjustable member (28) that adjusts
along a longitudinal axis of said first adjustable member (28).
Claim 4
Dependent Claim
37 words
A prosthetic device according to claim 3, wherein said second
fixation member (16) comprises a second support member (34) and a second adjustable member
(30) that adjusts along a longitudinal axis of said second adjustable member (30).
Claim 5
Dependent Claim
54 words
A prosthetic device according to claim 4, wherein: said first adjustable member (28) includes said at least one adjustment element (24) that
adjusts a height of said first adjustable member (28), and said second adjustable member (30) includes at least one adjustment element (26) that
adjusts a height of said second adjustable member (30).
Claim 6
Dependent Claim
100 words
A prosthetic device according to claim 5, wherein: each of said first adjustable member (28) and said second adjustable member (30) has a first
plate (31) and a second plate (33), said at least one adjustment element (24) of said first adjustable member (28) comprises a
telescopic strut extending between said first plate (31) and said second plate (33) of said first
adjustable member (28), and said at least one adjustment element (26) of said second adjustable member (30) comprises a
telescopic strut extending between said first plate (31) and said second plate (33) of said second
adjustable member (30).
Claim 7
Dependent Claim
35 words
A prosthetic device according to claim 5, wherein said at least one
adjustment element (24) of said first adjustable member (28) has an exterior surface and a fin (66)
extending outward from said exterior surface.
Claim 8
Dependent Claim
18 words
A prosthetic device according to claim 1, wherein said compressible
member (18) comprises at least one spring (40).
Claim 9
Dependent Claim
15 words
A prosthetic device according to claim 2, wherein each said bone-contacting
surface (27,29) is porous.
Claim 10
Dependent Claim
60 words
A prosthetic device according to claim 1, wherein the first fixation
member (14) has an adjustable member (28) and a support member (32), said adjustable member
(28) having a bone-contacting portion and an other portion for positioning against said support
member (32), and wherein the compressible member (18) is dimensioned to operably replace the
nucleus pulposus of the intervertebral disc.
Claim 11
Dependent Claim
84 words
A prosthetic device according to claim 10, wherein said second
fixation member (16) has an adjustable member (30) and a support member (34), said adjustable
member (30) of said second fixation member (16) having a bone-contacting portion, an other
portion for positioning against said support member (34) of said second fixation member (16), and
at least one adjustment element (26) for adjusting a distance between said bone-contacting portion
of said second adjustable member (30) and said other portion of said second adjustable member
(30).
Claim 12
Dependent Claim
18 words
A prosthetic device according to claim 10, wherein said second
fixation member (16) comprises a support member (34).
Claim 13
Dependent Claim
30 words
A prosthetic device according to claim 10, wherein said device
enables at least four degrees of relative motion between the first vertebral body (20) and the second
vertebral body (22).
Claim 14
Dependent Claim
57 words
A prosthetic device according to claim 1, wherein said first fixation member (14)
comprises an adjustable member (28) and a support member (32), said adjustable member (28)
having a first bone-contacting plate (31) and a second plate (33), said at least one adjustment
element (24) extending between said first bone-contacting plate (31) and said second plate (33).
Claim 15
Dependent Claim
40 words
A prosthetic device according to claim 1, wherein said second fixation member (16)
has a second longitudinal axis and at least one adjustment element (26) that adjusts a height of said
second fixation member (16) along said second longitudinal axis.
Claim 16
Dependent Claim
38 words
A prosthetic device according to claim 15, wherein each said at least one adjustment
element (24) of said first fixation member (14) has an exterior surface and at least one fin (66)
extending outward from said exterior surface.
Claim 17
Dependent Claim
42 words
A prosthetic device according to claim 15, wherein each said at least one adjustment
element (24,26) of said first and second fixation members (14, 16) comprises a telescopic strut, and
wherein adjustment of each said telescopic strut pre-loads said compressible member (18).
Claim 18
Dependent Claim
81 words
A prosthetic device according to claim 14, wherein said second fixation member
(16) comprises an adjustable member (30) and a support member (34), said adjustable member (30)
of said second fixation member (16) having a first bone-contacting plate (31) and a second plate
(33), said at least one adjustment element (26) of said second fixation member (16) extending
between said first bone-contacting plate (31) of said second fixation member (16) and said second
plate (33) of said second fixation member (16).
Claim 19
Dependent Claim
20 words
A prosthetic device according to claim 18, wherein each said first bone-contacting
plate (31) has a concave, bone-contacting surface (27,29).
Claim 20
Dependent Claim
57 words
A prosthetic device (10) according to claim 18, wherein at least one of said first
support member (32) and said second support member (34) has a first surface (72) facing away from
said compressible member (18) and a second surface (74) facing toward said compressible member
(18), and said first surface and said second surface are oblique.
Claim 21
Dependent Claim
30 words
A prosthetic device according to claim 18, wherein at least one of said first support
member (32) and said second support member (34) has a circumference that varies in width.
Claim 22
Dependent Claim
46 words
A prosthetic device according to claim 1, wherein said first fixation member (14) has
a first support member (32) for placement between said at least one adjustment element (24) and
said compressible member (18), and said second fixation member (16) comprises a second support
member (34).
Claim 23
Dependent Claim
38 words
A prosthetic device according to claim 1, wherein said compressible member (18)
comprises a top plate (42), a bottom plate (44), and at least one compressible element extending
between said top plate (42) and said bottom plate (44).
Claim 24
Dependent Claim
71 words
A prosthetic device according to claim 23, wherein: said top plate (42) has a first surface (46) and a second surface (48), said first surface (46) of
said top plate (42) being connectable to said first fixation member (14), and said bottom plate (44) has a first surface (50) and a second surface (52), said first surface
(50) of said bottom plate (44) being connectable to said second fixation member (16).
Claim 25
Dependent Claim
20 words
A prosthetic device according to claim 23, wherein said at least one compressible
element comprises at least one spring (40).
Claim 26
Dependent Claim
24 words
A prosthetic device according to claim 25, wherein said at least one spring
comprises a coil spring (54) having a non-uniform cross-sectional diameter (56).
Claim 27
Dependent Claim
19 words
A prosthetic device according to claim 25, wherein said at least one spring (58) has a
non-uniform pitch (60).
Claim 28
Dependent Claim
35 words
A prosthetic device according to claim 25, wherein said at least one spring (62)
comprises a plurality of coils each having a cross-section, and at least two of said plurality of coils
have different cross-sections.
Claim 29
Dependent Claim
128 words
A prosthetic device according to claim 18, wherein: said at least one adjustment element (24) of said first fixation member (14) comprises a
plurality of adjustment elements, said plurality of adjustment elements extending between said first
bone-contacting plate (31) of said first fixation member (14) and said second plate (33) of said first
fixation member (14), said plurality of adjustment elements being spaced equidistant from each
other, and wherein said at least one adjustment element (26) of said second fixation member (16)
comprises a plurality of adjustment elements, said plurality of adjustment elements extending
between said first bone-contacting plate (31) of said second fixation member (16) and said second
plate (33) of said second fixation member (16), said plurality of adjustment elements being space
equidistant from each other.
Claim 30
Dependent Claim
18 words
A prosthetic device according to claim 29, wherein each of said plurality of
adjustment elements is independently adjustable.
Claim 31
Dependent Claim
52 words
A prosthetic device according to claim 1, wherein said compressible member (18)
has a longitudinal axis and an outer periphery in a plane transverse to said longitudinal axis, a
largest dimension of said outer periphery being less than or substantially equal to a diameter of a
nucleus pulposus of an intervertebral disc.
Claim 32
Dependent Claim
51 words
A prosthetic device according to claim 23, wherein said compressible member (18)
has a longitudinal axis and an outer periphery in a plane transverse to said longitudinal axis, said
outer periphery comprising a larger one of said periphery around said top plate (42) and said
periphery of said bottom plate (44).
Claim 33
Dependent Claim
44 words
A prosthetic device according to claim 1, wherein said compressible member (18)
has a longitudinal axis and an outer periphery in a plane transverse to said longitudinal axis, a
largest dimension of said outer periphery being less than or substantially equal to 3.0 cm.
Claim 34
Dependent Claim
28 words
A prosthetic device according to claim 33, wherein said compressible member (18)
comprises a plurality of springs (40) and said outer periphery circumscribes said plurality of springs
(40).
Claim 35
Dependent Claim
24 words
A prosthetic device according to claim 1, wherein said first fixation member (14)
and said second fixation member (16) each have a porous portion.
Claim 36
Dependent Claim
16 words
A prosthetic device according to claim 1, wherein said prosthetic device comprises a
biocompatible metallic material.
Claim 37
Dependent Claim
23 words
A prosthetic device according to claim 36, wherein said metallic material comprises
at least one of a titanium alloy and a cobalt-chromium alloy.
Claim 38
Dependent Claim
24 words
A prosthetic device according to claim 18, wherein each said adjustable member
(28,30) and each said support member (32, 34) comprises a ceramic material.
Claim 39
Dependent Claim
22 words
A prosthetic according to claim 38, wherein said ceramic material is at least one of an
aluminum oxide and a zirconium oxide.
Claim 40
Dependent Claim
28 words
A prosthetic device according to claim 1, wherein said compressible member (18)
has a height of approximately 1.5 cm and a diameter of approximately 2.0 to 3.0 cm.
Claim 41
Dependent Claim
128 words
A prosthetic device according to claim 1, wherein: said first fixation member (14) has a first portion (31) for positioning against subchondral
bone within a cavity of a first vertebral body (20) and a second portion (33) opposite said first
portion (31), said at least one adjustment element (24) comprises a telescopic element extending between
said first portion (31) and said second portion (33) to adjust a length dimension of said first fixation
member (24), said second fixation member (16) has a bone-contacting portion (31) for positioning against
subchondral bone of a second vertebral body (22) that is adjacent the first vertebral body (20), and said compressible member (18) is positioned between said second portion (33) of said first
fixation member (14) and said second fixation member (16).
Claim 42
Dependent Claim
48 words
A prosthetic device according to claim 1, wherein said first fixation member (14) has
a first longitudinal axis, and said at least one adjustment element (24) comprises at least one
telescopic element that adjusts a length dimension of said first fixation member (14) along said first
longitudinal axis.
References Cited (Backward Citations)
No citation records indexed.
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