Source: https://patents.google.com/patent/US20050043798A1/en
Timestamp: 2019-05-21 09:11:00
Document Index: 450233669

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'art 13', 'art 11', 'art 93', 'art 91', 'art.\n10']

US20050043798A1 - Intervertebral disk prosthesis methods of use - Google Patents
Intervertebral disk prosthesis methods of use Download PDF
US20050043798A1
US20050043798A1 US10/951,317 US95131704A US2005043798A1 US 20050043798 A1 US20050043798 A1 US 20050043798A1 US 95131704 A US95131704 A US 95131704A US 2005043798 A1 US2005043798 A1 US 2005043798A1
US10/951,317
US7740658B2 (en
2003-01-16 Priority to US10/345,634 priority patent/US7011684B2/en
2004-09-27 Priority to US10/951,317 priority patent/US7740658B2/en
2004-09-27 Application filed by Concept Matrix LLC filed Critical Concept Matrix LLC
2005-02-24 Publication of US20050043798A1 publication Critical patent/US20050043798A1/en
2010-06-22 Publication of US7740658B2 publication Critical patent/US7740658B2/en
An intervertebral disk prosthesis includes a first part, and the first part has a top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the first part from the opening and defined by the inner surface. The outer surface proximate the top contacts a concave portion of a first vertebra. The disk prosthesis further includes a second part including a top, a bottom, and an outer surface. The outer surface proximate the bottom contacts a concave portion of a second vertebra, and the outer surface of the second part proximate the top of the second part cooperatively engages the inner surface of the first part thereby allowing at least two-degrees of freedom of movement.
This application is a divisional of co-pending U.S. patent application Ser. No. 10/345,634 filed Jan. 16, 2003 entitled “INTERVERTEBRAL DISK PROSTHESIS.” This application claims the benefit of U.S. Provisional Patent Application No. 60/349,743, filed Jan. 17, 2002 and U.S. Provisional Patent Application No. 60/369,667, filed Apr. 2, 2002.
The present invention relates to an apparatus for intervertebral disk replacement and more particularly to an intervertebral disk prosthesis capable of being implanted in a patient utilizing minimally invasive surgical techniques.
A relatively new concept (within the past two decades) is intervertebral total disk replacement or nucleus pulposus (nuclear) replacement. Nuclear replacements are generally designed with either a water retaining chemical in a compartment (bag-like container) or with various woven fiber or pad configurations using synthetic materials as a support cushion. In concept, nuclear replacements have significant potential because the annulus and the endplates are substantially preserved, so long as they were not damaged by previous trauma. However, to date, the available nuclear replacements lack the strength of a human disk nucleus pulposus matter and/or the damage to the annulus during implantation may allow extrusion of the nuclear replacement not unlike a disk hemiation.
Briefly stated, the present invention comprises an intervertebral disk prosthesis. The disk prosthesis includes a first part having a top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the first part from the opening and defined by the inner surface. The outer surface proximate the top contacts a concave portion of a first vertebra. The disk prosthesis further includes a second part including a top, a bottom, and an outer surface. The outer surface proximate the bottom contacts a concave portion of a second vertebra, and the outer surface of the second part proximate the top of the second part cooperatively engages the inner surface of the first part thereby allowing at least two-degrees of freedom of movement.
Together, the outer surface 13 a of the cap 13 and a portion 11 b of the outer surface 11 a of the base 11 that is not covered by the cap 13 comprise an outer prosthesis surface 12 that is substantially smooth over the entire surface. The structure of the prosthesis 10 is preferably a blo-compatible metal, a bio-compatible alloy or a bio-compatible ceramic. However, the structure may be titanium, stainless steel, alloys such as a cobalt-chrome molybdenum alloy, polymeric materials, composites, and the like without departing from the broad inventive scope of the present invention.
FIG. 6A shows a side sectional view of a second preferred embodiment of a disk prosthesis 60 in accordance with the present invention. The disk prosthesis 60 has a distal end 60 a, a proximal end 60 b, a lower wall 60 c, an upper wall 60 d, a first sidewall 60 e (FIGS. 7A-7C), and a second sidewall (not shown). The disk prosthesis includes a first part or a cap 63. The cap 63 includes a top 63 d, a bottom 63 c having an opening 63 f, an outer surface 63 a, an inner surface 63 b and a socket 63 e extending into an interior of the cap 63 from the opening and defined by the inner surface 63 b. The outer surface 63 a proximate the top 63 d contacts a concave portion 100 b of a first vertebra 100. The disk prosthesis 60 further includes a second part or a base 61 including a top 61 d, a bottom 61 c, and an outer surface 61 a. The outer surface 61 a proximate the bottom 61 c contacts a concave portion 100 a of a second vertebra 100, and the outer surface 61 a of the base 61 proximate the top 61 d of the base 61 cooperatively engages the inner surface 63 b of the cap 63 thereby allowing at least two-degrees of freedom of movement.
The insertion tool 220 further includes a driving member 226 that is configured to engage the body of the disk prosthesis 10. The driving member 226 is configured to be impacted such that during insertion a surgeon may tap or hammer the driving member 226 to push the disk prosthesis 10 through a small opening. Preferably, the first and second fingers 222, 224 are retractable relative to the driving member 226. Thus, after the disk prosthesis 10 is inserted to a desired position, the first and second fingers 222, 224 are retracted while the driving member 226 holds the disk prosthesis 10 in place. Optionally, the disk prosthesis 10 may have grooves 166 (shown in phantom in FIG. 15B) extending from the upper and lower openings 16 a, 16 b to facilitate the removal of the retractable fingers 222, 224. Optionally, the insertion tool 220 includes third and fourth fingers 228 (shown in phantom in FIG. 15A-15B) configured to retractably move along the space between the upper part 13 and the lower part 11 of the body of the disk prosthesis 10.
FIGS. 16A-16B is a side elevational view of a fifth insertion tool 230 for a disk prosthesis 90 (190, 290 or 390) having upper and lower openings 96 a, 96 b and upper and lower arches 150, 152. For example, the upper finger 232 has first and second prongs 232 a, 232 b for straddling the upper arches 150 as best seen in FIG. 16B. The insertion tool 230 is similar to the insertion tool 220, but each of the retractable fingers 232, 234 is forked to accommodate the arches 150, 152. Preferably, the arches 150, 152 and the rows of cones 153 are just below the outer surface of the fingers 232, 234, so that the arches 150, 152 do not injure adjacent tissue during insertion. Optionally, the insertion tool 230 includes third and fourth fingers 238 (shown in phantom in FIG. 16A-16B) configured to retractably move between the space between the upper part 93 and the lower part 91 of the body of the disk prosthesis 90. Furthermore, it would be obvious to one skilled in the art to utilize multiple prongs in each of the retractable fingers 232, 234 in order to accommodate multiple arches 150, 152 (such as on disk prostheses 190 and 290) and multiple rows of sharpened cones 153 (such as on disk prosthesis 390).
1. A method of using an intervertebral disk prosthesis, the method including:
a) ensuring the intervertebral space between the first and second vertebrae of a patient is substantially free of nuclear matter;
b) inserting a distal end of the disk prosthesis into a small gap between the first and second vertebrae, the disk prosthesis including an upper part with a convexly-shaped and rounded top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the upper part from the opening and a lower part including a top, a convexly-shaped and rounded bottom, and an outer surface, the outer surface of the lower part proximate the top of the lower part being cooperatively and movably overlapped by the inner surface of the upper part thereby allowing at least two-degrees of freedom of movement; and
c) permitting the top of the upper part to contact the first vertebra and the bottom of the lower part to contact the second vertebra.
2. A method of installing an intervertebral disk prosthesis using a working tube and a surgical instrument, the method comprising:
b) inserting through the incision a distal end of the working tube;
e) inserting the intervertebral disk prosthesis through the small gap into and within a nuclear region of the intervertebral space between the first and second vertebrae, the intervertebral disk prosthesis including an upper part with a convexly-shaped and rounded top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the upper part from the opening and a lower part including a top, a convexly-shaped and rounded bottom and an outer surface, the outer surface of the lower part proximate the top of the lower part being cooperatively and movably overlapped by the inner surface of the upper part thereby allowing at least two-degrees of freedom of movement.
3. The method of claim 2, wherein the intervertebral disk prosthesis is inserted using an insertion tool that has a first finger configured to engage an ingrowth opening in the top of the upper part, a second finger configured to engage an ingrowth opening in the bottom of the lower part, and a driving member disposed between the first and second fingers.
4. The method of claim 2, wherein the intervertebral disk prosthesis further comprises a proximal end and a distal end, both the proximal and distal ends of the intervertebral disk prosthesis are generally bluntly rounded and the distal end has a lesser average radius of curvature than the proximal end.
5. The method of claim 2, wherein the intervertebral disk prosthesis further comprises a proximal end and a distal end, and the length of the intervertebral disk prosthesis as measured from the distal end to the proximal end is between about 10 mm and about 30 mm.
6. The method of claim 2, wherein the intervertebral disk prosthesis further comprises an anterior side and a posterior side, and the width of the intervertebral disk prosthesis as measured between the anterior and posterior sides is between about 10 mm and about 25 mm.
7. The method of claim 2, wherein the height of the intervertebral disk prosthesis as measured between the top of the upper part and the bottom of the lower part is between about 5 mm and about 25 mm.
8. The method of claim 2, wherein the incision is between about 10 mm and about 100 mm in span.
9. The method of claim 2, wherein the intervertebral disk prosthesis further comprises an anterior side and a posterior side, the length of the intervertebral disk prosthesis as measured from the distal end to the proximal end being greater than the width of the intervertebral disk prosthesis as measured between the anterior and posterior sides and being greater than the height of the intervertebral disk prosthesis as measured between the top of the upper part and the bottom of the lower part.
10. The method of claim 2, wherein step (d) further comprises removing a portion of bone matter from the first and second vertebrae.
12. A method of installing an intervertebral disk prosthesis in outpatient surgery using a working tube and a surgical instrument, the method comprising:
US10/951,317 2002-01-17 2004-09-27 Intervertebral disk prosthesis methods of use Active 2025-12-23 US7740658B2 (en)
US10/345,634 US7011684B2 (en) 2002-01-17 2003-01-16 Intervertebral disk prosthesis
US10/951,317 US7740658B2 (en) 2002-01-17 2004-09-27 Intervertebral disk prosthesis methods of use
US10/345,634 Division US7011684B2 (en) 2002-01-17 2003-01-16 Intervertebral disk prosthesis
US20050043798A1 true US20050043798A1 (en) 2005-02-24
US7740658B2 US7740658B2 (en) 2010-06-22
US10/345,634 Active US7011684B2 (en) 2002-01-17 2003-01-16 Intervertebral disk prosthesis
US10/951,317 Active 2025-12-23 US7740658B2 (en) 2002-01-17 2004-09-27 Intervertebral disk prosthesis methods of use
US11/370,537 Abandoned US20060155378A1 (en) 2002-01-17 2006-03-08 Intervertebral disk prosthesis
USD371178S (en) * 1994-11-01 1996-06-25 Throwing toy
USD450123S1 (en) * 2000-07-12 2001-11-06 Cannon Rubber Limited Breast shell
USD483822S1 (en) * 2002-07-23 2003-12-16 Hedstrom Corporation Football
AU1830999A (en) 1997-12-19 1999-07-12 Ericsson Inc. System and method for allowing distinctive alerting
US7740658B2 (en) 2002-01-17 2010-06-22 Concept Matrix, Llc Intervertebral disk prosthesis methods of use
DE60335519D1 (en) 2011-02-10
US20050096746A1 (en) 2005-05-05 Instrumentation and associated methods for joint prosthesis implantation