US7608077B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for spinal distraction and fusion
Assignee: Mis IP Holdings LLC
•
Filing: 2005-07-26
•
Granted: 2009-10-27
•
Expires: 2025-07-26
Abstract
Abstract The invention provides an implantable spinal distraction/fusion rod with varied thread pitch and diameters along different portions of its length that it is capable of distracting two or more vertebral bodies relative to each other and/or facilitating the procedure of fusing the vertebral bodies together from within the spine. The present invention also provides for methods of using the rod to distract and/or fuse two or more vertebral bodies from within the spine.
Inventors
- 👤 Andrew H. Cragg
- 👤 Robert L. Assell
- 👤 Eugene A. Dickhudt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:59
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4611; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61B17/17; A61B17/1739; A61B17/1757; A61B17/32; A61B17/320016; A61B17/32002; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61F2/44; A61F2/441; A61F2/4455; A61F2/4465; A61F2/4601; A61B17/3205; A61B17/3207; A61B17/320725; A61B17/60; A61B17/66; A61B17/7055; A61B17/7061; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8811; A61B2017/00004; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B2017/00535; A61B2017/00557; A61B2017/00681; A61B2017/00734; A61B2017/00831; A61B2017/00867; A61B17/28; A61B17/29; A61B2017/2901; A61B2017/2905; A61B2017/320004; A61B2017/320012; A61B2017/320733; A61B2017/564; A61F2/30721; A61F2/30723; A61F2/442; A61F2/28; A61F2002/2817; A61F2002/2835; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30233; A61F2002/30235; A61F2002/30316; A61F2002/30535; A61F2002/30537; A61F2002/3055; A61F2002/30563; A61F2002/30593; A61F2002/30667; A61F2002/30677; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30784; A61F2002/3085; A61F2002/30859; A61F2002/30878; A61F2002/30879; A61F2002/448; A61F2210/00; A61F2210/0014; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00796; A61F2310/00976
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
257 words
An axially-extending implantable rod for adjusting a distance between two adjacent vertebral bodies in a spine, said rod comprising: an elongated body dimensioned for implantation along an axis extending from an access point on the anterior surface of the sacrum and for maintaining the distance between the two adjacent vertebral bodies; a first section near a leading end of the rod that has a first threading for engaging with a first vertebral body, the first threading comprising a first major diameter and a first minor diameter; a second section near a trailing end of the rod that has a second threading for engaging with a second vertebral body that is located inferiorly relative to the first vertebral body, the second threading comprising a second major diameter and a second minor diameter; an intermediate section extending between the distal and proximal sections, the intermediate section being sized and configured for maintaining the distance between the two vertebral bodies; a central lumen extending axially from the trailing end into the body; and at least one transverse aperture extending through the wall of the intermediate section and in communication with the lumen; wherein the first major diameter of the first threading is less than the second major diameter of the second threading; wherein a first thread pitch in the first section is finer relative to a second thread pitch in the second section such that advancement of the first section distally into the first vertebral body by rotation causes an increase in distance between the first and second vertebral bodies.
Claim 2
Dependent Claim
257 words
An axially-extending implantable rod for adjusting a distance between two adjacent vertebral bodies in a spine, said rod comprising: an elongated body dimensioned for implantation along an axis extending from an access point on the anterior surface of the sacrum and for maintaining the distance between the two adjacent vertebral bodies; a first section near a leading end of the rod that has a first threading for engaging with a first vertebral body, the first threading comprising a first major diameter and a first minor diameter; a second section near a trailing end of the rod that has a second threading for engaging with a second vertebral body that is located inferiorly relative to the first vertebral body, the second threading comprising a second major diameter and a second minor diameter; an intermediate section extending between the distal and proximal sections, the intermediate section being sized and configured for maintaining the distance between the two vertebral bodies; a central lumen extending axially from the trailing end into the body; and at least one transverse aperture extending through the wall of the intermediate section and in communication with the lumen; wherein the first major diameter of the first threading is less than the second major diameter of the second threading; wherein a first thread pitch in the first section is finer relative to a second thread pitch in the second section such that advancement of the first section distally into the first vertebral body by rotation causes an increase in distance between the first and second vertebral bodies.
Claim 3
Dependent Claim
46 words
The implantable rod according to claim 1 , wherein the rod includes a central lumen extending axially from the trailing end into the body, the at least one side aperture being in communication with the lumen and the body being substantially solid in the first section.
Claim 4
Dependent Claim
33 words
The implantable rod according to claim 1 , wherein a ratio of the axial length of the second threading to the second minor diameter is within the range of approximately 1.27 to 3.53.
Claim 5
Dependent Claim
43 words
The implantable rod according to claim 1 , wherein the first section further comprises a first minor diameter, and a ratio of the axial length of the first threading to the first minor diameter is within the range of approximately 2.12 to 5.29.
Claim 6
Dependent Claim
26 words
The implantable rod according to claim 1 , wherein the second major diameter is within the range of from about 10 mm to about 15 mm.
Claim 7
Dependent Claim
24 words
The implantable rod according to claim 1 , wherein the first major diameter is no greater than about 98% of the second major diameter.
Claim 8
Dependent Claim
27 words
The implantable rod according to claim 1 , wherein the elongated body has a length within the range of from about 1.25 inches to about 2.25 inches.
Claim 9
Dependent Claim
34 words
The implantable rod according to claim 1 , wherein each of the first threading and the second threading has an axial length within the range of from about 0.5 inches to about 1.25 inches.
Claim 10
Dependent Claim
28 words
The implantable rod according to claim 1 , wherein the intermediate section has an axial length within the range of from about 0.25 inches to about 0.5 inches.
Claim 11
Dependent Claim
15 words
The implantable rod according to claim 1 , wherein the elongated body comprises stainless steel.
Claim 12
Dependent Claim
14 words
The implantable rod according to claim 1 , wherein the elongated body comprises titanium.
Claim 13
Dependent Claim
16 words
The implantable rod according to claim 1 , wherein the elongated body comprises a bioabsorbable material.
Claim 14
Dependent Claim
28 words
The implantable rod according to claim 1 , wherein the elongated body comprises a lumen extending axially at least part way through the length of the elongated body.
Claim 15
Dependent Claim
24 words
The implantable rod according to claim 13 , wherein the elongated body further comprises a plurality of side apertures in connection with the lumen.
Claim 16
Dependent Claim
23 words
The implantable rod according to any preceding claim, wherein each of the first threading and the second threading extends counterclockwise around the body.
Claim 17
Dependent Claim
25 words
The implantable rod according to any of claim 1 , wherein each of the first threading and the second threading extends clockwise around the body.
Claim 18
Dependent Claim
21 words
The implantable rod according to claim 1 , wherein each of the first threading and the second threading are self tapping.
Claim 19
Dependent Claim
26 words
The implantable rod according to claim 1 , wherein the second major diameter is within the range of from about 12 mm to about 13 mm.
Claim 20
Dependent Claim
17 words
The implantable rod according to claim 1 , wherein the first major diameter is about 9 mm.
Claim 21
Dependent Claim
27 words
The implantable rod according to claim 1 , wherein the second thread pitch is within the range of from about 10 to about 15 turns per inch.
Claim 22
Dependent Claim
27 words
The implantable rod according to claim 1 , wherein the first thread pitch is within the range of from about 10 to about 20 turns per inch.
Claim 23
Dependent Claim
24 words
The implantable rod according to claim 1 , wherein the first thread pitch is at least about 105% finer than the second thread pitch.
Claim 24
Dependent Claim
24 words
The implantable rod according to claim 1 , wherein the first thread pitch is at least about 110% finer than the second thread pitch.
Claim 25
Dependent Claim
24 words
The implantable rod according to claim 1 , wherein the first thread pitch is at least about 125% finer than the second thread pitch.
Claim 26
Dependent Claim
20 words
The implantable rod according to claim 1 , further comprising a releasable coupling, for releasably engaging a rotatable driver tool.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2012-10-26 | 2013-04-27 | 2013-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2016-10-26 | 2017-04-27 | 2017-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2020-10-26 | 2021-04-27 | 2021-10-27 | $7700.00 | Window Closed / Lapsed |