Dynamized interspinal implant

• US 9,662,149 B2
• Filed: 05/08/2016
• Issued: 05/30/2017
• Est. Priority Date: 03/06/2004
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: DiNello, Alexander Michel, Serhan, Hassan, Christianson, William
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): Comstock, David C
• Application Number:
  US15/149,132
• Publication Number:
  US 20160249960A1
• Time in Patent Office: 387 Days
• Field of Search: 606246-249, 606279, 623 1711, 623 1713, 623 1715, 623 1716
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61B 17/7065 Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor
• CPC Class Codes: A61B 17/7068 Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor
• CPC Class Codes: A61B 2017/00075 Motion
• CPC Class Codes: A61B 2017/00221 with wireless transmission of data, e.g. by infrared radiation or radiowaves
• CPC Class Codes: A61B 2017/00964 composite
• CPC Class Codes: A61B 2017/567 Joint mechanisms or joint supports in addition to the natural joints and outside the joint gaps
• CPC Class Codes: A61B 2017/681 Alignment, compression, or distraction mechanisms
• CPC Class Codes: A61F 2/4405 for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes devices implanted between spinous or transverse processes A61B17/7062
• CPC Class Codes: A61F 2/482 Electrical means

Abstract

An interspinous process having a narrowed distal portion.

Claims

1. An implant, comprising:

a) a body portion having a first end, a second end, an upper portion having an upper surface adapted to bear upon an upper vertebra, and a lower portion having a lower surface adapted to bear upon a lower vertebra, wherein the body portion tapers substantially continuously posteriorly from the first end to the second end,

b) a flange extending vertically from the lower portion,

c) a screw extending into the flange, the screw having a longitudinal axis and a head portion, and

d) a spring contacting the head portion of the screw, the spring having a longitudinal axis, wherein the longitudinal axis of the screw is substantially parallel to the longitudinal axis of the spring.

2. The implant of claim 1, wherein an end portion of the flange comprises a cup having a substantially annular sidewall.

3. The implant of claim 2, wherein the spring sits freely in and bears against the cup.

4. The implant of claim 1, wherein the body portion is monolithic.

5. The implant of claim 1, wherein a thickness of the body portion is greater at the first end than at the second end.

6. An implant, comprising:

a) a body portion having a first end, a second end, an upper portion having an upper surface adapted to bear upon an upper vertebra, and a lower portion having a lower surface adapted to bear upon a lower vertebra, wherein the body portion tapers from the first end to the second end,

b) a flange extending vertically from the upper or lower portion,

c) a screw extending into the flange, and

d) a spring contacting the screw, the spring being configured to expand and contract in a direction that is substantially perpendicular to an anterior-posterior axis extending between the first and second ends of the implant.

7. The implant of claim 6, wherein the spring is configured to expand and contract in a direction that is substantially parallel to a height direction between the upper and lower surfaces of the implant.

8. The implant of claim 6, wherein an end portion of the flange comprises a cup having a substantially annular sidewall.

9. The implant of claim 8, wherein the spring sits freely in and bears against the cup.

10. The implant of claim 6, wherein the flange extends from the lower portion.

11. The implant of claim 6, wherein the body portion is monolithic.

12. The implant of claim 6, wherein a thickness of the body portion is greater at the first end than at the second end.

13. A method of treating a spinal condition, comprising:

implanting between adjacent vertebra an implant comprising;

a) a body portion having an anterior end, a posterior end, an upper portion having an upper surface adapted to bear upon an upper vertebra and a lower portion having a lower surface adapted to bear upon a lower vertebra,

b) a flange extending substantially vertically from the lower portion,

c) a screw extending into the flange, and

d) a spring contacting a head portion of the screw,

wherein the implant is implanted in an orientation whereby the body portion tapers towards the spinal cord.

14. The method of claim 13, wherein the implant is implanted such that the spring substantially lies in a sagittal plane of the patient.

15. The method of claim 13, wherein the spring is configured to expand and contract in a sagittal plane of the patient.

16. The method of claim 13, wherein the body portion is monolithic.

17. The method of claim 13, wherein a thickness of the body portion is greater at the anterior end than at the posterior end.