Dynamized interspinal implant

• US 10,433,881 B2
• Filed: 10/19/2017
• Issued: 10/08/2019
• 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: Serhan, Hassan, DiNello, Alexander Michel, Christianson, William
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): Comstock, David C
• Application Number:
  US15/787,998
• Publication Number:
  US 20180036043A1
• Time in Patent Office: 719 Days
• Field of Search: 606246-249, 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. A surgical method, comprising:

inserting an intervertebral device between upper and lower vertebrae such that;

an upper surface of an upper portion of the device bears against the upper vertebra;

teeth extending from the upper portion of the device grip the upper vertebra;

a lower surface of a lower portion of the device bears against the lower vertebra;

teeth extending from the lower portion of the device grip the lower vertebra;

wherein the upper and lower portions of the device extend in a non-parallel manner in an anterior-posterior direction;

wherein the device includes a wall disposed between the upper and lower surfaces;

inserting an upper bone fastener through a hole formed in an upper extension of the device that extends above the upper surface, the bone fastener extending into a lateral-facing surface of the upper vertebra; and

inserting a lower bone fastener through a hole formed in a lower extension of the device that extends beneath the lower surface, the bone fastener extending into a lateral-facing surface of the lower vertebra.

2. The method of claim 1, wherein a height between a posterior end of the upper surface of the upper portion and a posterior end of the lower surface of the lower portion is adapted to change after the device is inserted.

3. The method of claim 1, wherein the device has a height that narrows in an anterior-posterior direction.

4. The method of claim 1, wherein a length of the device is at least twice a width of the device.

5. The method of claim 1, wherein a first dimension of the device selected from length and width in a plane transverse to the spinal axis is at least twice as great as a second dimension of the device selected from length and width in the plane transverse to the spinal axis.

6. The method of claim 1, wherein the length of the upper extension is less than the length of the upper portion.

7. The method of claim 1, wherein the thickness of the wall is greater than the thickness of the upper portion.

8. The method of claim 1, wherein a posterior edge of the upper extension and a posterior edge of the lower extension lie substantially in a common plane.

9. A surgical method, comprising:

inserting an intervertebral device between upper and lower vertebrae such that;

an upper surface of an upper portion of the device bears against the upper vertebra;

teeth extending from the upper portion of the device grip the upper vertebra;

a lower surface of a lower portion of the device bears against the lower vertebra;

teeth extending from the lower portion of the device grip the lower vertebra;

wherein the device includes a wall disposed between the upper and lower surfaces;

inserting an upper bone fastener through a hole formed in an upper extension of the device that extends above the upper surface, the bone fastener extending into a lateral-facing surface of the upper vertebra;

inserting a lower bone fastener through a hole formed in a lower extension of the device that extends beneath the lower surface, the bone fastener extending into a lateral-facing surface of the lower vertebra; and

after inserting the device, changing a height of the device defined between a posterior end of the upper surface of the upper portion and a posterior end of the lower surface of the lower portion.

10. The method of claim 9, wherein the upper and lower portions of the device extend in a non-parallel manner in a first direction.

11. The method of claim 10, wherein the lower bone fastener has a longitudinal axis extending substantially transversely from the first direction.

12. The method of claim 9, wherein a posterior edge of the upper extension and a posterior edge of the lower extension lie substantially in a common plane.