Instrumentation and method for implant insertion

• US 6,929,647 B2
• Filed: 02/21/2001
• Issued: 08/16/2005
• Est. Priority Date: 02/21/2001
• Status: Expired due to Fees

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Inventors: Cohen, Herb
• Primary Examiner(s): Bennett, Henry
• Assistant Examiner(s): Patel, Nihir
• Application Number:
  US09/789,902
• Publication Number:
  US 20020116006A1
• Time in Patent Office: 1,637 Days
• Field of Search: 606/99, 606/61, 606/79, 606/80, 606/96, 623/17.11, 623/11, 623/12, 623/13, 623/14, 623/15, 623/16, 623/17, 623/18, 623/19
• US Class Current: 606/99
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/1633 Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft A61B17/1644 takes precedence
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2050/0063 Bayonet coupling
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/036 abutting on tissue or skin
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 2090/3937 Visible markers
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30617 : Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/448 : comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2002/4627 : with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4649 : Bone graft or bone dowel harvest sites
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4687 : Mechanical guides for implantation instruments
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2250/0097 : Visible markings, e.g. indicia

Abstract

An implant insertion apparatus for guiding surgical instrumentation and facilitating insertion of surgical implants into an intervertebral space includes an adjustable element defining a longitudinal passageway dimensioned to guide the surgical instrumentation inserted through the longitudinal passageway. The adjustable element has an elongate body and an extended body that are movable relative to one another for varying the length of the adjustable element. The apparatus also includes an engaging element insertable into the intervertebral space between adjacent vertebrae. The engaging element is releasably secured to a distal end of the elongate body.

Claims

1. An implant insertion apparatus for guiding surgical instrumentation and facilitating insertion of surgical implants into an intervertebral space comprising:

an adjustable element having a proximal end and a distal end, the adjustable element defining a longitudinal passageway extending from the proximal end to the distal end that is dimensioned to guide the surgical instrumentation inserted through the longitudinal passageway, the adjustable element including an elongate body and an extended body that are movable relative to one another for varying the length of the adjustable element; and

an engaging element insertable into the intervertebral space between adjacent vertebrae, wherein the engaging element is releasably secured to the distal end of the elongate body.

2. The implant insertion apparatus according to claim 1 further including positioning members for setting relative positions of the extended body with respect to the elongate body to adjust the length of the adjustable element.

3. The implant insertion apparatus according to claim 2 wherein the positioning members includes at least one positioning groove in the adjustable element and a locking element to engage the positioning groove.

4. The implant insertion apparatus according to claim 1 wherein the engaging element includes a base having a proximal end and a distal end, and defining a longitudinal opening therethrough.

5. The implant insertion apparatus according to claim 4 wherein the engaging element further includes first and second spacer arms extending longitudinally from the distal end of the base, each spacer arm defining a first vertebra supporting surface to contact a first vertebra and a second vertebra supporting surface to contact a second vertebra.

6. The implant insertion apparatus according to claim 1 wherein the engaging element is releasably secured to the distal end of elongate body of the adjustable element by a bayonet-type connection.

7. The implant insertion apparatus according to claim 1 further including a handle mounted to the engaging element.

8. The implant insertion apparatus according to claim 1 further including a head mounted to a proximal end of the extended body of the adjustable element, the head having a greater cross-sectional dimension than the engaging element for receiving impact of a driving member for positioning the engaging element with respect to the adjacent vertebrae.

9. The implant insertion apparatus according to claim 8 wherein the head is longitudinally adjustably mounted to the adjustable element and includes an opening for receiving the surgical instrumentation.

18. The implant insertion apparatus as claimed in claim 4, wherein the elongate body includes a rim at the distal end thereof adapted to be coupled with the base of the engaging element.

19. The implant insertion apparatus as claimed in claim 1, further comprising:

the elongate body having proximal and distal rims and first and second extending portions that extend between the proximal and distal rims;

the extended body having proximal and distal rims and first and second supporting elements that extend between the proximal and distal rims of the extended body, wherein the diameter of the proximal and distal rims of the elongate body is less than the diameter of the proximal and distal rims of the extended body so that the elongate body slidably fits within the extended body.

20. The implant insertion apparatus as claimed in claim 1, wherein the elongate body defines a first diameter and the extended body defines a second diameter, the first diameter being less than the second diameter so that the elongate body may slidably fit within the extended body.

10. A method for performing a surgical procedure comprising the steps of:

providing an adjustable element having a proximal end and a distal end, the adjustable element defining a longitudinal passageway extending from the proximal end to the distal end for receiving surgical instrumentation, the adjustable element including an elongate body and an extended body that are movable relative to one another for varying the length of the adjustable element;

moving the elongate body relative to the extended body for adjusting the length of the adjustable element;

providing an engaging element adapted for insertion into an intervertebral space between adjacent vertebrae and releasably securing the engaging element to the distal end of the elongate body;

after releasably securing the engaging element to the distal end of the elongate body, inserting the engaging element into the intervertebral space for maintaining the adjacent vertebrae in predetermined spaced relation; and

introducing the surgical instrumentation within the longitudinal passageway of the adjustable element to perform a surgical procedure.

11. The method according to claim 10 wherein the step of introducing includes advancing a surgical drill through the longitudinal passageway of the adjustable element to drill a bore between the adjacent vertebrae whereby the depth of advancement of the drill is controlled by the length of the adjustable element.

12. The method according to claim 11 further including the step of releasing the engaging element from the adjustable element.

13. The method according to claim 12 wherein the engaging element has a longitudinal opening extending therethrough and wherein the step of introducing includes advancing a surgical implant through the longitudinal opening of the engaging element and into the bore between the adjacent vertebrae.

14. A method for performing a procedure for implantation of at least two implants in side-by-side relation, comprising the steps of:

providing first and second engaging elements insertable in side-by-side relation in an intervertebral space between adjacent vertebrae, each engaging element defining a longitudinal opening therethrough;

providing an elongate member defining a longitudinal passageway for receiving surgical instrumentation, wherein the length of the elongate member is variable;

securing the first engaging element to the elongate member;

positioning the first engaging element into the intervertebral space between the adjacent vertebrae;

releasing the elongate member from the first engaging element thereby leaving the first engaging element within the intervertebral space;

after releasing the elongate member from the first engaging element, securing the second engaging element to the elongate member;

positioning the second engaging element into the intervertebral space between the adjacent vertebrae wherein the first and second engaging elements are in a side-by-side relation to one another in the intervertebral space; and

performing the surgical procedure at the intervertebral space.

15. The method for performing a surgical procedure according to claim 14, wherein the method further includes the step of adjusting the length of the elongate member.

16. The method for performing a surgical procedure according to claim 14 further comprising the step of:

performing the surgical procedure at the intervertebral space when the first engaging member is secured to the elongate member.

17. The method for performing a surgical procedure according to claim 14 wherein the engaging element further includes a handle releasably mounted thereto, the method further comprising holding the handle mounted to the engaging element.