Surgical instrument and method
A surgical instrument comprises a proximal end including a tool engagement surface. A distal end is configured to form a bore in vertebral tissue. The distal end includes a first thread, a second thread spaced from the first thread and at least one tissue depth indicia. Systems and methods are disclosed.
1. A surgical instrument comprising:
a proximal end including a tool engagement surface; and
a distal end configured to form a threaded bore in vertebral tissue to receive an implant that is separate from the surgical instrument, the distal end including a first thread, a second thread spaced from the first thread and at least one tissue depth indicia, the first thread having a maximum length that is greater than a maximum length of the second thread, the distal end comprising a tapered tip, the second thread being positioned between the first thread and the tip, the first thread having a major diameter that is equal to a major diameter of the second thread, the first thread including a first lead and the second thread including a second lead, the leads being different.
2. A surgical instrument as recited in claim 1 , wherein the first thread includes a first tissue depth indicia and the second thread includes a second tissue depth indicia.
3. A surgical instrument as recited in claim 1 , wherein the first thread comprises a distal thread and the at least one tissue depth indicia includes a tissue depth indicator disposed adjacent a proximal most end of the distal thread.
4. A surgical instrument as recited in claim 1 , wherein the first thread comprises a proximal thread and the at least one tissue depth indicia includes a tissue depth indicator disposed adjacent a distal most end of the proximal thread.
5. A surgical instrument as recited in claim 1 , wherein the at least one tissue depth indicia includes an undercut of at least one of the threads.
6. A surgical instrument as recited in claim 1 , wherein the at least one tissue depth indicia includes a plurality of undercuts of the threads.
7. A surgical instrument as recited in claim 1 , further comprising an intermediate portion disposed between the ends.
8. A surgical instrument as recited in claim 7 , wherein the intermediate portion comprises a non-threaded surface.
9. A surgical instrument as recited in claim 7 , wherein the intermediate portion comprises an even surface.
10. A surgical instrument as recited in claim 7 , wherein the at least one tissue depth indicia comprises a tissue depth indicator disposed adjacent a proximal most end of the intermediate portion and a tissue depth indicator disposed adjacent a distal most end of the intermediate portion.
11. A surgical instrument as recited in claim 1 , wherein the at least one tissue depth indicia comprises a 10 mm tissue depth indicator and a 14 mm tissue depth indicator.
12. A surgical instrument as recited in claim 1 , wherein the at least one tissue depth indicia comprises visual indicia.
13. A surgical instrument as recited in claim 1 , wherein the at least one tissue depth indicia comprises tactile indicia.
14. A surgical instrument as recited in claim 1 , wherein the tip is a self-tapping tip.
15. A surgical instrument as recited in claim 1 , wherein the tip is a blunt tip.
16. A surgical instrument as recited in claim 1 , wherein the tool engagement surface is connected to a powered actuator.
17. A surgical instrument comprising:
a proximal end including a tool engagement surface; and
a distal end configured to form a bore in vertebral tissue to receive an implant that is separate from the surgical instrument, the distal end including a proximal thread, a distal thread and an intermediate portion having an even surface disposed therebetween, the proximal thread having a maximum length that is greater than a maximum length of the distal thread, the distal end comprising a tapered tip, the distal thread being positioned between the proximal thread and the tip, the proximal thread having a major diameter that is equal to a major diameter of the distal thread, the proximal thread including a first lead and the distal thread including a second lead, the leads being different;
a first tissue depth indicator disposed adjacent a distal most end of the proximal thread; and
a second tissue depth indicator disposed adjacent a proximal most end of the distal thread.
18. A surgical system comprising:
a surgical instrument comprising a proximal end including an engagement surface, and a distal end configured to form a bore in vertebral tissue, the distal end including a first thread, a second thread spaced from the first thread and at least one tissue depth indicia, the first thread having a maximum length that is greater than a maximum length of the second thread, the distal end comprising a tapered tip, the second thread being positioned between the first thread and the tip, the first thread having a major diameter that is equal to a major diameter of the second thread, the first thread including a first lead and the second thread including a second lead, the leads being different;
an actuator connected with the engagement surface; and
a spinal implant configured for disposal with the bore.