Surgical saw blade for wedge osteotomies

• US 8,939,981 B1
• Filed: 03/26/2010
• Issued: 01/27/2015
• Est. Priority Date: 03/30/2009
• Status: Active Grant

• Current Assignee: Cortical Edge Orthopedics, LLC
• Original Assignee: Keith Richard Anderson
• Inventors: Anderson, Keith Richard
• Primary Examiner(s): Lawson, Matthew
• Assistant Examiner(s): LEE, SI M
• Application Number:
  US12/732,398
• Time in Patent Office: 1,768 Days
• Field of Search: 606/79, 606/82, 606/84, 606/85, 606/80, 606/86.R, 606/105.5, 301/67, 303/53, 303/56, 305/035, 305/03, 305/01, 838/35, 838/48
• US Class Current: 606/82
• CPC Class Codes: A61B 17/14 Surgical saws A61B17/1637 takes precedence; tooth saws A61C3/12 ; Accessories therefor
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades

Abstract

A surgical blade for performing a wedge osteotomy, the blade including a body portion, having a cutting tip on a first end for initially cutting into the bone; a cutting slope comprising multiple rows of cutting teeth at multiple planes to resect bone as it enters, leaving a wedge osteotomy; a shaft of a predetermined length and width for supporting the cutting slope; and a saw attachment base on a second end of the blade for engaging a base of a saw to cause the blade to oscillate and perform the wedge osteotomy.

Claims

1. A surgical blade for use with a saw for performing a one pass wedge osteotomy, comprising:

a. a blade body having proximal and distal ends, wherein the distal end has a horizontal width narrower than a horizontal width of the proximal end;

b. a cutting edge on the distal end of the blade body for making initial contact with a bone, the cutting edge having a first plurality of distally extending cutting teeth, positioned along a radius;

c. a shaft having a slope descending from the proximal end to the cutting edge;

d. a plurality of offset planes positioned along the slope, each offset plane having an upper surface;

e. a plurality of rows of teeth positioned along an axis of the slope and positioned between the offset planes, each row of teeth having a horizontal width wherein a most proximal row of teeth has a widest horizontal width and the cutting edge has a narrowest horizontal width, and wherein along the slope a more proximal row of teeth is wider than a more distal row of teeth;

f. each row of teeth comprising multiple teeth with distally extending cutting tips, said teeth positioned along a radius, and wherein said rows of teeth enable multiple cuts in bone with one linear pass of the surgical blade for defining and resecting a predetermined, predictable wedge shape of bone and for avoiding planar inconsistencies or inaccuracies associated with resecting a wedge of bone with more than one pass of a blade;

g. a saw attachment base on the proximal end of the blade body for enabling attachment to an oscillating saw; and

h. wherein the shaft does not have teeth on four surfaces and accommodates the slope on a fifth surface, and the cutting edge on a sixth surface.

2. The surgical blade of claim 1, further comprising a neck portion intermediate the shaft and the saw attachment base.

3. The surgical blade of claim 1, wherein along the slope, a more proximal row of teeth is elevated above a more distal row of teeth.

4. The surgical blade of claim 1, wherein the blade is made from any material used for cutting bone that can be sterilized.

5. The surgical blade of claim 1, wherein the blade is made from surgical grade stainless steel.

6. The surgical blade of claim 1, wherein the teeth of each of the plurality of rows of teeth are connected.

7. A surgical blade for performing a linear, one-pass wedge osteotomy, comprising:

a. a blade body having first and second ends;

b. a first plurality of cutting teeth establishing a cutting point on a first end of the blade, the cutting point having a radius;

c. a shaft comprising a slope;

d. a plurality of offset planes positioned along the slope, each offset plane having an upper surface;

e. a plurality of rows of teeth positioned between the offset planes, each row having multiple teeth comprising cutting tips extending towards the cutting point, said teeth of each row being spaced along a radius;

f. wherein the shaft does not have teeth on four surfaces and accommodates the slope on a fifth surface, and the cutting point on a sixth surface; and

g. a saw attachment base on a second end of the blade for engaging a base of a saw to cause the blade to oscillate.

8. The surgical blade of claim 7, wherein the shaft comprises a rectangular or trapezoidal shape.

9. The surgical blade of claim 7, further comprising a neck portion intermediate the shaft and the saw attachment base.

10. The surgical blade of claim 7, wherein the blade enables a one pass complete wedge osteotomy or a one pass wedge osteotomy wherein a distal cortex of bone is left intact as a hinge.

11. The surgical blade of claim 7, wherein the blade is made from surgical grade stainless steel used for cutting bone that can be sterilized.

12. The surgical blade of claim 7, wherein the multiple teeth of each row are connected.

13. A surgical blade for performing a one-pass wedge osteotomy, the blade comprising:

a. a blade body, having proximal and distal ends, a horizontal width of the distal end being narrower than a horizontal width of the proximal end;

b. a cutting point on the distal end for initiating a first cut into selected bone tissue, wherein said cutting point comprises a first plurality of cutting teeth positioned along a radius;

c. a cutting slope on the blade body, the cutting slope comprising a plurality of rows of teeth, each row comprising teeth with cutting tips extending towards the distal end of the blade, the plurality of rows of teeth positioned in multiple offset planes along an axis of the slope, each row having a horizontal width, wherein along the slope a more proximal row of teeth is wider than a more distal row of teeth, and wherein each row enables resection of selected bone tissue with one pass of the blade leaving a wedge osteotomy;

d. a shaft for supporting the cutting slope; and

e. a saw attachment base on a second end of the blade for enabling connection to a saw.

14. A surgical blade for performing a one-pass wedge osteotomy, comprising:

a. a blade body having first and second ends;

b. a first plurality of cutting teeth establishing a cutting point on a first end of the blade body for initiating a cut in a bone, the cutting point having a radius;

c. a shaft having a cutting slope;

d. a plurality of offset planes positioned along the cutting slope, each offset plane having an upper surface; and

e. a plurality of rows of teeth positioned between the offset planes, each row of teeth having multiple teeth comprising cutting tips extending towards the cutting point and spaced along a radius.

15. The surgical blade of claim 14, wherein the shaft is rectangular.

16. The surgical blade of claim 14, wherein the shaft is trapezoidal, and wherein the second end of the blade is wider than the first end of the blade.

17. The surgical blade of claim 14, wherein the blade is made from any material used for cutting bone that can be sterilized.

18. The surgical blade of claim 14, wherein the blade is made from surgical grade stainless steel used for cutting bone that can be sterilized.

19. The surgical blade of claim 14 further comprising a saw attachment base.

20. The surgical blade of claim 14 wherein the blade enables a one pass complete wedge osteotomy or a one pass wedge osteotomy wherein a distal cortex of bone is left intact as a hinge.