Surgical saw blade having at least one pair of opposed teeth shaped as right triangles

• US 7,901,424 B2
• Filed: 12/08/2008
• Issued: 03/08/2011
• Est. Priority Date: 05/30/1991
• Status: Active Grant

• Current Assignee: Synvasive Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Synvasive Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Fisher, Michael Gerard, Fletcher, Henry Hasbrouck
• Primary Examiner(s): Brown; Michael A.
• Application Number:
  US12/330,017
• Publication Number:
  US 20090093814A1
• Time in Patent Office: 820 Days
• Field of Search: 606/79, 606/82, 606/84, 606/167, 606/176, 606177-178, 606/180, 838/25, 838/45, 838/52
• US Class Current: 606/176
• 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
• CPC Class Codes: B23D 51/10 for hand-held or hand-operated devices
• CPC Class Codes: B23D 61/006 Oscillating saw blades
• CPC Class Codes: B23D 61/121 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
• CPC Class Codes: B27B 19/006 with oscillating saw blades; Hand saws with oscillating saw blades

Abstract

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided. The surgical saw blade may have a distal end having at least one pair of teeth configured to be adjacent to each other and each of the pair of teeth is configured as a right triangle each having a hypotenuse which is oriented at least one of towards and away from the centrally positioned long axis.

Claims

1. In combination, a surgical bone saw and a bone saw blade comprising:

a) an oscillatory or sagittal bone saw; and

b) a surgical saw blade having;

i) a proximal end configured to couple to a surgical bone saw;

ii) a distal end having at least one pair of teeth having tips for cutting bone which are configured to be adjacent to each other and to have one of the pair of teeth configured as a right triangle with a hypotenuse which is oriented at least one of towards and away from a centrally positioned axis extending between the proximal end and the distal end and the other of said pair of teeth configured as a right triangle with a hypotenuse which is oriented in a direction opposite to the hypotenuse of said one of the pair of teeth and wherein said distal end has extending from each of said pair of teeth at least one additional tooth for cutting bone which is substantially identically shaped as a right triangle including a hypotenuse and an angle opposite the hypotenuse with a hypotenuse which is oriented in the same direction as the adjacent tooth defining said pair of teeth and wherein the tips of all of the teeth are arrayed substantially on a tangent perpendicular to the centrally positioned axis and wherein the tips of the additional teeth are arrayed substantially on a tangent perpendicular to the centrally positioned long axis;

wherein each of the teeth are substantially identically shaped substantially as right triangles including a hypotenuse and an angle opposite the hypotenuse, wherein each hypotenuse is oriented at least one towards and away from the centrally positioned long axis, and wherein the tips are configured to be placed substantially on a tangent which is perpendicular to a radial line extending from the center line of the power tool cutting axis that bisects the arc of travel within which the blade travels and further wherein the surgical saw blade is coupled to the oscillatory or sagittal bone saw.

2. The surgical saw blade of claim 1 wherein said distal end has extending from each of said pair of teeth at least two additional teeth for cutting bone each of which are substantially identically shaped as a right triangle including a hypotenuse and an angle opposite the hypotenuse with the hypotenuse is oriented in the same direction as the hypotenuse of the adjacent tooth defining said pair of teeth and wherein the tips of all of the teeth are arrayed substantially on a tangent perpendicular to the centrally positioned long axis.

3. The surgical saw blade of claim 1 wherein said distal end has extending from each of said pair of teeth at least three additional teeth for cutting bone each of which are substantially identically shaped as a right triangle including a hypotenuse and an angle opposite the hypotenuse with the hypotenuse is oriented in the same direction as the hypotenuse of the adjacent tooth defining said pair of teeth and wherein the tips of all of the teeth are arrayed substantially on a tangent perpendicular to the centrally positioned long axis.

4. The surgical saw blade of claim 1 wherein said distal end has extending from each of said pair of teeth at least four additional teeth for cutting bone each of which are substantially identically shaped as a right triangle including a hypotenuse and an angle opposite the hypotenuse with the hypotenuse is oriented in the same direction as the hypotenuse of the adjacent tooth defining said pair of teeth and wherein the tips of all of the teeth are arrayed substantially on a tangent perpendicular to the centrally positioned long axis.

5. The surgical saw blade of claim 1 wherein said distal end has extending from each of said pair of teeth at least five additional teeth for cutting bone each of which are substantially identically shaped as a right triangle including a hypotenuse and an angle opposite the hypotenuse with the hypotenuse is oriented in the same direction as the hypotenuse of the adjacent tooth defining said pair of teeth and wherein the tips of all of the teeth are arrayed substantially on a tangent perpendicular to the centrally positioned long axis.

6. The combination of claim 1 wherein the one additional tooth is at least one tooth of a plurality of additional teeth having tips having a total number of additional teeth between at least two additional teeth and five additional teeth.