Double row keel cut saw blade
First Claim
Patent Images
1. A cutting saw for removing bone or cartilage to form a slot in bone or cartilage, comprising:
- a base having an oblong shape, a top surface and a bottom surface;
a first cutting saw blade and a second cutting saw blade, the first and second cutting saw blades extending from the bottom surface of the base and in a direction parallel to each other, wherein each of the first and second cutting saw blades is provided with a first plurality of teeth extending in a first direction and a second plurality of bent teeth extending in a second direction which is different from the first direction, the second plurality of bent teeth being bent at an inward angle towards an inner surface of a sidewall of each of the first and second cutting saw blades, and the second plurality of bent teeth of the first cutting saw blade being offset from the second plurality of bent teeth of the second cutting saw blade to create interlocking between the first and second cutting saw blades and to remove bone or cartilage between cuts created by the first plurality of teeth of the first and second cutting saw blades to form the slot, wherein the second plurality of teeth extend radially closer to the center of each blade than the first plurality of teeth, wherein the first plurality of teeth are disposed about a periphery of each of the first and second blades and extend forward from a most distal end of the blade, and the second plurality of teeth are disposed on the inner surface of the blade and form the inward angle with each of the first and second cutting saw blades, and wherein the first plurality of teeth are disposed in a first row, and the second plurality of teeth are disposed in a second row, the first row being parallel to the second row,wherein teeth of the first plurality of teeth of each of the first and second cutting saw blades are alternating so that every other tooth of the first plurality of teeth is bent at another angle towards the inner surface of the blade; and
a spacer extending from the bottom surface of the base and provided between the first and second cutting saw blades, the spacer having a width equal to the width of the slot formed in the bone or the cartilage.
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Accused Products
Abstract
A saw blade provided with two walls set apart from each other and with blade teeth arranged on each wall in a pattern along the distal end of each wall and on the inner surface of each wall. During a single cutting motion, the distal teeth provide the initial cut and the inner teeth remove additional material along the pathway. This increases the amount of material removed in one cut, leaving a small amount of material (bone) at the bottom of the slot for the surgeon to remove in the final step. Thus, the blade configuration and the tooth pattern of the saw blade improves the cutting efficiency.
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Citations
18 Claims
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1. A cutting saw for removing bone or cartilage to form a slot in bone or cartilage, comprising:
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a base having an oblong shape, a top surface and a bottom surface; a first cutting saw blade and a second cutting saw blade, the first and second cutting saw blades extending from the bottom surface of the base and in a direction parallel to each other, wherein each of the first and second cutting saw blades is provided with a first plurality of teeth extending in a first direction and a second plurality of bent teeth extending in a second direction which is different from the first direction, the second plurality of bent teeth being bent at an inward angle towards an inner surface of a sidewall of each of the first and second cutting saw blades, and the second plurality of bent teeth of the first cutting saw blade being offset from the second plurality of bent teeth of the second cutting saw blade to create interlocking between the first and second cutting saw blades and to remove bone or cartilage between cuts created by the first plurality of teeth of the first and second cutting saw blades to form the slot, wherein the second plurality of teeth extend radially closer to the center of each blade than the first plurality of teeth, wherein the first plurality of teeth are disposed about a periphery of each of the first and second blades and extend forward from a most distal end of the blade, and the second plurality of teeth are disposed on the inner surface of the blade and form the inward angle with each of the first and second cutting saw blades, and wherein the first plurality of teeth are disposed in a first row, and the second plurality of teeth are disposed in a second row, the first row being parallel to the second row, wherein teeth of the first plurality of teeth of each of the first and second cutting saw blades are alternating so that every other tooth of the first plurality of teeth is bent at another angle towards the inner surface of the blade; and a spacer extending from the bottom surface of the base and provided between the first and second cutting saw blades, the spacer having a width equal to the width of the slot formed in the bone or the cartilage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A saw blade for cutting bone or cartilage, comprising:
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a blade body having a center, a periphery, a first surface and an opposing second surface, the blade body having a keel-shape configuration; a first plurality of distal teeth disposed about the periphery of the blade body; and a second plurality of teeth disposed on the first surface of the blade body and forming an angle with the blade body, the first plurality of teeth extending radially further from the center of the blade body than the second plurality of teeth, wherein every other tooth of the first plurality of distal teeth is bent and forms an angle with the first surface, and wherein the second plurality of teeth are arranged in a series of multiple parallel rows of teeth on the first surface forming a V-shaped pattern so that teeth on the opposing sides of the V create an overlap when they cut. - View Dependent Claims (10, 11, 12, 13)
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14. A saw blade for cutting bone or cartilage, comprising:
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a body having a keel-shape configuration; a first plurality of teeth arranged in a first row on the keel-shaped body, each of the plurality of first teeth having a cutting tip directed away from an end of the body; and a second plurality of teeth arranged in a second row on the keel shaped body, each of the plurality of second teeth having a cutting tip directed toward the end of the body and toward the first plurality of teeth, wherein teeth of the first plurality of teeth are alternating so that every other tooth of the first plurality of teeth is bent and forms an angle with a side surface of the body, and wherein the first plurality of teeth are disposed about the periphery of the body and extending forward from the end of the body, and wherein the second plurality of teeth are disposed on the side surface of the body and forming an angle with the body, the second plurality of teeth extending radially closer toward a center of the body than the first plurality of teeth, and wherein the first row is parallel to the second row. - View Dependent Claims (15)
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16. A method of cutting bone to form a slot in the bone for providing an implant in the slot, comprising the steps of:
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providing a cutting saw comprising a base having an oblong shape, a top surface and a bottom surface, and first and second cutting saw blades extending from the bottom surface of the base and in a direction parallel to each other, wherein each of the first and second cutting saw blades is provided with a body, a first plurality of distal teeth disposed about the periphery of the body and arranged in a first row on the body of each blade, and a second plurality of bent teeth disposed on a side surface of the body and forming an angle with the body and arranged in a second row on the body of each blade, the second row being parallel to the first row, the first plurality of distal teeth extending radially further from a center of the body than the second plurality of bent teeth, the second plurality of bent teeth of the first cutting saw blade being offset from the second plurality of bent teeth of the second cutting saw blade to create interlocking between the first and second cutting saw blades and to remove bone between cuts created by the first plurality of distal teeth of the first and second cutting saw blades, wherein the cutting saw further comprises a spacer extending from the bottom surface of the base and provided between the first and second cutting saw blades, the spacer having a width equal to the width of the slot formed in the bone; and cutting bone with the saw blade by providing an initial cut with the distal teeth and removing additional material along a pathway of the initial cut with the second plurality of bent teeth to form the slot in the bone, so that, during a single cutting motion, the distal teeth provide the initial cut and the bent teeth remove the additional material along the pathway of the initial cut to form the slot in the bone. - View Dependent Claims (17, 18)
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Specification