Cutting elements
Cutting elements may include points, tips, cutting portions and/or shafts of various geometries depending on requirements of the intended use. Tip geometries described may be used for cutting burrs, k-wires and/or drill bits in many types of applications. In particular, the tip geometries described may be used in medical applications. For example, tip geometries as described herein may be used for drilling bones, cartilage, and similar structures during surgery. Tip geometry may influence cutting ability. Use of the tip geometries described may allow the cutting element to be positioned at varying angles relative to the surface to be cut. In some instances, a tip geometry for a cutting element may be selected such that it reduces and/or inhibits movement of the cutting element during use and/or allows for a predetermined angle of entry into a surface to be cut. Using the designs described herein may reduce and/or inhibit damage, heat, and/or trauma to materials that are to be cut, for example, tissues such as bone and/or cartilage.
1. A cutting element comprising:
an engaging point configured to engage a material to be cut;
a tip proximate the engaging point;
a cutting portion comprising:
one or more faces forming at least a surface of the cutting portion;
one or more gashes formed in the cutting portion;
a cutting edge formed at an intersection of the one or more faces and the one or more gashes; and
a shaft portion proximate the cutting portion, the shaft portion comprising one or more flutes, wherein edges of the one or more flutes are discontinuous, and a size of a flute of the one or more flutes varies along a longitudinal axis of the cutting element, wherein at least one edge of the edges comprise a plurality of chip splitters, and wherein each chip splitter of the plurality of chip splitters comprise an elliptical arc, wherein a first vertex of a major axis of an ellipse defining the elliptical arc is further from the engaging point and closer to the longitudinal axis of the cutting element than a second vertex of the major axis of the ellipse.
2. The cutting element of claim 1 , wherein at least one of the one or more flutes communicate with at least one of the one or more gashes such that debris is guided away from a cutting location.
3. The cutting element of claim 1 , wherein the tip forms an angle with a central longitudinal axis of the cutting element in a range from 20 degrees to 80 degrees.
4. The cutting element of claim 1 , wherein the tip forms an angle with a central longitudinal axis of the cutting element in a range from 30 degrees to 60 degrees.
5. The cutting element of claim 1 , wherein the tip forms an angle with a central longitudinal axis of the cutting element of about 30 degrees.
6. The cutting element of claim 1 , wherein at least one of the one or more gashes forms an angle with a central longitudinal axis of the cutting element in a range from 10 degrees to 40 degrees.
7. The cutting element of claim 1 , wherein at least one of the one or more gashes forms an angle with a central longitudinal axis of the cutting element of 18 degrees.
8. The cutting element of claim 1 , wherein the cutting element comprises a drill bit, a k-wire, and/or a burr.