Orthopedic systems and methods for installing an implant and/or boring a bone bicortically. The system may include a drill having a proximal boring portion configured to bore a larger hole in a bone more efficiently when the drill rotates in a first direction compared to an opposite second direction, and a distal boring portion configured to bore a smaller hole in the bone more efficiently when the drill rotates in the second direction. The implant may be configured to be implanted at least partially in the bone, such that a first region of the implant is located in the larger hole and a second region of the implant is located in the smaller hole. In an exemplary method, the larger hole and the smaller hole may be bored in the bone's near cortex and far cortex, respectively, by a shaft and a nose of the drill rotated in opposite directions.

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.

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.

A drill may include a body which is extended along a rotation axis from a first end to a second end. The body may include a first cutting edge, a second cutting edge, a thinning surface, a flute, and an outer peripheral surface. The outer peripheral surface may include a first margin surface, a clearance surface, and a second margin surface. In a plan view of the first end, an imaginary straight line connecting the rotation axis and an end part on a side of an outer periphery in the first cutting edge may be a first straight line, and an imaginary straight line which passes through a center of the first straight line and is orthogonal to the first straight line may be a second straight line. The second straight line may intersect with the second margin surface.

A drill may include a body which is extended along a rotation axis from a first end to a second end. The body may include a first cutting edge, a second cutting edge, a thinning surface, a flute, and an outer peripheral surface. The outer peripheral surface may include a first margin surface, a clearance surface, and a second margin surface. In a plan view of the first end, an imaginary straight line connecting the rotation axis and an end part on a side of an outer periphery in the first cutting edge may be a first straight line, and an imaginary straight line which passes through a center of the first straight line and is orthogonal to the first straight line may be a second straight line. The second straight line may intersect with the second margin surface.

The present invention relates to a dental drill (10) formed of titanium or a titanium alloy having a hardness greater than pure titanium, said drill extending along a central axis (A) from a proximal end (14) to a distal end (16). The drill comprises a shank (12) arranged in a proximal end region of the drill (10) and extending along the central axis (A), a flute portion (20) arranged distally to and running coaxially with the shank (12), said flute portion (20) comprising two or more flutes (22a, 22b, 22c) extending along the flute portion (20) and being interposed by lands (24a, 24b, 24c), the flute portion further comprising a central solid web and a drill tip (26) directly adjoining the distal end (28) of the flute portion (20) and comprising two or more flanks (25a, 25b, 25c) which taper radially inwardly from the distal end of each land in the distal direction toward the central axis (A), each flank (25a, 25b, 25c) comprising a cutting edge (30a, 30b, 30c). According to the invention, at the distal end of the drill point (26) at least one groove (32, 33a, 33c) is formed in the web such that the distal most end (36a, 36b, 37b, 37c) of at least one of the flanks (25a, 25b, 25c) is located radially remote from the central axis (A).

The present invention relates to a dental drill (10) formed of titanium or a titanium alloy having a hardness greater than pure titanium, said drill extending along a central axis (A) from a proximal end (14) to a distal end (16). The drill comprises a shank (12) arranged in a proximal end region of the drill (10) and extending along the central axis (A), a flute portion (20) arranged distally to and running coaxially with the shank (12), said flute portion (20) comprising two or more flutes (22a, 22b, 22c) extending along the flute portion (20) and being interposed by lands (24a, 24b, 24c), the flute portion further comprising a central solid web and a drill tip (26) directly adjoining the distal end (28) of the flute portion (20) and comprising two or more flanks (25a, 25b, 25c) which taper radially inwardly from the distal end of each land in the distal direction toward the central axis (A), each flank (25a, 25b, 25c) comprising a cutting edge (30a, 30b, 30c). According to the invention, at the distal end of the drill point (26) at least one groove (32, 33a, 33c) is formed in the web such that the distal most end (36a, 36b, 37b, 37c) of at least one of the flanks (25a, 25b, 25c) is located radially remote from the central axis (A).

Twist drill bit having a cutting tip (3) with a stepped structure, consisting of a shank (1), a guide region (2) and the adjoining cutting tip (3) with a stepped structure, the stepped structure of which is interrupted by two flutes (5) winding about a drill bit axis (0), wherein the cutting tip (3) with a stepped structure has a drill bit tip (3.1) with a radius (r.sub.o), at which a pair of first main lips (4.1) are formed, and a multiplicity of coaxially arranged cutting steps (3.2), which each have a conical step portion (3.2.1), in which in each case a pair of further main lips (4.2.sub.a-4.2.sub.m) are formed, and a cylindrical step portion (3.2.2), wherein the cylindrical step portions (3.2.2) have, towards the shank (1) , an increasingly large radius (ra.sup.-rm), wherein the difference between in each case one of the radii and the next one of the radii (Ar) is chosen such that, upon rotation about the drill bit axis (0), the pair of further main lips (4.2.sub.a-4.2.sub.m) arranged therebetween sweep in each case over an annular face (A.sub.a-A.sub.m), coaxial with the drill bit axis (0), on an imaginary plane (E) arranged perpendicularly to the drill bit axis (0), and the annular faces (A.sub.a-A.sub.m) have an identical surface area, such that, during drilling, an identical chip volume is carried away with each pair of the further main lips (4.2.sub.a-4.2m).

Twist drill bit having a cutting tip (3) with a stepped structure, consisting of a shank (1), a guide region (2) and the adjoining cutting tip (3) with a stepped structure, the stepped structure of which is interrupted by two flutes (5) winding about a drill bit axis (0), wherein the cutting tip (3) with a stepped structure has a drill bit tip (3.1) with a radius (r.sub.o), at which a pair of first main lips (4.1) are formed, and a multiplicity of coaxially arranged cutting steps (3.2), which each have a conical step portion (3.2.1), in which in each case a pair of further main lips (4.2.sub.a-4.2.sub.m) are formed, and a cylindrical step portion (3.2.2), wherein the cylindrical step portions (3.2.2) have, towards the shank (1) , an increasingly large radius (ra.sup.-rm), wherein the difference between in each case one of the radii and the next one of the radii (Ar) is chosen such that, upon rotation about the drill bit axis (0), the pair of further main lips (4.2.sub.a-4.2.sub.m) arranged therebetween sweep in each case over an annular face (A.sub.a-A.sub.m), coaxial with the drill bit axis (0), on an imaginary plane (E) arranged perpendicularly to the drill bit axis (0), and the annular faces (A.sub.a-A.sub.m) have an identical surface area, such that, during drilling, an identical chip volume is carried away with each pair of the further main lips (4.2.sub.a-4.2m).

A boring tool may include a coupling portion for interfacing with a powered driver, a shank operably coupled to the coupling portion, a cutting portion operably coupled to the shank, and a cutting tip operably coupled to a distal end of the cutting portion relative to the shank. The coupling portion, the shank, the cutting portion and the cutting tip share an axis. The cutting portion may be defined by a plurality of helical cutting flutes that have a variable rate that increases as distance from the cutting tip increases. The shank may include a torsion zone and the cutting tip may include a point angle between about 120 degrees and about 90 degrees.