Autografting tool for deep reach applications

A rotary osteotome configured for deep reach applications, said osteotome comprising:

• a shank establishing a longitudinal axis of rotation, said shank extending between a drive end and a transition interface,
• a body extending from said transition interface to an apical end, at least a portion of said body having a conically tapered profile decreasing from a maximum diameter to a minimum diameter adjacent said apical end, a plurality of flutes disposed about said body and extending from adjacent said apical end to respective terminus, each said flute helically spiraling about said conically tapered profile of said body, said plurality of flutes arranged about said body in equal circumferential increments, each said flute having a cutting face on one side thereof defining a rake angle and a densifying face on the other side thereof defining a heel-side angle, a land formed between each adjacent pair of flutes, each said land having a working edge along said cutting face of the one adjacent said flute, a stopper section of said body disposed between said terminus of said flutes and said transition interface of said shank, said stopper section being generally cylindrical, and
• an irrigation conduit passing from an inlet in said shank to a plurality of outlet orifices disposed in said stopper section, said inlet disposed in said drive end of said shank, said inlet being aligned along said longitudinal axis, said plurality of outlet orifices spaced apart from one another in equal circumferential increments about said body.

A rotary osteotome, comprising:

• a shank establishing a longitudinal axis of rotation, said shank extending between a drive end and a transition interface,
• a body extending from said transition interface of said shank to an apical end, at least a portion of said body having a conically tapered profile decreasing from a maximum diameter to a minimum diameter adjacent said apical end, said apical end including a pair of lips, each said lip having a generally planar first trailing flank, a plurality of flutes disposed about said body and extending from adjacent said apical end to respective terminus, each said flute helically spiraling about said conically tapered profile of said body, said plurality of flutes arranged about said body in equal circumferential increments, each said flute having a cutting face on one side thereof defining a rake angle and a densifying face on the other side thereof defining a heel-side angle, each said flute having an axial length and a radial depth, a land formed between each adjacent pair of flutes, each said land having a working edge along said cutting face of the one adjacent said flute, each said working edge being substantially margin-less, said working edges winding about said body in a direction that turns away from a non-cutting direction as said conically tapered profile decreases in diameter, a stopper section of said body disposed between said terminus of said flutes and said transition interface of said shank, said stopper section being generally cylindrical,
• an irrigation conduit passing from an inlet in said shank to a plurality of outlet orifices in said body, said inlet disposed in said drive end of said shank, said inlet being aligned along said longitudinal axis, said irrigation conduit including a generally cylindrical main trunk extending through said shank coincidentally along said longitudinal axis, said main trunk extending through a portion of said stopper section coincidentally along said longitudinal axis, said plurality of outlet orifices being spaced apart from one another in equal circumferential increments about said body, each said outlet orifice having a generally elliptical shape, a flow splitter disposed between said main trunk and said plurality of outlet orifices, said flow splitter configured to divide the flow of irrigating fluid through said main trunk into substantially equal branches to be emitted through the respective said orifices, each said branch being angled at an acute trajectory relative to said longitudinal axis in the direction of said apical end, said acute trajectory of each said branch being between about 10° and 45°.