Interbody fusion device comprising textured surfaces

An interbody fusion device that comprises a cage having a top surface and an opposite bottom surface, each of said top surface and said bottom surface including a textured surface that comprises:

• a three-dimensional geometric pattern that comprises a plurality of micro-scale projections and first recesses;
• and
• a plurality of nano-scale structures on at least said projections, said nano-scale structures comprising a plurality of stripe-shaped structures and second recesses, each of which has a length, said striped-shaped structures being spaced in a direction transverse to the respective lengths of said striped-shaped structures by said second recesses.

An interbody fusion device that comprises a cage formed of titanium or titanium alloys having a top surface and an opposite bottom surface, each of said top surface and said bottom surface including a textured surface, each of said textured surfaces being prepared by a process comprising the steps of:

• initially laser ablating said top surface and said bottom surface of said cage with a nano-second pulsed laser to form a three-dimensional geometric pattern on each of said top surface and said bottom surface that comprises a plurality of micro-scale projections and recesses;
• and
• then, laser ablating said initially ablated top surface and said bottom surface of said cage with an ultrafast pulsed laser to form a plurality of nano-scale structures on at least said projections, said nano-scale structures comprising a plurality of stripe-shaped structures and second recesses, each of which has a length, said striped-shaped structures being spaced in a direction transverse to the respective lengths of said stripe-shaped structures by said second recesses, said stripe-shaped structures and said second recesses having a depth not greater than 200 nm.

An interbody fusion device that comprises a cage formed of titanium or titanium alloys having a top surface and an opposite bottom surface, each of said top surface and said bottom surface including a textured surface, each of said textured surfaces being prepared by a process comprising the steps of:

• initially laser ablating said top surface and said bottom surface of said cage with a nano-second pulsed laser to form a three-dimensional geometric pattern on each of said top surface and said bottom surface that comprises a plurality of micro-scale projections and recesses;
• and
• then, laser ablating said initially ablated top surface and said bottom surface of said cage with a femtosecond pulsed laser to form a plurality of nano-scale structures on at least said projections, said nano-scale structures comprising a plurality of stripe-shaped structures and second recesses, each of which has a length, said striped-shaped structures being spaced in a direction transverse to the respective lengths of said stripe-shaped structures by said second recesses.