PEDICLE SCREW SURFACE TREATMENT FOR IMPROVING BONE-IMPLANT INTERFACE
A method for surface treatment of a pedicle screw including roughening a surface of a pedicle screw by blasting the surface with a Resorbable Blast Media (RBM).
1 . A method for surface treatment of a pedicle screw comprising:
roughening a surface of a pedicle screw by blasting the surface with a Resorbable Blast Media (RBM), and comprising passivating said surface after RBM blasting without acid etching.
2 . The method according to claim 1 , comprising blasting said surface with calcium phosphate particles.
3 . The method according to claim 1 , wherein said pedicle screw is constructed of a titanium alloy and said surface is blasted with calcium phosphate particles.
4 - 5 . (canceled)
6 . The method according to claim 1 , wherein said surface of said pedicle screw comprises at least one of crests and valleys of screw threads.
7 . The method according to claim 1 , wherein said surface of said pedicle screw comprises at least one of a shank and a head of said pedicle screw.
8 . The method according to claim 1 , wherein said surface of said pedicle screw comprises a polyaxial head of said pedicle screw.
9 . The method according to claim 1 , wherein said surface of said pedicle screw is blasted to approximately a 2 μM average roughness.
10 . The method according to claim 1 , wherein said surface of said pedicle screw is blasted to approximately a 3 μm average roughness.
11 . The method according to claim 1 , wherein said surface of said pedicle screw is blasted to approximately a 3.34 μm average roughness.
12 . An article comprising:
a pedicle screw comprising a surface roughened by blasting the surface with a Resorbable Blast Media (RBM), and passivating said surface after RBM blasting without acid etching.
13 . The article according to claim 12 , wherein said surface of said pedicle screw has approximately a 3.34 μm average roughness.