The Effect of Titanium Nitride Coatings on the Ingrowth and Interface Strength of Three-Dimensional Printed Porous Implants.

Background: The impact of titanium nitride (TiN) coatings on biologic fixation of modern titanium-based porous surfaces fabricated using additive manufacturing (AM) techniques remains unexplored. This study aimed to compare the biological fixation of three-dimensional (3D)-printed porous implants, with and without TiN coating, in a canine model.

Methods: A canine femoral transcortical model was used to evaluate the characteristics of bone ingrowth of fully porous Ti-6Al-4V cylindrical implants fabricated using either laser rapid manufacturing or electron beam melting.