Selective Laser Melting: a regular unit cell approach for the manufacture of porous, titanium, bone in-growth constructs, suitable for orthopedic applications.
In this study, a novel porous titanium structure for the purpose of bone in-growth has been designed, manufactured and evaluated. The structure was produced by Selective Laser Melting (SLM); a rapid manufacturing process capable of producing highly intricate, functionally graded parts. The technique described utilizes an approach based on a defined regular unit cell to design and produce structures with a large range of both physical and mechanical properties. These properties can be tailored to suit specific requirements; in particular, functionally graded structures with bone in-growth surfaces exhibiting properties comparable to those of human bone have been manufactured. The structures were manufactured and characterized by unit cell size, strand diameter, porosity, and compression strength. They exhibited a porosity (10-95%) dependant compression strength (0.5-350 Mpa) comparable to the typical naturally occurring range. It is also demonstrated that optimized structures have been produced that possesses ideal qualities for bone in-growth applications and that these structures can be applied in the production of orthopedic devices.
Mullen
Lewis
L
Department of Engineering, The University of Liverpool, Liverpool, United Kingdom.
Stamp
Robin C
RC
Department of Engineering, The University of Liverpool, Liverpool, United Kingdom.
Brooks
Wesley K
WK
Department of Engineering, The University of Liverpool, Liverpool, United Kingdom.
Jones
Eric
E
Department of Advanced Technology, Stryker Orthopaedics, Cork, Ireland.
Sutcliffe
Christopher J
CJ
Department of Engineering, The University of Liverpool, Liverpool, United Kingdom.
D001672:Biocompatible Materials / Q000737:chemistry*; D018786:Bone Substitutes / Q000737:chemistry*; D019245:Compressive Strength; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D009983:Orthopedic Equipment; D016062:Porosity; D019736:Prostheses and Implants; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D001672:Biocompatible Materials; D018786:Bone Substitutes; D014025:Titanium