About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
3D Printing of Biomaterials and Devices
|
| Presentation Title |
Engineering Location, External Shape, and Internal Pore Geometry, to Achieve Stiffness-Matched, 3D Printed, Nickel-Titanium Mandibular Graft Fixation Plates |
| Author(s) |
Luis H. Olivas Alanis, Agnieszka Chmielewska-Wysocka, Ciro Rodriguez, David Dean |
| On-Site Speaker (Planned) |
Luis H. Olivas Alanis |
| Abstract Scope |
Graft fixation plates that ensure stability at the osteotomy site during healing are essential for the skeletal reconstruction of segmental skeletal defects. In order to prevent stress-shielded bone loss and stress concentration-induced device failure, we are studying the super-elastic properties of nickel-titanium (NiTi) versus the standard-of-care material, Ti6Al4V. We report on a 4-point bending evaluation of the ductility of unbent, non-personalized, 3D-printed NiTi skeletal plates incorporating a porous region. All pore geometries studied presented an apparent elastic modulus 〈E〉=23.75±3.33 GPa. While our objective in stiffness matching is regional, it is also beneficial for the plate to align with the elasticity of cortical bone (E=10-30 GPa), as this promotes the engagement of the entire plate and the healing region as a whole. Additionally, the location of the plate shape is expected to aid in healing as well as to restore the normal stress-strain trajectories (loading patterns) in the reconstructed bone. |