| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
3D Printing of Biomaterials and Devices
|
| Presentation Title |
Engineering Porosity for the Stiffness-Matching of Nickel-Titanium Mandibular Graft Fixation Plates |
| Author(s) |
Luis H. Olivas Alanis, Andrew Nguyen, Agnieszka Chmielewska, Sahil Khambhampati, Stephen Niezgoda, Ciro Rodriguez, David Dean |
| On-Site Speaker (Planned) |
Luis H. Olivas Alanis |
| Abstract Scope |
Mandibular grafting is relatively common following bone resection due to trauma or illness. However, the healed bone may eventually fail if the current standard-of-care Ti6Al4V (E = 116 GPa) fixation does not allow restoration of normal loading. NiTi (E = 48 GPa) can be 3D printed with designed porosity, further reducing stiffness, aiming to insure all pieces remain in compression while healing. We assessed the effect of multiple pore geometries according to the ASTM F382 standard and no difference in the single-cycle to failure test results (apparent elastic modulus 〈E〉=23.75±3.33 GPa). While our goal is not to match the cortical bone elasticity (E=10-30 GPa), approaching that stiffness can help the plate offer optimal load transfer during healing and in restoring the normal stress-strain trajectory once the bone has healed. Further work is underway to assess the relative risk of fatigue failure of various pore geometries under cyclic loading conditions. |