| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Micromechanical Investigations of the Remarkable Damage Tolerance in Tooth-enamel of Hadrosaurid Dinosaurs |
| Author(s) |
Soumya Varma, Sid Pathak, Gregory Erickson, Brandon Krick, Jakob Schwiedrzik, Johann Michler, Arun Devaraj, Michael P Thompson |
| On-Site Speaker (Planned) |
Soumya Varma |
| Abstract Scope |
This research aims to understand the biomechanical form, function, and structure of the enamel (a ceramic-like composite) known as aprismatic coarse wavy enamel (CWE) in the grinding dentition of herbivores hadrosaurid dinosaurs. Preliminary analysis of this tissue shows an undulating wavy structure in WE composed of folded layers of hydroxyapatite crystallites separated by thin layers of loosely aggregated interlayer matrix.
We used optical profilometry, BSE-SEM, APT, DUV-Raman to investigate microstructural attributes responsible for its remarkable damage tolerance. We correlated this information with spherical nanoindentation and micropillar compression experiments quantifying elastic (Modulus) and plastic (Yield Strength, Fracture Stress) properties at individual layers (few µm3 volumes) and the global CWE ensemble level (10s of µm3 volumes). Interestingly, the elastic mismatch between layers in combination with the kinking of layers enhances damage tolerance exclusively in the transverse/occlusal plane, promoting the integrity of the enamel crest. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Surface Modification and Coatings, Characterization |