| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
A-9: Micromechanical Investigations of the Remarkable Damage Tolerance in Tooth-Enamel of Hadrosaurid Dinosaurs |
| Author(s) |
Amruta Vaghela, Soumya Varma, Sid Pathak |
| On-Site Speaker (Planned) |
Amruta Vaghela |
| 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). Statistical analysis using the Weibull distribution provided evidence that the bulk response of the coarse wavy enamel is lower in strength compared to the individual layer response. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Ceramics, Mechanical Properties |