|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Biological Materials Science
||Spatial Variations in Aging of Teeth about the Arch
||Weishi Yan, Marit Oilo, Avina Paranjpe, Hai Zhang, Dwayne Arola
|On-Site Speaker (Planned)
The microstructure of dentin undergoes a gradual transition with aging that causes a reduction in strength and resistance to fatigue. No study has considered if there are spatial variations in the rate of aging across the arch or tooth-specific properties. In this investigation, multiple teeth were obtained from the arches of adult donors with age≥55 years. The teeth were categorized by their location in the arch and prior restoration. The microstructure and chemical composition were evaluated using microscopy and Raman spectroscopy, respectively, and the strength was evaluated using beams extracted from the middle third of the root. The dentin of anterior teeth exhibited significantly greater mineral to collagen ratio than that of the posterior teeth, but no difference in the degree of collagen cross-linking or strength. The endodontically restored teeth exhibited significantly lower strength than the unrestored pairs, which appears to occur largely as a result of increased collagen cross-linking.
||Planned: Supplemental Proceedings volume