Age Changes in Enamel, Dentin, Pulp and Periodontium
Ageing is defined as a process of morphological and physiological disintegration as distinguished from infant, childhood and adolescence which are typified by processes of integration and coordination.
Age Changes in Enamel
MACROSCOPIC
1) Becomes darker
2) Attrition, Abrasion, Erosion
3) Longitudinal cracks
MICROSCOPIC
1) Decreased - enamel rod ends - perikymata - permeability to fluids
2) Increase in nitrogen and fluorine
3) Increased resistance to decay
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