What are the effects of prolonged exposure to alkalis on resin composite?
Prolonged exposure to alkalis can significantly degrade resin composite materials, commonly used in dental and industrial applications. Alkaline environments cause hydrolysis of the resin matrix, leading to reduced mechanical strength, surface erosion, and loss of structural integrity. The filler-matrix interface is particularly vulnerable, resulting in microcracks and decreased wear resistance. In dental composites, this degradation may compromise restoration longevity. The extent of damage depends on alkali concentration, exposure duration, and composite formulation. Studies suggest that highly cross-linked resins and improved filler technologies offer better alkali resistance. Understanding these effects is crucial for material selection in harsh chemical environments.
