What happens to the elastic properties of rubber impression materials over time?

The elastic properties of rubber impression materials typically improve with time due to a phenomenon known as "curing" or "cross-linking." As the material continues to cure after it has been mixed and placed, the molecular structure becomes more interconnected, leading to enhanced elasticity and stability. This process allows the impression material to recover better from deformation, ultimately resulting in a more accurate representation of the dental structures being captured.

It's important to consider that while some materials might show initial setting or softening, the long-term effects generally involve strengthening due to the complete curing process. This contrasts with other materials, which might lose elasticity or become less effective when exposed to adverse conditions like excessive heat or moisture. Understanding this behavior is crucial for dental professionals when selecting and working with rubber impression materials to ensure optimal results in dental impressions.