How do hybrid glass ionomers (RMGI) compare to regular glass ionomers?

Hybrid glass ionomers, or resin-modified glass ionomers (RMGI), are designed to combine the beneficial properties of glass ionomer cements with enhancements that make them suitable for a wider range of clinical applications. The correct choice indicates that RMGIs have a higher fluoride release compared to regular glass ionomers while exhibiting lower compressive strength.

The increased fluoride release in RMGIs is beneficial because fluoride has been shown to have a caries-preventive effect, contributing to the remineralization of tooth structure and enhancing the anti-cariogenic properties of the material. This feature is especially advantageous in areas at high risk for decay, such as in pediatric patients or in individuals with a history of caries.

In terms of compressive strength, although RMGIs do exhibit satisfactory strength for many purposes, their compressive strength can be slightly lower than that of conventional glass ionomers under certain conditions. This is particularly significant in applications where high mechanical strength is critical, such as in load-bearing restorations.

Thus, the correct option effectively captures the comparative aspects of fluoride release and compressive strength between hybrid and regular glass ionomers, emphasizing the unique advantages and limitations of RMGIs in dental applications.