What is the role of inorganic fillers in composite materials?

Incorporating inorganic fillers into composite materials plays a crucial role in enhancing the mechanical properties, particularly the strength of the composite. These fillers, which can include materials such as glass, quartz, or silica, contribute to an overall increase in the material's rigidity and toughness. This is especially important in dental composites, as they need to endure significant stresses and wear during normal function, such as chewing.

By increasing strength, inorganic fillers help ensure that the composite can withstand the forces it will encounter in an oral environment, while also contributing to the longevity and performance of dental restorations. This strength is vital for both the functionality of the dental restoration and the prevention of breakage or wear over time.

Other options, while relevant to composite materials, do not accurately capture the primary role that inorganic fillers serve. Decreasing viscosity is often achieved by other means, enhancing aesthetic appearance relies more on the choice of matrix and pigments, and facilitating bonding typically relates to chemical agents or treatments rather than the fillers themselves.