What is a main advantage of lithium disilicate-containing ceramics over leucite-containing ceramics?

Lithium disilicate-containing ceramics are known for their superior mechanical properties compared to leucite-containing ceramics, particularly in terms of flexural strength. The presence of lithium disilicate allows for a denser and more controlled glass-ceramic matrix, contributing to an improved ability to withstand stress during function. This is crucial in dental applications where the materials frequently endure various types of stresses from mastication and other forces.

In contrast, leucite-containing ceramics typically exhibit lower flexural strength because the leucite crystals do not provide the same level of reinforcement and resilience as lithium disilicate does. This difference is significant when selecting materials for dental restorations, as higher flexural strength can lead to better longevity and durability of the dental prosthesis. Therefore, the main advantage of lithium disilicate ceramics is their enhanced flexural strength, making them a preferred choice in modern dentistry for applications like anterior and posterior restorations.