Which filling materials are the most resistant for class IV cavities?

Class IV cavities are primarily located on the anterior teeth and involve the incisal edge or the interproximal surface. The choice of filling materials for these types of cavities is crucial because they need to endure various stresses while also being aesthetically pleasing.

Resins with glass or quartz are particularly advantageous for Class IV restorations due to their excellent mechanical properties, which provide significant strength and durability. The incorporation of glass fillers or quartz in resin composites enhances their wear resistance and ensures they can withstand the forces generated during chewing. Moreover, these materials can be color-matched to the natural tooth, making them a preferred choice for anterior restorations where aesthetics are important.

In contrast, other materials mentioned may not offer the same level of resistance to wear or mechanical stresses. For example, resins with silicone dioxide, while stable, may not provide superior strength compared to those with glass or quartz. Silico-phosphate and silicates, although historically used, may not possess the same durability and aesthetic quality as modern resin composites reinforced with glass or quartz. Thus, the superior resistance of resins with glass or quartz makes them the optimal choice for Class IV cavities.