An inlay is a fixed prosthodontic restoration used to restore a cavity in a tooth. Which one of the following materials is not suitable for inlay construction?

In dentistry, inlays are used to restore the structure and function of a tooth that has been damaged by decay or trauma. The materials typically used for inlays must be durable, biocompatible, and capable of withstanding the forces of chewing.

Ceramic, composite, and gold are all suitable materials for inlay construction. Ceramic and composite inlays can be designed to match the natural color of the teeth, providing aesthetic appeal while offering good strength and wear resistance. Gold inlays, known for their excellent strength and durability, have been used for many years due to their longevity and ability to withstand heavy occlusal forces.

In contrast, glass ionomer material, while beneficial in certain applications, is not typically suitable for inlays. Glass ionomer is often used for fillings in areas subject to lower forces or for its properties as a liner or base under other restorations. It has a more limited strength and wear resistance compared to the other materials listed, which makes it less ideal for the demands placed on an inlay restoration, especially in posterior teeth where significant wear and chewing forces occur. Therefore, the choice of glass ionomer for inlay construction is not recommended due to its inadequate performance characteristics in this context.