Australian Dental Council (ADC) Practice Test

Hybrid composite resin is primarily used in posterior teeth due to its greater overall strength. Posterior teeth, which include molars and premolars, are subjected to heavy occlusal forces during chewing and grinding. Therefore, materials used in these areas must offer sufficient strength and durability to withstand these forces without fracturing or wearing down prematurely.

Hybrid composites combine the benefits of both microfilled and macrofilled composites, offering a balance between strength and esthetics. The materials used in hybrid composites are engineered to be robust, allowing them to handle the mechanical stress typical in the posterior region effectively. This strength makes them suitable for dental restorations such as fillings and inlays where resilience and longevity are essential.

While other choices represent important properties of composite materials, such as color matching or adhesion, they do not directly relate to the primary requirement in posterior teeth restorations, which is the ability to endure significant forces without compromising the restoration's integrity.