Australian Dental Council (ADC) Test 2025 – 400 Free Practice Questions to Pass the Exam

High filler content is crucial for dental composite restorative resins used in load-bearing areas primarily because it enhances the material's mechanical properties. Increased filler content contributes to greater strength, wear resistance, and overall durability, which are essential characteristics in environments subjected to significant forces, such as molars and premolars.

In load-bearing situations, restorative materials must withstand the stresses of chewing and grinding. Higher filler content allows for a denser composite, which is better suited to handle these mechanical demands without experiencing deformation or failure. This increase in strength helps to reduce the likelihood of fractures or wear over time, ensuring the longevity of the restoration.

While sub-micro sized particles can improve smoothness and polishability, and adequate color matching is important for aesthetic considerations, these factors do not directly influence the load-bearing capacity of the restoration. Additionally, a high coefficient of thermal expansion would not be beneficial as it can lead to issues such as debonding or microleakage due to differential expansion and contraction between the restorative material and the tooth structure.