Which statement about resin cements is true?

• A. Film thickness is between 55 and 65 μm.
• B. Compressive strength is between 180 and 300 MPa.
• C. Flexural strength is between 20 and 40 MPa.
• D. Immediate shear bond strength is between 5 and 8 MPa.

Answer: (B)

The statement about resin cements indicating that their compressive strength is between 180 and 300 MPa is accurate. This range highlights the durability and strength of resin cements, which is crucial for their performance in dental restorations. High compressive strength allows resin cements to withstand the forces typically encountered in the oral environment, ensuring the longevity and stability of the bonded restoration.

In terms of clinical application, the compressive strength of resin cements is a critical factor when selecting materials for various types of restorations, such as crowns and bridges, where significant biting forces are present. A material with lower compressive strength might not provide adequate support, potentially leading to failures or compromised restorations over time.

The other statements have different ranges that do not accurately reflect the typical properties of resin cements. It is essential to have a correct understanding of these material properties to make informed choices during dental procedures.