Dental OSCE (Objective Structured Clinical Examination) Practice Exam

Which restoration is considered best for pulp and gingival health for a large cavity?

1. Gold onlay

2. Porecelain-fused-to-metal (PFM)

3. Composite restoration

4. Dental amalgam

The correct answer is: Gold onlay

The gold onlay is considered the best restoration for pulp and gingival health in the context of a large cavity due to several key factors. Gold has excellent biocompatibility, which means it is well accepted by the body and is less likely to produce adverse reactions in the surrounding tissues. This characteristic helps to maintain the health of both the pulp and the gingiva. Additionally, gold onlays provide a strong and durable solution for large cavities. They have a lower thermal conductivity compared to materials like amalgam or composite, which can help reduce sensitivity and prevent thermal stresses on the tooth structure. This is particularly important when dealing with larger restorations, as they may experience more significant forces during chewing. Another critical aspect is that gold onlays can be constructed to fit precisely, which minimizes the risk of microleakage. Microleakage can lead to caries or further damage to the pulp and periodontal tissues. A well-fitted onlay helps maintain the integrity of the tooth and ensures that the surrounding gums remain healthy. Higher occlusal strength and wear resistance of gold also contribute to the longevity of the restoration, making it a preferred choice for larger cavities where functional demands are greater. Overall, the combination of excellent biocompatibility, durability