Which restoration material is likely to provide the best marginal integrity in a posterior tooth?

Which restoration material is likely to provide the best marginal integrity in a posterior tooth?

• A. Gold
• B. Composite resin
• C. Amalgam
• D. Glass ionomer

Answer: (A)

The choice of gold as the material likely to provide the best marginal integrity in a posterior tooth is based on its superior material properties compared to the other options. Gold restorations are known for their excellent fit due to the ability to custom fabricate them, leading to minimal tolerance at the margins. This precision is vital for preventing micro-leakage, which can protect the pulp from irritants and decay over time. Gold also possesses excellent mechanical strength and resistance to wear, which is particularly beneficial in posterior teeth that endure significant occlusal forces. Unlike materials such as composite resin, which can be more technique-sensitive and prone to shrinkage upon curing, or amalgam, which may not achieve the same polished finish and fit, gold provides a stable, durable solution that maintains its integrity well over time. In contrast, glass ionomer material, while beneficial for its fluoride release and adhesion to tooth structure, typically doesn’t offer the same level of marginal adaptation and strength as gold, particularly in high-load areas such as posterior teeth. Therefore, in terms of marginal integrity, gold stands out as the optimal choice.

The choice of gold as the material likely to provide the best marginal integrity in a posterior tooth is based on its superior material properties compared to the other options. Gold restorations are known for their excellent fit due to the ability to custom fabricate them, leading to minimal tolerance at the margins. This precision is vital for preventing micro-leakage, which can protect the pulp from irritants and decay over time.

Gold also possesses excellent mechanical strength and resistance to wear, which is particularly beneficial in posterior teeth that endure significant occlusal forces. Unlike materials such as composite resin, which can be more technique-sensitive and prone to shrinkage upon curing, or amalgam, which may not achieve the same polished finish and fit, gold provides a stable, durable solution that maintains its integrity well over time.

In contrast, glass ionomer material, while beneficial for its fluoride release and adhesion to tooth structure, typically doesn’t offer the same level of marginal adaptation and strength as gold, particularly in high-load areas such as posterior teeth. Therefore, in terms of marginal integrity, gold stands out as the optimal choice.