National Dental Assisting Examining Board (NDAEB) Practice Exam

What is the primary function of a low-strength base in dental procedures?

1. Act as a barrier to irritating chemicals

2. Provide aesthetic benefits to the tooth

3. Enhance the adhesion of fillings

4. Completely replace lost enamel

The correct answer is: Act as a barrier to irritating chemicals

The primary function of a low-strength base in dental procedures is to act as a barrier to irritating chemicals. This base is typically placed under restorations to protect the dental pulp from thermal, chemical, and mechanical irritation caused by restorative materials or the environment within the oral cavity. By creating a protective layer, it helps to minimize inflammation and discomfort, ultimately promoting healing and preserving the health of the tooth structure and pulp. Low-strength bases do not provide aesthetic benefits or enhance adhesion of fillings to the same degree as other materials specifically designed for these purposes. Additionally, they cannot replace lost enamel, as that requires a different approach, often involving bonding agents or restorative materials that mimic the structural and functional aspects of natural tooth enamel. The role of a low-strength base is primarily protective, making it crucial for maintaining the integrity and health of the underlying dental structures during and after restorative procedures.