National Dental Assisting Examining Board (NDAEB) Practice Exam

What is a common indication for the use of a low-strength base?

1. To enhance aesthetic qualities of fillings

2. To relieve sensitivity after dental procedures

3. To act as a barrier to chemical irritation

4. To provide fluoride release for decay prevention

The correct answer is: To act as a barrier to chemical irritation

A low-strength base is commonly used in dentistry primarily for its role as a barrier to chemical irritation. This is particularly important when a dental restoration is placed in close proximity to the pulp of the tooth. The base acts to protect the sensitive dental pulp from potential irritants such as acidic materials and those involved in the restorative process. Its application helps to reduce the risk of pulpitis, which can occur due to irritation from the restorative materials or from oral bacteria. While there are other reasons why dental materials might be used, they do not align as closely with the primary function of a low-strength base. For instance, enhancing aesthetic qualities of fillings is generally related to the choice of restorative materials themselves rather than the function of a base. Relieving sensitivity after dental procedures can involve different treatments, such as desensitizing agents, rather than relying solely on a low-strength base. Finally, the provision of fluoride release for decay prevention is associated more with specific materials or treatments aimed at caries prevention rather than the primary purpose of a low-strength base. Thus, the use of a low-strength base's protective role makes it a crucial component in managing pulp health during restorative procedures.