National Dental Assisting Examining Board (NDAEB) Practice Exam

When are retention pins used in the direct restorative process?

1. When there is a cavity

2. When decay has extended beyond the normal size and shape of the cavity preparation

3. When the tooth is sensitive

4. When a cosmetic improvement is needed

The correct answer is: When decay has extended beyond the normal size and shape of the cavity preparation

Retention pins are typically utilized in the direct restorative process when decay has extended beyond the normal size and shape of the cavity preparation. This situation arises when a cavity is large or irregularly shaped, compromising the mechanical retention of the restorative material. In such cases, the addition of retention pins provides enhanced stability by anchoring the restorative material to the tooth structure. The pins create a secure connection and help resist any forces that could dislodge or compromise the integrity of the restoration. This is particularly crucial in cases where traditional bonding would not suffice due to the extent of the damage or loss of tooth structure. While cavities, sensitivity, and cosmetic improvements are valid considerations within dental procedures, they do not specifically warrant the use of retention pins in the context of fulfilling the mechanical requirements for securing a restoration. The primary purpose of the retention pin is to address structural concerns, making it essential when the cavity preparation is not adequate on its own to hold the filling material.