National Dental Assisting Examining Board (NDAEB) Practice Exam

Which material should be prepared for the placement of a temporary restoration?

1. Zinc Phosphate

2. IRM

3. Glass Ionomer

4. Composite Resin

The correct answer is: IRM

The choice of using IRM (Intermediate Restorative Material) for the placement of a temporary restoration is well-founded due to several key factors. IRM is specifically designed for temporary restorations, providing a suitable balance of strength and manageability. Its formulation allows for easy manipulation, making it simpler for dental professionals to work with during the short-term placement of restorations. One of the main attributes of IRM is its ability to withstand occlusal forces temporarily, which is vital in maintaining the integrity of a tooth until a permanent restoration can be placed. Additionally, IRM has properties that provide some degree of thermal insulation and can be somewhat bio-Compatible, helping to protect the tooth pulp underneath. While other materials listed have specific uses in restorative dentistry, they may not be as ideal for temporary applications. Zinc phosphate is traditionally used for permanent cementation rather than temporary measures. Glass ionomer can be used for temporary restorations but is more frequently utilized for permanent solutions due to its adhesion to tooth structure and fluoride-releasing capabilities. Composite resin is typically reserved for permanent restorations because of its strength and aesthetic qualities, which are not required for temporary applications. Thus, IRM stands out as the most appropriate choice for temporary restoration placement.