HESI General Chairside Assisting Practice Exam

What additive is used in intermediate restorative material (IRM) to provide sedative effects for the pulp?

1. Menthol

2. Eugenol

3. Fluoride

4. Chlorhexidine

The correct answer is: Eugenol

The correct answer is eugenol, which is indeed used in intermediate restorative material (IRM) for its sedative properties on the dental pulp. Eugenol possesses analgesic and anti-inflammatory effects, making it particularly beneficial in situations where the pulp may be sensitive or inflamed. Its ability to soothe the pulp helps to alleviate discomfort for the patient during the restorative process, promoting a more comfortable experience. In dental applications, eugenol is frequently derived from clove oil and has been used for many years in various dental materials due to its effective properties. Its inclusion in IRM not only aids in reducing potential pulp irritation but also contributes to its sealing ability within the cavity preparation, which can further protect the pulp from external irritants. Other options, while relevant to dental care, do not serve this specific purpose. Menthol is primarily used for its cooling sensation and does not provide the same sedative effects. Fluoride is well-known for its role in strengthening teeth and providing decay prevention but does not have sedative properties for the pulp. Chlorhexidine, while used as an antimicrobial agent in various dental procedures, does not offer a sedative effect on the pulp tissue either. Thus, eugenol stands out as the sole additive in IRM recognized