What type of cement is known for having a sedative effect on the pulp?

Zinc oxide eugenol is known for its sedative effect on the dental pulp, making it a popular choice in dentistry, particularly for temporary fillings and as a base under restorations. This sedative quality is primarily due to eugenol, a compound derived from clove oil, which has anti-inflammatory properties that can help soothe the pulp tissues. This characteristic makes zinc oxide eugenol especially beneficial in scenarios where the pulp may be sensitive or inflamed, providing comfort to the patient during treatment.

In contrast, glass ionomer cement and resin-modified glass ionomer cement do not have the same sedative effects on the pulp. While glass ionomer cements are used for their chemical bonding properties and their ability to release fluoride, they lack the soothing qualities associated with zinc oxide eugenol. Composite resins, while widely used for their aesthetic appeal and strong adhesion, also do not have a sedative effect on the pulp. Therefore, zinc oxide eugenol stands out for its specific properties that provide relief to the pulp tissue, making it the correct answer to this question.