What distinguishes zinc oxide-eugenol packs from non-eugenol packs?

The distinguishing feature of zinc oxide-eugenol packs compared to non-eugenol packs is primarily related to their potential for allergic reactions. Zinc oxide-eugenol (ZOE) packs contain eugenol, which is derived from clove oil and has been noted for its potential to cause allergic reactions in some individuals. This is an important consideration in clinical practice, as patients who have a history of sensitivity to eugenol may experience adverse effects from ZOE materials.

On the other hand, non-eugenol packs, which are often formulated to avoid eugenol, are designed to minimize this risk, making them a preferable choice for patients with known allergies to this compound. Therefore, the presence of eugenol in zinc oxide-eugenol packs creates a significant difference, particularly concerning patient safety and comfort.

The other options, while relevant to various dental materials, do not directly address the core differentiator between the two types of packs as effectively as the consideration of potential allergic reactions associated with eugenol.