This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'The effect of zinc oxide-eugenol on the pulp: \nSelect and explain. \nA. Is irritating, B. Encourages pulpal fibrosis, C. Is sedating, D. Has no effect', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Temporary ZOE cements, including eugenol-free cement, are excellent for luting provisional acrylic crowns and fixed partial dentures. Temporary ZOE restorations are expected to last a few weeks at most. They seal the dentinal tubules surprisingly well against the ingress of oral fluids and have a sedative effect on the pulp.\xa0 Hence, irritation caused by microleakage is minimized and these cements are suitable for temporary restorative treatment while the pulp heals or until a longer-lasting restoration can be fabricated\xa0 and cemented.\nReference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 331', 'role': 'assistant'}]