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 dual cure cements should not be used with light transmitting prostheses thicker than: \nSelect and explain. \nA. 1.0 mm, B. 1.5 mm, C. 2.0 mm, D. 2.5 mm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dual-cure cements require mixing similar to that for the chemical-cure systems. Static mixing and trituration of capsules have largely replaced the need for hand mixing.\xa0\nCuring\xa0proceeds\xa0slowly\xa0until\xa0the\xa0cement\xa0is\xa0exposed\xa0to\xa0the\xa0curing light, at which point the cement hardens rapidly. These dual-cure cements should not be used with light-transmitting prostheses thicker than 2.5 mm; anything thicker than 2.5 mm should be bonded with chemical-cure cement.\xa0\nRemoval of excess cement may be performed after seating or after waiting for a specific period as indicated in the manufacturer’s directions for use.\n\nRef: Phillip’s 12th edition page 330', 'role': 'assistant'}]