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: Radiology
[{'content': 'Bitewing radiographs are best suited to monitor: \nSelect and explain. \nA. Unerupted teeth, B. Crestal bone levels, C. Crown preparations, D. Endodontic procedures', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bitewing (also called interproximal) images include the crowns of the maxillary and mandibular teeth and the alveolar crest on the same\xa0receptor.\xa0\xa0\nBitewing\xa0receptors\xa0are\xa0particularly\xa0valuable\xa0for detecting interproximal caries in the early stages of development before it becomes clinically apparent. Because of the horizontal angle of the X-ray beam, these radiographs also may reveal secondary caries below restorations that may escape recognition in the periapical views.\nBitewing projections are also useful for evaluating the periodontal condition. They provide a good perspective of the alveolar bone crest, and changes in bone height can be assessed accurately through comparison with the adjacent teeth. In addition, because of the angle of projection directly through the interproximal spaces, the bitewing receptor is especially effective and useful\xa0for\xa0detecting calculus\xa0deposits\xa0in\xa0interproximal\xa0areas. (Because of its relatively low radiodensity, calculus is better visualized\xa0on\xa0images made with reduced\xa0exposure).\n\nOral radiology White and Pharaoh; 7th ed. Page no 114', 'role': 'assistant'}]