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题目： 单选题患者，男性，52岁，左下后牙咬硬物时，偶可引起明显疼痛，半年余，近两天进冷热食物疼痛较重，要求治疗查：左下第一磨
面磨耗重、舌尖陡高、探诊敏感、远中可见隐裂、冷测疼痛明显、刺激去除后持续数秒、叩（±）。该牙的治疗方案应为（）
A拔除
B牙髓治疗后全冠修复
C调
D脱敏
E备洞充填
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