问答题简要叙述根尖周炎的三种类型及其影像学表现和鉴别诊断。
单项选择题龋病是牙硬组织发生慢性进行性破坏的一种疾病,龋病按照进展情况分为_____
单项选择题下颌横断合片主要用于
单项选择题Which of the following imaging techniques does not use X rays
单项选择题Which of the following is considered to be an extraoral technique