继发龋是指X线片上可显示在金属填充物的窝洞边缘，牙硬组织破坏形成密度______的不规则的窄缝，边缘常不光滑。

单项选择题X线检查对下列哪种牙髓病具有诊断价值？

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

单项选择题Which one of the following may appear on a periapical radiograph of the upper third molar area

单项选择题Interproximal (bitewing) radiographs are most sensitive in detecting caries on which tooth surface

单项选择题In which of the following techniques may a patient be asked to hold the film packet during exposure