口腔颌面影像诊断学模拟考题1单选题（50分）1. Which one of the following anatomy is not usually apparent radiographically?A) enamel B) dentin C) cementum D) pulp cavity2. Periodontal ligament space appears as a radiolucent space between the tooth root and the _.A) alveolar crest B) lamina dura C) cancellous bone D) trabecular bone3. Which one of the following may appear on a periapical radiograph of the upper third molar area?A) external oblique ridge B) mylohy
