Chuong R
J Am Dent Assoc. 1984 Jul;109(1):59-60. doi: 10.14219/jada.archive.1984.0285.
The dentigerous cyst is generally discovered during routine radiographic examination although it may be found because of secondary infection. Although the patient described in this report had symptoms of infection, discovery of the lesion was late in the course of development of the cyst as it grew to a large size within the antral cavity without causing external expansion. The panoramic radiograph is an excellent method to screen for central jaw disease but may not allow adequate assessment of processes involving the maxillary sinuses. As illustrated by this report, when the absence of a third molar is not explained by the patient's history or by the panoramic radiograph, additional radiographs are essential to specifically visualize the sinuses and upper middle part of the face for accurate diagnosis.
含牙囊肿通常在常规影像学检查时被发现，不过也可能因继发感染而被发现。尽管本报告中描述的患者有感染症状，但该病变在囊肿发展过程中发现较晚，因为它在鼻窦腔内生长到很大尺寸而未引起外部扩张。全景片是筛查颌骨中央疾病的极佳方法，但可能无法充分评估累及上颌窦的病变。如本报告所示，当患者病史或全景片无法解释第三磨牙缺失时，额外的X光片对于清晰显示鼻窦和面部中上部分以进行准确诊断至关重要。
