Abstract:

Objective     To explore the value of cone-beam computed tomography（CBCT）in diagnosing complicated periapical diseases. Methods    Forty teeth were studied. X-ray periapical images（taken at horizontal 0°and distal 10° angulated projection）and CBCT were taken at the same time. The presence of apical lesions and their extents（if existed）were observed；periapical index（PAI）scoring system was used for assessing lesions extent. Compare the difference on diagnosis and judgement of causes. Results    Disagreement was found between X-ray periapical image and CBCT in lesions assessment and PAI scoring. More valuable information was obtained by CBCT. Conclusion    CBCT is a very useful tool in the diagnosis of complex periapical diseases.

Key words: cone-beam computed tomography, X-ray periapical image, periapical index

摘要：

目的    评价锥形束CT（CBCT）检查对根尖周病复杂病例的诊断价值 。方法    于2013 年5月至2014年5月从沈阳市铁西区牙病防治所门诊随机选取以不明原因牙痛为主诉的患者40例（患牙40颗），拍摄患牙X线根尖片（常规正位和远中10°平行投照）并进行CBCT检查，采用根尖周指数（PAI）评价根尖周病损状况，比较两种方法对根尖周病复杂病例诊断及病因判断的差异。结果    X线根尖片与CBCT检查在判断患牙有无根尖周病损上一致性差；两种方法对患牙PAI 分级判断的一致性亦差；CBCT检查能够更好地明确牙痛原因。结论    CBCT 检查有助于诊断临床上不明病因的根尖周病复杂病例。

关键词: 锥形束CT, X线根尖片, 根尖周指数