锥形束计算机断层扫描（CBCT）及其他放射成像方法在下颌第三磨牙术前评估中的可靠性
Reliability of CBCT and other radiographic methods in preoperative evaluation of lower third molars.
作者信息
Suomalainen Anni, Ventä Irja, Mattila Mika, Turtola Lauri, Vehmas Tapio, Peltola Jaakko S
机构信息
Department of Radiology, Helsinki University Central Hospital, Helsinki, Finland.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Feb;109(2):276-84. doi: 10.1016/j.tripleo.2009.10.021.
OBJECTIVES
The aim of this study was to compare the reliability of cone-beam computerized tomography (CBCT) with that of other radiographic methods in preoperative radiographic determination of the number of roots of lower third molars and their relationship to the inferior alveolar canal (IAC).
STUDY DESIGN
Forty-two teeth were clinically studied and imaged using CBCT and other imaging methods-panoramic radiography, multiprojection narrow-beam radiography (MNBR), and cross-sectional tomography. Statistical analysis (kappa values) was used to compare the diagnoses of 2 trained oral radiologists and the radiologic diagnoses with the findings at operation.
RESULTS
Cone-beam CT revealed the number of roots of teeth more reliably than panoramic radiographs. CBCT examination was highly reliable in locating the IAC, whereas MNBR was unreliable and cross-sectional tomography fell between the two. With cross-sectional tomography, the IAC was noninterpretable in one-third of the cases.
CONCLUSIONS
We recommend CBCT examination for preoperative radiographic evaluation of complicated impacted lower third molars.
目的
本研究旨在比较锥形束计算机断层扫描（CBCT）与其他放射成像方法在术前放射成像确定下颌第三磨牙牙根数目及其与下颌管（IAC）关系方面的可靠性。
研究设计
对42颗牙齿进行临床研究，并使用CBCT和其他成像方法——全景放射摄影、多投影窄束放射摄影（MNBR）和断层扫描进行成像。采用统计分析（kappa值）比较两名训练有素的口腔放射科医生的诊断结果以及放射学诊断结果与手术所见。
结果
锥形束CT显示牙齿牙根数目比全景放射摄影更可靠。CBCT检查在定位下颌管方面高度可靠，而MNBR不可靠，断层扫描则介于两者之间。在断层扫描中，三分之一的病例无法解读下颌管。
结论
我们建议对复杂阻生下颌第三磨牙进行术前放射学评估时采用CBCT检查。
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