锥体束CT在诊断上颌磨牙腭根折裂中的应用

目的：评价X线根尖片和锥体束CT在上颌磨牙腭根折裂中的诊断价值。方法以临床检查25例可疑为腭根横折,9例腭根纵裂的患者为研究对象。拍摄X线根尖片及锥形束CT,分别根据X线片诊断标准和CBCT诊断标准对影像学检查结果做独立判断,并与拔除患牙或翻瓣术中观察结果进行比较。结果 CBCT在腭根纵裂中诊断敏感率为87.5%,X根尖片诊断敏感率12.5%。 CBCT在腭根横折中诊断敏感度为91.7%,X线片诊断敏感率为63.6%, CBCT敏感度均高于X线片(P<0.01)。结论上颌磨牙腭根折裂的临床诊断中,CBCT诊断的敏感度显著高于X线根尖片,且CBCT能准确判断折裂位置、方向及角度,具有更高的临床应用价值。

Cone beam CT application in the diagnosis of maxillary molars palatal root fracture

Objective To compare the periapical X-ray and cone beam CT ( CBCT) in the diagnosis of maxillary molars palatal root fracture. Methods Twenty-five patients of suspected transverse fold and 9 patients of longitudinal split of the palatal root were included in this study. Periapical X-ray and cone beam CT were taken, respectively. The diagnosis was made according to the periapical X-ray and CBCT results respectively, and compared with the results after the tooth extraction or during the operation. Results CBCT sensitivity was 87. 5% and periapical X-ray 12. 5% in the diagnosis of longitudinal split. CBCT sensitivity was 91. 7% and X-ray 63. 6 % in the diagnosis of transverse fracture (P <0. 01). Conclusion The sensitivity of CBCT was significantly higher than that of X-ray film in the diagnosis of maxillary molars palatal root fracture.