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目的 :评价口腔曲面体层片判断上颌牙根突入上颌窦的敏感度与特异度。方法 :纳入110例患者,男42例,女68例;年龄15~36岁,上颌第二磨牙已完全萌出,拍摄全牙列锥形束CT(CBCT)及口腔曲面体层片。分别根据2种影像数据观察上颌尖牙、上颌第一前磨牙、上颌第二前磨牙、上颌第一磨牙及上颌第二磨牙牙根是否突入上颌窦。以CBCT观察结果为金标准,收集四格表资料,计算口腔曲面体层片进行判断的敏感度、特异度、准确度、阳性似然比、阴性似然比及牙根进入上颌窦的发生率。结果:口腔曲面体层片判断牙根是否突入上颌窦的敏感度分别为上颌尖牙100%,上颌第一前磨牙100%,上颌第二前磨牙96%,上颌第一磨牙99%,上颌第二磨牙96%。特异度分别为上颌尖牙94%,上颌第一前磨牙92%,上颌第二前磨牙84%,上颌第一磨牙55%,上颌第二磨牙67%。结论:口腔曲面体层片判断上颌牙根是否进入上颌窦的敏感度高,但是对于第二前磨牙、第一磨牙及第二磨牙判断的特异度较低。正畸临床不能以之作为上颌后牙支抗设计的依据。
OBJECTIVE: To evaluate the sensitivity and specificity of oral curved lamina in determining the maxillary sinus root protrusion. Methods: A total of 110 patients were enrolled, including 42 males and 68 females. Aged 15-36 years old, the second maxillary molars had been completely erupted. All-dentition cone beam computed tomography (CBCT) and oral curvilinear slices were taken. The maxillary canines, the maxillary first premolar, the maxillary second premolar, the maxillary first molar and the maxillary second molar were observed respectively according to the two kinds of imaging data. The CBCT observation results as the gold standard, collecting four grid table data, calculate the sensitivity, specificity, accuracy, positive likelihood ratio, negative likelihood ratio and the incidence of root into the maxillary sinus to determine the oral curved body slice. Results: The sensory of stomatal slice to maxillary sinus was 100% for maxillary canine, 100% for maxillary first premolar, 96% for maxillary second premolar, 99% for maxillary first molars and second for maxillary second Molar 96%. The maxima were 94%, maxillary first premolar 92%, maxillary second premolar 84%, maxillary first molar 55% and maxillary second molar 67%. CONCLUSION: The sensitivity of the oral cavity slice to determine whether the maxillary root enter the maxillary sinus is high, but the second molar is lower than the first molar and the second molar. Orthodontics can not be used as the basis for maxillary posterior dental support design.