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目的:对比数字化X线牙片与CBCT对牙根纵裂的诊断价值。方法:以济南市口腔医院口腔内科的50例牙根纵裂患者为研究对象。将患者分别定义为观察组和对照组。对照组行数字化X线牙片检查,观察组行CBCT检查。分别根据X线片诊断标准和CT诊断标准对影像学检查结果做出独立判断。再根据牙根纵裂临床诊断金标准分别对X线根尖片的诊断结果和CBCT检查的诊断结果进行比较,得出两组真阳性(TP)、假阳性(FP)、真阴性(TN)、假阴性(FN),计算敏感性、特异性、阳性预测值、阴性预测值。结果:牙根纵裂临床诊断金标准判断结果显示:本组50例患者中,牙齿纵裂确定46例,排除4例。X线根尖片检查诊断牙根纵裂的敏感度为77%,特异性为75%,阳性检出率为96.88%,阴性检出率为16.67%;CBCT诊断牙根纵裂的敏感度为95.65%,特异性为100%,阳性检出率为100%,阴性检出率为66.67%。CBCT扫描诊断牙根纵裂的敏感度、特异性、阳性检出率明显大于X线根尖检查(P<0.01)。CBCT扫描诊断牙根纵裂的阳性检出率大于X线根尖片检查(P<0.05)。结论:在牙根纵裂的临床诊断中,CBCT诊断的敏感度、特异性、阳性检出率、阴性检出率均高于X线牙片,具有更高的临床应用价值。
Objective: To compare the diagnostic value of digitized X-ray and CBCT on root rupture. Methods: Forty patients with root fracture of oral cavity in Jinan Stomatological Hospital were studied. Patients were defined as observation group and control group. Control group digitized X-ray examination, observation group CBCT examination. According to X-ray diagnostic criteria and CT diagnostic criteria for imaging findings to make independent judgments. The diagnostic results of X-ray and CBCT were compared respectively according to the clinical diagnostic gold standard of root longitudinal splitting. The results showed that the positive rate (TP), false positive rate (FP), true negative rate (TN) False negative (FN), calculated sensitivity, specificity, positive predictive value, negative predictive value. Results: The clinical diagnosis of radicular rupture gold standard judgment results showed that: the group of 50 patients, 46 cases of tooth rupture identified, excluding 4 cases. The sensitivity of radiographic examination was 77%, the specificity was 75%, the positive detection rate was 96.88%, the negative detection rate was 16.67%. The sensitivity of CBCT in diagnosing root fracture was 95.65% , The specificity was 100%, the positive detection rate was 100%, the negative detection rate was 66.67%. Sensitivity, specificity and positive detection rate of CBCT in the diagnosis of root fracture were significantly higher than those in X-ray apical (P <0.01). CBCT scan diagnosis of root longitudinal cleft positive rate was higher than X-ray examination (P <0.05). Conclusion: The sensitivity, specificity, positive detection rate and negative detection rate of CBCT in the diagnosis of root fracture are higher than those of X-ray, which has a higher clinical value.