锥形束CT与数字化根尖片对C型根管充填效果的评价

目的：比较锥形束CT（CBCT）与数字化根尖片对下颌第二磨牙C型根管充填效果的评价，探讨CBCT在C型根管充填效果评价中的优势及应用价值。方法：选取在温州医科大学附属口腔医院进行下颌第二磨牙根管治疗的患者82例（患牙86颗），根管治疗充填后拍摄CBCT与数字化根尖片，术后由2位高年资医师对根管充填效果进行评价，比较根管充填恰填率和充填材料与根管壁间的致密度，采用χ2检验比较2种评价方法是否具有差异性。结果：采用同样的根管预备和根管充填方法，不同的术后评价方法结果差异较明显，在根管充填长度和充填材料致密度评价方面，CBCT的检测能力明显优于根尖片，差异有统计学意义（P＜0.05）。结论：CBCT较数字化根尖片在评价下颌第二磨牙C型根管的充填效果方面可信度更高，在解剖复杂的根管系统评价中具有广泛应用价值。

An evaluation of the quality of c-shaped root canal obturation using cone-beam CT and digital periapical radiography

Objective: To compare the quality of root canal obturation of C-shaped canal in mandibular second molar by using cone beam computerized tomography (CBCT) and digital periapical radiography (DPR) to assess the advantages and application value of CBCT in C-shaped root canal obturation. Methods: A total of 82 patients (86 mandibular second molars) received root canal therapy in endodontics department. After root canal obturation, the length and density of root filling were assessed with CBCT and DPR simultaneously by two experienced endodontists. Chi-square test was performed to compare the difference between CBCT and DPR in evaluating the quality of the root obturation. Results: With the same root canal preparation and obturation methods, the results varied significantly due to different postoperative evaluation methods. In terms of length and density of root obturation, CBCT was significantly better than of DPR (P<0.05). Conclusion: CBCT is more reliable than DPR in evaluating the obturation quality of C-shaped root canal in mandibular second molar, and has extensive application value in the evaluation of anatomic complex root canal system.