Eskandarloo Amir, Karkehabadi Hamed, Hoseini Hashemi Seyedeh Zeinab, Ahmadi Masoumeh, Hendi Seyedeh Sareh
Department of Radiology, Dental School, Hamedan University of Medical Science, Hamadan, Iran.
General Dentist, Hamadan, Iran.
Iran Endod J. 2017 Spring;12(2):236-241.
The aim of this study was to assess the radiographic technical quality of root canal therapy performed by fifth year students of Dental School of Hamadan University of Medical Sciences from 2015 to 2016.
Four hundred and seventy records of root canal therapies were evaluated. Records with graphies taken as initial, master apical file (MAF), master apical cone (MAC) and final radiographs were included in the study and records of patient younger than 16 years and older than 68 years were excluded from further investigations. Lastly, 432 teeth were selected. Obturation length, canal tapering, quality and density of filling material were the variables investigated in the present study. Two independent investigators examined the radiographies using a magnifying lens (×2) and x-ray viewer. Data were analyzed using chi-square test.
The technical quality of root filling performed by undergraduate dental students was classified as acceptable in 10.4% of cases. Moreover, 70.8% of teeth had adequate filling, 17.1% were underfilled and 12% were overfilled. The three groups were significantly different in terms of working length and taper quality. One hundred ninety four (44.9%) records had adequate taper and 109 (25%) records had adequate density. There was a significant association between teeth location and the length of obturation so that the probability of a successful treatment was higher in maxillary teeth. Furthermore, the rate of a proper length of obturation was higher among incisors than that of premolars and molars.
The technical quality of root canal therapy performed by dental students in Hamadan University of medical sciences is not as acceptable as it should be. One of the most important factors in this regard is a high student/professor ratio.
本研究旨在评估2015年至2016年哈马丹医科大学牙科学院五年级学生进行根管治疗的放射技术质量。
评估了470份根管治疗记录。纳入研究的记录包括初始、主尖锉（MAF）、主尖牙胶尖（MAC）和最终X线片，16岁以下和68岁以上患者的记录被排除在进一步研究之外。最后，选择了432颗牙齿。本研究调查的变量包括充填长度、根管锥度、充填材料的质量和密度。两名独立研究者使用放大镜（×2）和X线观片灯检查X线片。数据采用卡方检验进行分析。
本科牙科学生进行的根管充填技术质量在10.4%的病例中被归类为可接受。此外，70.8%的牙齿充填充分，17.1%充填不足，12%充填过度。三组在工作长度和锥度质量方面有显著差异。194份记录（44.9%）锥度合适，109份记录（25%）密度合适。牙齿位置与充填长度之间存在显著关联，上颌牙齿治疗成功的概率更高。此外，切牙的合适充填长度率高于前磨牙和磨牙。
哈马丹医科大学牙科学生进行的根管治疗技术质量不如应有的那样可接受。这方面最重要的因素之一是学生与教授的比例过高。
