Department of Restorative Dental Sciences, Dental College, King Saud University, Riyadh, Saudi Arabia.
Int Endod J. 2010 Apr;43(4):292-300. doi: 10.1111/j.1365-2591.2009.01679.x.
To evaluate the technical quality of root fillings performed in the undergraduate clinic of the Dental College, King Saud University, Saudi Arabia and to compare the technical quality of root canal treatment between the 4th- and 5th-year students.
A random sample of 710 records of patients who had received dental treatment by undergraduate students at the College of Dentistry (Malaz University Campus), between the years of 2005-2008, was investigated. The final sample consisted of 550 root filled teeth in 459 patients. For each root filled tooth, at least three periapical radiographs were examined: preoperative, working length determination and postoperative. The length, density and taper of root fillings, as well as the presence of procedural errors, were recorded. 'Acceptable' filling quality was defined as having adequate length, density and taper with the absence of any procedural error. Results were evaluated statistically using chi-square test.
One hundred and twenty-five of 550 root filled teeth (23%) had a root filling that was classified as 'acceptable'. There was no statistical significant association between the 4th- and 5th-year students in terms of length (P = 0.134), density (P = 0.081) and taper (P = 0.590). Seventy-five (14%) treated teeth had ledges, 40 (7%) had apical transportation and 37 (7%) had apical root perforation. Ledges had significant association with the level of student (P < 0.0001) and were greater in the cases of 4th-year students (18%) compared to the 5th-year students (8%), whilst root perforations had also significant association with level of students (P = 0.016) and were more in the 5th-year cases (3%) compared to the 4th-year cases (0.3%).
The technical quality of root fillings placed by undergraduate dental students was classified as 'acceptable' in 23% of cases. There was little difference between 4th- and 5th-year students in the overall quality of root fillings.
评估沙特阿拉伯沙特国王大学牙科学院本科生诊所进行的根管填充技术质量，并比较第四年和第五年学生根管治疗的技术质量。
对 2005 年至 2008 年间在牙科学院（马拉兹大学分校）接受本科生治疗的 710 名患者的记录进行了随机抽样调查。最终样本包括 459 名患者的 550 个根管填充牙齿。对于每个根管填充牙齿，至少检查了三张根尖周射线照片：术前、工作长度确定和术后。记录根管填充的长度、密度和锥度以及操作错误的存在。“可接受”的填充质量定义为具有足够的长度、密度和锥度，并且不存在任何操作错误。使用卡方检验对结果进行统计学评估。
在 550 个根管填充牙齿中，有 125 个（23%）被归类为“可接受”。第四年和第五年学生在长度（P = 0.134）、密度（P = 0.081）和锥度（P = 0.590）方面没有统计学显著关联。75 个（14%）治疗牙齿有肩台，40 个（7%）有根尖运输，37 个（7%）有根尖穿孔。肩台与学生水平有显著关联（P < 0.0001），第四年学生（18%）比第五年学生（8%）更常见，而根穿孔也与学生水平有显著关联（P = 0.016），第五年学生（3%）比第四年学生（0.3%）更常见。
本科生根管填充的技术质量在 23%的病例中被归类为“可接受”。第四年和第五年学生的根管填充总体质量差异不大。
