title: Radiographic quality of root canal treatment performed by 6(th) year undergraduate students in Mashhad, Iran.
abstract: BACKGROUND
  The aim of the present study was to investigate the quality of root canal obturation performed by 6(th) year undergraduate dental students at the Dental School, University of Mashhad, Iran.
  
  
  METHODS
  A random 200 sample records of patients who received endodontic treatment at the Dental School, University of Mashhad between 2009 and 2010 was investigated. The quality of root canal filling was determined in relation to the adequate density and length of root filling. Statistical analysis of the data was carried out using statistical package for the social sciences (SPSS 12.0, SPSS Inc., Chicago, IL, USA) with Chi-square test. P < 0.05 was considered as significant.
  
  
  RESULTS
  About 38% of teeth fulfilled the criteria of an acceptable root canal filling. Adequate length and density of root filling was found in 73% and 66% of teeth respectively. There was significant difference between maxillary and mandibular teeth according to the quality (P = 0.009), length (P = 0.039) and density (P = 0.005) of root filling. The frequency of root canals with an acceptable filling was significantly greater in the anterior teeth than in molars.
  
  
  CONCLUSIONS
  The technical quality of root canal treatment performed by undergraduate dental students was found to be less than ideal. Thus, the training course of the students at the preclinic and clinic has to be revised.
authors.affiliation: Dental Material Research Center, Department of Endodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Moradi
authors.affiliation: Dental Research Center, Department of Endodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Gharechahi
keywords: Dental student education; periapical radiograph; root canal treatment; undergraduate student
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