E-ISSN 2548-0839
Factors Affecting the Outcome of Non-Surgical Endodontic Treatments Performed by Undergraduate Students in a Greek Dental School []
. 2018; 3(2): 93-100 | DOI: 10.14744/eej.2018.18291

Factors Affecting the Outcome of Non-Surgical Endodontic Treatments Performed by Undergraduate Students in a Greek Dental School

Nikolaos K. Polyzos1, Kyriakos G. Sarris1, Afroditi I. Pita2, Georgios V. Mikrogeorgis1, Kleoniki M. Lyroudia1
1Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
2Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, United States

Objective: To evaluate the outcome of initial endodontic treatments performed by undergraduate students in a Greek dental school and to determine the factors that may impact the treatment outcome.
Methods: From a randomly selected sample of 677 non-surgical endodontic treatments performed between 2012 and 2015, follow-up appointments were scheduled with patients whose dental records matched the inclusion criteria. After clinical and radiographic examination, the treatment outcome was classified as ‘success’ (healed/healing) or ‘failure’ (uncertain/unsatisfactory healing). The statistical analysis of the data was performed using generalized estimating equations. Intra-examiner and inter-examiner agreements were checked with the intraclass correlation coefficient and with Cohen’s kappa. The statistical significance level was set at p<0.05.
Results: A total of 244 teeth (349 roots) were included for further analysis, and the mean follow-up period was 2.8 years. Overall, the success rate for the treated roots was 72.8%. Μultivariate analysis revealed four decisive factors as having a positive impact on the outcome, namely, the absence of voids within the root fillings (p<0.001), the absence of pre-operative periapical lesions (p=0.001), the extension of the root filling material by 0-2 mm from the radiographic apex (p<0.001) and the root type (anterior roots: p=0.015 and premolar roots: p=0.011). The association of gender, arch, pulp status and type of coronal restoration with the outcome was not statistically significant (p>0.05). Moreover, when the outcome according to pre-operative periapical status and the technical variables of root fillings (apical extension and density) was investigated, roots without periapical lesion, with a root filling material extended 0-2 mm within the apex and without voids revealed the highest success rate (94.5%).
Conclusion: The success rate of non-surgical endodontic treatments performed in a Greek dental school was in the range of those reported in other studies. The pre-operative periapical status, technical variables of root fillings (apical extension and density) and root type were regarded as significant prognostic factors of the outcome.

Keywords: Endodontic treatment, outcome, undergraduate students, dental school

Nikolaos K. Polyzos, Kyriakos G. Sarris, Afroditi I. Pita, Georgios V. Mikrogeorgis, Kleoniki M. Lyroudia. Factors Affecting the Outcome of Non-Surgical Endodontic Treatments Performed by Undergraduate Students in a Greek Dental School. . 2018; 3(2): 93-100

Corresponding Author: Nikolaos K. Polyzos, Greece

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