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International Journal of Dentistry
Volume 2018 (2018), Article ID 2327854, 5 pages
Research Article

Relationship between the Apical Preparation Diameter and the Apical Seal: An In Vitro Study

1Department of Conservative Dentistry and Endodontics, School of Dentistry of Casablanca, Casablanca, Morocco
2Private Practice, Casablanca, Morocco

Correspondence should be addressed to Sara Dhoum

Received 17 August 2017; Accepted 30 October 2017; Published 10 January 2018

Academic Editor: Izzet Yavuz

Copyright © 2018 Kaoutar Laslami et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. The aim of the study is to define the relationship between the apical preparation diameter and the apical sealing ability to highlight the importance of the preservation of the diameter and the original position of the apical foramen. Materials and Methods. 50 extracted maxillary incisors were randomly allocated into three groups of 15 teeth each (n = 15) according to the apical preparation size: Group 1: finishing file F1 corresponding to size 20 reached the working length (ProTaper Universal system Dentsply®); Group 2: prepared up to size 30 corresponding to finishing file F30; Group 3: prepared up to size 50 corresponding to finishing file F5. Five teeth were assigned to positive and negative control groups. After the filling of the root canals, the teeth were isolated and immersed in a dye solution, then cut longitudinally, photographed, and the dye penetration were calculated using a computer software. Results. Comparison of the three different apical preparation sizes showed no statistically significant differences regarding the apical microleakage. Conclusion. The most important value of the dye penetration was observed in the group with the largest apical diameter.