Effect of smear layer and root-end cavity thickness on apical sealing ability of MTA as a root-end filling material: a bacterial leakage study

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
Tahsin YildirimAhmet Serper

Abstract

The aim of this study was to investigate the effect of the cavity thickness and smear layer on apical sealing ability of mineral trioxide aggregate (MTA) as a root-end filling material. Seventy single-rooted maxillary central teeth were used in this study. All teeth were instrumented to size 50 using a step-back technique. The selected teeth were randomly divided into 4 groups, each containing 15 experimental samples and 5 positive and 5 negative control samples. In the first and second groups (smear+), the teeth were irrigated with only 5.25% NaOCl. In the third and fourth groups (smear-), the teeth were irrigated with 17% EDTA and 5.25% NaOCl to remove the smear layer. Also, in the first and third groups, cavities were prepared as 3 mm. In the second and fourth groups, cavities were prepared as 5 mm. All the root-end cavities were then filled with MTA. Nail varnish was applied to all external root surfaces to the level of the resected root-ends to prevent lateral microleakage. Samples were sterilized in an ethylene oxide sterilizer for 12 hours. The apical 3-4 mm of the roots were immersed in brain heart infusion culture medium with phenol red indicator within culture chambers. The coronal access of each specimen was inoculat...Continue Reading

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Citations

Sep 17, 2013·Journal of Applied Oral Science : Revista FOB·Josiane de AlmeidaWilson Tadeu Felippe
May 28, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Ahmad M El-Ma'aitaDavid C Watts
Apr 21, 2012·Journal of Endodontics·Erick Y SatoChristine M Sedgley
Jan 23, 2015·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Pranali PatilAndre Mickel
Nov 28, 2013·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Noushin ShokouhinejadAhmad Reza Shamshiri
Jan 12, 2013·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Ahmad M EL-Ma'aitaDavid C Watts
Mar 9, 2017·Microscopy Research and Technique·Selen Küçükkaya ErenCem Şahin
Nov 14, 2017·Microscopy Research and Technique·Nidambur Vasudev BallalKishore Ginjupalli
Mar 26, 2021·International Endodontic Journal·R F ZancanJ Camilleri

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