The Effectiveness of Laser-Activated Irrigation on the Apical Microleakage Qualities of MTA Repair HP and NeoMTA Plus in Simulated Immature Teeth: A Comparative Study.

Serenad Çırakoğlu,Aylin İslam,Buket Baddal

doi:10.3390/ma13153287

Abstract

There are limited data regarding the potential effect of erbium, chromium: yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser-activated irrigation (LAI) on the microleakage qualities of calcium silicate-based cements. The objective of the present study was to assess the effect of LAI on the microleakage qualities of MTA Repair HP (MTA-HP) and NeoMTA Plus (Neo) used in root-end filling and to compare the antimicrobial effectiveness of MTA- HP. Two experimental sets were conducted: antimicrobial activity (agar diffusion test/at 24, 48 h) and microleakage (glucose leakage model/at 1st, 10th, 20th days). Antimicrobial activities of MTA-HP, Neo, Biodentine, ProRoot and MTA Angelus were evaluated, and inhibition zones were observed not only against a range of Gram-positive and Gram-negative bacteria but also against yeast at 48h. For microleakage evaluation, fifty teeth were prepared to simulate the clinical situation where the root-tips (apex) are open, and randomly divided into two experimental groups (n = 20/group) according to the cement type (MTA-HP and Neo), and two control (n = 5/group) groups. Each experimental group was further divided into two subgroups (n = 10/group) with respect to LAI: MTA-HP, L-HP, Neo, L-Neo. A statistical difference was only detected between Neo and L-HP groups on day 1. Subsequently, MTA-HP exhibited superior microleakage quality compared to Neo in the short-term. Er,Cr:YSGG laser-activated irrigation could be used as a reliable technique without creating adverse effects on the sealing abilities of MTA Repair HP and NeoMTA Plus.

Highlights

Three or more years are required for the development and apical closure of permanent teeth after eruption [1]
The liquid state of this product is obtained by the addition of an organic plasticizer into distilled water [13,14]. These bioactive materials are mainly recommended for the dental pulp treatments, apexification, apexogenesis, root-end filling and repair of root canal resorption [15]
Agar diffusion test was conducted to evaluate the antimicrobial activity of mineral trioxide aggregate (MTA) Repair

Summary

Introduction

Three or more years are required for the development and apical closure of permanent teeth after eruption [1]. Traumatic injuries and severe caries within this critical period commonly result in pulpal necrosis and periapical periodontitis [1]. In this situation, major drawbacks associated with traditional root canal treatments arise, consisting of fractures or inadequate apical seal due to thin dentinal walls and wide-open apices [2,3]. The apexification method is extensively used for an incomplete root in teeth with necrotic pulp. Thereby, calcified tissue was apically formed to provide more suitable conditions for traditional root canal filling and to remove the risk of the over-extension of root canal filling to the periapical tissues [4]. CH has proven to be highly successful in Materials 2020, 13, 3287; doi:10.3390/ma13153287 www.mdpi.com/journal/materials

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