Physical properties and hydration behavior of a fast-setting bioceramic endodontic material

Ya-Juan Guo,Zhe-Jun Wang,Hong-Bo Li,Christophe Mobuchon,Tian-Feng Du,Jingzhi Ma,Ahmed Hieawy,Ya Shen,Markus Haapasalo,Yan Yang

doi:10.1186/s12903-016-0184-1

Abstract

BackgroundTo investigate the physical properties and the hydration behaviour of the fast-setting bioceramic iRoot FS Fast Set Root Repair Material (iRoot FS) and three other endodontic cements.MethodsiRoot FS, Endosequence Root Repair Material Putty (ERRM Putty), gray and white mineral trioxide aggregate (G-MTA & W-MTA), and intermediate restorative material (IRM) were evaluated. The setting time was measured using ANSI/ADA standards. Microhardness was evaluated using the Vickers indentation test. Compressive strength and porosity were investigated at 7 and 28 days. Differential scanning calorimetry (DSC) was employed for the hydration test.ResultsiRoot FS had the shortest setting time of the four bioceramic cements (p < .001). The microhardness values of iRoot FS, ERRM Putty and MTA increased at different rates over the 28 days period. At day one, ERRM Putty had the lowest microhardness of the bioceramic cements (p < .001), but reached the same level as MTA at 4, 7 and 28 days. The microhardness of iRoot FS was lower than that of W-MTA at 7 and 28 days (p < .05). The porosity of the materials did not change after 7 days (p < .05). The compressive strength values at 28 days were significantly greater for all bioceramic groups compared to those at 7 days (p < .01). ERRM Putty had the highest compressive strength and the lowest porosity of the evaluated bioceramic cements (p < .05), followed by iRoot FS, W-MTA, and G-MTA, respectively. DSC showed that iRoot FS hydrated fastest, inducing an intense exothermic reaction. The ERRM Putty did not demonstrate a clear exothermic peak during the isothermal calorimetry test.ConclusionsiRoot FS had a faster setting time and hydrating process than the other bioceramic cements tested. The mechanical properties of iRoot FS, G-MTA and W-MTA were relatively similar.

Highlights

To investigate the physical properties and the hydration behaviour of the fast-setting bioceramic iRoot FS Fast Set Root Repair Material and three other endodontic cements
The long setting time is one of the potential drawbacks of hydraulic calcium silicate-based cement (HCSC) and Calcium phosphate silicate cement (CPSC), two appointments are required with a related increase in chairside time
There was no significant difference in the initial and final setting time between ERRM Putty and G-mineral trioxide aggregate (MTA)

Summary

Introduction

To investigate the physical properties and the hydration behaviour of the fast-setting bioceramic iRoot FS Fast Set Root Repair Material (iRoot FS) and three other endodontic cements. The first hydraulic calcium silicate-based cement (HCSC) patented for endodontic applications was mineral trioxide aggregate (MTA; Dentsply Tulsa Dental Specialties, Johnson City, TN, USA) [1]. As examples of CPSCs [13], Endosequence Root Repair Material Putty (ERRM Putty; Brasseler USA, Savannah, GA, USA) and Endosequence Root Repair Material Paste (ERRM Paste; Brasseler, USA) have been developed as ready-to-use, premixed bioceramic materials Their major inorganic components include C3S, C2S, and calcium phosphates. Because the material is premixed with nonaqueous but water-miscible carriers, it will not set during storage and hardens only on exposure to an aqueous environment [14] Both ERRM Putty and Paste have reasonably good handling properties; their working time is more than 30 min and their setting time is 4 h [15]. The long setting time is one of the potential drawbacks of HCSCs and CPSCs, two appointments are required with a related increase in chairside time

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