Abstract
Objective. To evaluate the influence of titanium tetrafluoride (TiF4) incorporation on the physicochemical and antibacterial properties of Biodentine (BD; Septodont, Saint Maur des Fausses, France) as an intraorfice barrier material.
Methods. Three different proportions of TiF4 powder were used with BD; 1 wt%, 2 wt%, and 3 wt%; respectively. BD without TiF4 addition was used as the control group. The setting time (ST) was determined using Gillmore needle apparatus. Diametral tensile strength (DTS) and fracture resistance were measured in a universal testing machine. Solubility was assessed using mass variation after 7 days water storage. The hardness test was conducted using Vickers microhardness tester. The antibacterial activity was assessed using direct contact test against Enterococcus faecalis. Radiopacity was assessed and expressed in thickness of aluminum. Surface topography and elemental composition of modified BD were also assessed. The pH of soaking water was measured up to 168h. Data of tested properties were analyzed using one-way analysis of variance, the paired t-test, two-way repeated measures analysis of variance, and Tukey post hoc tests (P < 0.05).
Results. BD-incorporating 2 wt% TiF4 revealed the highest surface microhardness, DTS, and fracture resistance compared with the unmodified group (P < 0.001). Higher concentrations of TiF4 (3 wt%) compromised the solubility and prolonged the ST of BD (P < 0.05). Bacterial growth of BD-incorporating TiF4 was significantly reduced when compared with the control group (P < 0.05). The tested materials induced alkalization of the soaking water that decreased with time.
Significance. Biodentine-incorporating TiF4 (1 wt% and 2 wt%) is a promising intraorfice barrier material with enhanced physicochemical and antibacterial properties. (C) 2018 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.