Effect of titanium tetrafluoride addition on the physicochemical and antibacterial properties of Biodentine as intraorfice barrier

• Published in: Dental materials Vol. 35; no. 1; pp. 185 - 193
• Main Authors: Elsaka, Shaymaa E., Elnaghy, Amr M., Mandorah, Ayman, Elshazli, Alaa H.
• Format: Journal Article
• Language: English
• Published: England Elsevier Inc 01-01-2019; Elsevier BV
• Subjects: Alkalizing; Aluminum; Antibacterial; Antibacterial activity; Barriers; Biodentine; Chemical composition; Dentistry; Diamond pyramid hardness tests; Fracture toughness; Intraorfice barrier; Physicochemical properties; Powder; Properties (attributes); Radiopacity; Soaking; Solubility; Titanium; Titanium tetrafluoride; Ultrasonic testing; Variance analysis; Water hardness; Water storage; Titanium tetrafluoride; Biodentine; Intraorfice barrier; Antibacterial; Radiopacity; Physicochemical properties
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/j.dental.2018.11.019

To evaluate the influence of titanium tetrafluoride (TiF4) incorporation on the physicochemical and antibacterial properties of Biodentine (BD; Septodont, Saint Maur des Faussés, France) as an intraorfice barrier material.
Three different proportions of TiF4 powder were used with BD; 1wt%, 2wt%, and 3wt%; 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 7days 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).
BD-incorporating 2wt% TiF4 revealed the highest surface microhardness, DTS, and fracture resistance compared with the unmodified group (P<0.001). Higher concentrations of TiF4 (3wt%) 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.
Biodentine-incorporating TiF4 (1wt% and 2wt%) is a promising intraorfice barrier material with enhanced physicochemical and antibacterial properties.