Keywords :
Compressive strength, Diametrical tensile strength, Mineral trioxide aggregate, Setting time, Surface hardness, Titanium tetrafluoride
Citation Information :
Suganthakumar P, Reddy TV, Venkatesh V, Chellapandian K, Krishnan M. The Effect of Titanium Tetrafluoride on Physical Properties on Mineral Trioxide Aggregate: An In Vitro Study. World J Dent 2024; 15 (10):862-868.
Aim: The study aimed to compare and evaluate the physical properties, such as compressive strength, diametral tensile strength, setting time, and surface hardness of mineral trioxide aggregate (MTA) after the incorporation of titanium tetrafluoride.
Materials and methods: A total of 196 samples were made, comprising (n = 49) group I: MTA; group II: MTA with 1% TiF4; group III: MTA with 2% TiF4; group IV: MTA with 3% TiF4. The specimens were prepared using stainless steel molds of recommended dimensions for testing the physical properties considered. While the compressive strength (MPa) and the diametral tensile strength (MPa) were evaluated using a universal testing machine, setting time (minute) was measured using a Gillmore needle, and surface hardness (VHN) was measured using a Vickers microhardness tester. Data were collected at two different time periods, day 1 and day 21, for the tests except for surface hardness, and were statistically analyzed. The level of statistical significance was determined at p ≤ 0.05.
Results: The mean values on day 21 were found to be highest in group IIIa for compressive strength (50.28 ± 0.48 MPa), diametral tensile strength (8.21 ± 0.12 MPa), and surface hardness (34.31 ± 0.99 VHN), while the shortest setting time was in group Ic (155.00 ± 0.81 minutes) and the longest time was in group IVc (162.42 ± 1.27 min). The mean difference between the four groups was found to be statistically significant (p < 0.05).
Conclusion: MTA, when incorporated with 1 wt% and 2 wt% TiF4, showed enhanced physical properties, whereas the addition of 3 wt% TiF4 to MTA compromised the mechanical properties and prolonged the setting time.
Clinical significance: Continuous advancement in the field of dental materials has revolutionized the field of dentistry. MTA, a widely used material, possesses several advantages over its precursors. However, it is limited by several challenges, such as discoloration, longer setting time, and decreased compressive and flexural strength. Hence, to address these setbacks, the addition of materials to positively alter the physical and chemical properties of MTA can be attempted for better clinical practice.
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