Disodium hydrogen phosphate, Mineral trioxide aggregate, Setting time.
Citation Information :
Mokhtari H, Rahbar M, Lotfi M, Mozafari A, Badri-Nozadi M, Mokhtari-Zonouzi H. Comparison of Setting Time of White Mineral Trioxide Aggregate with and without Disodium Hydrogen Phosphate at Different Liquid-to-powder Ratios. J Contemp Dent Pract 2018; 19 (8):988-991.
Aim: The present study was conducted with the objective of evaluating the effect of different liquid-to-powder ratios on setting time of white mineral trioxide aggregate (WMTA) and the effect of adding disodium hydrogen phosphate (Na2HPO4) to white MTA (NAMTA).
Materials and methods: Sixty samples were prepared in plastic annular molds with a diameter of 10 mm and a height of 2 mm in order to record setting time where white MTA was placed in 30 samples and 2.5 wt% mixture of Na2HPO4 with white MTA was placed in other 30 samples. Setting times in different ratios of liquid to powder (50, 60, and 70%) and at different times including 5, 10, 15, 20, 25, 30, 40, and 50 minutes as well as 1, 1.5, 2.5, 3, 3.5, and 4 hours were measured with Vicat. Statistical Package for the Social Sciences version 16 software was used to examine the differences between groups. The values of p < 0.05 were considered to be statistically significant in this study.
Results: The average setting time of samples in two WMTA and NAMTA was 182.17 ± 57.86 and 67.00 ± 14.42 respectively, and this difference was statistically significant (p < 0.001). Also, the average setting time of samples in ratio groups of 50, 60, and 70% were 146.00 ± 75.90, 85.00 ± 31.71, and 142.5 ± 64.47 respectively, and results showed that there was no significant difference between groups.
Conclusion: Adding 2.5 wt% of Na2HPO4 mixture to white MTA reduces the setting time, which is lower than the WMTA in 50, 60, and 70% liquid-to-powder ratios.
Clinical significance: According to the findings of this study, it can be seen that adding Na2HPO4 to white MTA is a good way to reduce setting timing in clinical dentistry, especially in one-visit treatments.
Rahimi S, Mokhtari H, Shahi S, Kazemi A, Asgary S, Eghbal MJ, Mesgariabbasi M, Mohajeri D. Osseous reaction to implantation of two endodontic cements: Mineral trioxide aggregate (MTA) and calcium enriched mixture (CEM). Med Oral Patol Oral Cir Bucal 2012 Sep;17(5):e907-e911.
Vosoughhosseini S, Lotfi M, Shahmoradi K, Saghiri MA, Zand V, Mehdipour M, Ranjkesh B, Mokhtari H, Salemmilani A, Doosti S. Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching. Med Oral Patol Oral Cir Bucal 2011 Nov;16(7):e1017-e1021.
Yaltirik M, Ozbas H, Bilgic B, Issever H. Reactions of connective tissue to mineral trioxide aggregate and amalgam. J Endod2004 Feb;30(2):95-99.
Zand V, Lotfi M, Aghbali A, Mesgariabbasi M, Janani M, Mokhtari H, Tehranchi P, Pakdel SM. Tissue reaction and biocompatibility of implanted mineral trioxide aggregate with silver nanoparticles in a rat model. Iran Endod J 2016 Winter; 11(1):13-16.
Vosoughhosseini S, Lotfi M, Shahi S, Baloo H, Mesgariabbasi M, Saghiri MA, Zand V, Rahimi S, Ranjkesh B. Influence of white versus grey mineral trioxide aggregate on inflammatory cells. J Endod 2008 Jun;34(6):715-717.
Shahi S, Rahimi S, Lotfi M, Yavari H, Gaderian A. A comparative study of the biocompatibility of three root end filling materials in rat connective tissue. J Endod 2006 Aug;32(8): 776-780.
Shahi S, Ghasemi N, Rahimi S, Yavari H, Janani M, Mokhtari H, Bahari M, Rabbani P. The effect of different mixing methods on working time, setting time, dimensional changes and film thickness of mineral trioxide aggregate and calcium-enriched mixture. Iran Endod J 2015 Fall;10(4):248-251.
Islam I, Chng HK, Yap AU. X-ray diffraction analysis of mineral trioxide aggregate and Portland cement. Int Endod J 2006 Mar;39(3):220-225.
Kagan P, He J, Glickman GN, Watanable I. The effects of various additives on setting properties of WMTA. J Endod 2006 Jun;32(6):569-572.
Ding SJ, Kao CT, Shie MY, Hung C Jr, Huang TH. The physical and cytological properties of white MTA mixed with Na2HPO4 as an accelerant. J Endod 2008 Jun;34(6):748-751.
Anand S, Taneja S, Kumari M. Effect of accelerants on the immediate and the delayed sealing ability of mineral trioxide aggregate when used as an apical plug: an in vitro study. J Conserv Dent 2014 Jan;17(1):45-48.
Mokhtari H, Jafarizadeh S, Mokhtari Zonouzi HR, Lotfi M, Forough Reyhani M, Sohrabi A. Bond strength of white mineral trioxide aggregate with and without disodium hydrogen phosphate with different liquid-to-powder ratios. Iran Endod J 2017 Summer;12(3):293-297.
Lotfi M, Vosoughhosseini S, Saghiri MA, Mesgariabbasi M, Ranjkesh B. Effect of white mineral trioxide aggregate mixed with disodium hydrogen phosphate on inflammatory cells. J Endod 2009 May;35(5):703-705.
Fridland M, Rosado R. Mineral trioxide aggregate (MTA) solubility and porosity with different water-to-powder ratios. J Endod 2003 Dec;29(12):814-817.
Funteas UR, Wallace JA, Fochtman EW. A comparative analysis of mineral trioxide aggregate and Portland cement. Aust Endod J 2003 Apr;29(1):43-44.
Mitchell PJ, Pitt Ford TR, Torabinejad M, McDonald F. Osteoblast biocompatibility of mineral trioxide aggregate. Biomaterials 1999 Jan;20(2):167-173.
Lee SJ, Monsef M, Torabinejad M. Sealing ability of a mineral trioxide aggregate for repair of lateral root perforations. J Endod 1993 Nov;19(11):541-544.
Torabinejad M, Hong CU, MC Donald F, Pitt Ford TR. Physical and chemical properties of a new root end filling material. J Endod 1995 Jul;21(7):349-353.
ProRoot MTA, Product literature, Dentsply Tusla Dental, Tusla, OK 74136.
Torabinejad M, Chivian N. Clinical application of MTA. J Endod 1999 Mar;25(3):197-205.
Shahi S, Rahimi S, Yavari HR, Mokhtari H, Roshangar L, Abasi MM, Sattari S, Abdolrahimi M. Effect of mineral trioxide aggregates and Portland cements on inflammatory cells. J Endod 2010 May;36(5):899-903.
Rahimi S, Shahi S, Lotfi M, Yavari HR, Charejoo ME. Comparison of microleakage with three different thicknesses of mineral trioxide aggregate as root end filling material. J Oral Sci 2008 Sep;50(3):273-277.
Wiltbank KB, Schwartz SA, Schindler WG. Effect of selected accelerants on the physical properties of MTA and Portland cement. J Endod 2007 Oct;33(10):1235-1238.
Huang TH, Shie MY, Kao CT, Ding SJ. The effect of setting accelerator on properties of mineral trioxide mixed with Na2HPO4 as an accelerant. J Endod 2008 May;34(5):590-593.
Nekoofar MH, Stone DF, Dummer PM. The effect of blood contamination on the compressive strength and surface microstructure of mineral trioxide aggregate. Int Endod J 2010 Sep;43(9):782-791.
Aminoshariae A, Hartwell GR, Moon PC. Placement of mineral trioxide aggregate using two different techniques. J Endod 2003 Oct;29(10):679-682.