Effect of bioinactive inorganic element (BIE) particle size added to modified mineral trioxide aggregate on microleakage and physical properties
Yasini, Sayed Reza
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Mineral Teroxide Aggregate (MTA), developed initia11y as a root end filling material and has gained popularity among clinician in respect to other endodontics materials due to the superiority of its biological and physical properties. MTA has many qualities that may render it an ideal material. Bioactjve Inorganic Element (BIE) is a type of bioactive glass which can induce bone formation. Addition of the BIE to MTA may improve the biocompatibility characteristics of MTA especially by inducing bone formation, which can facilitate and enhance the healing at the defect site such as perforation repair or apicoectomy. The purpose of this study was to investigate the effect of BIE addition by 10% weight and different particle size range (25-50[mu]m, 75-90[mu]m and [greater than]150[mu]m) on strength and microleakage of an Experimental version of Mineral Teroxide Aggregate (EMTA). The biaxial flexural strength was determined and measured with an Instron universal testing machine at the periods of l, 7, 21, and 28 days after preparation of the samples. A fluid filtration method was used for quantitative evaluation of apical microleakage; the leakage of each specimen was measured at l, 7, 21 and 28 days. The data were statistically analyzed with both one-way ANOVA and Turkey’s HSD test method. The results showed that the addition of the BIE with the particle sizes of 25-50[mu]m and 75-90[mu]m had no significant (p[greater than]0.05) effect on the biaxial flexural strength of EMTA, while the addition of the BIE with particles larger than 150[mu]m significantly (p[less than]0.05) decreased the biaxial flexural strength of the EMTA. Addition of the BIE with particle sizes of 75-90[mu]m increased the leakage of the EMTA, which found to be non-significant. Moreover, the addition of the BIE with particle sizes larger than 150[mu]m significantly (p[less than]0.05) increased the microleakage of EMTA. On the other hand, the addition of the BIE with 25-50[mu]m particle size range had no significant (p[greater than]0.05) effect on the microleakage of EMTA. Under the condition of this study it appears that, addition of the BIE with 25-50[mu]m in particle size range had no effect on the strength and microleakage properties of EMTA. Even though the addition of BIE with particle sizes of75-90[mu]m had no effect on the strength of EMTA it can alter the microleakage of EMTA. Furthermore, addition of BIE with particles larger than 150[mu]m can alter both the strength and microleakage of EMTA.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact firstname.lastname@example.org.Thesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2013 (Department of Endodontics).Includes bibliographic references: leaves 74-78.
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