Mohammad Ali Saghiri1, James L Gutmann2, Jafar Orangi3, Armen Asatourian3, Nader Sheibani4. 1. Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin; Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. Electronic address: saghiri@gmail.com. 2. Department of Restorative Sciences, Texas A&M University Baylor College of Dentistry, Dallas, Texas. 3. Department of Dental Materials, Kamal Asgar Research Center, Tehran, Iran. 4. Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin; Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
Abstract
INTRODUCTION: The aim of this study was to evaluate the impact of radiopaque additive, bismuth oxide, particle size on the physical properties, and radiopacity of tricalcium silicate-based cements. METHODS: Six types of tricalcium silicate cement (CSC) including CSC without bismuth oxide, CSC + 10% (wt%) regular bismuth oxide (particle size 10 μm), CSC + 20% regular bismuth oxide (simulating white mineral trioxide aggregate [WMTA]) as a control, CSC + 10% nano bismuth oxide (particle size 50-80 nm), CSC + 20% nano-size bismuth oxide, and nano WMTA (a nano modification of WMTA comprising nanoparticles in the range of 40-100 nm) were prepared. Twenty-four samples from each group were divided into 4 groups and subjected to push-out, surface microhardness, radiopacity, and compressive strength tests. Data were analyzed by 1-way analysis of variance with the post hoc Tukey test. RESULTS: The push-out and compressive strength of CSC without bismuth oxide and CSC with 10% and 20% nano bismuth oxide were significantly higher than CSC with 10% or 20% regular bismuth oxide (P < .05). The surface microhardness of CSC without bismuth oxide and CSC with 10% regular bismuth oxide had the lowest values (P < .05). The lowest radiopacity values were seen in CSC without bismuth oxide and CSC with 10% nano bismuth oxide (P < .05). Nano WMTA samples showed the highest values for all tested properties (P < .05) except for radiopacity. CONCLUSIONS: The addition of 20% nano bismuth oxide enhanced the physical properties of CSC without any significant changes in radiopacity. Regular particle-size bismuth oxide reduced the physical properties of CSC material for tested parameters. Published by Elsevier Inc.
INTRODUCTION: The aim of this study was to evaluate the impact of radiopaque additive, bismuth oxide, particle size on the physical properties, and radiopacity of tricalcium silicate-based cements. METHODS: Six types of tricalcium silicate cement (CSC) including CSC without bismuth oxide, CSC + 10% (wt%) regular bismuth oxide (particle size 10 μm), CSC + 20% regular bismuth oxide (simulating white mineral trioxide aggregate [WMTA]) as a control, CSC + 10% nano bismuth oxide (particle size 50-80 nm), CSC + 20% nano-size bismuth oxide, and nano WMTA (a nano modification of WMTA comprising nanoparticles in the range of 40-100 nm) were prepared. Twenty-four samples from each group were divided into 4 groups and subjected to push-out, surface microhardness, radiopacity, and compressive strength tests. Data were analyzed by 1-way analysis of variance with the post hoc Tukey test. RESULTS: The push-out and compressive strength of CSC without bismuth oxide and CSC with 10% and 20% nano bismuth oxide were significantly higher than CSC with 10% or 20% regular bismuth oxide (P < .05). The surface microhardness of CSC without bismuth oxide and CSC with 10% regular bismuth oxide had the lowest values (P < .05). The lowest radiopacity values were seen in CSC without bismuth oxide and CSC with 10% nano bismuth oxide (P < .05). Nano WMTA samples showed the highest values for all tested properties (P < .05) except for radiopacity. CONCLUSIONS: The addition of 20% nano bismuth oxide enhanced the physical properties of CSC without any significant changes in radiopacity. Regular particle-size bismuth oxide reduced the physical properties of CSC material for tested parameters. Published by Elsevier Inc.
Authors: Mohammad Ali Saghiri; Mehrdad Lotfi; Morteza Daliri Joupari; Mohammad Aeinehchi; Ali Mohammad Saghiri Journal: J Endod Date: 2010-06-25 Impact factor: 4.171
Authors: Josette Camilleri; Franco E Montesin; Ken Brady; Richard Sweeney; Richard V Curtis; Thomas R Pitt Ford Journal: Dent Mater Date: 2005-04 Impact factor: 5.304
Authors: Mohammad Ali Saghiri; Jafar Orangi; Armen Asatourian; James L Gutmann; Franklin Garcia-Godoy; Mehrdad Lotfi; Nader Sheibani Journal: Dent Mater J Date: 2016-10-22 Impact factor: 2.102
Authors: Anabela Paula; Eunice Carrilho; Mafalda Laranjo; Ana M Abrantes; João Casalta-Lopes; Maria Filomena Botelho; Carlos Miguel Marto; Manuel M Ferreira Journal: Materials (Basel) Date: 2019-10-16 Impact factor: 3.623