The influence of particle size and curing conditions on testing mineral trioxide aggregate cement
Objectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These...
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2016-12-01
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doaj-66e5b6b8a9d748d1bcf4c408ee194ebd2021-02-02T06:17:15ZengTaylor & Francis GroupActa Biomaterialia Odontologica Scandinavica2333-79312016-12-012113013710.1080/23337931.2016.12391811239181The influence of particle size and curing conditions on testing mineral trioxide aggregate cementWilliam Nguyen Ha0Bill Kahler1Laurence James Walsh2The University of Queensland, Oral Health CenterThe University of Queensland, Oral Health CenterThe University of Queensland, Oral Health CenterObjectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These were then used to create two experimental MTA products, M1 and M2, with M1 < M2 in particle size. Particle size analysis was performed according to ISO 13320. The particle size at the 90th percentile (i.e. the larger particles) was P1: 15.2 μm, P2: 29.1 μm, M1: 16.5 μm, and M2: 37.1 μm. M2 was cured exposed to air, or submerged in fluids of pH 5.0, 7.2 (PBS), or 7.5 for 1 week. CS and FS of the set cement were determined using a modified ISO 9917-1 and ISO 4049 methods, respectively. P1, P2, M1 and M2 were cured in PBS at physiological pH (7.2) and likewise tested for CS and FS. Results: Curing under dry conditions gave a significantly lower CS than when cured in PBS. There was a trend for lower FS for dry versus wet curing. However, this did not reach statistical significance. Cements with smaller particle sizes showed greater CS and FS at 1 day than those with larger particle sizes. However, this advantage was lost over the following 1–3 weeks. Conclusions: Experiments that test the properties of MTA should cure the MTA under wet conditions and at physiological pH.http://dx.doi.org/10.1080/23337931.2016.1239181Compressive strengthcuring mediumflexural strength |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
William Nguyen Ha Bill Kahler Laurence James Walsh |
spellingShingle |
William Nguyen Ha Bill Kahler Laurence James Walsh The influence of particle size and curing conditions on testing mineral trioxide aggregate cement Acta Biomaterialia Odontologica Scandinavica Compressive strength curing medium flexural strength |
author_facet |
William Nguyen Ha Bill Kahler Laurence James Walsh |
author_sort |
William Nguyen Ha |
title |
The influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
title_short |
The influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
title_full |
The influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
title_fullStr |
The influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
title_full_unstemmed |
The influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
title_sort |
influence of particle size and curing conditions on testing mineral trioxide aggregate cement |
publisher |
Taylor & Francis Group |
series |
Acta Biomaterialia Odontologica Scandinavica |
issn |
2333-7931 |
publishDate |
2016-12-01 |
description |
Objectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These were then used to create two experimental MTA products, M1 and M2, with M1 < M2 in particle size. Particle size analysis was performed according to ISO 13320. The particle size at the 90th percentile (i.e. the larger particles) was P1: 15.2 μm, P2: 29.1 μm, M1: 16.5 μm, and M2: 37.1 μm. M2 was cured exposed to air, or submerged in fluids of pH 5.0, 7.2 (PBS), or 7.5 for 1 week. CS and FS of the set cement were determined using a modified ISO 9917-1 and ISO 4049 methods, respectively. P1, P2, M1 and M2 were cured in PBS at physiological pH (7.2) and likewise tested for CS and FS. Results: Curing under dry conditions gave a significantly lower CS than when cured in PBS. There was a trend for lower FS for dry versus wet curing. However, this did not reach statistical significance. Cements with smaller particle sizes showed greater CS and FS at 1 day than those with larger particle sizes. However, this advantage was lost over the following 1–3 weeks. Conclusions: Experiments that test the properties of MTA should cure the MTA under wet conditions and at physiological pH. |
topic |
Compressive strength curing medium flexural strength |
url |
http://dx.doi.org/10.1080/23337931.2016.1239181 |
work_keys_str_mv |
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