Abstract
Introduction
The purpose of this study was to evaluate the effect of acid etching on the compressive
strength of 4 calcium silicate–based cements.
Methods
One gram of each corresponding powder of ProRoot MTA (Dentsply Tulsa Dental, Johnson
City, TN), MTA Angelus (Angelus, Londrina, PR, Brazil), and CEM cement (BioniqueDent,
Tehran, Iran) and a 0.33-g aliquot of liquid were placed in a plastic mixing capsule
that was then mechanically mixed for 30 seconds at 4500 rpm in an amalgamator. For
the preparation of Biodentine (Septodont, Saint Maur-des-Fossés, France), the liquid
provided was added to the powder within the plastic capsule supplied by the manufacturer
and then mechanically mixed for 30 seconds at 4500 rpm using the amalgamator. The
resulting slurries were then placed incrementally into 40 cylindrical molds to give
a total of 160 specimens that were incubated at 37°C for a week. Twenty specimens
of each material were then subjected to the acid etch procedure. The compressive strength
of the samples was then calculated in megapascals using a universal testing machine.
The results were then subjected to 2-way analysis of variance analysis of variance
followed by the Tukey post hoc test.
Results
The application of acid etch significantly reduced (P < .0001) the compressive strength of Angelus MTA and CEM cement; however, it did
not reduce the compressive strength of ProRoot MTA or Biodentine. Regardless of the
acid etch application, Biodentine showed significantly higher compressive strength
values than the other materials (P < .0001), whereas CEM cement had the lowest compressive strength values. There was
no significant difference between CEM cement and MTA Angelus. The compressive strength
of ProRoot MTA was significantly lower (P < .0001) than Biodentine but significantly higher (P < .0001) than MTA Angelus and CEM cement in both the test and control groups.
Conclusions
When the application of acid etchants is required, Biodentine and ProRoot MTA seem
to be better options than MTA Angelus or CEM cement.
Key Words
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Article info
Publication history
Published online: October 17, 2013
Identification
Copyright
© 2013 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
