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Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement
Introduction: This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. Methods and Materials: Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and thei...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Iranian Center for Endodontic Research
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4224764/ https://www.ncbi.nlm.nih.gov/pubmed/25386207 |
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author | Sobhnamayan, Fereshte Sahebi, Safoora Naderi, Misagh Shojaee, Nooshin Sadat Shanbezadeh, Najmeh |
author_facet | Sobhnamayan, Fereshte Sahebi, Safoora Naderi, Misagh Shojaee, Nooshin Sadat Shanbezadeh, Najmeh |
author_sort | Sobhnamayan, Fereshte |
collection | PubMed |
description | Introduction: This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. Methods and Materials: Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, CEM cement was mixed according to manufacturers’ instruction and placed in the lumens with minimal pressure. The specimens were randomly divided into four groups (n=12) which were wrapped in pieces of gauze soaked in either synthetic tissue fluid (STF) (pH=7.4) or butyric acid which was buffered at pH values of 4.4, 5.4 and 6.4. They were then incubated for 4 days at 37°C. The push-out test was performed by means of the universal testing machine. Specimens were then examined under a digital light microscope at 20× magnification to determine the nature of the bond failure. The data were analyzed using the Kruskal-Wallis test followed by Dunn’s test for pairwise comparisons. Results: The highest push-out bond strength (10.19±4.39) was seen in the pH level of 6.4, which was significantly different from the other groups (P<0.05). The values decreased to 2.42±2.25 MPa after exposure to pH value of 4.4. Conclusion: Lower pH value of highly acidic environments (pH=4.4), adversely affects the force needed for displacement of CEM cement; while in higher pH values (pH=6.4) the bond-strength was not affected. CEM cement is recommended in clinical situations where exposure to acidic environment is unavoidable. |
format | Online Article Text |
id | pubmed-4224764 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Iranian Center for Endodontic Research |
record_format | MEDLINE/PubMed |
spelling | pubmed-42247642014-11-10 Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement Sobhnamayan, Fereshte Sahebi, Safoora Naderi, Misagh Shojaee, Nooshin Sadat Shanbezadeh, Najmeh Iran Endod J Original Article Introduction: This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. Methods and Materials: Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, CEM cement was mixed according to manufacturers’ instruction and placed in the lumens with minimal pressure. The specimens were randomly divided into four groups (n=12) which were wrapped in pieces of gauze soaked in either synthetic tissue fluid (STF) (pH=7.4) or butyric acid which was buffered at pH values of 4.4, 5.4 and 6.4. They were then incubated for 4 days at 37°C. The push-out test was performed by means of the universal testing machine. Specimens were then examined under a digital light microscope at 20× magnification to determine the nature of the bond failure. The data were analyzed using the Kruskal-Wallis test followed by Dunn’s test for pairwise comparisons. Results: The highest push-out bond strength (10.19±4.39) was seen in the pH level of 6.4, which was significantly different from the other groups (P<0.05). The values decreased to 2.42±2.25 MPa after exposure to pH value of 4.4. Conclusion: Lower pH value of highly acidic environments (pH=4.4), adversely affects the force needed for displacement of CEM cement; while in higher pH values (pH=6.4) the bond-strength was not affected. CEM cement is recommended in clinical situations where exposure to acidic environment is unavoidable. Iranian Center for Endodontic Research 2014 2014-10-07 /pmc/articles/PMC4224764/ /pubmed/25386207 Text en © 2014, Iranian Center for Endodontic Research This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Sobhnamayan, Fereshte Sahebi, Safoora Naderi, Misagh Shojaee, Nooshin Sadat Shanbezadeh, Najmeh Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title | Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title_full | Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title_fullStr | Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title_full_unstemmed | Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title_short | Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement |
title_sort | effect of acidic environment on the push-out bond strength of calcium-enriched mixture cement |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4224764/ https://www.ncbi.nlm.nih.gov/pubmed/25386207 |
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