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Surface roughness of orthodontic band cements with different compositions
OBJECTIVES: The present study evaluated comparatively the surface roughness of four orthodontic band cements after storage in various solutions. MATERIAL AND METHODS: eight standardized cylinders were made from 4 materials: zinc phosphate cement (ZP), compomer (C), resin-modified glass ionomer cemen...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Faculdade de Odontologia de Bauru da Universidade de São
Paulo
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4234333/ https://www.ncbi.nlm.nih.gov/pubmed/21625737 http://dx.doi.org/10.1590/S1678-77572011000300008 |
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author | van de SANDE, Françoise Hélène da SILVA, Adriana Fernandes MICHELON, Douver PIVA, Evandro CENCI, Maximiliano Sérgio DEMARCO, Flávio Fernando |
author_facet | van de SANDE, Françoise Hélène da SILVA, Adriana Fernandes MICHELON, Douver PIVA, Evandro CENCI, Maximiliano Sérgio DEMARCO, Flávio Fernando |
author_sort | van de SANDE, Françoise Hélène |
collection | PubMed |
description | OBJECTIVES: The present study evaluated comparatively the surface roughness of four orthodontic band cements after storage in various solutions. MATERIAL AND METHODS: eight standardized cylinders were made from 4 materials: zinc phosphate cement (ZP), compomer (C), resin-modified glass ionomer cement (RMGIC) and resin cement (RC). Specimens were stored for 24 h in deionized water and immersed in saline (pH 7.0) or 0.1 M lactic acid solution (pH 4.0) for 15 days. Surface roughness readings were taken with a profilometer (Surfcorder SE1200) before and after the storage period. Data were analyzed by two-way ANOVA and Tukey's test (comparison among cements and storage solutions) or paired t-test (comparison before and after the storage period) at 5% significance level. RESULTS: The values for average surface roughness were statistically different (p<0.001) among cements at both baseline and after storage. The roughness values of cements in a decreasing order were ZP>RMGIC>C>R (p<0.001). After 15 days, immersion in lactic acid solution resulted in the highest surface roughness for all cements (p<0.05), except for the RC group (p>0.05). Compared to the current threshold (0.2 µm) related to biofilm accumulation, both RC and C remained below the threshold, even after acidic challenge by immersion in lactic acid solution. CONCLUSIONS: Storage time and immersion in lactic acid solution increased the surface roughness of the majority of the tested cements. RC presented the smoothest surface and it was not influenced by storage conditions. |
format | Online Article Text |
id | pubmed-4234333 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Faculdade de Odontologia de Bauru da Universidade de São
Paulo |
record_format | MEDLINE/PubMed |
spelling | pubmed-42343332014-11-19 Surface roughness of orthodontic band cements with different compositions van de SANDE, Françoise Hélène da SILVA, Adriana Fernandes MICHELON, Douver PIVA, Evandro CENCI, Maximiliano Sérgio DEMARCO, Flávio Fernando J Appl Oral Sci Original Articles OBJECTIVES: The present study evaluated comparatively the surface roughness of four orthodontic band cements after storage in various solutions. MATERIAL AND METHODS: eight standardized cylinders were made from 4 materials: zinc phosphate cement (ZP), compomer (C), resin-modified glass ionomer cement (RMGIC) and resin cement (RC). Specimens were stored for 24 h in deionized water and immersed in saline (pH 7.0) or 0.1 M lactic acid solution (pH 4.0) for 15 days. Surface roughness readings were taken with a profilometer (Surfcorder SE1200) before and after the storage period. Data were analyzed by two-way ANOVA and Tukey's test (comparison among cements and storage solutions) or paired t-test (comparison before and after the storage period) at 5% significance level. RESULTS: The values for average surface roughness were statistically different (p<0.001) among cements at both baseline and after storage. The roughness values of cements in a decreasing order were ZP>RMGIC>C>R (p<0.001). After 15 days, immersion in lactic acid solution resulted in the highest surface roughness for all cements (p<0.05), except for the RC group (p>0.05). Compared to the current threshold (0.2 µm) related to biofilm accumulation, both RC and C remained below the threshold, even after acidic challenge by immersion in lactic acid solution. CONCLUSIONS: Storage time and immersion in lactic acid solution increased the surface roughness of the majority of the tested cements. RC presented the smoothest surface and it was not influenced by storage conditions. Faculdade de Odontologia de Bauru da Universidade de São Paulo 2011 /pmc/articles/PMC4234333/ /pubmed/21625737 http://dx.doi.org/10.1590/S1678-77572011000300008 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles van de SANDE, Françoise Hélène da SILVA, Adriana Fernandes MICHELON, Douver PIVA, Evandro CENCI, Maximiliano Sérgio DEMARCO, Flávio Fernando Surface roughness of orthodontic band cements with different compositions |
title | Surface roughness of orthodontic band cements with different
compositions |
title_full | Surface roughness of orthodontic band cements with different
compositions |
title_fullStr | Surface roughness of orthodontic band cements with different
compositions |
title_full_unstemmed | Surface roughness of orthodontic band cements with different
compositions |
title_short | Surface roughness of orthodontic band cements with different
compositions |
title_sort | surface roughness of orthodontic band cements with different
compositions |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4234333/ https://www.ncbi.nlm.nih.gov/pubmed/21625737 http://dx.doi.org/10.1590/S1678-77572011000300008 |
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