Please use this identifier to cite or link to this item: http://guaiaca.ufpel.edu.br:8080/handle/123456789/737
metadata.dc.type: Article
Title: Surface roughness of orthodontic band cements with different compositions
Authors: Sande, Françoise Hélène van de
Silva, Adriana Fernandes da
Michelon, Douver
Piva, Evandro
Cenci, Maximiliano Sérgio
Demarco, Flávio Fernando
Abstract: 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.
Keywords: Resin cements
Dental materials
Publisher: Journal of Applied Oral Science/Scielo
Citation: Sande, Françoise Hélène van de ; Silva, Adriana Fernandes da ; Michelon, Douver ; Piva, Evandro ; Cenci, Maximiliano Sérgio ; Demarco, Flávio Fernando . Surface roughness of orthodontic band cements with different compositions. Journal of Applied Oral Science (Impresso), v. 19, n.3, p. 223-227, 2011.
URI: http://hdl.handle.net/123456789/737
Issue Date: 2011
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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