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Effect of 15% carbamide peroxide bleaching gel on color stability of giomer and microfilled composite resin: an in vitro comparison

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Effect of 15% carbamide peroxide bleaching gel on color stability of giomer and microfilled composite resin: an in vitro comparison

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dc.contributor.author Mohammadi, Narmin es
dc.contributor.author Kimyai, Soodabeh es
dc.contributor.author Abed Kahnamoii, Mehdi es
dc.contributor.author Ebrahimi Chaharom, Mohammad Esmaeel es
dc.contributor.author Sadr, Alireza es
dc.contributor.author Daneshi, Mehdi es
dc.date.accessioned 2014-05-28T12:42:48Z
dc.date.available 2014-05-28T12:42:48Z
dc.date.issued 2012 es
dc.identifier.citation Mohammadi, Narmin ; Kimyai, Soodabeh ; Abed Kahnamoii, Mehdi ; Ebrahimi Chaharom, Mohammad Esmaeel ; Sadr, Alireza ; Daneshi, Mehdi. Effect of 15% carbamide peroxide bleaching gel on color stability of giomer and microfilled composite resin: an in vitro comparison. En: Medicina oral, patología oral y cirugía bucal. Ed inglesa, 2012, Vol. 17, No. 6: 1082-1088 es
dc.identifier.uri http://hdl.handle.net/10550/35518
dc.description.abstract Objectives: The effect of 15% carbamide peroxide bleaching gel on color stability and surface topography of a giomer and a microfilled composite resin was evaluated in the present in vitro study. Study design: Forty discs measuring 10 mm in diameter and 1 mm in thickness were prepared from a giomer and a microfilled composite resin. Each material yielded 20 discs with completely smooth surfaces. Then a spectrophotometer was used to measure L* (lightness), a* (redness, greenness) and b* (blueness, yellowness) color coordinates of all the discs. Subsequently, the specimens were subjected to 15% carbamide peroxide bleaching gel. After measuring the color coordinates once again, color changes (DE*) were calculated by the CIELAB system. Six specimens from each material (three specimens before bleaching agent application and three specimens thereafter) were viewed under an atomic force microscope (AFM) for surface topography evaluation. Data were analyzed by Mann-Whitney U and Kruskal-Wallis tests at a=0.05. Results: There were no statistically significant differences in color changes (DE*) between the two materials (P>0.05). In addition, no significant differences were detected in surface roughness between composite resin and giomer discs before and after bleaching (P>0.05 for both). However, in both materials the differences in surface roughness were significant before and after bleaching procedures (P<0.001). Conclusions: Based on the results of the present study it was concluded that 15% carbamide peroxide does not induce clinically detectable color changes in composite resin and giomer despite an increase in surface roughness. en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title Effect of 15% carbamide peroxide bleaching gel on color stability of giomer and microfilled composite resin: an in vitro comparison es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.type.hasVersion VoR es_ES

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