Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/doi/10.1590/1807-2577.00421
Revista de Odontologia da UNESP
Original Article

Effect of different placement techniques on color stability and surface roughness of resin composites

Efeito das técnicas de inserção e alisamento na estabilidade de cor e rugosidade superficial de resinas compostas

Fernanda KERPEL; Ana Carolina BAMBERG; Gabriel Ferreira NICOLOSO; Leonardo Lamberti MIOTTI; Andressa DALMOLIN; Luciana Abitante SWAROWSKY; Marcela MARQUEZAN; Letícia Brandão DURAND

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Abstract

Abstract: Introduction: Longevity and clinical success of dental restorations can be influenced by many factors during the restorative procedures.

Objective: This study aimed to evaluate the influence of different placement techniques on color stability and surface roughness of two resin composites.

Material and method: The groups of specimens (n=10) were divided according to resin composite (FiltekTM Z250 XT and FiltekTM Z350 XT) and placement technique: Mylar strip, spatula, dry brush, modeling liquid, and surface sealant. Color stability and surface roughness were accessed using a spectrophotometer (CIELab color space) and a rugosimeter (standard cutoff of 0.8 mm), respectively, after water storage. Subsequently, the specimens were immersed in coffee for 48 h and final color was measured. The data were analyzed using ANOVA and the Tukey’s post hoc test (α=5%) and the correlation between surface roughness (Ra) and color change (∆Eab) was assessed using the Pearson’s correlation coefficient.

Result: The different placement techniques influenced Ra and ∆Eab on both resin composites. The groups treated with surface sealant showed greater difference in ∆Eab for both resin composites. The FiltekTM Z250 XT resin showed greater color stability compared with the FiltekTM Z350 XT resin regardless of the placement technique used. Ra of each placement technique was similar among the resin composites except for the FiltekTM Z350 XT modeling liquid group, which presented lower Ra values compared with those of FiltekTM Z250 XT. A correlation between Ra and staining was identified (p=0.268).

Conclusion: Color stability and Ra are influenced by different placement techniques.

Keywords

Dental materials, dental esthetic, staining

Resumo

Resumo: Introdução: A longevidade e o sucesso clínico das restaurações dentárias podem ser influenciados por muitos fatores durante os procedimentos restauradores.

Objetivo: Avaliar a influência da técnica de alisamento na estabilidade de cor e rugosidade superficial de duas resinas compostas.

Material e método: Os grupos de amostras (n=10) foram divididos conforme a resina composta (FiltekTM Z250 XT e FiltekTM Z350 XT) e as técnicas empregadas: tira de poliéster, espátula, pincel seco, selante de superfície. A cor e a rugosidade da superfície foram avaliadas por espectrofotômetro (espaço de cor CIELab) e rugosímetro (corte padrão de 0,8 mm), respectivamente, após o armazenamento em água. Posteriormente, as amostras foram imersas em café por 48h e a cor final foi aferida. Os dados foram analisados usando teste ANOVA e Tukey post hoc (α = 5%) e a correlação entre rugosidade da superfície (Ra) e variação de cor (∆Eab) através do coeficiente de correlação de Pearson.

Resultado: As técnicas de alisamento influenciaram a Ra e a ∆Eab em ambas as resinas compostas. Os grupos tratados com selante de superfície apresentaram maior diferença na ∆Eab. A resina FiltekTM Z250 XT apresentou maior estabilidade de cor comparada à FiltekTM Z350 XT, independentemente da técnica utilizada. A Ra das técnicas de alisamento foi semelhante entre os compósitos, exceto para o grupo do líquido modelador da FiltekTM Z350 XT, que apresentou os menores valores. Uma correlação entre Ra e manchamento (p = 0,268) foi identificada.

Conclusão: A estabilidade da cor e a Ra são influenciadas pelas técnicas de alisamento utilizadas.
 

Palavras-chave

Materiais dentários, estética dental, coloração

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Submitted date:
01/21/2021

Accepted date:
02/04/2021

60904ed9a9539503336a9833 rou Articles
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