Discoloration of Provisional Restorations after Oral Rinses

Abstract

Purpose: Oral rinses are widely used to promote periodontal health with provisional restorations during the interim period. The aim of this study was to compare the discoloration of provisional restoration materials with different oral rinses.Material and Methods: A total of 140 disc-shaped specimens (shade A2) (10 mm x 2 mm) were prepared from one PMMA-based (TemDent Classic®) and three different bis-acrylic-based (Protemp II®, Luxatemp® and Fill-In®) provisional restoration materials (n=7). The color values (L*, a*, and b*) of each specimen were measured before and after exposure with a colorimeter, and the color changes (∆E) were calculated according to the CIE L*a*b* system. The specimens were immersed in each of the 4 oral rinses (alcohol-containing mouthwash, chlorhexidine, benzydamine HCl, benzydamine HCl and chlorhexidine) twice a day for 2 minutes. After 2 minutes of immersion in the oral rinses, the specimens were immersed in artificial saliva. The specimens were exposed to the oral rinses and the artificial saliva for 3 weeks. Two-way ANOVA, the Bonferroni test and the paired sample t-test were used for statistical analyses (p<0.05).Results: Comparison of the discoloration from the oral rinses after immersion for three weeks revealed no significant differences (p>0.05). The lowest color change was observed in PMMA-based Temdent in all oral rinses (p<0.05). There were no significant differences between the bis-acryl composites after immersion in saliva or the mixture of benzydamine HCl and chlorhexidine and the alcohol-containing mouthwash for 3 weeks (p>0.05). After immersion in chlorhexidine, the color change values of Protemp II and Fill-in showed significant differences (p=0.018). Protemp II also showed less discoloration than the other bis-acryl composites, and this color change was statistically significant (p <0.05). For all oral rinses, the L* value decreased while b* values increased, and this color change was found to be statistically significant (p <0.05). A* values were found to be significantly higher with oral rinses (p<0.05), except Protemp II immersed in benzydamine HCl or alcohol-containing mouthwash.Conclusions: The type of the oral rinse did not affect the discoloration process. For long-term esthetic results, choosing MMA-based materials for provisional restorations appears to be more effective.

Evaluation of color stability of different temporary restorative materials

“…Moreover, studies conducted by Haselton et al 4 and Turgut et al 17 pointed out the capacity of absorption and adsorption of pigmenting solutions to influence the color stability of acrylic resins. This occurs because the PMMA-based materials have a more homogeneous composition, and consequently the capacity to absorb and adsorb solutions may have a direct influence on color stability.…”

“…This occurs because the PMMA-based materials have a more homogeneous composition, and consequently the capacity to absorb and adsorb solutions may have a direct influence on color stability. Due to the heterogeneity of bis-acrylic resins, the pigmenting solution is capable of infiltrating into the midst of the small particles of material, thus causing a greater level of pigmentation 4,17 .…”

Farklı içeceklerde bekletilen geçici restorasyon materyallerinin renk stabilitelerinin karşılaştırılması

“…Geçici materyallerinin renk stabilitesini inceleyen çalışmalara benzer şekilde tüm örnekler 2 mm kalınlığında hazırlanarak standardizasyon sağlanmıştır. 6,8,11 Ağız ortamına maruz kalan tüm dental materyallerde olduğu geçici materyallerde de restorasyonun yüzeyinin pürüzlülüğü renk stabilitesi, yüzey aşınması, bakteriyel tutunum üzerindeki etkileri sebebiyle önemlidir. Yüzeyin mümkün olduğu kadar pürüzsüz yani parlak olması istenir.…”

Influência da técnica de acabamento e do tempo de exposição na estabilidade cromática do bis‐acrílico

“…Possibilitam a obtenção de boa adaptação marginal, estética adequada e facilidade de reparação 6,[8][9][10][11] . Comparativamente às tradicionais resinas acrílicas, apresentam baixa contração de polimerização e reduzida exotermia [11][12][13][14] , mas têm sido associadas a dificuldade de polimento adequado e a estabilidade cromática controversa [1][2][3][15][16][17][18][19][20][21] .…”

“…Em certas situaç ões clínicas, cuja permanência em função das restauraç ões provisórias poderá ultrapassar os 6 meses, a estabilidade cromática dos materiais utilizados assume especial importância 10,16,18 . Alteraç ões de cor clinicamente percetíveis podem comprometer a aceitabilidade do tratamento provisório, podendo levar à insatisfação do paciente com consequente aumento de dispêndio económico e de tempo clínico para a sua substituição 20,22,23 .…”