ABSTRACT
Introduction: Infiltrant resins were developed to hamper carious lesion progression and mask the whitish appearance of first evidence of caries. Objective: This study aimed at testing the hypothesis that a long application time of resin infiltrant in proximal enamel caries improves esthetic outcome compared to the commercially recommended time. Materials and Methods: Twenty teeth with uncavitated inactive proximal white enamel caries lesions (selected by two calibrated examiners; inter-examiner κ = 0.87) were divided into two groups (experimental and control group; n = 10) that agreed regarding lesion surface area. Lesions were infiltrated following the protocol recommended by the manufacturer (two applications, 3 min application first and another 1 min application later; control) and by the protocol tested in this study (one application of 30 min; experimental). Enamel opaqueness (esthetic outcome) was measured by a calibrated examiner (intra-class coefficient of 0.9) before and after infiltration using fluorescence microscopy. Results: Reduction of enamel opaqueness was significantly higher in the experimental group (40.0% ± 18.5%) than in the control group (18.6% ± 14.9%) (P = 0.0105, one-tailed t-test; Hedge's g of 1.28, 95% confidence interval of 0.43/2.13, and power of 86%). Conclusions: It can be concluded that the application time of 30 min provides a greater reduction in opaqueness of proximal enamel lesion compared to the application time recommended by the manufacturer. The high effect size could stimulate patients to comply with the treatment time.
ABSTRACT
Different techniques are employed to control de caries progression, such as fluoride remineralization and resin infiltration (ICON®). However, the interference of these techniques on further adhesive procedures on the treated tissue is still controversial. The aim of this study was to evaluate the bond strength (BS) of the bovine enamel demineralized and treated with either fluoride or ICON®. Material and Methods: The tooth fragments were randomly divided into 4 groups: Group Sound samples (control); Group Demineralized samples (DS); Group Remineralized samples (NaF- 0.05% /8 weeks); Group ICON® samples. The samples were etched and next, a total etch bonding system was applied followed by resin composite. Then, they were submitted to microtensile test in a universal testing machine (10 Kg 1 mm/min). Results: Data were evaluated by ANOVA. There were statistically significant differences among groups (p = 0.28), with the following mean values (MPa): Group: Sound samples ((20,20 ± 2,97), Group: Demineralized Samples (21.99 ± 4.25), Group: Remineralized Samples (23.48 ± 4.03), Group: ICON® samples (22.10 ± 3,37). Conclusion: The treatments did not interfere in bond strength of the composite resin to enamel, providing values similar to those of the control group
Diferentes técnicas são empregadas como forma de controle da progressão da lesão cariosa, como a remineralização com flúor e a infiltração com resina (ICON®). No entanto, a interferência destas técnicas sobre futuros procedimentos adesivos no tecido tratado ainda mostra-se controversa. O objetivo do estudo foi avaliar a resistência adesiva (RA) em esmalte bovino desmineralizado e tratado com flúor ou com ICON®. Materiais e Métodos: Fragmentos dentais foram divididos aleatoriamente em 4 grupos: Grupo Espécimes íntegros (controle); Grupo Espécimes desmineralizados (ED); Grupo Espécimes Remineralizados (NaF- 0,05% /8 semanas); Grupo Espécimes ICON®. Sobre os espécimes tratados foi feito condicionamento ácido, aplicação de adesivo total etch e resina composta, sendo submetidos ao teste de microtração em máquina de ensaio universal (10Kg 1mm/min). Resultados: Os dados foram avaliados pelo teste ANOVA. Não houve diferença significante entre os grupos (p=0,28) sendo que, os valores médios em MPa obtidos para os diferentes grupos foram: Grupo: Espécimes Íntegros (20,20 ± 2,97), Grupo: Espécimes Desmineralizados (21,99 ± 4,25), Grupo: Espécimes Remineralizados (23,48 ± 4,03), Grupo: Espécimes ICON® (22,10 ±3,37). Conclusão: os tratamentos não interferiram na RA da resina composta ao esmalte, fornecendo valores semelhantes ao controle.