RESUMO
OBJECTIVES: The aim of this study was to evaluate the clinical performance of surface sealants associated with a bulk-fill composite in posterior restorations after 4 years. METHODS: A total of 174 posterior restorations were performed on 57 participants using a self-etch adhesive system and a bulk-fill composite. The groups were then divided into the following categories: 1) without surface sealant (NoS), 2) with surface sealant Biscover (Bisco, SBi), and 3) with surface sealant Permaseal (Ultradent, SPe). Restorations were evaluated using FDI criteria at baseline and after 1 and 4 years. Statistical analysis was conducted using Kaplan-Meier survival analysis and the Chi-square test (α = 0.05). RESULTS: After 4 years, only one restoration was lost (1 in the NoS group). The fracture/retention rate (with 95% confidence interval) was 98% for NoS and 100% for both SBi and SPe (p = 0.76). The majority of secondary outcomes showed minor defects, with no significant differences among the groups (p > 0.05). However, significant differences were observed among the groups in terms of marginal staining and marginal adaptation (p = 0.03). In both items, twelve restorations (nine in NoS, one in SBi, and two in SPe) showed minor marginal discrepancies favoring the sealant groups (SBi and SPe). SIGNIFICANCE: Regardless of the use of surface sealants, the bulk-fill composite restorations showed excellent clinical performance after 4 years. However, the groups that received sealants showed better marginal adaptation and less marginal discoloration compared to those that did not receive sealants.
Assuntos
Resinas Compostas , Cárie Dentária , Humanos , Restauração Dentária Permanente , Adaptação Marginal Dentária , Materiais Dentários , Projetos de PesquisaRESUMO
Abstract Objectives This is a double-blind, split-mouth, randomized clinical study that aims to evaluate the influence of bulk-fill composite packaging presented in syringes (BSy) and capsules (BCa), and the effect of selective enamel etching (SEE) on the clinical performance of class I and II bulk-fill resin composite restorations after 24 months. Methodology A total of 295 class I or class II restorations were performed on 70 patients. One universal adhesive was applied in all restorations. SEE was used in 148 restorations and self-etching mode (SET) in 147 restorations. After the adhesive application, cavities were restored with Filtek Bulk-fill Posterior Restorative in syringes (BSy), Filtek One Bulk-fill in capsules (BCa), or Filtek Supreme Ultra in syringes with the incremental technique (In). All restorations were evaluated using the FDI criteria after one week and after six, 12, and 24 months. Kaplan-Meier survival analysis and Pearson's Chi-square test were used (α=0.05) for statistical analysis. Results After 24 months, 62 patients were evaluated and four restorations were lost due to fracture (one for SEEBSy, two for SEEIn, and one for SETIn). No significant differences in the fracture and retention rate were found between groups (p>0.05). SEE showed significantly fewer marginal adaptation defects than SET (p<0.05). BCa and BSy groups showed fewer marginal discrepancies compared to In (p<0.05). Restorations performed with BCa showed less color mismatch than BSy or In (p<0.05). Conclusion Although all restorations exhibited satisfactory clinical performance after 24 months of clinical service, the clinical behavior of class I and II restorations' improved when performed with a bulk-fill composite in capsules, mainly when associated with a universal adhesive applied with SEE.
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Objective: The objective of this study was to evaluate the alteration of the optical properties of bulk fill resin-based composites after two years of simulated toothbrushing. Material and Methods: Three high-viscosity bulk fill resin composites and one conventional sculptable resin composite (control) were analyzed. Five specimens of each resin composite were prepared, and roughness, color, translucency and gloss were evaluated initially and after one and two years of simulated toothbrushing. The specimens were submitted to electric simulated toothbrushing (14600 strokes / 100 g) using a commercially available soft bristle toothbrush and toothpaste slurry in a proportion of 1:2 by weight. The brushing scheme was of 40 cycles per day (2 cycles per second / 280 cycles in a week). The optical properties and the roughness data were analyzed by a multifactor analysis of variance (MANOVA) and a Tukey post hoc test. Results: The baseline and final values of Ra and Sa were submitted to linear regression analyses, all of which were performed at a significance level of 5%. Gloss and roughness presented statistical differences between the resin-time interactions in all composite resins. The gloss (72.5%) and roughness (89.4%) worsened significantly after brushing, but the authors didn't find statistically significant differences when evaluating translucency and color. Conclusion: Based in the results, it could be concluded that the simulated brushing degraded the gloss and roughness of the used high-viscosity bulk fill composites. (AU)
Objetivo: O objetivo deste estudo foi avaliar a alteração das propriedades ópticas de resinas compostas do tipo bulk fill após dois anos de escovação simulada. Material e Métodos: Foram analisadas três resinas compostas do tipo bulk fill de alta viscosidade e uma resina composta convencional (controle). Cinco corpos-deprova de cada resina composta foram preparados e a rugosidade, cor, translucidez e brilho foram avaliados inicialmente e após um e dois anos de escovação simulada. Os espécimes foram submetidos a escovação dental simulada (14.600 golpes / 100 g) utilizando-se escova de dentes de cerdas macias comercialmente disponíveis e uma pasta composta de dentifrício e água na proporção de 1:2 em peso. O esquema de escovação foi de 40 ciclos por dia (2 ciclos por segundo / 280 ciclos por semana). As propriedades ópticas e os dados de rugosidade foram analisados por uma análise de variância multifatorial (MANOVA) e um teste post hoc de Tukey. Resultados: Os valores iniciais e finais de Ra e Sa foram submetidos a análises de regressão linear, todas realizadas ao nível de significância de 5%. O brilho e a rugosidade apresentaram diferenças estatísticas entre as interações resina-tempo em todas as resinas compostas. O brilho (72,5%) e a rugosidade (89,4%) pioraram significativamente após a escovação, mas os autores não encontraram diferenças estatisticamente significativas ao avaliar a translucidez e a cor. Conclusão: Com base nos resultados, pôde-se concluir que a escovação simulada degradou o brilho e a rugosidade das resinas compostas do tipo bulk fill avaliadas. (AU)
Assuntos
Escovação Dentária , Análise de Variância , Resinas CompostasRESUMO
Abstract The objectives of this double-blind randomized clinical trial were to compare (a) the clinical times and (b) the occurrence and severity of postoperative sensitivity, of posterior restoration that used a universal adhesive, in a self-etch or selective enamel-etching technique, along with incremental or bulk-fill composites (presented in syringes or capsules). A total of 295 posterior restorations were placed according to the following groups: SETB - self-etch/bulk-fill in syringe; SETC - self-etch/bulk-fill in capsules; SETI - self-etch/incremental; SEEB - selective enamel-etching/bulk-fill in syringe; SEEC - selective enamel-etching/bulk-fill in capsules; and SEEI - selective enamel-etching/incremental. Clinical time was assessed by a reason (s/mm3) between the total volume of resin inserted and the total time required to perform the restorations. Postoperative sensitivity was evaluated using two scales (Numeric Rating Scale and Visual Analogue Scale). Mean clinical time results, analyzed by Wald's Chi-square, showed significant statistical differences among all groups (p<0.001), indicating that the restorative strategy affected the time required for the restoration. A generalized estimating equation model statistical analysis, performed to compare postoperative sensitivity, showed that neither the restorative technique, the adhesive strategy nor the presentation mode of the bulk-fill composite affected the overall risk of postoperative sensitivity (4.06 [2.22-6.81]). The use of bulk-fill composite, presented in capsules or syringes, is less time consuming and does not increase the risk or intensity of postoperative sensitivity relative to the traditional incremental technique.