The Effects of Exposure Time on the Surface Microhardness of Three Dual-Cured Dental Resin Cements

Aguiar, Tatiana C.; Saad, José Roberto Cury; Pinto, Shelon Cristina Souza; Calixto, Luiz Rafael; Lima, Darlon Martins; Silva, Marcos A. S.; Bandéca, Matheus Coêlho

doi:10.3390/polym3030998

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…In addition, according to Carek et al [191] , various resin cements present a significant degree of conversion during their first 7 days post-cure and this period seems to be critical to determine their flexural strength and modulus as these properties tend to increase during the first 28 days. Aguiar et al [192] , reported that resin cement micro-hardness increases during the first 7 days following curing, regardless of curing time and conditions. Finally, the classic articles by Mitchell et al [193] , and Knoblock et al [194] , use the 7-day period post-cure as a landmark for the determination of the mechanical properties of resin cements.…”

Section: Discussionmentioning

confidence: 99%

Zirconia bond strength durability following artificial aging: A systematic review and meta-analysis of in vitro studies

Rigos¹,

Sarafidou

Kontonasaki

2023

Japanese Dental Science Review

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Section: Discussionmentioning

confidence: 99%

Zirconia bond strength durability following artificial aging: A systematic review and meta-analysis of in vitro studies

Rigos¹,

Sarafidou

Kontonasaki

2023

Japanese Dental Science Review

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“…Technologies have been developed that enable production of the appropriate amount of light for the efficient conversion of composite resins [15][16][17][18], resulting in improved physical and chemical properties, which can be analyzed and studied by several methods, such as hardness testing and analysis of the degree of conversion and compressive strength [19][20][21][22][23]. The compressive strength indicates the ability demonstrated by a material to withstand vertical stress.…”

Section: Introductionmentioning

confidence: 99%

Compressive strength of dental composites photo-activated with different light tips

et al. 2013

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The aim of this study was to evaluate the compressive strength of microhybrid (Filtek TM Z250) and nanofilled (Filtek TM Supreme XT) composite resins photo-activated with two different light guide tips, fiber optic and polymer, coupled with one LED. The power density was 653 mW cm 2 when using the fiber optic light tip and 596 mW cm 2 with the polymer. After storage in distilled water at 37 ± 2 C for seven days, the samples were subjected to mechanical testing of compressive strength in an EMIC universal mechanical testing machine with a load cell of 5 kN and speed of 0.5 mm min 1 . The statistical analysis was performed using ANOVA with a confidence interval of 95% and Tamhane's test. The results showed that the mean values of compressive strength were not influenced by the different light tips (p > 0.05). However, a statistical difference was observed (p < 0.001) between the microhybrid composite resin photo-activated with the fiber optic light tip and the nanofilled composite resin. Based on these results, it can be concluded that microhybrid composite resin photo-activated with the fiber optic light tip showed better results than nanofilled, regardless of the tip used, and the type of the light tip did not influence the compressive strength of either composite. Thus, the presented results suggest that both the fiber optic and polymer light guide tips provide adequate compressive strength to be used to make restorations. However, the fiber optic light tip associated with microhybrid composite resin may be an interesting option for restorations mainly in posterior teeth.

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“…9,22 Other factors, such as difficult access to the apical region and possible limitations of cement flow may be assigned for this result, 12,22 as well as the decreasing effectiveness of light curing at regions farther from the light source, since that the performance of the dual-cured resin cements improve after setting by light and chemical activation; demonstrating the importance of light curing. 12,22,23 No significant difference was found between the root thirds of fiber posts cemented with self-adhesive cements. The lowest sensitivity of the technique may have favored the performance of this cement at the three root thirds, since the procedures of etching, rinsing, drying and application of adhesive system, considered critical steps, are eliminated.…”

Section: Resultsmentioning

confidence: 94%

Influence of Relining Post on the Bond Strength of Resin Cements

et al. 2015

The Journal of Contemporary Dental Practice

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This study evaluated the influence of relining fiber posts on the bond strength (BS) of resin cements in the root canal. Forty bovine teeth were divided in four groups (n = 10): G1 (ARC)-fiber post cemented with resin cement RelyX ARC; G2 (ARC+Z350)-relined fiber post cemented with RelyX ARC; G3 (U200)-fiber post cemented with self-adhesive cement RelyX U200; G4 (U200+Z350)-relined fiber post cemented with RelyX U200. The roots were sectioned in six 1.2-mm slices and the push-out test was performed. Data were analyzed by three-way analysis of variance (ANOVA), and Tukey's test (α = 0.05). For the conventional resin cement, there was no significant difference between groups G1-ARC (15.5 ± 3.8) and G2-ARC+Z350 (16.1 ± 4.5). For the self-adhesive cement, the results revealed higher BS values for relined posts G4-U200 + Z350 (19.9 ± 7.9) as compared to non-relined posts G3-U200 (14.4 ± 4.5). For both cements, in groups of relined posts, the apical and the cervical thirds presented similar BS. Relining enhances the performance of the self-adhesive resin cement, and the interaction between relining and root third influences the BS to the conventional resin cement.

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The Effects of Exposure Time on the Surface Microhardness of Three Dual-Cured Dental Resin Cements

Cited by 4 publications

References 19 publications

Zirconia bond strength durability following artificial aging: A systematic review and meta-analysis of in vitro studies

Zirconia bond strength durability following artificial aging: A systematic review and meta-analysis of in vitro studies

Compressive strength of dental composites photo-activated with different light tips

Influence of Relining Post on the Bond Strength of Resin Cements

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