Nanofiller loading level: Influence on selected properties of an adhesive resin

Conde, Marcus Cristian Muniz; Zanchi, César Henrique; Rodrigues-Junior, Sinval Adalberto; Carreño, N.L.V.; Ogliari, Fabrício Aulo; Piva, Evandro

doi:10.1016/j.jdent.2009.01.001

Cited by 55 publications

(48 citation statements)

References 36 publications

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“…For composite resins, the depth of cure has been reported in some studies to undergo a decrease of conversion with an increase in the filler content [38] which could be due to the light scattering effect of the particles [39]. While a recent study of Conde et al [37] comparing different filler contents (1-10%) in dental adhesive did not find an effect on the degree of conversion, Miyazaki et al [7] reported that adhesive with a filler content superior to 40 wt% may not be completely polymerized leading to a weak bond. This may in part explain the slightly higher prevalence of gaps in a filler level of 50 wt% compared to 30 wt% and 40 wt% observed in our study.…”

Section: Discussionmentioning

confidence: 97%

“…The degree of conversion of dental adhesives may also affect the mechanical properties and lead to bond failure [37]. For composite resins, the depth of cure has been reported in some studies to undergo a decrease of conversion with an increase in the filler content [38] which could be due to the light scattering effect of the particles [39].…”

Section: Discussionmentioning

confidence: 99%

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Effect of adhesive filler content on marginal adaptation of class II composite resin restorations

St-Pierre¹,

Chen²,

Qian³

et al. 2017

J Oper Esthet Dent.

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Introduction: Adhesive formulation may affect the marginal adaptation of composite resin restorations. Objectives: To evaluate the effect of adhesive filler content on the gingival marginal adaptation of Class II composite resin restorations. Materials and methods: Class II cavity preparations were made in ninety intact extracted human molars. Specimens were randomized and equally distributed in 6 groups (n = 15). Preparations were etched and All-Bond 3 primers A + B (Bisco, Schaumburg, IL/USA) were applied. One group received All-Bond 3 adhesive/resin (50 wt% filler) and the other five groups received the same resin composition but with filler contents of 0, 10, 20, 30 and 40 wt%. Teeth were restored with Filtek Supreme Ultra (3M, St-Paul, MN/USA), finished and stored in artificial saliva (37°C/24 h) before replicas were made for FE-SEM observation (200X). Quantitative margin analysis was performed based on a four criteria: MQ1 (continuous margin), MQ2 (marginal irregularities, porosities, roughness, no gap), MQ3 (small gaps of up to 2 microns) and MQ4 (severe gaps). Data were analyzed with a one-way ANOVA based on ranked data followed by the post-hoc Bonferroni test. Results: There was no statistically significant difference in "continuous margin" observed among the six filler contents (p = 0.0886). However, significantly less severe gaps were obtained with filler levels of 30 wt% and 40 wt% compared to 0 wt% (p = 0.0159). A noticeable but non-significant difference was observed for the unfilled adhesive (0 wt%), which showed the lowest mean % for continuous margins and the highest for severe gaps. Conclusion: Filler addition to adhesive appears to improve the marginal adaptation. Filler contents of 30 wt% and 40 wt% significantly reduced the occurrence of severe gaps compared to 0 wt%.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Effect of adhesive filler content on marginal adaptation of class II composite resin restorations

St-Pierre¹,

Chen²,

Qian³

et al. 2017

J Oper Esthet Dent.

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“…In contrast, only the NR group and the RL group were activated by both a photoinitiator and a chemical initiator, which can be determined by the instructions of the product. Dual-cured RMGIC contain two initiator systems: a photoinitiator and a chemical initiator, so the resin monomers can be polymerized by light-curing and chemical-curing processes [12,13]. Dualcured RMGIC occur in three stages: after an acid-base reaction at the beginning, the resin monomers are polymerized by light-curing and chemical-curing [14].…”

Section: Discussionmentioning

confidence: 99%

A comparison study on the flexural strength and compressive strength of four resin-modified luting glass ionomer cements

Lin

Zheng

et al. 2015

BME

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Abstract. The purpose of this study is to compare the differences in flexural strength and compressive strength between four resin-modified luting glass ionomer cements that are commonly used in clinics. Furthermore, this study investigates the influence of curing mode on the flexural strength and compressive strength of dual-cured resin-modified glass ionomer cements. Initially, flexural strength and compressive strength test specimens were prepared for RL, NR, GCP, and GCC. The RL group and NR group were cured by the light-curing mode and chemical-curing mode. Five specimens were prepared for each test group, and the flexural strength and compressive strength of each were measured. Data were analyzed by one-way ANOVA with SPSS 13.0. Furthermore, the fracture morphology of the flexural specimens was observed by SEM. The result of the mean flexural strength of each group is as follows: the NR light-cured group > NR chemically-cured group > GCP > RL light-cured group > GCC > RL chemically-cured group. More specifically, the flexural strength of the NR light-cured group ((42.903±4.242) MPa) is significantly higher (P<0. 05) than those of the other groups, and in addition, the flexural strength of the light-curing mode is significantly higher (P<0. 05) than that of both the NR and RL chemically-cured groups. The result of the mean compressive strength of each group is as follows: GCP > NR chemically-cured group > NR lightcured group > GCC > RL light-cured group > RL chemically-cured group. Although the compressive strengths of the NR and GCP groups are higher than those of the GCC and RL groups, there are no significant differences (P>0. 05) between NR and GCP, and no significant differences between GCC and RL. Furthermore, there are no significant differences (P>0. 05) between the two curing modes on NR and RL. From the present study, it can be concluded that NR has superior flexural strength and compressive strength compared to the other three materials. Additionally, the curing mode can affect the flexural strength of dual-cured RMGIC because with the light-curing mode, the flexural strength is higher than with the chemicalcuring mode. Therefore, light curing is an essential procedure when using dual-cured RMGIC in clinics.

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“…Although the addition of filler to adhesives has shown to be beneficial 20 this finding is not consensual in the literature 20,27 . The addition of filler particles to composite resins is made in an attempt to improve the mechanical properties of dental composites 13,25,28,29 . Similarly, the present investigation showed that the addition of filler loading higher equal to or higher than 25% allowed the increase in the microhardness of the experimental adhesives.…”

Section: Discussionmentioning

confidence: 99%

Effects of zirconia nanoparticles addition to experimental adhesives on radiopacity and microhardness

Martins¹,

Meier²,

Loguércio³

et al. 2013

Braz. J. Oral Sci.

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Aim: To evaluate the radiopacity and microhardness (KHN) of experimental dental adhesives (EX). The experimental adhesive resins of the present study were formulated based on the simplified adhesive system Ambar (FGM). Methods: Five EX with different concentrations of zirconia nanoparticles [0(EX0), 15(EX15), 25(EX25), 30(EX30) e 50%(EX50)] were incorporated in a UDMA/HEMA adhesive (control). Adper Single Bond TM 2 (SB, 3M ESPE) was used as a commercial reference. For the radiopacity (n=5), KHN (n=5), adhesive specimens were fabricated using a stainless steel mold. Data were submitted to one-way ANOVA and Tukey´s test (α=0.05). Results:The filler addition on the EX showed radiopacity similar to enamel and higher than SB. The EX25, EX35 and EX50 showed higher KHN values when compared to the commercial SB. EX25, EX35 and EX50 showed higher KHN values when compared to the commercial SB. Conclusions:The results of the present investigation suggest that the addition of zirconia nanoparticles seems to be a good alternative to produce radiopaque adhesives with increased microhardness.

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Nanofiller loading level: Influence on selected properties of an adhesive resin

Cited by 55 publications

References 36 publications

Effect of adhesive filler content on marginal adaptation of class II composite resin restorations

Effect of adhesive filler content on marginal adaptation of class II composite resin restorations

A comparison study on the flexural strength and compressive strength of four resin-modified luting glass ionomer cements

Effects of zirconia nanoparticles addition to experimental adhesives on radiopacity and microhardness

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