Marginal quality of flowable 4-mm base vs. conventionally layered resin composite

Roggendorf, Matthias J.; Krämer, Norbert; Appelt, Andreas; Naumann, Michael; Frankenberger, Roland

doi:10.1016/j.jdent.2011.07.004

Cited by 184 publications

(161 citation statements)

References 21 publications

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“…However, simplification of use of resin composites has not been frequently reported during the last decade [2], though clinicians desire to perform high-quality dentistry at minimal chair time. Incremental layering techniques have long been accepted as a standard and are widely used for light-curing resin composite restorations.…”

Section: Introductionmentioning

confidence: 99%

Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

et al. 2014

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OBJECTIVES To evaluate the influence of irradiation time on degree of conversion (DC) and microhardness of high-viscosity bulk-fill resin composites in depths up to 6 mm. MATERIALS AND METHODS Four bulk-fill materials (Tetric EvoCeram Bulk Fill-TECBF; x-tra fil-XF; QuixFil-QF; SonicFill-SF) and one conventional nano-hybrid resin composite (Tetric EvoCeram-TEC) were irradiated for 10, 20, or 30 s at 1,170 mW/cm(2). DC and Knoop microhardness (KHN) were recorded after 24-h dark storage at five depths: 0.1, 2, 4, 5, and 6 mm. Data were statistically analyzed using ANOVA and Bonferroni's post-hoc test ( = 0.05). RESULTS With increasing bulk thickness, DC and KHN significantly decreased for TEC. TECBF and SF showed a significant decrease in DC and KHN at 4-mm depth after 10-s irradiation, but no decrease in DC after 30-s irradiation (p > 0.05). XF and QF demonstrated no significant DC decrease at depths up to 6 mm after irradiation of at least 20 s. At 4-mm depth, all materials tested achieved at least 80 % of their maximum DC value, irrespective of irradiation time. However, at the same depth (4 mm), only XF and QF irradiated for 30 s achieved at least 80 % of their maximum KHN value. CONCLUSIONS Regarding DC, the tested bulk-fill resin composites can be safely used up to at least 4-mm incremental thickness. However, with respect to hardness, only XF and QF achieved acceptable results at 4-mm depth with 30 s of irradiation. CLINICAL RELEVANCE Minimum irradiation times stated by the manufacturers cannot be recommended for placement of highviscosity bulk-fill materials in 4-mm increments. Conclusions: Regarding DC, the tested bulk-fill resin composites can be safely used up to at least 4-mm incremental thickness. However, with respect to hardness, only XF and QF achieved acceptable results at 4-mm depth with 30 s of irradiation.Clinical relevance: Minimum irradiation times stated by the manufacturers cannot be recommended for placement of high-viscosity bulk-fill materials in 4-mm increments.

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Section: Introductionmentioning

confidence: 99%

Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

et al. 2014

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“…Clinically, these stresses may be transferred to the margins of the restoration, possibly affecting marginal quality [15]. When marginal quality is not adequate, problems like leakage, recurrent caries and pulpal irritation may occur [16,17]. Even by considering that an absolutely perfect marginal seal is not achievable clinically, a good marginal seal should be the main objective for clinicians.…”

Section: Introductionmentioning

confidence: 99%

An In-Vitro Assessment of Micro-Shear Bond Strength of a Nano Adhesive to Dentin with Different types of Composite Restorative Systems

Shamrani¹

2016

JDHODT

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Objective: The present study evaluated the micro-shear bond strength of a nano adhesive to dentin with different types of composite restorative systems. Materials and method:Thirty caries-free, freshly extracted human molar teeth were sliced to expose dentin. The dentin slices were randomly divided into three main groups (10 each) and bonding was done at three sites so as to create total 90 samples with 30 in each group. Group A: nanofilled Composite, Group B: Tetric EvoCeram Bulk fill and Group C: Sonic Fill Bulk fills composite. Adhesive (nano bond) was used for bonding in all the groups. After 24 hours of immersion in water at 37°C, then subjected to thermocycling, a micro-shear bond test was carried out. One way analysis of variance (ANOVA) and Tukey's tests were used for testing the significance between the means of tested groups (P value ≤ 0.05). Result:The mean micro-shear bond strength values for Groups A, B, C were 10.4, 13.85 and 17.16 MPa respectively. Conclusion:Sonic Fill Bulk fills composite and nano bond displayed the highest micro-shear bond strength to dentin.

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“…A cavity depth of 2 mm showed highest significant mean microtensile bond strength (MPa) (22.72±3.81) compared with that of 4 mm (21.15±5.11) at p=0.001. Mean and standard deviation (SD) for the microtensile bond strength of different resin composite regardless of other variables were presented in table (2) and figure (2). Nanohybrid resin composite showed the highest significant mean microtensile bond strength (22.27±4.59) compared with Bulkfill resin composite (21.56±4.58) at p=0.009.…”

Section: Effect Of Cavity Depth On the Mean Microtensile Bond Strengtmentioning

confidence: 99%

“…(2) The nanohybrid-based resin composite restorations showed better results with the vertical layering technique (3) . Newly developed posterior resin composite material has been introduced, which can be applied by bulk filling of the cavity preparation by increment thickness about 4mm without the need for incremental layering (4,5) .…”

Section: Introductionmentioning

confidence: 98%

In-vivo Bond Degradation Resistance and In-vitro Degree of Conversion of Bulk Fill Versus Nano Filled Resin Composite Restoratives

et al. 2017

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Aim: This study was conducted to evaluate bulk fill and nanohybrid resin composite at different cavity depth and after different testing periods. Materials & methods:Standardized simple box class II occluso-mesial (OM) cavities were prepared in the selected first maxillary premolar in each quadrant. The cavity depth was adjusted to be either 2mm or 4mm in each patient. For the bulkfill composite, both the two and four-millimeters cavities, one increment of the resin composite material (Xtra-fil) was packed inside the cavity while for the nanohybrid resin composite (Grandio), the four millimeters cavities were filled incrementally by packing two increments of 2mm thickness while for the two millimeters cavities one increment (2mm) was packed to fill the cavity and light cured for 20 seconds, finished, polished and left for the assigned time. The restored tooth was extracted atraumatically and teeth were sectioned to produce beam-shaped specimens of (1 ± 0.1 mm 2 ). The beam specimens were attached with cyanoacrylate gel to fit the Instron Universal testing machine. The tensile load was applied at a cross-head speed of 0.5mm/minute until specimen failure occurred. At this point the failure load in Newton was recorded.Results: Cavity depth of 2 mm showed the highest significant mean microtensile bond strength compared with that of 4 mm. Nanohybrid resin composite showed the highest significant mean micro tensile compared with Bulkfill resin composite. The testing period of 24 hours showed highest significant mean microtensile bond strength that one tested after 3 and 6 months. Conclusion:(1) cavity depth has an apparent influence on tensile bond strength of the tested restoratives to dentin. (2) Microtensile bond strength of the tested restorations deteriorates by aging.

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Marginal quality of flowable 4-mm base vs. conventionally layered resin composite

Cited by 184 publications

References 21 publications

Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

An In-Vitro Assessment of Micro-Shear Bond Strength of a Nano Adhesive to Dentin with Different types of Composite Restorative Systems

In-vivo Bond Degradation Resistance and In-vitro Degree of Conversion of Bulk Fill Versus Nano Filled Resin Composite Restoratives

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