Modification of the restoration protocol for resin-based composite (RBC) restoratives (conventional and bulk fill) on cuspal movement and microleakage score in molar teeth

Politi, Ioanna; McHugh, Lauren E.J.; Al-Fodeh, Rami S.; Fleming, Garry J.P.

doi:10.1016/j.dental.2018.05.010

Cited by 37 publications

(22 citation statements)

References 44 publications

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“…Thus, results of the present study revealed that no significant differences among all experimental groups was found when the displacement was measured after cavity preparation. These results are in accordance with other studies that reported that the teeth were exposed to deformation after cavity preparation but this deflection was not statistically significant among all groups because they were performed by same operator and prepared by the standardized method (7) .…”

Section: Discussionsupporting

confidence: 91%

The Effect of Liner Placement under Bulk-Fill Resin Composite Restorations on Cuspal Deflection in Maxillary Premolar Teeth.

2021

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Purpose: This study investigated the cuspal deflection in premolar teeth restored with different bulk-fill resin composites with or without using a liner. Materials and Methods: 60 extracted human upper premolar teeth were used. The samples in this study were divided into three main groups (20 samples for each) according to the materials used; Each group was subdivided into two subgroups according to presence of liner. Standardized large MOD cavities were prepared. The distance between two reference points on cusp tips was measured before the restoration using a universal microscope. Then the teeth were restored with different bulk-fill resin composites (Filtek bulk fill, X-tra fil bulk fill and Activa Bioactive Restorative Material) with and without a liner (Activa Bioactive base/ liner). Second reading of cuspal deflection was measured 15 min after the completion of restorations. All samples were subjected to thermal cycling using thermal cycler machine. Then the third reading of cuspal deflection was measured. The data were statistically analyzed with Kolmogorov-Smirnov and Shapiro-Wilk tests. Results: no statistically significant difference was found between the mean cuspal deflection of the three composites and cuspal deflection without liner showed statistically significantly higher mean value than with liner. Conclusion: The placement of Activa Bioactive base/liner beneath the bulk-fill resin composite restorations decreased cuspal deflection.

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Section: Discussionsupporting

confidence: 91%

The Effect of Liner Placement under Bulk-Fill Resin Composite Restorations on Cuspal Deflection in Maxillary Premolar Teeth.

2021

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“…However, this type of investigation, from ISO standard No. 11405, has been applied in recently published studies . Besides, the present experiment was standardized as much as possible (e.g., by using a single operator for each step of the study) in order to reduce variability.…”

Section: Discussionmentioning

confidence: 99%

Synthesis, characterization, and aging resistance of the polyurethane dimethacrylate layer for dental restorations

Guo

Cheng

Wang

et al. 2020

European J Oral Sciences

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In this study, polyurethane dimethacrylate (PUDMA) was synthetized from different components and incorporated into a direct resin composite restoration system with the aim to buffer tooth–resin interfacial stresses and maintain the marginal adaptation. The tensile strength, elongation at fracture (ε), and thermal stability of the PUDMA layer were characterized, showing a tensile strength of 22 MPa, an ε of 112%, and a thermal decomposition temperature of about 282°C. In addition, the degree of conversion, water sorption/solubility, hydrophobicity, microtensile bond strength (μTBS), marginal leakage, and cytotoxicity in vitro were evaluated for the PUDMA layer. The data were analyzed using one‐way ANOVA, except for leakage depths (which were analyzed using the Wilcoxon paired‐rank test). The level of significance was set at 0.05. Compared with dental adhesives, PUDMA displayed a higher degree of conversion, lower water sorption/solubility, and improved hydrophobicity and biocompatibility in vitro. After thermocycling, the μTBS of the restoration system containing PUDMA had increased compared with the μTBS at 24 h. Restorations containing PUDMA showed lower leakage depths than those which did not contain PUDMA. In conclusion, because of its hydrophobic and elastic nature, the PUDMA layer, when used as an intermediate between tooth and resin restoratives, may buffer interfacial stresses, improve the stability and durability of the bonding interface, and reduce microleakage.

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“…These materials, which can be classified as low-viscosity (flowable) and high-viscosity (sculptable) bulk-fill composites, possess increased depths of cure compared with conventional resin composite materials, allowing placement and photopolymerization of thick composite layers up to 4–5 mm [ 9 , 10 , 11 ]. Both flowable and sculptable bulk-fill composites have been found to generate lower shrinkage forces [ 12 , 13 , 14 ] and less cuspal flexure [ 15 , 16 ] than conventional resin composites. Furthermore, similar marginal adaptation [ 17 , 18 , 19 ] and similar clinical success rates [ 20 , 21 , 22 ] of bulk-fill and conventional composites have been reported in permanent teeth.…”

Section: Introductionmentioning

confidence: 99%

Margin Integrity of Bulk-Fill Composite Restorations in Primary Teeth

2020

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This in vitro study examined the margin integrity of sculptable and flowable bulk-fill resin composites in Class II cavities of primary molars. Standardized Class II cavities were prepared in human primary molars and restored with the following resin composite materials after application of a universal adhesive: a sculptable bulk-fill composite (Tetric EvoCeram Bulk Fill (TEC) or Admira Fusion x-tra (AFX)), a flowable bulk-fill composite (Venus Bulk Fill (VBF) or SDR), or a conventional composite (Filtek Supreme XTE (FS)). The bulk-fill materials were applied in 4 mm layers, while the conventional composite was applied in either 2 mm (FS2, positive control) or 4 mm layers (FS4, negative control). The specimens were exposed to thermo-mechanical loading (TML) in a computer-controlled masticator. A quantitative margin analysis was performed both before and after TML using scanning electron microscopy, and the percentage of continuous margins (margin integrity) was statistically analyzed (α = 0.05). All composites showed a significant decline in margin integrity after TML. AFX exhibited the significantly highest margin integrity of all materials after TML (97.5 ± 2.3%), followed by FS2 (79.2 ± 10.8%), TEC (73.0 ± 9.1%), and FS4 (71.3 ± 14.6%). SDR (43.6 ± 22.3%) and VBF (25.0 ± 8.5%) revealed the lowest margin integrity. In conclusion, the tested sculptable bulk-fill materials show similar or better margin integrity in primary molars than the conventional resin composite placed in 2 mm increments.

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Modification of the restoration protocol for resin-based composite (RBC) restoratives (conventional and bulk fill) on cuspal movement and microleakage score in molar teeth

Cited by 37 publications

References 44 publications

The Effect of Liner Placement under Bulk-Fill Resin Composite Restorations on Cuspal Deflection in Maxillary Premolar Teeth.

The Effect of Liner Placement under Bulk-Fill Resin Composite Restorations on Cuspal Deflection in Maxillary Premolar Teeth.

Synthesis, characterization, and aging resistance of the polyurethane dimethacrylate layer for dental restorations

Margin Integrity of Bulk-Fill Composite Restorations in Primary Teeth

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