Effect of bulk/incremental fill on internal gap formation of bulk-fill composites

Furness, Alan R.; Tadros, Marko Yousef; Looney, Stephen W.; Rueggeberg, Frederick A.

doi:10.1016/j.jdent.2014.01.005

Cited by 158 publications

(149 citation statements)

References 22 publications

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“…Studies evaluating the formation of internal spaces in restorations (28) and cervical marginal integrity (29) demonstrate similar performance between bulk fill resin and conventional composites. Furthermore, the bulk fill technique has been shown to provide lower cusp strain, shrinkage stress and higher fracture resistance (30).…”

Section: Discussionmentioning

confidence: 93%

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

et al. 2016

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The aim of this study was to compare the fatigue resistance of restored teeth with bulk fill composite resin, conventional composite resin with incremental insertion and unprepared sound teeth. Twenty-eight extracted maxillary premolars were selected and divided into 4 groups based on composite resin and insertion technique: control (C), conventional composite resin with incremental insertion (I) and bulk fill composite resin with three (BF3) or single increment (BF1). The restored specimens were submitted to fatigue resistance test with a 5 Hz frequency. An initial application of 5,000 sinusoidal load cycles with a minimum force of 50 N and a maximum force of 200 N was used. Next, were applied stages of 30,000 load cycles with the maximum force increasing gradually: 400, 600, 800, 1000, 1200 and 1400 N. The test was concluded when 185,000 load cycles were achieved or the specimen failed. The fatigue resistance data were recorded for comparison, using the Kaplan-Meier survival curve and analyzed by log-rank test at 0.05 significance. Fractures were classified based on the position of the failure - above or below the cementoenamel junction (CEJ). Statistical analysis of the Kaplan-Meier survival curve and log-rank test showed a significant difference between groups (p=0.001). The fracture analysis demonstrated that only 28.58% of failures were below the CEJ in group C, while for groups I, BF1 and BF3 they were 42.85%, 85.71% and 85.71%, respectively. Teeth restored with composite bulk fill in both techniques present similar fatigue resistance values compared with those restored with a conventional incremental insertion of composite, while the fatigue strength values of unprepared sound teeth were higher. Furthermore, unprepared sound teeth showed a lower percentage of fractures below the CEJ.

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Section: Discussionmentioning

confidence: 93%

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

et al. 2016

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“…Furthermore, a previous study provided that EverX Posterior could be used in 4 mm increments in extensive posterior cavities to mimic the stress absorbing properties of dentine 38,39) . Since, these composites enable 4-5 mm thick increments to be cured in one step; they are time-saving and easy-handling composites 40,41) . However, in the current study, Group RC had low load bearing capacity value (269.9±60.2 N).…”

Section: Discussionmentioning

confidence: 99%

Load-bearing capacity of novel resin-based fixed dental prosthesis materials

et al. 2018

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To evaluate the influence of different materials on the load-bearing-capacity of inlay-retained fixed-dental-prosthesis (FDP). Ten types of FDPs were evaluated (n=7/group): Group PEEK: CAD-CAM polyetheretherketone (PEEK-TechnoMed), Group RC, made of discontinuous-fiber-composite (EverX Posterior); Group FRC1, made of discontinuous-fiber-composite (EverX Posterior) with two-bundles of continuous-unidirectional fiber-reinforced-composite (FRC) (Everstick C&B); Group FRC2, made of discontinuousfiber-composite (EverX Posterior) with two-bundles of continuous-unidirectional-FRC (Everstick C&B) covered by two-pieces of short-unidirectional-FRC (Everstick C&B) placed perpendicular to the main-framework; Group FB, CAD-CAM fiber-block (FibraComposite Bio-C); Group PMMA, CAD-CAM polymethyl methacrylate block (Temp basic); Group RP, resin-paste; Group FRP1, made of resin-paste (G-Fix) with two-bundles of continuous-unidirectional-FRC (Everstick C&B); Group FRP2, made of resin-paste (G-Fix) two-bundles of continuous-unidirectional-FRC covered by two-pieces of short unidirectional-FRC placed perpendicular to the mainframework and Group exp-FRC, experimental CAD-CAM FRC. The bridges were statically-loaded until fracture. Fracture modes were visually examined. ANOVA revealed that significant differences were observed between FDP-materials (p<0.05). In addition, fiber addition to the framework significantly affected load-bearing-capacity (p<0.05).

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“…These bulk-fill composites may, however, be associated with increased shrinkage stress (especially the low viscosity flowable bulk-fills), increased internal gap formation, incomplete double bond conversion and lower physical and mechanical properties [3][4][5][6][7] . An ideal bulk fill material will have minimum polymerization shrinkage, a high degree of conversion ratio throughout, long term durability and curing up to the purported depth 8) . Studies investigating the depth of cure of bulkfill RBCs are still limited and none have explored the performance of recently launched bulk-fill PRG (prereacted glass) RBCs.…”

Section: Introductionmentioning

confidence: 99%

Depth of cure of contemporary bulk-fill resin-based composites

Yap

Pandya

Toh

2016

Dental Materials Journal

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This study evaluated the depth of cure (DOC) of packable and flowable bulk-fill resin-based composites (RBCs) including PRG (prereacted glass ionomer) and short-fiber materials. The materials were placed in a black split-mold with a 7 mm deep recess and cured at 700 mW/cm 2 for 20 s using a LED curing light. DOC was assessed using the ISO scraping and Knoops hardness tests. Data (n=5) were computed and analyzed using one-way ANOVA/Scheffe's post hoc test (p<0.05). ISO DOC ranged from 3.66 to 2.54 mm while DOC based on hardness testing ranged from 3 to 1.5 mm. For all materials, a decrease in hardness was observed with increasing depths. The DOC of bulk-fill RBCs was product dependent and greater than standard composites. At 4 mm depth, none of the bulk-fill RBCs had a depth: top hardness ratio of 0.8 and above.

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Effect of bulk/incremental fill on internal gap formation of bulk-fill composites

Cited by 158 publications

References 22 publications

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

Load-bearing capacity of novel resin-based fixed dental prosthesis materials

Depth of cure of contemporary bulk-fill resin-based composites

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