Polymerization and shrinkage kinetics and fracture toughness of bulk-fill resin-composites

Yang, Jiawei; Silikas, Nick; Watts, D.C.

doi:10.1016/j.dental.2022.10.002

Cited by 6 publications

(7 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initial reduced viscosity of resin composites may play a role in reducing their mechanical properties (3,20) , which could further explain our VHN findings. Also for the organic matrix, the presence of stiffer Bis-GMA (21) , in X-tra fill, may have also played a positive role in improving the surface microhardness (9,22) detected in our study. Furthermore, monomer reactivity and filler/matrix refractive index mismatch may participate in variation of different resin composites maturation (23) .…”

Section: Resultsmentioning

confidence: 50%

“…Preheating of resin composites was recommended as a method to improve the properties and adaptation of the final resin composite restorations. A temperature of 54°C was chosen in our study since temperatures in the range between 54°C and 68°C was described as the most proper range to improve workability and performance of the material (9,10) .…”

Section: Resultsmentioning

confidence: 99%

“…This process is reversed as soon as sonic energy is stopped allowing for carving and contouring. Such process is claimed to have a positive impact on adaptation, DC and workability (8,9) . Also in a trial to improve the adaptation and DC, and reduce voids and air entrapment, of highly filled resin composite a preheating step was proposed in literature, with a claim to improve physical and mechanical properties of the final resin composite restorations (10,11) .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Evaluation of Preheating versus Sonic Activation of Bulk-Fill Resin Composite

Fayed,

Aboelezz,

Farouk

2023

Advanced Dental Journal

View full text Add to dashboard Cite

Aim: This study aimed to investigate the effect different physical energies, either heat or sonic activation, on the surface microhardness of two different bulk-fill resin composites. Materials and Methods: Sixty disc shaped resin composite specimens with standardized diameter of 6mm and overall thickness of 4 mm were used in this study. The prepared specimens were divided into two equal groups (N=30), according to type of bulk fill resin composite (R); Group 1: X-tra fil (Voco) (R1) and Group 2: SonicFill 3 (Kerr) (R2). Each group was further subdivided into three equal subgroups according to the method of energy (E) delivered to the bulk fill resin composite material before light initiated polymerization (n=10); either without any energy delivered to the material (Eo), preheating at 54℃ using resin composite heating device (Calset, AdDent Inc, Danbury, CT, USA) (E1) or sonic activation (SonicFill™ hand piece, Kerr, USA) (E2). Specimens were cured from the top using light curing unit for 40 seconds. Finally, the VHN (S) was evaluated at the top (S1) and the bottom (S2) surfaces of each specimen. Results: Three-way ANOVA revealed statistically significant differences in two main effects; the types of resin composites (P<0.0001), and tested depth of restoration (P<0.0001). On the other hand, methods of physical activation showed no statistical significant differences (P = 0.631). Conclusions: Bulk fill resin composite formulation is a major determinant of its Vicker's hardness number. Both sonication and pre-heating had the same effect on VHN of nano-hybrid, SonicFill 3 bulk fill resin composite.

show abstract

Section: Resultsmentioning

confidence: 50%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Evaluation of Preheating versus Sonic Activation of Bulk-Fill Resin Composite

Fayed,

Aboelezz,

Farouk

2023

Advanced Dental Journal

View full text Add to dashboard Cite

show abstract

“…One study suggests an increase in microhardness but a decrease in fracture toughness [26]. Finally, one study shows a decrease in fracture toughness alone [31].…”

Section: Resultsmentioning

confidence: 99%

Examining the Impact of Preheating on the Fracture Toughness and Microhardness of Composite Resin: A Systematic Review

Bhopatkar,

Ikhar,

Chandak

et al. 2023

Cureus

View full text Add to dashboard Cite

The objective of this comprehensive study was to systematically evaluate the effects of preheating on two critical mechanical properties, microhardness and fracture toughness, in resin composite materials. The overarching goal was to provide valuable insights into the potential benefits and limitations of this technique for enhancing the overall mechanical performance of such materials. To achieve this, an extensive and systematic electronic search was conducted across multiple reputable databases, including MEDLINE/PubMed, SCOPUS, ProQuest, SpringerLink, Web of Science, ScienceDirect, and Google Scholar, with data collection extending until June 2023. This rigorous search process resulted in the identification of 29 pertinent articles, which were subjected to a thorough risk of bias assessment employing the Quality Assessment Tool For In Vitro Studies (QUIN).The findings of this comprehensive investigation revealed several noteworthy trends. First, concerning microhardness, all the studies consistently demonstrated a positive effect of preheating on this mechanical property. This uniformity in results corroborates the initial hypothesis that preheating indeed enhances microhardness in resin composite materials. Second, with respect to fracture toughness, a majority of the studies provided evidence supporting the notion that preheating has a favorable influence on this particular mechanical property. This alignment of outcomes suggests that preheating can be a beneficial technique for improving fracture toughness in resin composites. However, it is essential to note that there were a few exceptions within the collected data, where preheating appeared to lead to a decrease in fracture toughness. Additionally, one study reported no statistically significant effect on fracture toughness. These deviations from the general trend highlight the complexity of the relationship between preheating and fracture toughness, indicating that other factors or material-specific nuances may come into play.In conclusion, the results of this study indicate that preheating resin composites can improve microhardness and fracture toughness, offering potential benefits for dental restorations. Yet, conflicting data warrants further research to uncover the reasons behind these discrepancies. Future studies should also investigate preheating's broader impact on composite resin materials to gain a comprehensive understanding of its applications and limitations in the field.

show abstract

“…The problem of low fracture toughness is particularly evident in larger direct restorations, as the volume of the material increases. Fracture toughness is a mechanical property that determines how well brittle materials resist the catastrophic propagation of flaws under an applied load [ 16 , 17 , 18 ]. This parameter is considered to be the measure of fatigue resistance, which predicts structural performance [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Extensive Restorations Made with Short Fiber-Reinforced Composites without Coverage: A Systematic Review of In Vitro Studies

Jakab,

Palkovics,

T. Szabó

et al. 2024

Polymers

View full text Add to dashboard Cite

In recent years, composite resin materials have been the most frequently used materials for direct restorations of posterior teeth. These materials have some clinically relevant limitations due to their lack of fracture toughness, especially when used in larger cavities with high volume factors or when utilized as direct or indirect overlays or crown restorations. Recently, short-fiber-reinforced composite materials have been used in bi-structure restorations as a dentine substituting material due to their superior mechanical properties; however, there is no scientific consensus as to whether they can be used as full restorations. The aim of our review was to examine the available literature and gather scientific evidence on this matter. Two independent authors performed a thorough literature search using PubMed and ScienceDirect up until December 2023. This study followed the PRISMA guidelines, and the risk of bias was assessed using the QUIN tool. The authors selected in vitro studies that used short-fiber-reinforced composite materials as complete restorations, with a conventional composite material as a comparison group. Out of 2079 potentially relevant articles, 16 met our inclusion criteria. All of the included studies reported that the usage of short-fiber-reinforced composites improved the restoration’s load-bearing capacity. Fifteen of the included publications examined the fracture pattern, and thirteen of them reported a more favorable fracture outcome for the short-fiber-reinforced group. Only one article reported a more favorable fracture pattern for the control group; however, the difference between groups was not significant. Within the limitations of this review, the evidence suggests that short-fiber-reinforced composites can be used effectively as complete restorations to reinforce structurally compromised teeth.

show abstract

Polymerization and shrinkage kinetics and fracture toughness of bulk-fill resin-composites

Cited by 6 publications

References 51 publications

Comparative Evaluation of Preheating versus Sonic Activation of Bulk-Fill Resin Composite

Comparative Evaluation of Preheating versus Sonic Activation of Bulk-Fill Resin Composite

Examining the Impact of Preheating on the Fracture Toughness and Microhardness of Composite Resin: A Systematic Review

Mechanical Performance of Extensive Restorations Made with Short Fiber-Reinforced Composites without Coverage: A Systematic Review of In Vitro Studies

Contact Info

Product

Resources

About