Physicomechanical and thermal analysis of bulk-fill and conventional composites

Nascimento, Armiliana Soares; Rodrigues, José Filipe Bacalhau; Torres, Rodolfo Henrique Nogueira; Santos, Kleilton Oliveira; Fook, Marcus Vinícius Lia; Albuquerque, Mônica Soares de; Lima, Eliane Alves de; Filgueira, Pedro Tardelly Diniz; Santos, João B. M. dos; Oliveira, Leonardo José Rodrigues de; Braz, Rodivan

doi:10.1590/1807-3107bor-2019.vol33.0008

Cited by 16 publications

(12 citation statements)

References 35 publications

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“…Concerning the other types of matrices, they have shown a range of residues comprised between 60.1% (for a UDMA-based biomaterial) and 84.2% (for a Bis-GMAbased biomaterial). 25 Behaviour in a wet environment Bis-GMA-based composite resins and Ormocer materials have similar curves before and after soaking in a humid atmosphere. On the other hand, the curves of the UDMA composite resin are different before and after water ageing, meaning that water imbibition has modified the structure of the RBC and its degradation.…”

Section: Discussionmentioning

confidence: 92%

Thermogravimetric study of the behaviour of organic and inorganic polymers contained in four dental resin-based composites

Canceill

Pages

Garnier

et al. 2020

Polymers and Polymer Composites

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The composition of dental resin-based composite (RBC) matrix is partly responsible for many clinical failures in restorations, which may come from dimensional variation or instability in a wet environment. The objective of this study is therefore to evaluate the thermal stability over time of four dental RBC with different matrices. Silicone cylinders were filled with four different materials and then photopolymerized. To simulate ageing in the buccal environment, half of the samples were placed in a dark place at 37°C for 45 days in sealed compartments containing 2 ml of water. All the RBC produced were subjected to thermogravimetric analysis to measure the loss of mass as a function of temperature. Bis-GMA-based resins and Ormocer materials have similar curves before and after soaking in humid atmosphere. The curves of the UDMA resin are different before and after water ageing, meaning that water imbibition has modified the structure of the composite and its degradation. Even if many curves are similar within the same RBC at different polymerization times or at different pre- and post-ageing times, it is rare to observe a common kinetics between two different composites. Our results show good wet stability of polymerized dental RBC according to the manufacturer’s instructions, although the UDMA-based materials show more variation. It therefore seems that Ormocer resin composite with mass placement have ageing properties that can compete with those of conventional composites whereas those incremented on 2 mm layers are more sensitive to the time necessary for polymerization.

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Section: Discussionmentioning

confidence: 92%

Thermogravimetric study of the behaviour of organic and inorganic polymers contained in four dental resin-based composites

Canceill

Pages

Garnier

et al. 2020

Polymers and Polymer Composites

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“…Strength. Bulk-Fill resin presents excellent conditions of use, which may be related to possible photoinitiators that increase the translucency of the material, thus allowing a greater passage of light, modifications in the inorganic phase, good viscosity of the material which provides a better marginal adaptation, allowing restorations with greater resistance (Nascimento et al, 2019).…”

Section: According Tomentioning

confidence: 99%

Characterization of Bulk-Fill Resin Composites in Terms of Physical, Chemical, Mechanical and Optical Properties and Clinical Behavior

Matos¹,

Nakano²,

Lopes³

et al. 2021

Int. J. Odontostomat.

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This study aims to evaluate the physical, chemical, mechanical and optical properties of Bulk-Fill resin, in relation to the literature and its proper clinical uses. A bibliographic search was performed in the main health databases PUBMED (www.pubmed.gov) and Scholar Google (www.scholar.google.com.br), in which articles published from 1994 to 2020 were collected. Laboratory studies, case reports, systematic reviews and literature reviews, which were developed in living individuals, were included. Therefore, articles that did not deal with the characteristics of the Bulk-Fill resin and its proper clinical uses were excluded. The use of Bulk-Fill resin has been progressively increasing over the years, presenting good properties, achieving success in clinical performance, ease of handling and thus has become the material of choice for dentists. In addition, its longevity demonstrates durability with mechanical properties and resistance to tooth structure. Bulk-Fill resins have characteristics similar to traditional composite resins, when performed according the usage protocol. With the use of this group of resins in a single increment, possible failures that occur during the restorative procedure can be minimized, such as: less chance of incorporating bubbles and a volumetric contraction with less stress on the interface.

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“…In previous studies, the effects of temperature on the fit, stability, internal stress, thickness and impact absorption parameters of some dental polymers have been reported, and it has therefore been proposed that polymers should have similar thermal properties with the dental structure in order to avoid damage to the dental tissues, loss of adhesion, and marginal infiltration [24][25][26]. Furthermore, the knowledge of the thermal properties of dental polymers is essential for predicting performance during materials lifetime, developing the best processing methods, monitoring effects of aging, or troubleshooting when the polymer does not perform as expected [27].…”

Section: Introductionmentioning

confidence: 99%

“…Composition and chemical structure properties have an impact on the mechanical characterization by directly affecting the performance of the polymeric dental products, like enabling the material to better absorb forces, which is important for the clinical success of the restoration [15,24,28]. For this purpose, some reinforcing agents may be used in polymer matrices to transfer occlusal forces from the weak polymeric matrix to the stronger filler material [14].…”

Section: Introductionmentioning

confidence: 99%

Thermal, structural and morphological characterization of dental polymers for clinical applications

et al. 2021

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Purpose: Polymers are used in dentistry on a daily basis due to their mechanical, functional and aesthetic properties. However, such biomaterials are subject to deterioration in the oral environment. Thus, this study aimed to evaluate the structural properties of five commonly used dental polymers to determine their best clinical indications. Methods: Four hundred-fifty samples of five dental polymers (polyethylenterephthalat -glycol modified (PG), polymethyl methacrylate (PA), ethylene vinyl acetate(E), polycarbonate (PC), polyetheretherketone (PK) were prepared to investigate their thermal, structural and chemical characteristics using energy dispersive spectroscopy (EDS), Fourier transform infrared analysis(FTIR), scanning electron microscopy (SEM), differential scanning calorimetry(DSC), thermogravimetric analysis(TGA), X-ray diffraction(XRD), and Shore D hardness test. Data were analyzed using one-way ANOVA, Tukey's HSD, and Levene's tests (α=0.05). Results: PK (87.2) and PA (82.4) displayed the highest hardness values and smooth surfaces, as observed with SEM (p<0.001). Silica was detected in PK, PA, and E by EDS and XRD. The highest glass transition temperature was recorded for PC (145.00±2.00°C) and PK (143.00±1.87°C), while the lowest value was measured for E (50.00±2.12°C)(p<0.001).The highest mass loss was detected for PG (91.40±1.40%) by TGA. Conclusions: PA and PK polymers can be used for stress-containing treatments due to their mechanical properties. These two materials are also advantageous in terms of plaque accumulation as these polymers reveal smoother surfaces than other groups. Insufficient physical and thermal properties require the use of E with caution and only in limited clinical indications.

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Physicomechanical and thermal analysis of bulk-fill and conventional composites

Cited by 16 publications

References 35 publications

Thermogravimetric study of the behaviour of organic and inorganic polymers contained in four dental resin-based composites

Thermogravimetric study of the behaviour of organic and inorganic polymers contained in four dental resin-based composites

Characterization of Bulk-Fill Resin Composites in Terms of Physical, Chemical, Mechanical and Optical Properties and Clinical Behavior

Thermal, structural and morphological characterization of dental polymers for clinical applications

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