Influence of filler, monomer matrix and silane coating on composite resin adhesion

Păstrav, Mihaela; Moldovan, Mărioara; Chisnoiu, Andrea Maria; Saroși, Codruța; Miuța, Filip; Pastrav, Ovidiu; Delean, Ada Gabriela; Chisnoiu, Radu Marcel

doi:10.24193/subbchem.2021.4.16

Cited by 3 publications

(3 citation statements)

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“…The experimental nanohybrid composite PS2 presents a complex topography, induced by the silica nanoparticles and hydroxyapatite nanoparticles that are organized in a dense structure of submicron clusters, well embedded in the polymer matrix closely surrounding the BaO 2 microfiller particles. This reported dense distribution of filler particles in the polymer matrix induced a slightly increased roughness, which optimally corresponds to the roughness of healthy natural tooth enamel [22,31]. Overall, PS2 presents the most compact nanostructure due to the optimal filler particle embedding, and the HU sample presents some local delamination occurring only for larger submicron clusters.…”

Section: Discussionmentioning

confidence: 72%

“…The nanohybrid structure of CM composite samples after polishing and lustering procedures assures a low value of the surface roughness of about 4 nm. This value is far below that of natural healthy human tooth enamel [22,31], proving the superior finishing properties of the composite. The HU composite presents a uniform topography with the nanofiller being very well distributed in the polymer matrix.…”

Section: Discussionmentioning

confidence: 84%

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Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

Păstrav,

Chisnoiu

et al. 2024

Biomedicines

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(1) Background: the current study investigated three nanohybrid composites: two commercial products ClearfilMajestyTM (CM) and HarmonizeTM (HU), compared with an experimental product PS2. (2) Methods: Two sample types were molded using Teflon dies. The first sample type was represented by standard discs (20 mm diameter and 2 mm thickness) (n = 60, 20/each material), used for surface conditioning investigation, specifically roughness monitoring and color stability analysis using AFM and the CIELab test, respectively. The second sample type was a standard cylindrical specimen (4 mm diameter and 6 mm height) for compression testing (n = 60, 20/each material). After complete polymerization, the samples were ground with sandpaper and further polished. The filler size and distribution in the polymer matrix were investigated with SEM. Data were statistically analyzed using the Anova Test followed by Tukey’s post hoc test on the Origin Lab 2019 software produced by OriginLab Corporation, Northampton, MA, USA. (3) Results: A mono-disperse system was identified in HU samples, while CM and PS2 revealed both nano- and microfiller particles. The samples’ observation after immersion in coffee and tea indicated that a lower roughness combined with optimal filler lamination within the polymer matrix assured the best color preservation. The compression strength was lower for the HU sample, while higher values were obtained for the complex filler systems within CM and PS2. (4) Conclusions: the behavior of the investigated nanohybrid composites strongly depends on the microstructural features.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 84%

Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

Păstrav,

Chisnoiu

et al. 2024

Biomedicines

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“…The hybrid nanoceramic cerasmart 270 is a unique dental material that provides highest degree of flexibility, strength and ensures the best marginal integrity after milling and bonding due to the fully homogenous and evenly distributed nano-ceramic network [6] . The new technology of full coverage silane coating (FSC) of cerasmart 270, strengthens the bonding between resin matrix particles, resulting in exceptional wear resistance, color retention for long-lasting and realistic-looking restorations [7] . Restoring premolars that have undergone endodontic treatment is a contentious topic.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of preparation design on fracture resistance of hybrid-ceramic endo-crown on premolars: An in vitro study

Magdy¹,

Mahallawi²,

Nabil³

2023

Int. J. Appl. Dent. Sci.

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The present study aims to evaluate the effect of different preparation designs on fracture resistance and failure mode of hybrid nanoceramic endocrown on premolars. Methodology: Fourteen endodontically treated maxillary premolars were prepared to receive a hybrid nanoceramic endocrown restorations and divided into 2 groups according to the preparation designs (butt joint and 2 mm ferrule). The endocrown restorations were cemented to the prepared teeth using dual cure adhesive resin cement. All specimens were subjected to a compressive force 5KN until fracture occurs by using universal testing machine. The maximum compressive force was recorded for all specimens, then failure mode of all samples were examined visually and photographically. All repairable samples were examined for extension of the cracks using scanning electron microscope. Results: Endocrowns with ferrule preparation recorded a highly statistically significant difference with the higher mean value of fracture resistance (1911.57 ± 341.29 N), compared to the endocrowns with butt joint which recorded the lower mean value of fracture resistance (1192.70±196.04 N). Regarding the failure mode; endocrowns with ferrule design showed a high percent of catastrophic failure while butt joint showed more repairable failure. Conclusion: Endocrowns with ferrule design showed a higher fracture resistance value but with a high percent of catastrophic failure mode compared to butt joint design that showed lower fracture resistance value with mostly repairable mode of failure.

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