Effect of decontamination on micro‐shear bond strength of silorane‐based composite increments

Sheikh-Al-Eslamian, Seyedeh Mahsa; Panahandeh, Narges; Najafi-Abrandabadi, Ahmad; Hasani, Elham; Torabzadeh, Hassan; Ghassemi, Alireza

doi:10.1111/jicd.12196

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…These hydrophobic composites polymerize via a cationic, ring opening mechanism, which is not sensitive to oxygen inhibition. The siloxane core attached to the oxirane rings is responsible for the hydrophobicity of this molecule [ 1 2 3 4 ]. The stress compensation mechanism in this new composite system is due to the opening of the oxirane ring during the process of polymerization [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

et al. 2017

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ObjectivesThis study assessed the effect of water storage on the flexural strength (FS) of low shrinkage composites.Materials and MethodsA total of 165 bar-shaped specimens (2 × 2 × 25 mm) were fabricated of 2 low shrinkage composites (Filtek P90 [3M ESPE], GC Kalore [GC International]) and a conventional methacrylate-based composite (Filtek Z250 [3M ESPE]). The specimens were subjected to 3-point bending test at 6 time intervals, namely: immediately after curing, at 24 hours, 1 week, 1 month, 6 months, and 1 year following storage in wet and dry conditions. The FS of the specimens were measured by applying compressive load at a crosshead speed of 1.0 mm/min. Data was analyzed using 3-way analysis of variance (ANOVA) and Tukey's test.ResultsThree-way ANOVA revealed significant interactions between time, type of composite, and storage condition (p = 0.001). Tukey's multiple comparison test revealed significant reductions in FS of all composites after 6 months and 1 year of storage in distilled water compared to dry condition.ConclusionsFiltek P90 showed the highest and GC Kalore showed the lowest FS after 1 year storage in distilled water. The immediate high strength of Filtek Z250 significantly decreased at 1 year and its final value was lower than that of Filtek P90.

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Section: Introductionmentioning

confidence: 99%

Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

et al. 2017

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Contamination of Resin-Matrix Composites on Chairside Handling Using Latex or Nitrile Gloves: An In Vitro Study

Cunha,

Torres,

Fidalgo-Pereira

et al. 2023

Biomedical Materials & Devices

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The aim of this study was to evaluate the effect of different gloves and clinical environment on the contamination of resin-matrix composites for restorative dentistry. Specimens of nano-hybrid resin-matrix composite (n = 6) were divided in groups regarding the handling with (A) clinical spatula; (B) latex gloves; (C) latex or (D) nitrile gloves with human saliva; (E) latex or (F) nitrile gloves with human blood. After light curing, groups of specimens were analyzed by optical microscopy at magnification ranging from x30 up to x500 and by scanning electron microscopy at different magnification ranging from x50 up to x8000. Handling of resin-matrix composites with unpowdered nitrile gloves or clinical spatulas avoided the presence of contaminants. However, agglomerates of the resin-matrix composite itself became entrapped leading to a heterogenous morphological aspect. SEM images revealed the presence of corn-derived starch released from the powdered gloves. Also, the formation of micro-spaces (voids) occurred after handling with powdered latex gloves. Specimens handled with both type of gloves contaminated with saliva showed a conditioning layer composed of glycoproteins rolls and compounds including calcium-based chlorides, phosphates, and carbonates. Also, blood products were transferred from the contaminated gloves to the resin-matrix composites after handling. Thus, resin-matrix composite restorations are susceptible to contamination with debris from powdered gloves. Also, saliva or blood debris become adsorbed and entrapped in the resin-matrix composites during clinical handling leading to the presence of defects such macro- and micro-scale voids or contaminant agglomerates.

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Effect of decontamination on micro‐shear bond strength of silorane‐based composite increments

Abstract: Decontamination by water and air spray, etching, and bonding was effective in restoring the bond strength of silorane-based composite increments.

Cited by 2 publications

References 17 publications

Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

Contamination of Resin-Matrix Composites on Chairside Handling Using Latex or Nitrile Gloves: An In Vitro Study

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