The effect of repeated preheating of dimethacrylate and silorane-based composite resins on marginal gap of class V restorations

P, Alizadeh Oskoee; F, Pournaghi Azar; Navimipour, Elmira Jafari; Chaharom, Mohammad Esmaeel Ebrahimi; F, Naser Alavi; Salari, Ashkan

doi:10.15171/joddd.2017.007

Cited by 14 publications

(13 citation statements)

References 37 publications

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“…In this context, Fores-Salgado et al ( 13 ) and Elsayad ( 14 ) reported better adaptation and lower marginal gaps with preheating of composite resins. In a study by Alizade Oskoee et al , the formation of gaps at the gingival margins of Cl V cavities decreased with the preheating technique ( 15 ).…”

Section: Discussionmentioning

confidence: 99%

The effect of composite resin preheating on marginal adaptation of class II restorations

et al. 2020

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Background One of the problems with a high filler content composite resins is gap formation at restorative material–tooth interface. The present study investigated the effect of preheating composite resins on the formation of marginal gap in Cl II restorations. Material and Methods In this in vitro study Sixty Cl II cavities were prepared on the mesial and distal surfaces of 30 extracted premolar teeth. The gingival floor of cavities was placed 1 m below the CEJ. The samples were randomly allocated to 4 groups for restoration placement: group 1, Filtek P60 composite resin at room temperature; group 2, Filtek P60 composite resin at 68°C; group 3, X-tra fil composite resin at room temperature; and group 4, X-tra fil composite resin at 68°C. After a thermocycling procedure, the teeth were sectioned longitudinally in a buccolingual direction. Then the marginal gaps of the samples were measured at proximal and gingival margins under a scanning electron microscope at ×2000 magnification in µm. The data were analyzed with SPSS 21, using one-way ANOVA, post hoc Tukey tests and paired t-test (α=0.05). Results Groups 2 and 4 exhibited significantly lower marginal gaps, compared to groups 1 and 3, at both enamel ( P <0.0001 and P =0.001, respectively) and dentinal walls ( P <0.0001). In all the groups, there was significantly less marginal gaps at composite-enamel wall compared to composite-dentin wall interfaces ( P <0.0001). There was no significant difference between groups 1 and 3 and groups 2 and 4 in enamel walls ( p = 0.96, p = 0.99 respectively) and dentinal walls ( p = 0.85, p =0.98 respectively). Conclusions Preheating resulted in a decrease in marginal gaps in both composite resins. The effect of composite resin type on marginal adaptation was the same. Key words: Composite resin, dental marginal adaptation, preheating.

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Section: Discussionmentioning

confidence: 99%

The effect of composite resin preheating on marginal adaptation of class II restorations

et al. 2020

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“…Preheating time varied significantly from 20 s to 1 h; 5 min 3,11,15,20 ( n = 4), 15 min 13,29,36,41 ( n = 4), and 10 min 21,23,35 ( n = 3) were the most frequently reported. Microhardness 3,14,16,17,21,27,34,36,40,44 ( n = 10) was the most assessed property, followed by marginal adaptation 20,23–25,29,37,42,43,45 ( n = 9), conversion degree 13,15,19,24,28,34,46–48 ( n = 9), and flexural strength 18,21,24,26,35,36,39,41,42 ( n = 9). Scanning electron microscopy 20,24,25,42,43 ( n = 5) was the most used marginal adaptation measurement, followed by stereomicroscopy 23,45 ( n = 2) and confocal microscopy 25 ( n = 1), digital microscopy 29 ( n = 1), and optical microscopy 37 ( n = 1).…”

Section: Resultsmentioning

confidence: 99%

“…The parameters least described in the methodology were operator blinding and sample size calculation. Most studies were classified as medium risk of bias 3,11–15,17,19,21,24,26,29,30,36,37,39,41,45,46,48,50 ( n = 21), followed by low 16,20,23,25,27,28,33–35,39,43,47 ( n = 13) and high risks 18,22,44,46,49 ( n = 5).…”

Section: Resultsmentioning

confidence: 99%

Preheating of dental composite resins: A scoping review

Patussi

Ramacciato

Silva

et al. 2022

J Esthet Restor Dent

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Objective: The aim of this scoping review was to analyze the available evidence on the preheating process and its effects on physicochemical properties of composite resins. Materials and Methods:A systematic search was performed in August 2021 using PubMed/Medline, Embase, Scopus, and ISI Web of Science databases and gray literature without language or date restriction. Inclusion criteria were in vitro studies that assessed the physicochemical properties and marginal adaptation of preheated composite. Exclusion criteria were studies with experimental composite, literature reviews, clinical studies. Data from selected studies were qualitatively analyzed.Results: In total, 104 studies were found from which 39 were included. The most used composite resin was Filtek Z350 XT (3 M/ESPE), preheated at 68 C in a Calset device (AdDent Inc., Danbury, CT, USA) for 5 or 15 min. Most studies showed decreased viscosity, increased conversion degree and microhardness of composite resins, and better marginal adaptation of direct and indirect restorations. Also, flexural strength was not affected, and data about bond strength were inconclusive due to heterogeneity among studies. Conclusion:The parameters used for preheating composite resins are heterogeneous. Preheating decreased viscosity, increased the conversion degree and microhardness of composite resins, and improved the marginal adaptation of direct and indirect restorations.Clinical Significance: The analysis of evidence showed a high heterogeneity among preheating protocols. Preheating may benefit the handling and physicochemical properties of composite resins.

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“…Pre-heating was performed using warm bath equipped with thermostatic control (TELEDYNE HANAU, Buffalo, NY, USA). The material temperature was measured using digital microprobe GBC KDM 350, KON (EL CO SPA, Milano, Italy) ( 11 ). The heating time was 5 minutes based on the pilot study.…”

Section: Methodsmentioning

confidence: 99%

The effect of pre-heating on monomer elution from bulk-fill resin composites

et al. 2020

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Background The present study was aimed to evaluate the effect of pre-heating of bulk -fill resin composites on monomer elution from them. Material and Methods Three different types of resin composites were used including Tetric N-Ceram Bulk Fill, X-tra Fill and X-tra Base. 10 cylindrical samples were prepared from each resin composites. Before light curing, 5 samples were pre-heated until reaching 68˚C, then 5 other samples were polymerized at room temperature. After 24 hours, release of UDMA, TEGDMA and BIS-GMA monomers were measured by High-Performance Liquid Chromatography analysis. Data analysis was performed by two-way ANOVA test, Games-Howell and Sidak post hoc tests. Results Pre-heating did not have any statistically significant effect on the mean values of UDMA, TEGDMA and Bis-GMA elution ( p >0.05). The greatest amount of released Bis-GMA and UDMA was obtained from Tetric N-Ceram Bulk-fill composite. The greatest amount of released TEGDMA was obtained from X-tra Fill composite. X-tra Base composite showed the lowest amount of monomer release ( P <0.001). Conclusions Pre-heating did not have any effect on monomer release from bulk-fill resin composites. Moreover, the amount and the type of monomers released from various bulk-fill resin composites were not similar. Key words: Bulk fill composite resin, elution, HPLC, residual monomer, temperature.

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The effect of repeated preheating of dimethacrylate and silorane-based composite resins on marginal gap of class V restorations

Cited by 14 publications

References 37 publications

The effect of composite resin preheating on marginal adaptation of class II restorations

The effect of composite resin preheating on marginal adaptation of class II restorations

Preheating of dental composite resins: A scoping review

The effect of pre-heating on monomer elution from bulk-fill resin composites

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