Effect of mold type, diameter, and uncured composite removal method on depth of cure

Price, Richard; Harlow, Jessie; Sullivan, Braden

doi:10.1007/s00784-015-1672-4

Cited by 31 publications

(32 citation statements)

References 33 publications

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“…Our results are consistent with previous results, which demonstrated higher DOC for bulk-fill materials when compared with their conventional counterparts. 21 , 22 , 30 …”

Section: Discussionmentioning

confidence: 99%

“…Additional analysis of the resin composite cylinders was performed for all groups to assess the presence of poorly polymerized and soft resin composites, as described in previous studies. 10 , 29 , 30 Each pre-measured resin composite cylinder was subsequently immersed and sonicated (Gyromax 838, Mandel, Amerex Instruments, Inc., Concord, CA, USA) in 5 ml of Methyl-Ethyl-Ketone (MEK) (Sigma Aldrich, MilliporeSigma Co., Oakville, Ontario, Canada) for 2 hours. After sonication, the additional softened resin composite was scraped off.…”

Section: Methodsmentioning

confidence: 99%

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Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin

et al. 2020

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Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin Objectives: To compare the microtensile bond strength (µTBS) and depth of cure (DOC) of bulk-fill composites cured by monowave (MW) and polywave (PW) LED units using different curing times. Methodology: Three composites were tested: Tetric EvoCeram Bulk Fill (TBF), Filtek Bulk Fill (FBF), and Tetric EvoCeram (T; control). Flat dentin surfaces treated with adhesive (AdheSE Universal ® , Ivoclar Vivadent) were bonded with 4 mm cylindrical samples of each bulk-fill composite material (n=6) and cured with monowave (Satelec) or polywave (Bluephase Style) curing units for 10 or 20 seconds. After 24 hours, teeth were sectioned into individual 0.9 mm 2 beams and tested for µTBS. Failure modes were analysed. Moreover, the DOC scrape test (IOS 4090) was completed (n=5) following the same curing protocols. Two-way ANOVA (a=0.05) was performed, isolating light-curing units. Results: For samples cured with the MW light-curing unit, no significant effects were observed in the µTBS results between any of the resin composite brands and the curing times. Conversely, when resins were cured with a PW light unit, a significant effect was observed for TBF resin. In general, bulk-fill composites presented greater DOC and longer curing time resulted in higher DOC for all composites. Conclusion: The µTBS of the composites to dentin was not affected by the curing mode of the resins, except for TBF cured with PW light unit. Bulk-fill composites exhibit greater DOC than conventional resin-based composites.

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“…Our results are consistent with previous results, which demonstrated higher DOC for bulk-fill materials when compared with their conventional counterparts. 21 , 22 , 30 …”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin

et al. 2020

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“…This said, immediate microhardness readings were preferred to facilitate analysis and workflow and, although the results might be lower than after 24 hours storage for example, they follow the same trend (ALSHALI et al, 2015). The use of a metallic matrix was preferred in order to avoid any light transmission and depth of cure overestimation (PRICE et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Mechanical and physical properties assessment of Bulk Fill resin composites

Rizzante¹

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Mechanical and physical properties assessment of Bulk Fill resin composites The achievement of predictable and long lasting adhesive restorations in posterior teeth have always been a major objective of studies in the context of materials and techniques development. The use of bulk fill composites could provide better outcomes, but it is important to assess their physico-mechanical properties, responsible for their clinical behavior. The purpose of the present study was to assess the mechanical and physical properties of bulk fill composites. The composites were divided into 2 groups according to their viscosity. For low viscosity composites, the present study assessed: Surefill SDR flow (SDR), X-tra Base (XB), Filtek Bulk Fill Flowable (FBF), and Filtek Z350XT Flow (Z3Fcontrol); and for high viscosity composites: Tetric Evo Ceram Bulk Fill (TBF), X-tra Fil (XF), Filtek Bulk Fill (FBP), Admira Fusion x-tra (ADM) and Filtek Z350 XT (Z3XT-control). Composites were assessed through shrinkage stress test (using 12 and 24mm 3 of composite in a custom device adapted in an Universal Testing Machine); volumetric shrinkage (using 64mm 3 of composite placed on a Teflon mold and scanned in a micro computed tomography/µCT); Young's modulus (through a 3-point bending test device adapted in an Universal Testing Machine); microhardness and depth of cure tests (using longitudinal Knoop microhardness). All data was evaluated regarding their homogeneity using Shapiro-Wilk test. For polymerization stress, 3-way Variance Analysis (ANOVA) was used. Considering Volumetric Shrinkage, Young's Modulus, Microhardness and Depth of Cure, one-way ANOVA was used. All ANOVA tests were followed by Tukey's test and 5% was adopted as significance level. Shrinkage stress test with 12mm 3 showed SDR, TBF and XF generating the lowest stress after 300s, followed by other high viscosity composites (ADM, FBF, XB and FBP/Z3XT). The regular low viscosity composite (Z3F) generated the highest stress for all assessed times. Considering the same test, with 24mm 3 , after 300s, SDR, FBP and ADM generated similar stress, followed by TBF and XF. Low viscosity bulk fill composites generated lower stress than Z3F. Considering Young's modulus, low viscosity composites (SDR, FBF, XB and Z3F) showed the lowest values, followed by ADM and TBF. The other high viscosity composites (Z3XT, FBP and XF) showed the highest values. For microhardness test, all low viscosity composites showed lower values (FBF being the lowest). For high viscosity composites, Z3XT showed the highest values, followed by XF, FBP/TBF and ADM. Assessing depth of cure, regular composites showed lower values when compared with bulk fill composites. All bulk fill composites showed adequate depth of cure over 4.5mm (microhardness ≥80% of initial reading). SDR and XB showed the highest depth of cure. All high viscosity bulk fill composites generated lower volumetric shrinkage than regular composites. All low viscosity bulk fill composites showed similar volumetric shrinkage when compared to the regula...

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“…O aumento da resistência à flexão de resinas compostas convencionais 46,104,105,112,113,187 e bulk-fill 25 nanodureza, baseado em outros trabalhos publicados anteriormente 43,75,80 .…”

Section: Sem Tratamento Térmicounclassified

“…Dessa forma, apesar de resinas compostas bulk-fill apresentarem grau de conversão aumentado em relação às resinas compostas convencionais, seu uso deve sempre levar em consideração a situação clínica e as peculiaridades de cada caso. Apesar de tal metodologia ter sido utilizada por diversos autores19,31,77,78 , fatores como o operador, a rigidez e a capacidade de corte da espátula75 podem superestimar os resultados79 . Dessa forma, alguns autores têm confeccionado espécimes de comprimento referente à profundidade de cura recomendada pelos fabricantes e sugerido que esta propriedade pode ser avaliada através de uma relação de grau de conversão23,80 ou dureza8,10,12,22,23,59,81 base/topo de no mínimo 0,8, ou 80%.…”

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Grau de conversão, propriedades ópticas e mecânicas de resinas compostas bulk-fill em função de dois aparelhos fotopolimerizadores e de tratamento térmico

Júnior¹

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Effect of mold type, diameter, and uncured composite removal method on depth of cure

Cited by 31 publications

References 33 publications

Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin

Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin

Mechanical and physical properties assessment of Bulk Fill resin composites

Grau de conversão, propriedades ópticas e mecânicas de resinas compostas bulk-fill em função de dois aparelhos fotopolimerizadores e de tratamento térmico

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