From vulcanite to vinyl, a history of resins in restorative dentistry

Rueggeberg, Frederick A.

doi:10.1067/mpr.2002.123400

Cited by 156 publications

(119 citation statements)

References 58 publications

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“…[21][22][23] According to the manufacturers' information, LuxaCore  -Dual presents 72% (wt) of filler particles in its composition, while FluoroCore  2 and Rely X ARC present a filler content of approximately 65% and 67.5% (wt), respectively. Moreover, both LuxaCore  -Dual and FluoroCore  2 present UDMA in their composition, while Rely X ARC composition is based on TEGDMA and Bis-GMA monomers.…”

Section: Discussionmentioning

confidence: 99%

Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

et al. 2010

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This study evaluated the Knoop Hardness (KHN) values of two dual-cured composite resin core build-up materials and one resin cement exposed to different curing conditions. Two dual-cured core buildup composite resins (LuxaCore  -Dual, DMG; and FluoroCore  2, Dentsply Caulk), and one dual-cured resin cement (Rely X ARC, 3M ESPE) were used in the present study. The composite materials were placed into a cylindrical matrix (2 mm in height and 3 mm in diameter), and the specimens thus produced were either light-activated for 40 s (Optilux 501, Demetron Kerr) or were allowed to self-cure for 10 min in the dark (n = 5). All specimens were then stored in humidity at 37°C for 24 h in the dark and were subjected to KHN analysis. The results were submitted to 2-way ANOVA and Tukey's post-hoc test at a pre-set alpha of 5%. All the light-activated groups exhibited higher KHN values than the self-cured ones (p = 0.00001), regardless of product. Among the self-cured groups, both composite resin core build-up materials showed higher KHN values than the dual-cured resin cement (p = 0.00001). LuxaCore  -Dual exhibited higher KHN values than FluoroCore  2 (p = 0.00001) when they were allowed to self-cure, while no significant differences in KHN values were observed among the light-activated products. The results suggest that dual-cured composite resin core build-up materials may be more reliable than dual-cured resin cements when curing light is not available.

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Section: Discussionmentioning

confidence: 99%

Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

et al. 2010

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“…Polymerization shrinkage for monomers such as Bis-GMA and TEGDMA had been found to be substantially higher than the typically filled composites [13,23]. There is a direct relation between the increase in filler loading and the reduction in polymerization shrinkage [24][25][26]. The incorporation of pre-polymerized resin fillers (organic fillers) decreases the volume fraction of the polymerizable resin and increases the filler volume fraction resulting in reduction of the polymerization shrinkage.…”

Section: Introductionmentioning

confidence: 99%

Polymerization shrinkage kinetics and shrinkage-stress in dental resin-composites

2016

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Shrinkage-strainShrinkage-stress Strain rate Modulus of elasticity Bulk-fill a b s t r a c tObjectives. To investigate a set of resin-composites and the effect of their composition on polymerization shrinkage strain and strain kinetics, shrinkage stress and the apparent elastic modulus.Methods. Eighteen commercially available resin-composites were investigated. Three specimens (n = 3) were made per material and light-cured with an LED unit (1200 mW/cm 2 ) for 20 s. The bonded-disk method was used to measure the shrinkage strain and Bioman shrinkage stress instrument was used to measure shrinkage stress. The shrinkage strain kinetics at 23 • C was monitored for 60 min. Maximum strain and stress was evaluated at 60 min. The shrinkage strain rate was calculated using numerical differentiation. Significance. The nature of the monomer system determines the amount of the bulk contraction that occurs during polymerization and the resultant stress. Higher values of shrinkage strain and stress were demonstrated by the investigated flowable materials. The bulk-fill materials showed comparable result when compared to the traditional resin-composites.

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“…A study about additional post-heat curing 15) demonstrated that application of heat above the glass transition temperature of the resin matrix can enhance the degree of monomer conversion and improve the mechanical properties of the composite. In addition, an increased biocompatibility of the resin composite after additional post-heat treatment was shown to occur 16,17) . For these reasons, post-curing might be efficient on the color stability of resin composites.…”

Section: Introductionmentioning

confidence: 99%

Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites

et al. 2013

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The purpose was to determine the short and long term effects of polishing systems and post-heat-light curing on the color stability of nano-composites. The disc shaped samples (ø=10 mm, h=3 mm) were prepared. Forty subgroups (n=5) were designed according to two different curing conditions and five different polishing methods. Color change measurements were performed on the day of specimen preparation (base) and repeated after 1 and 7 months of water storage. MANOVA and Tukey's post hoc tests were applied (p<0.05). While the color difference values of resin composites were ranked as EXP2>EXP1>CME≥XTE after 1 month (p<0.05), after 7 months the ranking was EXP2≥EXP1>XTE>CME (p<0.05). Type and compositions of nano-composites may be important on the long-term color stability of the restoration. Additional post-heat-light curing of nano-composites may produce higher color change than the hand-light curing protocol. Consequently, the polishing procedures should be applied to obtain more resistant composite surface to discoloration.

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From vulcanite to vinyl, a history of resins in restorative dentistry

Cited by 156 publications

References 58 publications

Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

Polymerization shrinkage kinetics and shrinkage-stress in dental resin-composites

Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites

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