Contraction stress of low-shrinkage composite materials assessed with different testing systems

Marchesi, Giulio; Breschi, Lorenzo; Antoniolli, Francesca; Lenarda, Roberto Di; Ferracane, Jack L.; Cadenaro, Milena

doi:10.1016/j.dental.2010.05.007

Cited by 103 publications

(77 citation statements)

References 32 publications

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“…These methods include incremental placement of the restoration, soft start curing technique, the use of stress absorbing cavity liners and modification in the material composition [2,21,22]. Polymerization shrinkage for monomers such as Bis-GMA and TEGDMA had been found to be substantially higher than the typically filled composites [13,23].…”

Section: Introductionmentioning

confidence: 99%

“…TCD-DI-HEA was also introduced as a low shrinking monomer and it was incorporated in Venus diamond material from Haeraus Kulzer GmbH, Germany. This low viscosity monomer has a rigid back bone that results in low shrinking behavior [22,34,35]. In addition, ethoxylated bisphenol A dimethacrylate (Bis-EMA) which is a Bis-GMA analog with lower viscosity due to the absence of hydroxyl groups from its structure was introduced for a similar purpose.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2016

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“…Previous research supports this point in that low volumetric shrinkage does not necessarily correspond to a low polymerization stress development. 2,5 Marchesi and others 22 support this assumption, as they have revealed no significant difference between Filtek P90 and Filtek Z250 in the recorded shrinkage stresses after five minutes. Additionally, the microtensile results recorded by Van Ende and others 27 failed to confirm that silorane resin composite (Filtek P90) induces less stress at the adhesive interface compared with methacrylate resin.…”

Section: E-46mentioning

confidence: 81%

“…The cationic ring opening of oxirane moieties in the silorane-based composite yields a reduced volumetric shrinkage 21,22 in contrast to the free radical addition reaction of the double bonds of the dimethacrylate-based composite. 4,7,23 When acidic cations attack the oxirane rings, the cleavage and opening of these rings gain space, thus counteracting the loss of volume occurring in the subsequent step when covalent bonds are formed.…”

Section: E-46mentioning

confidence: 99%

Effect of Using Silorane-based Resin Composite for Restoring Conservative Cavities on the Changes in Cuspal Deflection

Shabayek

Mobarak

2013

Operative Dentistry

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After five minutes of curing, the change in the organic matrix of the resin composite using silorane has a positive effect on controlling the cumulative cuspal deflection. SUMMARYObjective: To investigate the effect of using two resin-composite materials for restoring conservative mesio-occluso-distal (MOD) cavities on the changes (incremental and cumulative) in cuspal deflection.Methods: Forty extracted sound human maxillary second premolars were subjected to standardized MOD cavity preparation and then divided into two groups (n=20).

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“…However, stress (S) is determined by multiplying the volumetric shrinkage (VS) by the modulus of elasticity (E) of the material (S=VS×E). The silorane-based composite has been shown to have a modulus of elasticity similar to that of methacrylatebased composites 23) . In the present study, we believe that, irrespective of the similarity in the modulus of elasticity between the two composites, the polymerization shrinkage of the methacrylate monomers led to an increase in polymerization stress, and disrupted some parts of the restoration margins.…”

Section: Discussionmentioning

confidence: 99%

Effect of thermo-mechanical load cycling on silorane-based composite restorations

et al. 2012

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The aim of this study was to compare the formation of marginal gaps after thermo-mechanical load cycling, between siloranebased and methacrylate-based restorations. Standardized class II cavities were made in 10 permanent human third molars that were restored with the adhesive system Clearfil SE Bond+composite Filtek Z-350 (Methacrylates) and with the composite bonding Filtek P90+P90 (Siloranes), respectively. After 24 h of storage in 100% humidity at 37°C, the restoration margins were stained, photographed, and evaluated. The gap length was calculated as the percentage of the total length of the margins. Thereafter, the specimens were tested by a thermo-mechanical machine and the marginal gap formation of the specimens was re-evaluated. The results were expressed as percentages of gaps and were submitted to a Mann Whitney test at 5% level of significance. Methacrylates showed a statistically significant higher percentage of gaps than Siloranes, both before and after cycling.

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Contraction stress of low-shrinkage composite materials assessed with different testing systems

Cited by 103 publications

References 32 publications

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

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

Effect of Using Silorane-based Resin Composite for Restoring Conservative Cavities on the Changes in Cuspal Deflection

Effect of thermo-mechanical load cycling on silorane-based composite restorations

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