Water sorption and mechanical properties of light-cured proprietary composite tooth restorative materials

Kalachandra, S.; Wilson, Thomas W.

doi:10.1016/0142-9612(92)90004-8

Cited by 80 publications

(59 citation statements)

References 17 publications

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“…Although there may be no considerable absorption of water by the filler particles themselves, resins take up more water and the most probable site for accommodation of additional water is the interface between the inorganic filler particles and the resin matrix. It seems that water diffuses through the resin and reacts with the filler at the filler-matrix interface 41) . Such a diffusion process requires a longer time as opposed to a reaction at the specimen surface, which occurred in the current study.…”

Section: Discussionmentioning

confidence: 99%

Sorption and solubility of luting cements in different solutions

Meşe¹,

Burrow²,

Tyas³

2008

Dent. Mater. J.

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This study examined the solubility, sorption, and dimensional change of eight luting cements in two different solutions: 50% ethanol:water and distilled water. Ten disk specimens were prepared of each material following the manufacturers ' instructions, and then ground with silicone carbide paper. Sorption and solubility were calculated by weighing the specimens before and after immersion and desiccation. Data were analyzed by two-way ANOVA, Tukey ' s HSD and Fisher ' s PLSD tests. GC Fuji Plus and RelyX Luting2 showed the highest values of sorption and solubility both in water and ethanol:water. The percentage changes in volume for Maxcem, Nexus 2, Panavia F, RelyX Veneer, and VariolinkII were considerably smaller than for GC Fuji Plus, RelyX Luting2, and seT in both water and ethanol:water and after desiccation. Stability occurred within 2 weeks for all the eight materials when in water, while GC Fuji Plus, Maxcem, Panavia F and seT took 3 to 4 weeks to stabilize in ethanol:water.

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Section: Discussionmentioning

confidence: 99%

Sorption and solubility of luting cements in different solutions

Meşe¹,

Burrow²,

Tyas³

2008

Dent. Mater. J.

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“…11,[13][14][15][16][17] In the current study, the percentage of mass variation was used to determine Wsp and Wsl after 28 days. CX and ND showed the lowest Wsp rates for this period.…”

Section: Statistical Analysesmentioning

confidence: 99%

Do new matrix formulations improve resin composite resistance to degradation processes?

et al. 2013

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The aim of this study was to determine the degradation resistance of three new formulations-silorane-, Ormocer-and dimer-acidbased materials-and compare them to the traditional dimethacrylatebased materials. One silorane-(Filtek P90, P90), one Ormocer-(Ceram-X, CX), one dimer-acid-(N'Durance, ND) and two dimethacrylate-based (Filtek P60, P60; Tetric Ceram, TC) materials were investigated. Water sorption (Wsp) and solubility (Wsl) were determined after the materials were immersed in water for 28 days. Knoop hardness (KH) was determined before and after 24 h immersion in pure ethanol. The flexuralstrength (FS) was determined by the bending test after one-week storage in a dry environment or after one-week immersion in pure ethanol. Data were submitted to analysis of variance (ANOVA) and Tukey's test (95%). The three new formulations showed lower Wsp than the dimethacrylatebased formulation. CX (0.50 ± 0.17%) and ND (0.72 ± 0.19%) exhibited the lowest Wsp, whereas P90 (0.02 ± 0.03%) and P60 (0.04 ± 0.03%) showed the lowest Wsl. All resins showed reduced Knoop hardness number (KHN) after ethanol immersion. P60 presented the lowest decrease in KH value (19 ± 5%). TC (48 ± 3%) and P90 (39 ± 9%) showed the highest KHN decrease after ethanol storage. The FS of CX, ND and TC were affected by ethanol storage. The new formulations did not improve the degradation resistance, as compared with the traditional methacrylatebased materials.

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“…6,7 Aging studies show different results in terms of the effect of prolonged water immersion on strength.…”

Section: Discussionmentioning

confidence: 99%

“…5 Composite degradation in the oral environment is the result of water molecules penetrating the polymer chains, releasing residual monomers and weakening the secondary bonds, as well as the degradation of the filler-matrix interface. 6,7 Water sorption initiates as soon as the composite comes into contact with oral fluids and, according to in vitro studies, a significant change in mass is detected between three to five days of immersion. 3,6 The amount of absorbed water depends on the composite organic and inorganic composition, as well as its degree of conversion.…”

Section: Introductionmentioning

confidence: 99%

Correlação entre sorção de água e resistência à fl exão biaxial em compósitos restauradores

Gushiken

Fróes-Salgado

Braga

2014

Clin. Lab. Res. Dent.

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Though aging of resin composites has been the subject of several investigations, the correlation between strength and water uptake has not been established. Therefore, the purpose of the present study was to determine whether a statistically signifi cant correlation exists between biaxial fl exural strength and weight gain due to water uptake for two commercial restorative composites, one methacrylate-based and one silorane-based. Discs (15 mm in diameter by 1 mm thick) were made with either Filtek Z250 or Filtek Silorane (both from 3M ESPE) and dry-stored for 30 days. Then, they were weighed in an analytical balance and immersed in distilled water at 37°C for 1, 2, 5, 7, 30 or 60 days (n = 10). After the immersion period, the discs were re-weighed and immediately fractured on a "piston-on-three-ball" device. Mass gain (in percentage) and biaxial fl exural strength data were subjected to two-way ANOVA / Tukey test and Pearson's correlation analysis (α = 5%). Mass gain was similar for both composites in a given storage period, and did not vary signifi cantly between one and seven days. For Filtek Z250, biaxial strength decreased gradually with prolonged immersion, while, for Filtek Silorane, it decreased abruptly between 30 and 60 days. Statistically signifi cant correlations were found between strength and mass gain for both composites. However, a stronger correlation was found for Filtek Z250 (r = -0.706, p < 0.001) compared to Filtek Silorane (r = -0.361, p < 0.01). Therefore, it was possible to conclude that strength is linearly related to water uptake and this correlation is material-dependent.Composite Resins; Silorane Resins; Water; Dental Materials / analysis.Correlação entre sorção de água e resistência à fl exão biaxial em compósitos restauradores • Embora o envelhecimento de compósitos resinosos tenha sido o objeto de investigação de diversos estudos, a correlação entre resistência e sorção de água não foi estabelecida. Portanto, o objetivo do presente estudo foi verifi car se existe uma correlação estatisticamente signifi cativa entre a resistência à fl exão biaxial e o ganho de peso devido a sorção de água para dois compósitos comerciais, um à base de metacrilatos e outro à base de silorano. Discos (15 mm de diâmetro por 1 mm de espessura) foram confeccionados com Filtek Z250 ou Filtek Silorane (ambos da 3M ESPE) e armazenados a seco por 30 dias. Em seguida, eles foram pesados em uma balança analítica e imersos em água destilada a 37°C por 1, 2, 5, 7, 30 ou 60 dias (n = 10). Após o período de imersão, os discos foram novamente pesados e imediatamente fraturados em um dispositivo do tipo "pistão sobre três esferas". Os dados de ganho de massa (em porcentagem) e resistência à fl exão biaxial foram submetidos a ANOVA de dois fatores / teste de Tukey e teste de correlação de Pearson (a = 0,05). O ganho de massa foi semelhante para os dois compósitos para um dado período de armazenamento e não variou significativamente entre um e sete dias. Para o Filtek Z250, a resistência diminuiu gradualmente com a ime...

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Water sorption and mechanical properties of light-cured proprietary composite tooth restorative materials

Cited by 80 publications

References 17 publications

Sorption and solubility of luting cements in different solutions

Sorption and solubility of luting cements in different solutions

Do new matrix formulations improve resin composite resistance to degradation processes?

Correlação entre sorção de água e resistência à fl exão biaxial em compósitos restauradores

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