Aspects of water sorption from the air, water and artificial saliva in resin composite restorative materials

Musanje, L.; Darvell, B.W.

doi:10.1016/s0109-5641(02)00085-4

Cited by 76 publications

(61 citation statements)

References 30 publications

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“…Furthermore, water absorption and release can cause molecular instabilities, which may lead to crack formations and a decrease in mechanical properties as already mentioned. 28 Water absorption not only affects physical and mechanical properties, especially of composite resins but also decreases surface hardness and the elastic modulus, 4 particularly as reflected in this study.…”

Section: Discussionmentioning

confidence: 65%

“…Unsurprisingly, longer storage times resulted in increased water absorption rates, which is corroborated by the composite resin results from a previous study. 4 However, in the case of distilled water and even artificial saliva, water absorption was dependent on storage time and material. 4 Our results support the concept that water absorption generally increases with higher amounts of resin matrix and a lower amount of filler particles.…”

Section: Discussionmentioning

confidence: 99%

“…4 However, in the case of distilled water and even artificial saliva, water absorption was dependent on storage time and material. 4 Our results support the concept that water absorption generally increases with higher amounts of resin matrix and a lower amount of filler particles. Since the latter cannot absorb water, higher matrix proportions can lead to filler-matrix debonding or even hydrolytic degradation.…”

Section: Discussionmentioning

confidence: 99%

“…Since the latter cannot absorb water, higher matrix proportions can lead to filler-matrix debonding or even hydrolytic degradation. 4,5,32 In…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3] Polymer networks, in particular, tend to absorb water from the surroundings depending on their specific hydrophilicity and on the humidity of the mouth. 4,5 Potential deleterious effects may arise from pH changes due to cariogenic biofilms in the oral ecology, diet intake, and different enzymes. 6 This can lead not only to esthetic problems in terms of water absorption and discoloration but also to the mechanical weakening of the materials and decreased fracture resistance or increased wear.…”

Section: Introductionmentioning

confidence: 99%

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Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Liebermann

Wimmer

Schmidlin

et al. 2016

The Journal of Prosthetic Dentistry

169

126

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STATEMENT OF PROBLEM: Polyetheretherketone (PEEK) can be used to support fixed dental prostheses. However, information about physicomechanical characterization is still scarce. PUR-POSE: The purpose of this in vitro study was to assess effects of different aging regimens/durations on roughness, solubility, water absorption, Martens hardness (HM), and indentation modulus/EIT on different computer-aided design and computer-aided manufacturing (CAD/CAM) polymers. MATERIAL AND METHODS: Forty standardized specimens of the following materials were fabricated: PEEK: Dentokeep (DK); hybrid material: VITA Enamic (EN); composite resins: LAVA Ultimate (LU) and an experimental CAD/CAM nanohybrid-composite resin (EX); poly(methyl methacrylate) (PMMA)-based: VITA CAD-Temp (CT); Telio CAD (TC), artBloc Temp (AT), and ZENOTEC ProFix (ZP). A nanofilledpolymer for interim restorations, Protemp 4 (CG), served as the control group. Specimens were stored in sodium chloride, artificial saliva, physiological saliva, and distilled water at 37°C for 1, 7, 14, 28, 90, and 180 days. Roughness, water absorption, HM, and EIT were investigated after each storage period; solubility was determined after 180 days only. Data were analyzed using weighted 3/2/1-way ANOVA and the post hoc Scheffé tests (=.05). RESULTS: Storage media had no effect on surface roughness and water absorption. Physiological saliva revealed the highest significant impact on solubility followed by artificial saliva, sodium chloride, and distilled water. Water absorption increased significantly with storage duration. PEEK showed the lowest solubility and water absorption values. The highest solubility was observed for the conventional polymer CG, and the highest water absorption was found for the composite LU. PMMA-based TC, ZP, CG, and AT showed the lowest HM and indentation modulus, followed by CT, and PEEK. The highest values were observed for the hybrid material EN, followed by LU and EX. CONCLUSIONS: The hardness parameters of PEEK were comparable with those of PMMA-based materials. group. Specimens were stored in sodium chloride, artificial saliva, physiological saliva, and distilled water at 37°C for 1, 7, 14, 28, 90, and 180 days. Roughness, water absorption, HM, and E IT were investigated after each storage period; solubility was determined after 180 days only. Data were analyzed using weighted 3/2/1-way ANOVA and the posthoc Scheffé tests (α=05).Results. Storage media had no effect on surface roughness and water absorption.Physiological saliva revealed the highest significant impact on solubility followed by artificial saliva, sodium chloride, and distilled water. Water absorption increased significantly with storage duration. PEEK showed the lowest solubility and water absorption values. The highest ! ! ! 2! solubility was observed for the conventional polymer CG, and the highest water absorption was found for the composite LU. PMMA-based TC, ZP, CG, and AT showed the lowest HM and indentation modulus, followed by CT, and PEEK. The highest values were ...

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Since the latter cannot absorb water, higher matrix proportions can lead to filler-matrix debonding or even hydrolytic degradation. 4,5,32 In…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Liebermann

Wimmer

Schmidlin

et al. 2016

The Journal of Prosthetic Dentistry

169

126

View full text Add to dashboard Cite

show abstract

Introduction

Darvell

2021

Endodontic Materials in Clinical Practice

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The impact of long‐term aging in artificial saliva media on resin‐based dental composite strength

et al. 2022

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Although salivary liquid can degrade constituents in resin-based dental composites in short-term incubations, there is a knowledge gap on how longer-term aging impacts their bulk strength. We address this through extended aging studies with resin-based dental composites in different environments. Two commercial composites (FIL and AEL) were aged aseptically at 37 C in air (A, control), artificial saliva (AS), and esterase enzyme amended AS (EAS). Diametral and pushout strength were measured after periods of 120-180 days. At 120 days, the diametral strength of composites aged in air was 69.9 ± 11.0 and 57.7 ± 3.31 MPa in FIL and AEL, respectively. These were significantly greater compared to composites aged in AS (32.1 ± 7.01 and 46.2 ± 9.38 MPa in FIL and AEL, respectively) or EAS (36.7 ± 8.49 and 43.5 ± 5.51 MPa in FIL and AEL, respectively). In contrast, pushout strength for both composites were smaller in A compared to those aged in AS and EAS, results attributed to AS absorption and polymer expansion. No significant change in either diametral or pushout strength occurred after 120 days. There was no significant difference between aging in AS and EAS, suggesting that esterase did not significantly decrease the bulk material strength to a greater extent than AS under the test conditions. Aqueous diffusivities for the composites ranged from 8.4 to 11 Â 10 À13 m 2 /s, with associated porosities ranging from 0.06% to 0.10%. These results indicate that saturation of a typical dental composite occurs over a time frame of 4-5 months, longer than typical aging studies. Together, the results demonstrate the importance of aging time on composite strength.

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Aspects of water sorption from the air, water and artificial saliva in resin composite restorative materials

Cited by 76 publications

References 30 publications

Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Introduction

The impact of long‐term aging in artificial saliva media on resin‐based dental composite strength

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