Influence of UEDMA, BisGMA and TEGDMA on selected mechanical properties of experimental resin composites

Asmussen, Erik; Peutzfeldt, Anne

doi:10.1016/s0109-5641(98)00009-8

Cited by 421 publications

(357 citation statements)

References 20 publications

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“…The differences in the material behavior with the regard to the polymerization strain, polymerization kinetics, polymerization stress and modulus of elasticity could be explained by the fact that the differences in the monomer system is covered up by many other differences in the material composition d e n t a l m a t e r i a l s x x x ( 2 0 1 6 ) xxx-xxx such as the filler amount and type, initiator, silanization. However, this does not indicate the insignificance of the monomer system [77].…”

Section: Discussionmentioning

confidence: 75%

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: Discussionmentioning

confidence: 75%

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

2016

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“…The latter can be due to low viscosity of UDMA resin, which increases the mobility of monomers 20 . It was found that adding TEGDMA to the resin will improve mechanical properties by increasing the molecular mobility and degree of conversion up to 70% 39 . However, it has been shown that low microhardness associated with higher TEGDMA concentration may be related to its hydrophilicity 39 .…”

Section: Discussionmentioning

confidence: 99%

“…It was found that adding TEGDMA to the resin will improve mechanical properties by increasing the molecular mobility and degree of conversion up to 70% 39 . However, it has been shown that low microhardness associated with higher TEGDMA concentration may be related to its hydrophilicity 39 . In the contrary, it has been shown previously that nanofilled resin composite gave the highest VHN compared to mirofilled and microhybrid composites.…”

Section: Discussionmentioning

confidence: 99%

Post-irradiation vickers microhardness development of novel resin composites

Marghalani

2010

Mat. Res.

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The aim of this study was to evaluate the effect of post-irradiation dry aging at different periods of time on Vickers microhardness of some dental composites based on various resin matrices. Sixty four disc-shaped specimens of the resin composites were prepared in a split Teflon mold (8 × 2 mm) and irradiated by Optilux 501 light cure (500 mW.cm -2 for 40 seconds) on their top side. The specimens were aged-dry in dark at 23 and 37 °C for the following storage periods; immediate, 1/2 an hour, 1, 6, 12, 24, 48 and 168 hours. The microhardness values were recorded using a Vickers Hardness Tester at 300 g load for 15 seconds. Results showed that Filtek ® P90 and Definite expressed the highest hardness value followed by Tetric Evoceram and then Premise Enamel. At each aging period, all materials demonstrated significant differences between hardness values of top and base surfaces as well as both temperatures examined (P < 0.05). In conclusion, surface hardness developed gradually in most of the materials reaching optimum after 168 hours post-irradiation aging. Dental composites based on silorane and ormocer resin matrices achieved higher Vickers microhardness than those based on dimethacrylates resin.

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“…The UEDMA monomer has a high molecular weight but presents considerable flow. 23 On the other hand, Bis-EMA monomer is Bis-GMA derived with the hydroxyl groups removed. 24 Filtek P60's molecules form organic matrices that reduce polymerization shrinkage.…”

Section: Discussionmentioning

confidence: 99%

Six-year Clinical Evaluation of Packable Composite Restorations

Kiremitçi¹,

Alpaslan²,

Gürgan³

2009

Operative Dentistry

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A Kiremitci • T Alpaslan • S Gurgan Clinical RelevanceAs a posterior composite, Filtek P60 exhibited very good clinical performance in Class II cavities for six years. Methods: A total of 47 restorations were placed in the Class II cavity preparations (27 premolars and 20 molars) of 33 patients (22 female/11 male; mean age 34) by the same operator. The restorations were evaluated by two examiners at baseline and 1, 2, 3 and 6 years according to the method developed by Ryge, which also is known as the United States Public Health Service (USPHS) criteria. The following characteristics were observed: marginal adaptation, anatomical form, surface texture, marginal discoloration, surface staining, post-operative sensitivity and secondary caries. The Chi-square and Wilcoxon signed rank test with Bonferroni adjustment were used for statistical analysis (p=0.05).Results: All the restorations received Alpha scores at baseline assessment, except for one restoration, which showed post-operative sensitivity. At the three-year recall examination, two patients, with a total of three restorations, were not included. From baseline to three years, only two of the 44 restorations changed from Alpha to Conclusions: The clinical performance of the posterior composite restorations that were evaluated was acceptable after six years of service.

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Influence of UEDMA, BisGMA and TEGDMA on selected mechanical properties of experimental resin composites

Cited by 421 publications

References 20 publications

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

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

Post-irradiation vickers microhardness development of novel resin composites

Six-year Clinical Evaluation of Packable Composite Restorations

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