Study Regarding the Compressive Properties of Glass Fiber Reinforced Composites

Spânu, Paulina; Amza, Cătălin Gheorghe; Abaza, Bogdan Felician

doi:10.37358/mp.18.4.5078

Cited by 6 publications

(6 citation statements)

References 1 publication

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“…There are permanent, interdisciplinary concerns in the current scientific research, regarding the development and study of dental materials, and their biocompatibility, their interaction with the oral environment are topics of interest [29][30][31]. The scientific research carried out in this paper highlights, joining other confirmations in the literature, that the composite resins studied do not induce significant statistical changes (p > 0.05) of the levels of the studied parameters: (uric acid, GGT / gamma glutamyl transferase, OXSR-1/ oxidative stress responsive kinase 1) and of the levels of IL-6.…”

Section: Saliva Analysismentioning

confidence: 99%

Interactions Between Dental Composite Resins and Saliva A comparative biochemical in vitro study

Pantea¹,

Ighigeanu²,

Totan³

et al. 2019

Mat.Plast.

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This in vitro study analyses the biochemical interaction between saliva and three types of dental composite resins (a direct resin, an indirect resin and a dual-cure resin used for cementation of indirect dental restorations). The resin samples were obtained following a specific protocol and in line with the producers� recommendations; the resin samples were incubated with saliva samples collected from 19 healthy volunteers. The obtained results showed that the tested composite resins did not produce significant changes in oxidative stress parameters that were analysed (albumin, uric acid, GGT / gamma glutamyl transferase, OXSR-1 / oxidative stress responsive kinase 1) and do not influence the inflammatory salivary status reflected by the levels of IL-6 - an inflammatory marker.

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Section: Saliva Analysismentioning

confidence: 99%

Interactions Between Dental Composite Resins and Saliva A comparative biochemical in vitro study

Pantea¹,

Ighigeanu²,

Totan³

et al. 2019

Mat.Plast.

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“…Over the years, many studies were conducted regarding the properties of glass fibre reinforced polymeric composites and their usage [11,12], for example Spanu et.al. [13] conducted a study regarding the compressive properties of GFRP, they obtained many results for the same material as it was characterized by a high degree of inhomogeneity. Bunea et.al.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites

Condruz¹,

Vintila²,

Frigioescu³

et al. 2021

Mater. Plast.

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The present paper was focused on studying the influence of shelf life of an epoxy matrix on the mechanical properties of glass fibre reinforced composites. For the study, two types of the same epoxy system were used, one during its shelf life and one out of its shelf life. The reinforcement used consisted in E-glass fibre fabric. Mechanical investigations were realized in order to compare the materials in terms of loss of mechanical strength and elastic properties. Therefore, three mechanical tests were performed: tensile tests, in-plane shear and open-hole tensile tests. The results showed that the shelf life affects the mechanical properties of the polymeric composite. A decrease of 24% in tensile strength was recorded along with a 28% decrease of the in-plane shear strength and 55% of open-hole tensile strength for the composite manufactured with the out of shelf life epoxy system compared with the other composite. An overall reduction of mechanical strength and elastic properties of the composite material was observed, primarily due to polymeric matrix degradation, which after long periods it could be prone to brittleness and susceptible to delamination and fracture. The thermogravimetric analysis showed that thermal induced changes are happening at a higher speed in the out of shelf life composite, a lower mass loss being registered for new epoxy composite.

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“…They have the advantage of being less sensitive to moisture than resin-based materials. When moisture control is a problem, GICs may be a potential alternative for resin-based materials [17][18][19][20][21].…”

mentioning

confidence: 99%

Fluoride Release and Uptake Capability of Glass-ionomer Cements and Compomers Used as Dental Restorative Materials

Makkai¹,

Székely²,

Fazakas³

et al. 2019

Mat.Plast.

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Dental caries and secondary caries are the most common problems in dentistry. Many studies provided evidence for the anticariogenic effect of fluorides. The incidence of secondary caries is decreased in teeth restored with fluoride releasing materials. The purpose of the present in vitro study is to evaluate the fluoride release and uptake capability of two glass-ionomer cements and two compomers. A total number of 60 specimens were prepared according to the manufacturer�s instructions using silicone molds. The specimens were transferred in plastic containers containing artificial saliva (pH=7), incubated at 37�C for 24 h and divided in three subgroups: control group, varnish treated group and dentifrice treated group. The fluoride ion content was measured on five times during a period of 30 days using an Orion 720A fluoride meter with 9609 BN fluoride ion electrode. The self-curing glass-ionomer cement released the highest amounts of fluoride ions at the beginning and after the one month study period. The samples of the four materials tested in the varnish treated groups showed significant differences compared to their control groups on the second day. Dentifrice treated groups did not show significant differences compared to their control groups, except values measured after 30 days. Application of fluoride varnish produced an increase of fluoride release for the first 24 h in case of all materials. However, results suggest that the use of fluoridated dentifrice would be more effective in caries prevention due to their fluoride uptake capability.

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Study Regarding the Compressive Properties of Glass Fiber Reinforced Composites

Cited by 6 publications

References 1 publication

Interactions Between Dental Composite Resins and Saliva A comparative biochemical in vitro study

Interactions Between Dental Composite Resins and Saliva A comparative biochemical in vitro study

Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites

Fluoride Release and Uptake Capability of Glass-ionomer Cements and Compomers Used as Dental Restorative Materials

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