Molecular Interactions between Saliva and Dental Composites Resins: A Way Forward

Dentin and enamel loss related to trauma or especially caries is one of the most common pathological issues in dentistry that requires restoration of the teeth by using materials with appropriate properties. The composite resins represent dental materials with significant importance in today’s dentistry, presenting important qualities, including their mechanical behavior and excellent aesthetics. This paper focuses on the saliva interactions with these materials and on their biocompatibility, which is continuously improved in the new generations of resin-based composites. Starting from the elements involved on the molecular landscape of the dental caries process, the paper presents certain strategies for obtaining more advanced new dental composite resins, as follows: suppression of oral biofilm acids formation, promotion of remineralization process, counteraction of the proteolytic attack, and avoidance of cytotoxic effects; the relation between dental composite resins and salivary oxidative stress biomarkers is also presented in this context.

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Evaluation of Light Curing Distance and Mylar Strips Color on Surface Hardness of Two Different Dental Composite Resins

The Open Dentistry Journal ◽

10.2174/1874210601408010144 ◽

2014 ◽

Vol 8 (1) ◽

pp. 144-147 ◽

Cited By ~ 3

Author(s):

Seyed Mostafa Mousavinasab ◽

Mehrdad Barekatain ◽

Elahe Sadeghi ◽

Farzaneh Nourbakhshian ◽

Amin Davoudi

Keyword(s):

Dental Materials ◽

Surface Hardness ◽

Hardness Test ◽

Composite Resins ◽

Dental Composite ◽

Test Machine ◽

Dental Composite Resins ◽

Light Curing ◽

Spss Software ◽

Temperature Surface

Introduction:Hardness is one of the basic properties of dental materials, specially composite resins which is relevant to their polymerization. The aim of this study was to evaluate the effect of light curing distance and the color of clear Mylar strips on surface hardness of Silorane-based (SCR) and Methacrylate-based composite resins (MCR).Materials and methods:40 samples of MCRs (Filtek Z250) and SCRs (Filtek P90) were prepared in size of 5 mm×2 mm (80 samples in total). The samples divided into 8 groups (10 samples in each one) based on the color of clear Mylar strips (white or blue) and distance from light curing source (0 mm or 2 mm). All the samples cured for 40 second and stored in incubator for 24 hours in 37°C temperature. Surface hardness test was done by Vickers test machine and the collected data were analyzed by one-way ANOVA and paired T-test by using SPSS software version 13 at significant level of 0.05.Results:MCRs cured with blue Mylar strips from 0 mm distance had the highest (114.5 kg/mm2) and SCRs cured with white Mylar strips from 2 mm distance had the lowest (42.2 kg/mm2) mean of surface hardness. Also, the results of comparison among SCRs and MCRs showed significant differences among all groups (all P values <0.01).Conclusion:The hardness decreased as the distance increased and the blue Mylar strips provided higher hardness than clear ones. Also, Filtek Z250 showed higher hardness compared to Filtek P90.

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Indentation Fracture Toughness Testing of and Crack Propagation Mode in Dental Composites

MRS Proceedings ◽

10.1557/proc-110-619 ◽

1987 ◽

Vol 110 ◽

Cited By ~ 10

Author(s):

Jack L. Ferracane

Keyword(s):

Fracture Toughness ◽

Crack Propagation ◽

Composite Resins ◽

Dental Composite ◽

Dental Composites ◽

Propagation Mode ◽

Dental Composite Resins ◽

Indentation Fracture Toughness ◽

The Matrix ◽

Toughness Testing

AbstractThe use of a Vicker's indenter to measure the fracture resistance of dental composite resins was correlated to fracture toughness results obtained by bending of notched bars. There is a fair correlation between the methods, but many dental composites do not form cracks by the indentation technique, thereby limiting its usefulness. SEM micrographs reveal a crack propagation mode which is mostly through the matrix and along the filler/matrix interface, with evidence of particle fracture

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

Materiale Plastice ◽

10.37358/mp.19.3.5223 ◽

2019 ◽

Vol 56 (3) ◽

pp. 529-533

Author(s):

Mihaela Pantea ◽

Diana Andreea Ighigeanu ◽

Alexandra Totan ◽

Maria Greabu ◽

Daniela Miricescu ◽

...

Keyword(s):

Oxidative Stress ◽

In Vitro Study ◽

Composite Resins ◽

Vitro Study ◽

Dental Composite ◽

Gamma Glutamyl Transferase ◽

Specific Protocol ◽

Dental Composite Resins ◽

Glutamyl Transferase

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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