Abstract
Composite resins are the material election to restored minimal invasive cavities; conversely, it is important to explore their mechanical properties of commercial available dental materials. Objective: To compare the Vickers microhardness (VHN) of four available commercial composite resins of standardized samples and methods. Methodology: Composite cylinders were performed in a Teflon mould. We use the follow composite resins (n=4/gp): Microhybrid resins [Feeling Lux (Viarden) and Amelogen Plus (Ultradent)], Hybrid resin [Te-Econom Plus (Ivoclar)] and Nanohybrid resin [Filtek Z350 (3M ESPE)]. All samples were incubated in distilled water at 37 oC for five days. The test was carried out with microhardness indenter at 10 N, and a dwelling time of 10 s for 9 indentations across the specimens resulting in a total of 36 indentations for each group. Data were subject to Kolmogorov-Smirnov normality test and ANOVA (post-hoc) Tukey test. Results: The VHN mean values corresponded from harder to softer as follow: Filtek Z350 (71.96±6.44) (p˂0.01)˃Amelogen Plus (59.90±4.40) (p˂0.05)˃Feeling lux (53.52±5.72)˃Te-Econom Plus (53.26±5.19). Conclusion: According to our results, the microhardness of the evaluated conventional composite resin can withstand the masticatory forces but nanohybrid composite resins showed better Vickers microhardness that clinically can results in suitable option for restored minimal invasion treatments.
Highlights
The recent technological trends have changed the view of dentistry in the 21th century since the Black postulates
Composite resins are the material of choice to restore minimal invasive cavities; it is important to explore the mechanical properties of commercially available dental materials
Filtek Z350 resulted in higher (p
Summary
The recent technological trends have changed the view of dentistry in the 21th century since the Black postulates. Minimal invasive dentistry is a new paradigm that is supported by evidence-based dentistry. Approaches of oral health care require the judicious integration of clinically relevant evidence, the patient’s dental and medical condition and records, with the dentist’s clinical expertise and the patient’s treatment needs and preferences using minimal interventions[1,2]. Composite resins are one of the most suitable dental materials to make minimal invasive treatments due to their aesthetics, easy handling, biocompatibility and adhesive properties; easy discoloration during their long term in the oral cavity and poor marginal sealing are the main disadvantages of their use and directly related to their composition and mechanical properties such as microhardness[3,4].
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