Mechanical properties of composite material modified with amorphous calcium phosphate
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2016, Vol 74, Issue 1
Abstract
Purpose: The purpose of the study was to evaluate mechanical and physical propertiesof composite materials modified with amorphous calcium phosphate (ACP).Design/methodology/approach: The study used two flowable composite materials:an experimental composite material based on dimetacrylic resin filled with colloidalsilica (ECM) and commercially available composite material (SDR/Dentsply). Materialswere modified with the addition of ACP as a powder. Three testing groups were created,depending on the amount of ACP – 0.12 g, 0.24 g and 0.36 g – added to 2 g of the basiccomposite. The composite without ACP was the control group. Diametral Tensile Strength(DTS) was evaluated using Zwick-Roell Z020. Vickers hardness test (HV1/10) was performedusing the HV1/10 method in the ZHVμ (Zwick-Roell) hardness tester. The measurements ofshrinkage stress that arose during polymerisation of the tested materials were conductedwith the use of the FL200/Gunt circular polariscope.Findings: In both composites modified with ACP the decrease of DTS was observed. ACPaddition to experimental composite increased its hardness. Addition of 5.67 wt% of ACP toSDR resulted in significant decrease of its hardness. For both tested materials, the highestshrinkage stress was observed in composites modified with 5.67 wt% ACP addition. Thelowest shrinkage stress was observed in ECM modified with 15.25 wt% ACP and SDRcomposite containing 10.72 wt% ACP.Research limitations/implications: Additional investigations are needed to definethe exact influence of addition ACP to composite materials on their mechanical andphysiochemical properties.Originality/value: In order to improve biological behaviour of composite materials it ispossible to modify those materials with the addition of remineralising agents like ACP.
Authors and Affiliations
K. Drzewiecka, J. Kleczewska, M. Krasowski, B. Łapińska
Keywords
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