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01.04.2014 | Original Article

Effect of silanized nanosilica addition on remineralizing and mechanical properties of experimental composite materials with amorphous calcium phosphate

verfasst von: Danijela Marovic, Zrinka Tarle, Karl Anton Hiller, Rainer Müller, Mira Ristic, Martin Rosentritt, Drago Skrtic, Gottfried Schmalz

Erschienen in: Clinical Oral Investigations | Ausgabe 3/2014

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Abstract

Objectives

Experimental composite resins with amorphous calcium phosphate (ACP) have the potential to regenerate demineralized tooth structures. The aim of the study was to investigate the effect of the addition of silanized silica nanofillers to the ACP-based composites on their mechanical properties and the kinetics of calcium and phosphate release.

Materials and methods

The test materials comprised 5 wt% (5-ACP) or 10 wt% (10-ACP) of silanized silica admixed to the 40 wt% ACP and 50 or 55 wt% resin. The ACP control (0-ACP) contained 40 wt% ACP and 60 wt% resin. Additionally, composite material CeramX (Dentsply, Germany) was included as control. Three-point bending test was performed to calculate flexural strength and modulus of elasticity. Inductively coupled plasma atomic emission spectroscopy was used for measurement of ion release. The micromorphology of calcium phosphate depositions on composite samples has been qualitatively evaluated using a scanning electron microscope. The results were analyzed using Mann–Whitney and Wilcoxon rank sum tests (α < 0.05).

Results

Ion release was enhanced by the silica fillers, when compared to the 0-ACP. Although not statistically significant, flexural strength of 10-ACP was improved by 46 % compared to 0-ACP. Flexural modulus of 5-ACP was significantly higher than 0-ACP.

Conclusions

The admixture of silanized fillers seems to be a promising approach for the improvement of mechanical and remineralizing properties of ACP composite resins.

Clinical relevance

ACP-based composite resins with modified composition could serve as an effective remineralizing aid as base materials in restorative dental medicine.

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Titel: Effect of silanized nanosilica addition on remineralizing and mechanical properties of experimental composite materials with amorphous calcium phosphate
verfasst von: Danijela Marovic
Zrinka Tarle
Karl Anton Hiller
Rainer Müller
Mira Ristic
Martin Rosentritt
Drago Skrtic
Gottfried Schmalz
Publikationsdatum: 01.04.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 3/2014
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-013-1044-x

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Effect of silanized nanosilica addition on remineralizing and mechanical properties of experimental composite materials with amorphous calcium phosphate