Marovic, Danijela and Tarle, Zrinka and Hiller, Karl-Anton and Mueller, Rainer and Rosentritt, Martin and Skrtic, Drago and Schmalz, Gottfried (2014) Reinforcement of experimental composite materials based on amorphous calcium phosphate with inert fillers. DENTAL MATERIALS, 30 (9). pp. 1052-1060. ISSN 0109-5641, 1879-0097
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Objectives. The aim of this study was to examine the influence of the addition of glass fillers with different sizes and degrees of silanization percentages to remineralizing composite materials based on amorphous calcium phosphate (ACP). Methods. Four different materials were tested in this study. Three ACP based materials: 0-ACP (40 wt% ACP, 60 wt% resin), Ba-ACP (40 wt% ACP, 50 wt% resin, 10 wt% barium-glass) and Sr-ACP (40 wt% ACP, 50 wt% resin, 10 wt% strontium-glass) were compared to the control material, resin modified glass ionomer (Fuji II LC capsule, GC, Japan). The fillers and composites were characterized using scanning electron microscopy. Flexural strength and modulus were determined using a three-point bending test. Calcium and phosphate ion release from ACP based composites was measured using inductively coupled plasma atomic emission spectroscopy. Results. The addition of barium-glass fillers (35.4(29.1-42.1) MPa) (median (25-75%)) had improved the flexural strength in comparison to the 0-ACP (24.8 (20.8-36.9) MPa) and glass ionomer control (33.1(29.7-36.2) MPa). The admixture of strontium-glass (20.3(19.5-22.2) MPa) did not have any effect on flexural strength, but significantly improved its flexural modulus (6.4(4.8-6.9) GPa) in comparison to 0-ACP (3.9(3.4-4.1) GPa) and Ba-ACP (4.6(4.2-6.9) GPa). Ion release kinetics was not affected by the addition of inert fillers to the ACP composites. Significance. Incorporation of barium-glass fillers to the composition of ACP composites contributed to the improvement of flexural strength and modulus, with no adverse influence on ion release profiles. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MECHANICAL-PROPERTIES; DENTAL COMPOSITES; POLYMERIC COMPOSITES; RESIN COMPOSITES; PARTICLE-SIZE; ION RELEASE; CONVERSION; STRENGTH; HYDROXYAPATITE; NANOPARTICLES; Amorphous calcium phosphate; Flexural strength; Flexural modulus; Ion release; Fillersa |
| Subjects: | 500 Science > 540 Chemistry & allied sciences 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie > Dr. rer. nat. Karl-Anton Hiller Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Rainer Müller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Aug 2019 11:32 |
| Last Modified: | 29 Aug 2019 11:32 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9681 |
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