Danijela Marovic1, Zrinka Tarle2, Karl-Anton Hiller3, Rainer Müller4, Martin Rosentritt5, Drago Skrtic6, Gottfried Schmalz3. 1. Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia. Electronic address: marovic@sfzg.hr. 2. Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia. 3. Department of Operative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, Germany. 4. Institute of Physical and Theoretical Chemistry, University of Regensburg, Germany. 5. Department of Prosthodontics, University Hospital Regensburg, University of Regensburg, Germany. 6. Dr. Anthony Volpe Research Center, ADA Foundation, Gaithersburg, MD, USA.
Abstract
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.
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.
Authors: Ranulfo Gianordoli-Neto; Gislaine Cristina Padovani; José Mondelli; Maria Fidela de Lima Navarro; Juliano Sartori Mendonça; Sérgio Lima Santiago Journal: J Conserv Dent Date: 2016 Jul-Aug
Authors: Kanokrat Kangwankai; Sarah Sani; Piyaphong Panpisut; Wendy Xia; Paul Ashley; Haralampos Petridis; Anne Margaret Young Journal: PLoS One Date: 2017-11-14 Impact factor: 3.240