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Characterization of Chitosan/TiO 2 Nano‐Powder Modified Glass‐Ionomer Cement for Restorative Dental Applications
Author(s) -
Ibrahim Marrwa A.,
Meera Priyadarshini Balasankar,
Neo Jennifer,
Fawzy Amr S.
Publication year - 2017
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12282
Subject(s) - glass ionomer cement , materials science , chitosan , flexural strength , composite material , surface modification , compressive strength , cement , hardness , nuclear chemistry , chemical engineering , chemistry , engineering
Objectives We are introducing novel glass‐ionomer cement (GIC) dually‐modified with chitosan (CH) in the liquid phase and titanium‐dioxide nano‐powder (TiO 2 /NP) in the powder phase. The aim was to investigate the effect of this dual‐modification on the antibacterial properties against S. mutans biofilms and on the bulk and surface mechanical properties. Methods Commercially available powder/liquid restorative GIC was used in this study. The GIC specimens were modified with 3% ( w/w ) TiO 2 /NP, 10% ( v/v ) CH solution, or dually‐modified with TiO 2 /CH. The non‐modified GIC was used as a control. The biofilms formations were characterized by SEM, live/dead assay using confocal‐microscopy, colony‐forming unit counts, and MTS assay. The bulk and surface mechanical properties were characterized in terms of flexural and compressive strengths and surface hardness, respectively. Results With the dual‐modification, a significant improvement in the antibacterial properties was found both qualitatively and quantitatively. The synergetic effect of the dual‐modification was also reflected on the enhancement of the flexural and compressive strengths. However, no difference was found in surface hardness. Conclusions The modification of GIC powder with TiO 2 /NP showed to be more effective in enhancing the mechanical properties. However, the enhancement in the antibacterial properties was more evident with CH incorporation in GIC liquid. Clinical Significance This study introduced novel glass ionomer cement dually‐modified with TiO2 NP and chitosan with superior mechanical and antibacterial properties for potential applications in restorative and preventive dentistry. The modification of GIC powder with TiO2 NP showed to be more effective in enhancing the mechanical properties. However, the enhancement in the antibacterial properties was more evident with CH incorporation in GIC liquid. Although of the promising synergetic effect of the dual‐modification of GIC with TiO2 NP/CH, further clinically‐related studies are recommended. (J Esthet Restor Dent 29:146–156, 2017)