Effect of titanium dioxide nanotubes on the mechanical and antibacterial properties of the low-viscosity bulk-fill composite


Ozlen R. H. E. , DALKILIÇ E., KÜÇÜKYILDIRIM B. O. , AKDOĞAN EKER A. , Topcuoglu N., Kulekci G.

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1080/01694243.2021.1982282
  • Title of Journal : JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
  • Keywords: TiO2-n, nanotube, bulk-fill composite resin, three-point bending, microhardness, surface roughness, POLYMERIZATION SHRINKAGE, DENTAL COMPOSITE, CURE, RESTORATIONS, FAILURE, REASONS, DEPTH, TEETH

Abstract

The purpose of this investigation is to determine the impact of titanium dioxide nanotubes (TiO2-n) on the mechanical and antibacterial properties of bulk-fill composite resin. TiO2-n were synthesized in laboratory conditions using the hydrothermal method. Varying amounts of TiO2-n were included in the bulk-fill composite resin. Microhardness, surface roughness, and the three-point bending test were used to determine the mechanical properties of the composite. After the flexural strength test, the fractured surfaces of the composite resin were examined with a high-resolution scanning electron microscope. The antibacterial activity of Streptococcus mutans (S.mutans) and Lactobacillus Casei (L.casei) was assessed using a direct contact test. The statistical examination was completed using IBM SPSS Statistics 22. Group differences were compared using the Kruskal Wallis and Dunn tests (p < 0.05). The addition of TiO2-n did not change the roughness of the bulk-fill composites (p > 0.05). Adding 0.5% and 1% TiO2-n increased the microhardness of the bulk-fill composite (p < 0.05). Adding TiO2-n did not change the three-point bending results of the bulk-fill composite (p > 0.05). Though adding TiO2-n did not have an antibacterial impact on S.mutans (p > 0.05), adding 0.5% TiO2-n produced an antibacterial impact on L.casei in daylight (p < 0.05). The addition of 0.5% and 1% TiO2-n increased the microhardness of the top surface of the bulk-fill composite without negatively affecting surface roughness or the composite's three-point bending properties Adding 0.5% TiO2-n to the composite resin produced an antibacterial impact on L.casei in daylight.