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Effect of methacrylated chitosan incorporated in experimental composite and adhesive on mechanical properties and biofilm formation
Author(s) -
Stenhagen Ida S. R.,
Rukke Håkon V.,
Dragland Inger S.,
Kopperud Hilde M.
Publication year - 2019
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/eos.12584
Subject(s) - chitosan , adhesive , biofilm , composite number , flexural strength , streptococcus mutans , composite material , bond strength , materials science , polymer , dental composite , chemistry , organic chemistry , layer (electronics) , biology , bacteria , genetics
The lifespan of a resin‐based restoration is limited, with the main reason for failure being secondary caries. Biofilm formation at the tooth–material interface is a necessary etiological agent for caries development. Dental materials with antimicrobial properties may reduce formation of biofilm and thus increase the longevity of restorations. This study aimed to investigate the effect of methacrylated chitosan ( CH ‐ MA ), incorporated into the polymeric network of an experimental dental composite and adhesive, on biofilm growth of Streptococcus mutans and to assess the mechanical properties of the modified materials. The methacrylation of low‐molecular‐weight chitosan was achieved and biofilm studies confirmed the antibacterial effect of the modified polymer in solution. Methacrylated chitosan was incorporated into an experimental composite and adhesive, and the modified materials reduced the formation of S. mutans biofilm. The incorporation of CH ‐ MA did not alter the bond strength of the adhesives. However, the amount of CH ‐ MA in composite that is required to elicit an antibacterial response challenges the mechanical properties of the material. The hardness and flexural strength of the composite decreased with increasing amounts of CH ‐ MA . However, flexural strength values still met the requirement in the ISO standard.