Effect of methacrylated chitosan incorporated in experimental composite and adhesive on mechanical properties and biofilm formation

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 ofStreptococcus 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 ofS.  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.

Source: European Journal of Oral Sciences - November 9, 2018 Category: Dentistry Authors: Ida S. R. Stenhagen, H åkon V. Rukke, Inger S. Dragland, Hilde M. Kopperud Tags: Original article Source Type: research