| 초록 |
Clear overlay appliances (COAs) are widely used in orthodontic fields because they have many advantages, such as cost-effectiveness, good formability, and good optical characteristics. However, it is necessary to frequently replace COAs because thermoplastic polymers used as COA material have poor abrasion resistance and tend to induce bacterial accumulation. Here, we developed polysaccharide-based antibacterial nanofilm with enhanced durability, intended for COA applications. First, multilayer film composed of carboxymethyl cellulose and chitosan was prepared via layer-by-layer (LbL) assembly, and then the crosslinking technique was applied to LbL assembled films in order to induce the structural changes. The prepared film with increased porosity and roughness by crosslinking formed a super-hydrophilic surface to prevent the adhesion of bacteria. Also, the coating on the PETG improved the stability of the PETG by increasing the bond strength between the polysaccharide chains. |
