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A Polysaccharide-Based Antibacterial Coating with Improved Durability for Clear Overlay Appliances
journal contribution
posted on 2018-05-04, 00:00 authored by Sohyeon Park, Hyun-hye Kim, Seok Bin Yang, Ji-Hoi Moon, Hyo-Won Ahn, Jinkee HongClear overlay appliances
(COAs) are widely used in orthodontic fields because they offer many
advantages, such as cost-effectiveness, good formability, and good
optical characteristics. However, it is necessary to frequently replace
COAs because the thermoplastic polymers that are used to fabricate
COAs have poor abrasion resistance and have a tendency to induce bacterial
accumulation. Here, we have developed polysaccharide-based antibacterial
multilayer films with enhanced durability, intended for COA applications.
First, multilayer films composed of carboxymethylcellulose (CMC) and
chitosan (CHI) were fabricated on polyethylene terephthalate glycol-modified
(PETG), which was preferred material for COA fabrication, via a layer-by-layer
(LbL) technique. Next, chemical cross-linking was introduced within
the LbL-assembled multilayer films. The LbL-assembled CMC/CHI film,
which was made porous and rough by the cross-linking, formed a superhydrophilic
surface to prevent the adhesion of bacteria and exhibited a bacterial
reduction ratio of ∼75%. Furthermore, the cross-linking of
the multilayer film coated on the PETG also improved the chemical
resistance and mechanical stability of the PETG under simulated intraoral
conditions with artificial saliva, by increasing the bond strength
between the polysaccharide chains. We attempted to accumulate datasets
using our experimental design and to develop sophisticated methods
to assess nanoscale changes through large-scale measurements.
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filmCMCLbL-assembledPETGCOA fabricationpolysaccharide chainsPolysaccharide-Based Antibacterial Coatingabrasion resistancechemical cross-linkingClear Overlay Appliances Clear overlay applianceschemical resistancenanoscale changesbond strengthCHICOA applicationsreduction ratiointraoral conditionspolyethylene terephthalate glycol-modifiedsuperhydrophilic surface
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