Influence of the Nanoparticles Chitosan High Molecular on the Degradation of Nanofill and Nanohybrid Composite Resins inVarious pH Saliva

Composite resin is a filling or restoration material that has a similar color to the teeth, is insensitive to dehydration, and is relatively easy to manipulate. One of the nanotechnology developments in dentistry is nano fill and nanohybrid composite resin with minute particle sizes, which has a different value in its physical, mechanical, and optical properties. In the oral cavity, composite resin restoration material comes in contact with various salivary pH, acidic or alkali that can affect physical property changes, including surface roughness. Chitosan is a biomaterial continuously being developed because it has many medical benefits and has proven safe to use on people. This study analyzes composite resin restoration strength when nanoparticle chitosan high molecular is added 1% to its surface degradation. Samples are 36 human premolar teeth randomly classified into 12 groups (r=3). Each group is classified based on different filling materials and salivary pH. Scanning Electron Microscopy (SEM) samples are tested to see the surface degradation. The result of this study shows that using composite resin, either nanofiller or nanohybrid, will go through salivary degradation on pH 3, 5, 7, dan 10. The lower the pH, the higher the degradation, Adding 0,1% chitosan on nano fill and nano hybrid shows that there is still degradation in the restoration surface. 0,1% Chitosan added in nano hybrid composite resin on pH 7 offers surface stability, although degradation is still found. The 0,1% chitosan added into nano fill composite resin shows a different value although still lower than nano hybrid composite added with 0,1% chitosan on surface degradation. Adding 0,1% high molecular Chitosan to both nanocomposite resins shows a better value when compared to the composite resin that is not infused with Chitosan