Surface morphologic evaluation of orthodontic bonding systems under conditions of cariogenic challenge.

摘要: Orthodontic bonding systems are submitted to demineralization and remineralization dynamics that might compromise their surface smoothness, favor biofilm aggregation caries development. The aim of the present study was evaluate effects a cariogenic challenge model (in vitro pH-cycling model) on roughness topography 3 materials: Transbond™ XT (XT), Plus Color Change (PLUS) Fuji Ortho™ LC (FUJI), by means Atomic Force Microscopy (AFM). Six specimens with standardized dimensions smoothness were fabricated per group, materials manipulated in accordance manufacturers' instructions. No polishing necessary. AFM tests performed before after pH-cycling, taking readouts specimen. results (Ra) obtained at nanometric levels (nm) records acquired two- three-dimensional images height lock-in phase material components. surfaces all groups analyzed morphologically altered, presenting suggestive matrix degradation loss matrix-load integrity. FUJI presented greatest increase roughness, followed PLUS, respectively (p≤0.001). Nevertheless, values found did not sufficient harbor bacteria. tested increased pH-cycling. use capable resisting oral environment is recommended, order conserve integrity surrounding tissues.