Enamel Integrity: Base  Morphology And Clarity Of Debonded  Plastic Brackets

Method: Images were taken in Scan electron microscopy  (SEM) from retentive base of plastic brackets (Brillant, Elegance SL, Spirit MB, Silkon plus, Avalon, Orthoflex, Fiber glass-reinforced) at  three magnification 25x,50,100x. The degree of light transmission was an assessment and  precuring  of photoinitiation was examined. After that, The shear bonding strength and mode of failure  were evaluated during debonding with standardization other factors

Result: SEM  exhibited  differences  in surfaces morphology of retentive base between tested plastic bracket. Optical Characteristic showed Brillant and OrthoFlex brackets are significant difference with all tested bracket but not significant between them .One-way ANOVA revealed significant difference at (p < 0.05) in shear bond strength .The Elegance SL and Avalon gave highest bond strength while the Spirit MB gave the lowest value

Conclusion:

The morphology of Base and  clarity of plastic brackets have a direct effect on the adhesion brackets with enamel surface under the same condition  in addition the mode of retention play a important role on the damage of enamel surface after debonding .