Fig. 3

Proportional dye penetration (PDP) for adhesive–enamel (Ad) and adhesive–bracket interface (Br) of five adhesive materials (resin-based composite materials: GC – GC OrthoConnect, LB – Light Bond, TB – Transbond XT, TL – TrulockTM Light and resin-reinforced glass ionomer cement: GCO – GC Fuji Ortho LC) as predicted by a generalized linear mixed model containing the adhesive materials, position of measurement and the interaction between adhesive and position as predictors. The shaded areas indicate 95% confidence intervals