RESUMEN
The aim of this study was directed to evaluate the effect of fluoridated orthodontic adhesive on the shear bond strength in comparison to non-fluoridated no-mix adhesive. Three different orthodontic adhesives [no-mix non-fluoridated, glass ionomer and fluoridated no-mix] were used in this study. The samples consisted of 60 freshly extracted premolar teeth divided into three groups according to type of adhesive used. The shear bond strength was measured for each group. From the results of this study it could be conclude that the low shear bond strength of fluoridated composite resin may be related to the high amount of fluoride ion exchange which weaken the resin. The light cure glass ionomer orthodontic adhesive has reasonable shear bond strength to be used as orthodontic adhesive