Mejorando la fuerza adhesiva de los brackets ortodóncicos

Resum

The aims of this study were: to determine the effect of two adhesion promoters, Enhance-L.C. (Reliance, ltasca, Ill.) and OrthoSolo (Ormco, Sybron Dental Specialities, Tokyo, Japan) on the shear bond strength, and the ammount of adhesive remnant on teeth after debonding brackets (Victory Series, 3M Unitek Dental Products, Monrovia, Calif.); and to find out if Enhance-L.C. is material specific as suggested by the manufacturer or if it has similar effects when used with other orthodontic adhesive systems which do not belong to the same product range. Were divided into five groups of 25, 125 upper premolars: I, Transbond-XT (3M Unitek Dental Products, Monrovia, Calif.); II, Transbond-XT/Enhance-L.C; III, Transbond-XT/OrthoSolo; IV, Light-Bond (Reliance, Itasca, III.); and V, Light-Bond/Enhance-L.C. Shear bond strength was tested using a universal test machine and adhesive remnant was quantified using an image analysis equipment. OrthoSolo significantly improved bonding for Transbond-XT adhesive system. Enhance L.C. did not significantly increase bond strength for either Transbond-XT or Light-Bond (the system recommended by the manufacturer). However the combination LightBond/ Enhance-LC provided a significantly greater bond strength than Transbond-XT and Transbond-XT/ Enhance-L.C. (P<.005). No significant differences between the bond strength for Light-Bond/Enhance L.C. and Transbond-XT/OrthoSolo were detected (P>.005). As for adhesive remnant, no significant increase (P>.05) was observed with the application of the promoters. The use of OrthoSolo is recommended in those cases requiring increased bond strength for Transbond-XT. With Light-Bond system, it is preferible to use Enhance-L.C. when increased bond strengthis needed.