A new multipurpose dental adhesive for orthodontic use: An in vitro bond-strength study

The purpose of this study was to evaluate the compatibility of a new dental adhesive, High-Q-Bond (HQB) adhesive, for the bonding of orthodontic brack ets by determining its bond strength and the mode of bond failure after deb onding. Eighty extracted human premolars were divided into 4 groups, 20 in each group. In groups 1 and 2, stainless steel brackets were bonded to etch ed enamel with HQB and Right-On adhesives respectively. In groups 3 and 4, the same adhesives were used to bond stainless-steel brackets to roughened, old amalgam restorations prepared in the teeth. After 72 hours of incubati on in saline solution at 37 degrees C, debonding was performed with a shear ing force. The force at bond failure was recorded, and the mode of bond fai lure was examined. Results showed that when bonding to enamel, both the HQB and the Right-On material achieved adequate bond strength, and no signific ant difference was found between the two. However, after debonding, the HQB material left no adhesive on the enamel, whereas the Right-On material lef t significant amounts of adhesive on the enamel. When bonding to amalgam, t he HQB material had a significantly higher shear bond strength than did the Right-On adhesive. It is suggested that HQB can be applied for orthodontic use, but further clinical studies are required to evaluate its efficacy.