Shear bond strength of orthodontic brackets bond with conventional light emitting diode and fast halogen light

Aim: to compare the mean shear bond strength (msbs) of metal brackets bonded with conventional led or fast halogen units. methods: this in-vitro comparative study was conducted on 50 extracted human premolars which were randomly divided into 2 groups of 25 teeth each,by lottery method. following a standard bonding protocol,group 1,teeth brackets were cured with conventional led light source and in group 2,by fast halogen light. msbs was measured using universal testing machine,at a crosshead speed of 1 mm/minute and recorded in megapascals (mpa). independent t-test was used for comparison of msbs in both the groups. the level of significance was determined at p ≤0.05. duration of this study was january 2017 to october 2017. results: msbs of metal brackets cured with fast halogen (17.60±3.7 mpa) was similar to conventional led unit (16.66±3.0 mpa). conclusion: fast halogens are equally effective for curing brackets,as they give similar bond strength when compared with conventional led lights.