Research Article
Harini T, Sreedhar Reddy
Abstract
This Study was undertaken to study if adhesion boosters could improve bond strengths of new and recycled orthodontic brackets. Materials and Methods: The sample consisted of one hundred freshly extracted non carious human premolars extracted for orthodontic purpose were divided into four Groups Group-I: New Brackets bonded with no mix adhesive. Group-II: New brackets bonded with no mix adhesive and all bond-2 (an adhesion booster). Group-III: Recycled brackets with no mix adhesive. Group-IV: Recycled brackets with no mix adhesive and all bond-2. Shear bond strength was tested using a Universal Testing Machine (Instron Corp, Figure-4) Results:The mean bond strength of different groups are Group I-10.4470Mpa, Group II- 14.2465Mpa, Group III- 6.5395Mpa, Group IV-10.2220Mpa. Discussion:There was a significant increase in bond strengths in the groups bonded with all bond-2 compared to groups without all bond-2. The mean bond strength of recycled brackets without all Bond-2 (6.5395 MPa) was significantly lower than the mean bond strength of recycled brackets with all bond-2 (10.22 MPa at P<0.05 level P=0.49635). Conclusion: In order to increase bond strength of recycled brackets, all bond-2 can be used. As the bond strength of recycled brackets with All bond-2 is close to that of new brackets without adhesion boosters, bonding all bond-2 on recycled brackets is as good as bonding new brackets.