DEBONDING OF CERAMIC BRACKETS BY ER:YAG LASER

Authors : Şeyda ERŞAHAN, Fidan ALAKUŞ SABUNCUOĞLU, Ergül ERTÜRK

Pages : 24-30

Doi:10.17096/jiufd.39114

View : 21 | Download : 9

Publication Date : 2016-04-01

Article Type : Research Paper

Abstract :Purpose: The objective of the present study is to evaluate the effects of Er:YAG laser debonding of ceramic brackets on the bond strength and the amount of adhesive resin remnant. Materials and Methods: Twenty human mandibular incisors were randomly divided into two groups of 10 and polycrystalline ceramic brackets insert ignore into journalissuearticles values(Transcend series 6000, 3M Unitek, Monrovia, CA, USA); were bonded on enamel surfaces. Group 1 was the control group in which no laser application was performed prior to the shear bond strength insert ignore into journalissuearticles values(SBS); testing. In Group 2, Er:YAG was applied in 3W power for 6 seconds using the scanning method. The brackets were tested for SBS with an Instron universal testing machine and results were expressed in megapascals insert ignore into journalissuearticles values(MPa);. The amount of adhesive remnant was evaluated with Adhesive Remnant Index insert ignore into journalissuearticles values(ARI);. One-way analysis of variance and Tukey’s post-hoc tests were used for statistical analysis. Results: Mean ± standard deviation of SBS values in the control group was 13.42 ±1.23 MPa and 8.47 ±0.71 MPa in the Er:YAG group and this difference was statistically significant insert ignore into journalissuearticles values(p<0.05);. The evaluation of ARI scores demonstrated more adhesive was left on the enamel surface with Er:YAG group. Conclusion: 3W power Er:YAG laser application with the scanning method to polycrystalline ceramic brackets demonstrated lower bond strengths and higher ARI scores during the debonding procedure.
Keywords : Orthodontic bracket, Laser, Shear strength, Bracket debonding