DEBONDING OF CERAMIC BRACKETS BY ER:YAG LASER
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 polycrysta...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Istanbul University
2016-04-01
|
| Series: | Journal of Istanbul University Faculty of Dentistry |
| Subjects: | |
| Online Access: | http://www.journals.istanbul.edu.tr/iudis/article/view/5000153187/5000162488 |
| Summary: | 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 (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 (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 (MPa). The amount of adhesive
remnant was evaluated with Adhesive Remnant Index
(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 (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. |
|---|---|
| ISSN: | 2149-2352 2149-4592 |