17 April 1995 Effects of different black mediators on the shear strength of orthodontic bracket to the enamel treated with Nd-Yag laser
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Proceedings Volume 1984, Advanced Laser Dentistry; (1995) https://doi.org/10.1117/12.207018
Event: Advanced Laser Dentistry, 1994, St. Petersburg, Russian Federation
Abstract
The Nd:YAG laser has ablation, crack, and crater effects on the dental enamel through black mediators which are very similar to the acid etching effects of phosphoric acid. This study was designed for searching how the different black mediators influence the shear strengths of the brackets bound to the enamel surfaces which were treated with the Nd:YAG laser. 90 bovine enamels divided into 5 groups were painted with 5 kinds of black mediators including Chinese ink, oil ink, black ball pen, water ink and black transfer paper. The enamel surfaces painted with black mediators were then radiated by Nd:YAG laser (ADL; American Dental Laser 300dl, power: 20 pps, 87.5 mj). Orthodontic brackets were bonded to the radiated surfaces. Then the shear strengths of the brackets to the enamels were measured by Instron. The results showed that the Chinese ink group and oil ink group has the strongest shear strength, ball pen group and water ink group showed the second strength, and the transfer paper group has the lowest shear strength. In addition, scanning electronic microscope also was used to observe the topographic changes of the enamel surfaces induced by the laser ablation.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shun-Te Huang, Shun-Te Huang, I-Shueng Lin, I-Shueng Lin, Chi-Cheng Tsai, Chi-Cheng Tsai, } "Effects of different black mediators on the shear strength of orthodontic bracket to the enamel treated with Nd-Yag laser", Proc. SPIE 1984, Advanced Laser Dentistry, (17 April 1995); doi: 10.1117/12.207018; https://doi.org/10.1117/12.207018
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