Shear Bond Strength of Composite Resin Bonded to Enamel Etched with Er; Cr : YSGG Laser: A Comparative in vitro Study | ||
| Medical Journal of Babylon | ||
| Article 1, Volume 13, Issue 3, September 2016, Pages 0-0 | ||
| Author | ||
| Qasim Abdulkareem Mohammad | ||
| Abstract | ||
| Eighty sound bovine incisors have been selected for this study, and divided into eight groups (N=10). The labial enamel of group 1 was conventionally etched by 37% phosphoric acid, group 2 roughened with diamond bur then acid etched, group 3, 5, and 7 etched by Er;Cr:YSG Glaser with a power of 1W, 2W and 3W respectively, groups 4, 6 and 8 same as groups 3, 5 and 7 but followed by acid etching. After that self-etching bonding agent applied and cured then a composite core made and loaded till failure. One-way AVOVA test showed significant differences between groups (p<0.05). Duncan multiple range post-hoc test showed that the SBS mean value for group 3 was (5.8±1.2 MPa), and the group 4 (9.7±1.6) which was significantly higher than group 3, but both of them were significantly lower than other groups. There were no significant differences among group 5 (15.6±1.2), group 7 (16±1.1) and group 1 (17.1±2.6). No significant differences were found among group 2 (21.2±1.9), group 6 (21.3±2.2) and group 8 (22.6±1.5), and these three groups were significantly more retentive than all other groups in this study. Conclusions: 1W laser etching produced the least SBS. 2W and 3W laser etching can substitute acid etching, but they give better results as good as bur roughened+acid etching if they followed by acid etching. | ||
| Keywords | ||
| Laser etching; Shear bond strength; YSGG | ||
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