Abstract
The purpose of this study was to investigate the effects of Nd:YAG laser, air abrasion and acid-etching on the porcelain surface and repairment. Ten standard cylindrical specimens were made for each preparation (Finesse™ Dentsply). The specimens were lased for five seconds at a fluence of 80 mJ and a frequency of 20 Hz; air abraded for five seconds with 50 micron Al-oxide (at 60 psi); and acid etched with % 9,6 hydrofluoric acid for 120 seconds. The specimens were examined in the scanning electron microscopy (SEM) before and after the Nd:YAG laser, air abrasive and acid-etching. After silane coupling agent was applicated, two flowable restorative materials (Admira Flow™, Voco; Tetric Flow™, Vivadent) were bonded to the porcelain surfaces. Each group was stored in distilled water at 37°C for one day before the determination of shear bond strengths. A shear bond strength machine with 50 kg load cell and a 0.5 mm/min crosshead speed was used. The results were analyzed statistically. There was a significance between the shear bond strenth values of Admira Flow™ and Tetric Flow™ in the lased group (p<0.05).
| Original language | English |
|---|---|
| Pages (from-to) | 2039-2042 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 264-268 |
| Issue number | III |
| Publication status | Published - 2004 |
| Event | Proceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey Duration: 29 Jun 2003 → 3 Jul 2003 |
Funding
The manufacturer’s directions for this repair system are presented in Table I. These directions and variations of the directions were incorporated in this study to evaluate the Fig. 1. Porcelain specimen supported by metal ingot. Porcelain was fired into preparation in metal and ground flat.
Keywords
- Nd : YAG laser
- Porcelain
- Shear bond strength