Title: Bonding effectiveness of a total-etch and self-etch adhesive to Er:YAG lased enamel and dentin
Authors: De Munck, Jan
Van Meerbeek, Bart
Yudhira, Rafael
Lambrechts, Paul
Vanherle, Guido #
Issue Date: Mar-2002
Conference: IADR/AADR/CADR location:San Diego date:6-9 march 2002
Article number: 3279
Abstract: Recently, the use of laser technology as an alternative to mechanical rotating instruments for cavity preparation has been introduced. Objectives: The hypothesis tested was that laser irradiation is equally effective to pre-treat enamel and dentin as acid-etch procedures. Methods: Buccal/oral enamel and mid-coronal human dentin was laser-irradiated using an Er:YAG laser (λ=2.94 µm; Fidelis, Fotona Medical Lasers) set to 10 Hz and 120 mJ for enamel, and 10 Hz and 80 mJ for dentin (settings for enamel and dentin ‘conditioning'). A total-etch adhesive (OptiBond FL, Kerr) with (AE) and without (N-AE) acid-etching and a self-etch adhesive (Clearfil SE Bond, Kuraray) were applied and a composite build-up was made (Z100). Micro-tensile bond strength (µTBS) specimens (2x2x9 mm) were trimmed into a round cross-sectional interface (± 1 mm2). The µTBS (MPa) was determined after 24 hours of storage in water at 37°C.

Conclusions: The total-etch adhesive bonded significantly less effective to lased than to bur-cut enamel/dentin. Laser ‘conditioning' was clearly less effective than acid-etching, by which the hypothesis was rejected. Moreover, acid-etching lased enamel and dentin significantly improved the bonding effectiveness of OptiBond FL. The self-etch adhesive bonded equally well to lased as to bur-cut enamel, but significantly less effective to lased than to bur-cut dentin. It is concluded that cavities prepared by laser appear less receptive to adhesive restorations than conventional bur-cut cavities.
Publication status: accepted
KU Leuven publication type: IMa
Appears in Collections:Biomaterials - BIOMAT
Department of Oral Health Sciences - miscellaneous
# (joint) last author

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