According to the abstract, the G4 group(finishing with low speed + laser + acid) was statistically indifferent from the G5 control group(conventional bur preparation + acid). If the researchers applied a slow speed round bur to the margins of the G4 group after Er:YAG preparation, loose enamel/dentin and products of laser ablation would be removed. This would correlate with the finding of many clinicians that hand instrument planing of margins after erbium laser preparation appears to improve marginal integrity of composite restorations.

Do many folks use Fuji II LC as the entire Class V restoration(except for maybe a patch job on a crown)? I used the old Ketac LC glass ionomer years ago with disastrous results(rapid wear or just fell out). To me it seems that resin modified glass ionomers are best used on dentin at the depths of the restoration and then the exterior of the Class V should be composed of either composite resin or amalgam.

Al