Fig. (1) Mean tensile bond strength in non-demineralized and demineralized dentin. The asterisks indicate significant differences compared to the control group (p ≤ 0.05; Mann-Whitney U test). CAP I = plasma jet (kINPen^® MED, neoplas tools GmbH, Greifswald, Germany), CAP II = DBD plasma source (PlasmaDerm^®, Cinogy, Duderstadt, Germany).