Comparative wettability of different sodium hypochlorite solutions

SummaryObjectivesThe present study evaluated the dentin wettability of sodium hypochlorite (NaOCl) with and without the addition of surfactants.Materials and methodsTwelve premolars roots were longitudinally split using a low-speed rotary diamond saw. The 24 specimens were randomly distributed into four experimental groups: Group 1=5.25% NaOCl; Group 2=Hypoclean; Group 3=Chlor-Xtra; Group 4=freshly produced MilliQ water (distilled water). Three different contact angles were measured: the sessile angle, the advancing angle, and the receding angle. All angles were measured with a goniometer Krüss G 23.ResultsThe highest contact angle was observed in Group 4 (control group), considering both sessile and advancing angles. Hypoclean and Chlor-Xtra solutions immediately spread on the dentin surface, yielding a zero-degree contact angle. Pure NaOCl solution showed a 35-degree sessile contact angle and a 64-degree advancing contact angle. The detected receding angle was zero.ConclusionsObtained data clearly showed the superior wettability of Hypoclean and Chlor-Xtra in comparison to pure NaOCl and distilled water