Özet:
Background Surface tension and contact angle properties, which play a crucial role in determining the effectiveness
of irrigation solutions in penetrating dentin surfaces and dentin tubules, are highly important for the development
of new irrigation solutions and their preferences. The aim of the current study was to compare the surface
tension and contact angle properties of different irrigation solutions used in endodontics, both on the dentin surface
and within dentin tubules.
Methods In this study, the contact angles and surface tensions of 5.25% sodium hypochlorite (NaOCl), 17% ethylenediaminetetraacetic
acid (EDTA), 2% chlorhexidine (CHX), 5% boric acid (BA), 0.02% hypochlorous acid (HOCl), 0.2%
chlorine dioxide (
ClO2), Biopure MTAD, QMix solutions, and distilled water (control group) were measured. Measurements
were conducted using a goniometer device (Attension Theta Lite Tensiometer, Biolin Scientific, USA), employing
the sessile drop method for contact angle measurements on pre-prepared dentin surfaces, and the pendant drop
method for surface tension.
Results Contact angle measurements revealed no statistically significant differences between the contact angle values
of MTAD, ClO2,
and CHX or between NaOCl, QMix, BA, and HOCl (p > 0.05). However, EDTA exhibited a significantly
greater contact angle than did MTAD, ClO2,
CHX, NaOCl, QMix, BA, and HOCl (p < 0.05). Furthermore, the contact angle
of dentin with distilled water was greater than that with all other solutions tested (p < 0.05). Surface tension measurements
revealed that the surface tension values of QMix and MTAD were statistically similar (p > 0.05). CHX exhibited
lower surface tension than distilled water and HOCl (p < 0.05), and it also had lower surface tension than ClO2,
NaOCl,
and BA (p < 0.05). Additionally, the surface tension of the samples treated with EDTA was greater than that of all other
solutions tested (p < 0.05).
Conclusion The direct linear relationship between the surface tension of liquids and contact angles on different
surfaces may not always hold true, and these values should be considered independently for each solution on various
surfaces. Considering the contact angles and surface tension properties of irrigation solutions with root canal dentin,
it can be suggested for clinical use that ClO2
could be recommended over NaOCl, and similarly, BA could be recommended
over EDTA.
