Wetting Properties and Critical Micellar Concentration of Benzalkonium Chloride Mixed in Sodium Hypochlorite

被引:34
作者
Bukiet, Frederic [1 ]
Couderc, Guillaume [2 ]
Camps, Jean [2 ]
Tassery, Herve [1 ]
Cuisinier, Frederic [1 ]
About, Imad [2 ,3 ]
Charrier, Anne [4 ]
Candoni, Nadine [4 ]
机构
[1] UFR Odontol Montpellier 1, Lab Biol Sante & Nanosci, F-34193 Montpellier 5, France
[2] Aix Marseille Univ, UFR Odontol Marseille, Lab Interface Matrice Extracellulaire Biomat, Marseille, France
[3] Aix Marseille Univ, CNRS, ISM, UMR 7287, Marseille, France
[4] Univ Mediterranee, Ctr Interdisciplinaire Nanosci Marseille, CNRS, Marseille, France
关键词
Antibacterial effect; benzalkonium chloride; contact angle; critical micellar concentration; irrigation; nondehydrated dentin surface; sodium hypochlorite; surface energy; surfactant; wetting properties; SURFACE-TENSION; IRRIGANT FLOW; DISSOLUTION; INFECTION; EFFICACY;
D O I
10.1016/j.joen.2012.07.008
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Introduction: The purposes of the present study were to (1) assess the effect of the addition of benzalkonium chloride to sodium hypochlorite on its wetting properties, contact angle, and surface energy; (2) determine the critical micellar concentration of benzalkonium chloride in sodium hypochlorite; and (3) investigate the influence of addition of benzalkonium chloride on the free chlorine level, cytotoxicity, and antiseptic properties of the mixture. Methods: Solutions of benzalkonium chloride, with concentrations ranging from 0%-1%, were mixed in 2.4% sodium hypochlorite and tested as follows. The wetting properties were investigated by measuring the contact angle of the solutions on a nondehydrated dentin surface by using the static sessile drop method. The pending drop technique was subsequently used to determine the surface energy of the solutions. The critical micellar concentration of benzalkonium chloride mixed in sodium hypochlorite was calculated from the data. When 2.4% NaOCl was mixed with benzalkonium chloride at the critical micellar concentration, 3 parameters were tested: free chloride content, cytotoxicity, and antibacterial effects against Enterococcus faecalis. Results: The contact angle (P < .001) as well as the surface energy (P < .001) significantly decreased with increasing benzalkonium chloride concentrations. The critical micellar concentration of benzalkonium chloride in sodium hypochlorite was 0.008%. At this concentration, the addition of benzalkonium chloride had no effect on the free chlorine content, cytotoxicity, or antibacterial efficiency of the mixture. Conclusions: The addition of benzalkonium chloride to sodium hypochlorite at the critical micellar concentration reduced the contact angle by 51.2% and the surface energy by 53.4%, without affecting the free chloride content, cytotoxicity, or antibacterial properties of the mixture. (J Endod 2012;38:1525-1529)
引用
收藏
页码:1525 / 1529
页数:5
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