[Effect of chlorhexidine-loaded halloysite nanotube on human dentin bond strength].

PURPOSE

To evaluate the effect of chlorhexidine-loaded halloysite aluminosilicate clay nanotube (HNT) incorporation into a two-step etch-and-rinse (ONE-STEP) and a self-etch (XENO Ⅴ) adhesive on human dentin tensile shear strength (TSS).

METHODS

Ten groups (n=12) were prepared according to the adhesive system and amount of CHX/HNT incorporated (5%, 10%, 15%) as follows: XE control(A1), XE experimental control (A2), 5% CHX/HNT-XE (A3), 10%CHX/HNT-XE (A4), 15% CHX/HNT-XE (A5), OS control (B1), OS experimental control (B2), 5% CHX/HNT-OS (B3), 10% CHX/HNT-OS (B4), 15% CHX/HNT-OS (B5). TSS testing was performed after 24 h. Scanning electron microscopy of the resin-dentin interface of selected specimens was carried out. One-way ANOVA was used to evaluate the TSS date in XE groups and OS groups. Two-way ANOVA was used to evaluate the effect of the adhesive system and the CHX/HNT content on dentin TSS with SPSS 19.0 software package.

RESULTS

The TSS date of 5% CHX/HNT-XE was significantly higher than the other groups. The TSS date of 10% CHX/HNT-OS was significantly higher than the other groups (P<0.05). No significant difference was detected between adhesive systems and dentin TSS. significant difference was found between CHX/HNT content and dentin TSS.

CONCLUSIONS

CHX/HNT addition into dentin adhesive increased bond strength to dentin.