Taira Y, et al. Journal of Dental Sciences, 2019, 14(1), 109-112.
This study examined the use of tetrabutylammonium dihydrogen trifluoride (TDTF) in enhancing the durability of resin-titanium bond strengths for dental applications. Commercially pure titanium (cpTi) specimens were air-abraded with alumina particles to prepare the surface before treatment with an etchant containing TDTF (Monobond Etch & Prime; ETCH) for either 10 s (ETCH10) or 30 s (ETCH30). A control group of non-etched specimens (no-ETCH) was also included. Following the surface treatment, the specimens were rinsed, primed with a phosphoric monomer-based primer, and bonded to an indirect resin composite. Shear bond strengths were measured both before and after 100,000 thermocycles to assess bond durability.
The results showed that both ETCH10 and ETCH30 specimens exhibited the highest bond strengths, which remained stable after the thermocycling procedure, indicating excellent durability. In contrast, the no-ETCH specimens demonstrated significantly lower bond strengths. Statistical analysis using a non-parametric Steel-Dwass test (α = 0.05) confirmed the superiority of TDTF treatment in enhancing bond durability. In conclusion, surface treatment with TDTF-containing etchants effectively improves the long-term stability of resin-cpTi bonds, providing valuable insight for clinical applications in dental restorative procedures.
