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Titanium tetrafluoride incorporated into a two-step self-etching adhesive system: physico-mechanical characterization
Roberta Tarkany Basting1, Rosanna Tarkany Basting2, Sioni Velarde Barrientos1
1São Leopoldo Mandic Dental School and Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755 São Paulo, Brazil.
Summary
Titanium tetrafluoride (TiF4) in self-etching adhesives did not affect long-term dentin bond strength. However, TiF4 incorporation influenced flexural strength and degree of conversion, with TiF4 in the primer showing better stability.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials
Background:
- Self-etching adhesive systems are crucial for dental restorations.
- Incorporating additives like Titanium tetrafluoride (TiF4) aims to enhance adhesive properties.
- Long-term stability and physico-mechanical characteristics of modified adhesives require thorough evaluation.
Purpose of the Study:
- To assess the long-term impact of TiF4 in self-etching adhesive primers or bonds on dentin bonding.
- To evaluate the physico-mechanical properties of TiF4-containing adhesives.
Main Methods:
- Dentin bonding was tested using microtensile bond strength (µTBS) after 24h, 6 months, and 1 year.
- Failure modes, degree of conversion (DC), and flexural strength (FS) were analyzed.
- Particle size (PS), polydispersity index (PI), and zeta potential (ZP) of TiF4 adhesives were measured.
Main Results:
- No significant differences in µTBS or failure modes were observed among groups over time.
- TiF4 significantly affected FS, particularly when incorporated into the bond (B).
- The degree of conversion (DC) was higher for TiF4 in the primer (P) compared to the bond (B).
Conclusions:
- TiF4-containing adhesives do not compromise long-term dentin bonding or failure modes.
- While TiF4 affects FS and DC, TiF4 in the primer (P) demonstrates excellent stability.
- Further research may explore optimal TiF4 incorporation strategies for improved adhesive performance.
