Improved dental adhesive formulations based on reactive nanogel additives.
J Dent Res
; 91(2): 179-84, 2012 Feb.
Article
en En
| MEDLINE
| ID: mdl-22019910
ABSTRACT
Current challenges in adhesive dentistry include over-hydrophilic bonding formulations, which facilitate water percolation through the hybrid layer and result in unreliable bonded interfaces. This study introduces nanogel-modified adhesives as a way to control the material's hydrophobic character without changing the basic monomer formulation (keeping water-chasing capacity and operatory techniques unaltered). Nanogel additives of varied hydrophobicity were synthesized in solution, rendering 10- to 100-nm-sized particles. A model BisGMA/HEMA solvated adhesive was prepared (control), to which reactive nanogels were added. The increase in adhesive viscosity did not impair solvent removal by air-thinning. The degree of conversion in the adhesive was similar between control and nanogel-modified materials, while the bulk dry and, particularly, the wet mechanical properties were significantly improved through nanogel-based network reinforcement and reduced water solubility. As preliminary validation of this approach, short-term micro-tensile bond strengths to acid-etched and primed dentin were significantly enhanced by nanogel inclusion in the adhesive resins.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Cementos de Resina
/
Nanopartículas
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Dent Res
Año:
2012
Tipo del documento:
Article