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.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Morães RR,Garcia JW,Wilson ND,Lewis SH,Barros MD,Yang B,Pfeifer CS,Stansbury JWdoi
10.1177/0022034511426573subject
Has Abstractpub_date
2012-02-01 00:00:00pages
179-84issue
2eissn
0022-0345issn
1544-0591pii
0022034511426573journal_volume
91pub_type
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