We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of resin hydrophilicity on water-vapour permeability of dental adhesive films.
- Authors
King, Nigel M.; Hiraishi, Noriko; Yiu, Cynthia K. Y.; Pashley, Edna L.; Loushine, Robert J.; Rueggeberg, Fred A.; Pashley, David H.; Tay, Franklin R.
- Abstract
This study examined the water-vapour permeability of thin polymerized resin films fabricated from five co-monomer blends of increasing degrees of hydrophilicity, as measured by their Hoy's solubility parameters. Neat resin films were prepared from five experimental light-curable resins ( n = 10). Each film was mounted in a Fisher permeability cup with 8 g of water placed inside the cup. The experiments were conducted in a modified twin-outlet desiccator connected to a vacuum pump in one outlet to permit a continuous airflow to encourage water evaporation. Weight losses by water evaporation were measured at 3, 6, 9, 24, 30, and 48 h by using an analytical balance. Additional resin films were examined by using transmission electron microscopy (TEM) after immersion in ammoniacal silver nitrate. A significant correlation was observed between the cumulative water loss at 48 h and the Hoy's total cohesive energy density ( δt). Transmission electron microscopy revealed silver-filled channels along film peripheries and silver grains of decreasing dimensions toward the film centres in co-monomer blends 3, 4, and 5 of increasing hydrophilicity. Hydrophilic dentin adhesives polymerized in thin films are prone to water loss by evaporation. This probably accounts for the water droplets seen on the surface of vital-bonded dentin after the application of simplified dentin adhesives.
- Subjects
DENTAL materials; GUMS &; resins; DENTAL adhesives; MONOMERS; DENTAL care; DENTISTRY
- Publication
European Journal of Oral Sciences, 2005, Vol 113, Issue 5, p436
- ISSN
0909-8836
- Publication type
Article
- DOI
10.1111/j.1600-0722.2005.00231.x