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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
Effects of a ferric chloride primer on collagen-depleted dentin bonding between tri-n-butylborane initiated self-curing resin and dentin.
This study was designed to evaluate the micro-tensile bond strength between a carboxylic resin and dentin, when the dentin surface was modified with an experimental dentin primer.The three primers tested were ED primer II (ED), 0.3% ferric chloride aqueous solution (FE), and ED containing 0.3% ferric chloride (ED/FE).Three commercial dentin conditioners [40% phosphoric acid, 10% NaOCl, and 10% citric acid with 3% ferric chloride (10-3)] were also used.The coronal surfaces of extracted human molars were ground flat to dentin.The dentin surfaces were treated with phosphoric acid, NaOCl, or with one of the primers.The 10-3 was used without phosphoric acid or NaOCl as a control.A composite material rod was bonded to the dentin surface with 4-META/MMA-TBB resin.After 24-h immersion in 37 degrees C distilled water, 0.9 mm x 0.9 mm composite-dentin beams cut from the bonded specimens were stressed to failure in tension at 0.6 mm/min.The bond strengths were also evaluated after 5000 thermocycles.The bond strength of the group ED/FE was significantly higher than those of the 10-3, ED, and FE.After 5000 thermocycling, 10-3, ED and FE showed significant decrease in bond strength, although no significant decrease was seen for ED/FE.It was concluded that dentin surface treatment with phosphoric acid, NaOCl, and the ED/FE primer improved the bonding (p < 0.05) between 4-META/MMA-TBB resin and dentin, with or without thermocycling, while the bond strengths in the control group fell 34% following 5000 thermocycles.[1]
