Li J
Center for Oral Biology at Novum, Karolinska Institute, Huddinge, Sweden.
J Oral Rehabil. 1997 May;24(5):358-60. doi: 10.1046/j.1365-2842.1997.00508.x.
The shear strength was measured of a polymerizing increment to a newly cured composite increment of the same material with various surface properties. The results showed that the materials with the original surface which had been cured against a cover glass resulted in a significantly higher bond strength than any of the other preparations. It was concluded that the unreacted double bonds (due to the oxygen inhibition) functioned as a bonding medium between two increments of dental composites. The process which impaired the original cured surface decreased the bonding between increments.
