Effect of EDTA treatment on the hybrid layer durability in total-etch dentin adhesives

Abstract

The effect of the ethylenediaminetetraacetic acid (EDTA) treatment on the hybrid layer durability of total-etch dentin adhesives was investigated. A flat dentin surface was exposed and treated with 37% phosphoric acid or 0.1M EDTA. Dentin adhesive was applied and a 4 mm thick composite resin was built-up. Twenty 0.9×0.9 mm 2 resin-dentin beams were fabricated in each experimental group. Artificial aging with 10% NaClO was performed in half of the experimental groups for 1 hour. A micro-tensile bond strength (µTBS) test was performed and the bonded interface was analyzed with transmission electron microscopy (TEM). The 37% phosphoric acid-treated group showed a lower µTBS after artificial aging, whereas the 0.1M EDTA-treated group did not. TEM analysis revealed collagen fibrils dissolved in the 37% phosphoric acid-treated group but not in the 0.1M EDTA-treated group. Undissolved minerals were observed in the 0.1M EDTA-treated group. In conclusion, a dentin treatment with 0.1M EDTA is effective in improving the hybrid layer durability.

Comparative study of the dentin bond strength of a new universal adhesive

“…Single Bond Plus includes polyalkenoic copolymer in its composition that can improves moisture tolerance of the adhesive 18,19) . It was shown in the TEM micrographs and its morphology was similar to that of other studies 20,21) , however there has been no evidences that it could enhance the bond strength so far. One-Step Plus uses an acetone as its solvent 22) .…”

Microshear bond strength according to dentin cleansing methods before recementation

“…According to some researchers, 17% EDTA usage did not significantly alter or decrease the µSBS values14,37 while others concluded that dentin treatment with EDTA is effective in improving bond strength 15,38…”

“…Laser energy is delivered through a fiber optic system to a sapphire tip terminal 19,22,44. The average output can be varied from 0.1 W to 8 W. For dentin irradiation, several investigations have suggested irradiation outputs varying from 1.25 W to 5 W can be used 19,21,22,38,44. In a study it has even used the maximum output power of 5 W,19 providing increased value of energy density and as a consequence, a higher efficiency of laser ablation.…”

Impact of oxalate desensitizer combined with ethylene-diamine tetra acetic acid-conditioning on dentin bond strength of one-bottle adhesives during dry bonding

“…This finding is similar to the results of previous studies. [1315181920] EDTA can remove the smear layer and mildly demineralize the dentin. The thin EDTA-demineralized collagen matrix contains intrafibrillar mineral, preserving its spongy and stable state, and hence may improve resin infiltration.…”

“…The thin EDTA-demineralized collagen matrix contains intrafibrillar mineral, preserving its spongy and stable state, and hence may improve resin infiltration. [16181920] The resultant more homogenous hybrid layer may be strong and could produce a high bond strength due to possible chemical interaction between acidic/functional monomers with calcium in residual mineral within the collagen fibrils. [1319] This phenomenon is referred as 3-phase hybridization instead of 2-phase one.…”