Clinical Significance
Although the advantages of mild self-etch adhesives seem apparent in laboratory investigations, this long-term clinical study shows that the self-etch and etch-and-rinse adhesives performed comparably for the
Hands OnLong-term clinical adhesive performance
Section snippets
Background
For dentin bonding, mild self-etch adhesives have been favored over stronger adhesives. Laboratory studies show that mild dentin etching may allow some mineral to remain complexed with the superficial dentin, perhaps reducing hybrid layer deterioration and bond failure. In addition, the mild product’s resin monomers with a chemical affinity for hydroxyapatite may form more stable bonds than with stronger adhesives. Data on the clinical performance of mild self-etch adhesives has been limited to
Methods
Thirty-nine participants took part in this randomized controlled clinical trial. The lesions studied were notch-shaped non-carious cervical lesions (NCCLs). Before adhesive procedures were done, the NCCLs were roughened, but no enamel bevel or mechanical retention was used. The NCCLs were restored with composite resin, and restorations were finished immediately after placement and were assessed (baseline analysis). The parameters evaluated were retention, marginal discoloration, marginal
Results
The recall rate at 6-year follow-up was 76.9% for patients and 77.5% for restorations. Analysis revealed that retention rates after 6 years were 83.3% for Xeno IV, 72.4% for Xeno III, and 88.2% for XP Bond. These values were not statistically significantly different.
Marginal discoloration was not seen in 77.8% of the Xeno IV, 71.4% of the Xeno III, and 86.7% of the XP Bond restorations after 6 years. These values were not statistically significantly different.
The maintenance of optimal marginal
Discussion
The performance of the three adhesive systems was comparable over the course of 6 years. No significant differences were noted between them with respect to retention, marginal discoloration, marginal adaptation, sensitivity, or the development of secondary caries.
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Boushell LW, Heymann HO, Ritter AV, et al: Six-year clinical performance of etch-and-rinse and self-etch adhesives. Dent Mater 32:1065-1072, 2016
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