Method: Three commercial adhesives (Clearfil S³ Bond (CS³)/Kuraray, Clearfil SE Bond – bond/control group (CSE)/Kuraray, Optibond Solo Plus (OS)/Kerr and one experimental adhesive L759 (EXL759)/3M/ESPE) were evaluated. Specimen disks (n=12) were obtained (5.0x1.0mm). Half of the specimens (n=6) was either evaporated for 30s (E) or not evaporated (N). The adhesives were photoactivated for 40s (450mW/cm2). After desiccation, the specimens were weighed and then stored in distilled water for evaluation of the kinetics of water diffusion over a 7-day period (ISSO4049). The disks were incubated in either water or mineral oil. Net water uptake (%) was also calculated as the sum of Wsp and Wsl. Data were submitted to 2-way ANOVA /Tukey's test (α=5%).
Result:
Statistical analysis revealed that only the factor ‘adhesive’ was significant (p<0.05). Solvent evaporation had no influence in the Wsp and Wsl of the adhesives. CSE (control) presented significantly lower net uptake (5.4%).
Adhesive |
Wsp Oil (μg/mm3) |
Wsl Oil (μg/mm3) |
Wsp Water (μg/mm3) |
Wsl Water (μg/mm3) |
Net Water Uptake (%) |
CSE |
7.6±2.1aB |
1.1±3.4aA |
57.1±5.8cA |
-2.9±4.9cA |
5.4±0.9a |
CSE3N |
9.6±4.3aB |
17.8±7.7aB |
117.3±8.8bA |
66.4±7.7bA |
18.4±1.6b |
CSE3E |
8.6±4.3aB |
20.3±7.9 aB |
135.3±56.9abA |
78.7±35.2abA |
21.4±9.2b |
OSN |
5.5±7.9aB |
20.1±16.5 aB |
133.0±18.9abA |
82.4±6.9abA |
21.5±2.5b |
OSE |
5.9±8.6aB |
17.5±6.6aB |
154.6±5.4aA |
91.9±5.8aA |
24.6±0.9b |
EXL759N |
5.3±6.8aB |
18.4±11.9aB |
113.3±10.3bA |
71.9±13.9abA |
18.5±2.2b |
EXL759E |
8.9±1.8aB |
19.6±7.4aB |
113.2±4.6bA |
66.5±6.5bA |
17.9±0.9b |
Different letters (upper for rows, lower for columns): significant (p<0.05).
Conclusion: Evaporation procedure has no influence in the kinetics of water diffusion of the experimental adhesive. Water sorption and solubility parameters of the experimental adhesive were similar to that of the majority of the commercial products.