| Abstract |
The purpose of the study was to evaluate the effect of different saliva-contaminated which 5 (C5) and 30 (C30) seconds and re-etching time which 5 (E5), 15 (E15), and 20 (E20) seconds on the shear bond strength of hydrophilic sealant. One hundred and eighty extracted premolars were randomly divided into 9 groups (N=20) including Group 1 – noncontaminated enamel and applied according to the manufacturer’s instructions (Co), Group 2 – C5, Group 3 – C5+E5, Group 4 – C5+E15, Group 5 – C5+E20, Group 6 – C30, Group 7 – C30+E5, Group 8 – C30+E15, Group 9 – C30+E20. The sealant was bonded on all specimens, subsequently were thermocycled for 5,000 cycles between 5°c and 55°c. The shear bond strength test was using a universal testing machine. The result of this study revealed that group 1 showed a significantly higher shear bond strength than those the saliva-contaminated groups (group 2, 6) (p<0.05). There was no statistically significant difference between group 2 – 5 (p>0.05). On the other hand, within-group 6 – 9, Group 6 was significantly lower than group 8 (p<0.05). It could be concluded that salivary contamination undermined the adhesion of the hydrophilic sealant to enamel and reduced bond strength. It could be noticed that the longer the saliva-contaminated time, the lower the shear bond strength values, the longer the re-etching time, the higher the shear bond strength values. Therefore, Re-etching on saliva-contaminated pit and fissure should be done to provide the best adhesion. |
Publication
Journal Publication
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