A comparative study to evaluate the effect of cleaning solutions on surface characterization of saliva contaminated lithium disilicate ceramic using scanning electron microscope. an in-vitro study

Objectives: To compare and evaluate the effect of cleaning solutions on surface morphology of saliva contaminated lithium disilicate ceramic. Methods: 30 lithium disilicate ceramic discs of IPS e.max were prepared. The substrate surfaces were conditioned according to manufacturer’s instructions. Scanning electron microscope was used at 1000x and 25000x magnification for qualitative examination. Specimens were divided into 2 Groups (n=15), Group I treated with Ivoclean, Group II treated with 30% Sodium Silicate. Following which the specimens were contaminated with saliva and treated with cleaning solution. Specimens were examined using Scanning electron microscope for qualitative examination. Results and Interpretation: SEM image analysis showed that the surface appearance of the specimens after saliva contamination and cleaning solutions was better with increased surface irregularities in Group II treated with 30% Sodium silicate rather than Group I specimens treated with Ivoclean solution. EDX representative images showed high levels of Si on the ceramic surface after treating with cleaning solutions in Group II when compared to Group I. Deposition of a thin film of silica facilitated an effective bond. Conclusion: The surface appearance of lithium disilicate ceramic after saliva contamination and treatment with cleaning solution of Ivoclean and 30% Sodium silicate was comparable but the surface was more irregular and porous in Group II treated with sodium silicate suggestive of micromechanical retention for enhanced bonding.