Aim: The purpose of this study was to compare the water sorption and solubility of four provisional, three permanent luting cements and five restorative cements.
Methods: A split ring mould was fabricated for the preparation of specimen discs which were 15.0 mm in diameter and 1.5 mm thick. All specimens were manipulated according to the manufacturer's instructions and then subjected to water sorption and solubility tests. Data were analysed with Wilcoxon Signed Ranks Test. Scanning electron microscopy was used to evaluate surface topography and roughness.
Results: All tested materials demonstrated different degrees of sorption and solubility. The difference between sorption and solubility was statistically significant. Some materials were retained water in their structure and thus were compensated the loss of mass due to dissolution. It was found that zinc phosphate and zinc polycarboxylate cements were the most stable materials for solubility and sorption.
Conclusion: The most important properties of cements are their solubility and resistance to disintegration in saliva. This is an important concern for clinicians. If the cement dissolves or deteriorates under a restoration, leakage can result in sensitivity and caries in clinic and patients suffer from toothache.