Microleakage of Temporary Restorative Materials

Objectives: Temporary restorative materials used between endodontic appointments are important in influencing the success of root canal treatment. The main objective of using the materials is to provide coronal seal to prevent the entry of microorganisms and debris into the root canal. The objectives of this study were to evaluate the degree of microleakage of four temporary restorative materials used in endodontic procedures and to identify the most effective temporary restorative material in term of preventing microleakage. Methods: This was a laboratory experimental study using eighty human molar and premolar teeth (non-carious and non-restored crown). A standardized access cavity of 4mm x 4mm x 4mm was prepared on occlusal surface of each tooth. The teeth were then divided into four groups, of 20 teeth. Each cavity was then restored with one of the following materials: GC Fuji II LC, Caviton, GC Fuji IX and Kalzinol. This was followed by 2-hour incubation and 7-days immersion in 2% Methylene blue. Depth of penetration was measured using digital microscope after longitudinal sectioning of each tooth. Results: There was statistically significant different in microleakage among the temporary restorative materials tested (P<0.001). GC Fuji II LC produced the highest sealing ability with minimum and maximum leakages of 0.479mm and 1.992mm respectively, followed by Caviton and GC Fuji IX. Kalzinol had the least sealing ability with minimum and maximum leakages of 3.259mm and 5.424mm, respectively. Conclusion: Within the limitations of this study, GC Fuji II LC was found to be the most effective sealer compared to other tested materials.