A laboratory study of coronal microleakage using four temporary restorative materials

Area of Science:

• Dental Materials Science
• Restorative Dentistry

Background:

• Temporary coronal filling materials are crucial for maintaining the integrity of the tooth during dental treatment.
• Evaluating the sealing ability of these materials is essential to prevent microleakage and secondary caries.

Purpose of the Study:

• To compare the microleakage and sealing efficacy of Fermin and Canseal against established temporary filling materials, Cavit and Caviton.
• To assess the influence of thermal and load cycling on the sealing performance of these materials.

Main Methods:

• 160 human molar teeth underwent standardized cavity preparation and restoration with Fermin, Canseal (two ratios), Caviton, or Cavit.
• Microleakage was evaluated using methylene blue dye penetration after thermal and/or load cycling.
• Statistical analysis involved two-way ANOVA and Fisher's PLSD post hoc test.

Main Results:

• Fermin, Caviton, and Cavit showed microleakage up to Grade 2, with observable dye penetration.
• Canseal exhibited complete leakage, particularly after thermal cycling.
• Significant differences in microleakage scores were found between materials and conditions (P < 0.0001).

Conclusions:

• Fermin demonstrated superior sealing ability compared to Caviton, Cavit, and Canseal.
• Thermal cycling had a more pronounced negative effect on the seal of certain temporary filling materials than load cycling.