In Vitro Evaluation of Microleakage Properties of Etched/Non-Etched Air- Abraded and Conventionally Prepared Cavities: A Scanning Electron Microscopy Study
Tarih
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
Özet
Statement of the problem: Air-abrasion is an alternative cavity preparation technique using aluminum oxide particles and there is still a lack of microleakage for different cavity forms and restorative materials.
Objective: The aim of the study is to evaluate microleakage of etched/non-etched cavities prepared with air-abrasion and conventional technique using light and scanning electron microscopy.
Materials & Methods: 69 non-carious human molars were selected and randomly allocated to 9 groups: Group 1 (G1), Group 2 (G2), Group 3 (G3), Group 4 (G 4), Group 5A (G5A), Group 5B (G5B), Group 6A (G6A), Group 6B (G6B), Group 7 (G7). Class I cavities were prepared on the G1, G2, G5A, and G5B samples with air-abrasion technique whereas conventional method was used on the samples of G3, G4, G6A, and G6B groups. G7 was assigned as the control group. Adhesive and composite were applied without using acid etching in G1 and G3. G2 and G4 samples were acid etched prior to the bonding and composite application. The cavities of G5A and G6A samples were filled with temporary filling material. The G5B and G6B samples were not restored. No preparation or restoration was performed on G7 group teeeth. All samples were stored in distilled water at room temperature until thermocycling. Then the samples were immersed in 50% diluted indian ink at 37°C for 48 hours prior to the sectioning, microscopic evaluation and, assessment of dye penetration. The Kruskal Wallis and Mann Withney U test were used for comparisons of the obtained data (? = .05 for all tests)
Results: Statistically significant differences were found between Group 1 and 2, Group 1 and 3, Group 1 and 4, Group 2 and 3, Group 2 and 4, Group 3 and 4 (P < .05).
Conclusion: Due to the results of this study, acid etching is essential for the restoration of air-abraded and conventionally prepared cavities to prevent microleakage.
