The present study aimed to assess the effect of self-etch adhesives on microleakage of classV sandwich restorations.
Methods:
This study was carried out on 20 intact molars. Class V preparations were made on the buccal and lingual surfaces with the gingival margins placed 1 mm apical to the CEJ. A resin modified glass ionomer (Fuji II LC ) was placed in gingival floor of all prepared teeth . The teeth were divided into two groups. In first group SE-bond and in second group single bond was applied on the cavity walls and GI surface.
The cavities were then restored with composite (Z250) and kept in distilled water for 24 hours at 37ºC. Teeth were coated with two layers of nail varnish applied to within 1 mm of the restoration margins. All samples were subsequently immersed in 2% fuschin solution for 24 hours. The specimens were sectioned in a buccolingual plane , observed under a stereomicroscope and scored according to microleakage. Five- scale grading was used for examination. Data were analyzed by Mann-Witney test (p ˂0.05).
Results:
Mean values and standard deviations (MPa) were as follow : A) In self-etch groups : between two materials (0.25± 0.04), occlusal margin (0.7± 0.10), gingival margin (2.15± 0.16) B) In etch & rinse groups : between two materials (0.35± 0.04), occlusal margin (1.25± 0.17), gingival margin (2.35± 0.16).
The results indicated that there were no statistically significant differences between self-etch and etch & rinse groups (p ˃ 0.05).
Conclusions: In general, type of bonding had no significant effect on microleakage of sandwich restorations