Microleakage of Dyract AP compomers in class V preprations of deciduous teeth after air-dried versus not dried salivary contamination at the occlusal wall (in vitro study)

Abstract

This in vitro study was conducted to asses the affect of salivary contamination in
case of air dried or not dried (kept moist) before the application of the bonding agent
(prime and bond NT) on the microleakage of Dyract AP compomers (advance
performance) in primary molars at the occlusal wall of class V preparations and
compare it to the standardized technique of application.
Sixty class V cavities were prepared in 30 teeth (exfoliated primary molars), the
cavities were prepared in the middle third of the buccal and lingual surface of each
crown and randomly divided into three groups (each group consists of 20 cavities)
Group (I): air-dried after salivary contamination, Group (II): not dried after salivary
contamination (kept moist), Group (III): with out salivary contamination. After the
teeth were filled, stored in distilled water for 24 hours, thermocycled, stained with
basic fuchsin dye, sectioned to record the extend of dye penetration under
stereomicroscope. Results revealed that there is no difference in the linear
microleakage among groups at the occlusl wall. Although the differences were not
statistically significant, greater microleakage was found in group (I) indicating that if
salivary contamination occur, it is better to leave the preparation moist rather than
complete air dryness.