Comparative evaluation microleakage of total etching and self-etching adhesive systems in primary dentition

conservative procedures using dentin-bonding agents are one of the important aspects of pediatric dentistry. The Purpose was to comparatively evaluate the microleakage of total etching single bottle system(Single Bond) to self-etching adhesive system(Prompt-L-Pop) in primary dentition. Thirty extracted sound primary molars were selected. One class V cavity preparation was prepared in flat buccal/lingual surfaces of all teeth. Then the specimens were divided into two groups. In Group1, Solution from two bottles of Prompt - L - Pop were mixed and applied. In Group 2after etching with 35% phosphoric acid, Single Bond was applied. All the cavities were filled with composite (Z-100). The teeth were thermocycled between 5 and 55 degrees C with a dwell time of 30 seconds and then stored in normal saline. All teeth were sealed apically and coated within 1mm of the margin with two layers of nail varnish. After Basic fuschin dye immersion for 24 hours, buccolingual cuts parallel to the long axis of the teeth were made. Degree of Microleakage was evaluated and scored under stereomicroscope. The results were analyzed by mann-Withney test. Score 0.1 was noted in Prompt - L - Pop group, and scores 1,2,3 in Single Bond group. The finding illustrates significant difference in microleakage between two types of adhesive systems, since less microleakage was found in Prompt - L -Pop group. It was conclded that concerning the single step application and lower microleakage, the self-etching adhesive is better for bonding in primary dentition.