Comparison of Helioseal F microleakage with 37% phosphoric acid and self – etch primer (In - vitro) Dr. Z. Bahrololoomi* - Dr. M. Nyazmand** *- Assistant Professor of Pedodontics Dept. - Faculty of Dentistry – Shaheed Sadoughi Yazd University of Medical Sciences. **- Dentist. Background and Aim: Recently, the use of self – etch primers, due to their ease of manipulation, for fissure sealant the...