This text book contains matter that how to conserve the tooth by using non surgical technique or by preventive method OR by remineralize the carious lesion. Minimal intervention is not just a technique it is a philosophy. The future promises further evolution toward a more primary preventive approach, facilitated by emerging technologies for diagnosis, prevention and treatment. Even though a substantial base of evidence supports a minimally invasive approach to the carious disease. we still need long term evidence based clinical evaluations to establish the concept of Minimally Invasive Dentistry in routine clinical practice