44. 1. Pulp vitality not compromised. 2. Can remove caries effectively. 3. Can perform cavity preparation effectively. 4. Quality of cavity preparation equivalent to that with the handpiece. 5. Less anxiety, pain free and anesthesia free. 6. Little or no post-operative discomfort. 7. Ideal for children and adults (comforting for both patient and parent). 1. Limitation of ErYAG: do not ablaze amalgam, gold and porcelain.