No dental modification required, grill fits over all teeth. Material: Brass base with zirconia stones, 24K gold plated / rhodium coated, UV protective layer. Silicone layer for comfortable wearing. Grillz are made from the same material used by professional boxers. "Smile for me" wearing instructions: Discontinue use immediately if pain occurs. 1. Do not wear while sleeping. 2. Do not wear during sports activities. 3. Do not wear while eating or chewing (gum, candy, etc.). 4. Not to be used as a substitute for orthodontic braces. 5. If dental treatment is scheduled, consult your dentist before use. 6. Do not share with others. 7. Avoid prolonged use. 8. Never use to bite people or animals. Golden care instructions: 1. Rinse with clean water after use and store in a dry place. 2. Do not clean with chemical agents. 3. After fitting, do not wash directly with hot water. 4. Do not place in microwave. 5. Do not store in areas exposed to high heat (car, balcony). 6. Keep away from children and pets. Warning: Grillz are intended for decorative use on teeth only. Iced Out Biz assumes no liability for health-related or material damage.