Enamel Repair Expert Bionic Repair Technology: The core ingredient, hydroxyapatite, is consistent with the composition of natural tooth enamel and can penetrate into the enamel micropores to fill the defects, form a protective layer, enhance the tooth's ability to resist acidity, and repair damages caused by abrasion and acid erosion. Clinically proven results: 28 days of continuous use, enamel hardness increased by 3.3 times, repair power increased by 30%, significantly improve dentin sensitivity. Multi-functional protection, comprehensive oral care Prevent caries: Combine with tooth enamel to form an anti-acid barrier, reduce bacterial adhesion, reduce the risk of caries. Whitening and stain removal: tiny particles penetrate deep into the crevices of the teeth to remove plaque, food debris and pigmentation, restoring the natural lustre of the teeth. Relieve sensitivity: Forms a protective film on the surface of the teeth, blocking cold, hot, sour and sweet stimuli, reducing sensitivity and discomfort. Safe and gentle for the whole family Fluoride-free formula: Fluoride-free to avoid the risk of dental fluorosis, safe for children, pregnant women and people with fluoride allergies.Non-abrasive particles: cleans without harming tooth enamel, long-term use does not wear teeth. Usage Scenarios Daily care: use in the morning and evening to repair enamel and prevent caries and sensitivity. Special needs: suitable for people with sensitive teeth, enamel wear, yellow teeth stains. Family sharing: non-fluoride formula, children, adults, the elderly can use, a bottle to solve the oral problems of the whole family.