Hydroxyapatite is highly similar to the composition of natural enamel. It can penetrate and fill microcracks and demineralized areas of enamel, promote remineralization through physical filling and chemical bonding, repair early caries and enhance the tooth's resistance to acid erosion.
Nano-scale hydroxyapatite particles can form a dense protective layer on the exposed dentin surface, block more than 80% of the openings of dentinal tubules, significantly reduce the sensitive pain caused by cold, hot, sour and sweet stimulation, and the effect is better with continuous use.
It inhibits the activity of cariogenic bacteria such as Streptococcus mutans by neutralizing the acidic environment of the oral cavity, and physically covers the tooth surface to reduce bacterial attachment. Experiments show that its anti-caries effect is equivalent to that of fluoride toothpaste, reducing the rate of dental plaque formation.
Micron-scale crystals gently remove exogenous pigments such as tea stains and coffee stains through physical friction, avoid peroxide bleaching damage, and cooperate with calcium ion deposition to improve the transmittance of enamel and achieve a natural whitening effect.