Toothpastes don't just clean teeth anymore. They have special ingredients for preventing decay, plaque control, tartar control, whitening, gum care or helping sensitive teeth.
牙膏并不清洁牙齿，他们只是含有特殊物质预防龋坏，控制菌斑，增白，保护牙龈或者保护改善牙齿过敏。
2
By 10-15 years: teeth are worn, and heavy tartar build-up is likely with the possibility of some teeth missing.
10 - 15岁，牙齿磨坏了，严重的牙垢，还有些牙齿都脱落了。
3
By 3-5 years: All teeth may have tartar build-up and some tooth wear.