是否真的需要每年洗牙, 才算健康 ?

It is because not everyone brush 100% well of their teeth...........
even I am dental assistant....some area will lack of care too.......
so why dentist advice at least go to check up the teeth one year.......

洗牙will not洗薄了牙齒表面, dont worried.........

Cleaning effect...........because some area you will lack of caring it........may be form a plaque(牙菌mok, stone).....this will cause periodontal disease牙周病.........

sorry for cannot type chinese........