I used to have my teeth checked and cleaned every 6 months in the States. Even the doctor said my teeth are excellent, the nurse, or whatever you called her, still spent much time using the metal thing to scratch plague off my teeth. Today I had my teeth cleaned the first time in Hong Kong. The dentist just used high pressure water, and then brushed my teeth. It took less then 10 minutes. Is it normal in Hong Kong? I felt I got jipped.