The last time I visited a dentist (before this year) was five
years back.
Then, earlier this year, I spotted an alarming cavity in one of
my canines.
I saw the NUS dentist, and he went tsk, tsk, tsk..... he had
spotted three more cavities. 
Man, the damage to my wallet was verdamn awesome. 
That's why you need to get a yearly check up and a cleaning
every 6 months. *gets off soapbox*