"FFI during CMPB is to record your teeth health before you are
enlisted
FFI during ORD is the check that your teeth is 100% as it is
before you are enlisted.
This is to ensure that you cannot claim that SAF have destroyed
your teeth" said by my dental colleagues during NS.
If the dentist is kind enough he will ask you to fix your tooth
for free during your NS.
Some people grow wisdom teeth at this age, causing pain and
agony. So they have to pull them out. And thus they are given MC.
Thats' all.