Have you went for the consultation? If yes how much did Casa Dental quote you for Invisalign? How long do you need to wear? I heard other clinics have referral program too.
Now the subsidy is not as high already.. haiz..I did it in Yishun neighborhood dentist for $3800 many years back. I think they are charging $4500 now. I can consider doing at NDC too. Get a referral letter from polyclinic to do braces at a heavily subsidized rate ^^