I believe Dental Schools would wave those credit requirements since we have a BDS Degree and that we have passed NBDE's. May be you need to send the ECE report to the school to prove that. Again you might want to confirm it with adea/aadsas.
Here is the link that might be of some help.
http://www.adea.org/dental_educatio...plication/Pages/InternationalTranscripts.aspx
"Q: I graduated from an international dental school and am seeking admission into a U.S./Canadian dental school. I plan to complete the full dental school course of study (I am not seeking an Advanced Standing Program). Should I apply through AADSAS?
A: Yes, you may apply through ADEA AADSAS to a regular course of study in a dental school."