Declaration of a Guarantor... can I use my orthodontist who has only known me for a few months?

Have any of the staff in the office, like the receptionist, been there since the beginning? You could get one of them to sign... In fact, you could get anyone to sign who's known you for more than 2 years and can attest to your identity, as long as they aren't related to you. They got rid of the requirement a few years ago that it be someone from a "respected" profession.