There are no fully online programs leading to an Associate's or Bachelor's degree in Dental Hygiene. Dental hygiene programs require extensive hands-on clinical experience, which is impossible to replicate fully online. While some schools might offer *some* online courses as part of a primarily in-person program, a completely online degree in dental hygiene is extremely rare, if not nonexistent.
You will need to find a college or university with an accredited dental hygiene program that offers a combination of online and in-person instruction. It is crucial to find a program accredited by the Commission on Dental Accreditation (CODA) to ensure your degree is recognized by employers.