Are there any dental assistant job opportunities?

Although most nurses in Saudi are women, I doubt you'd find a hard time finding a job. However, as a nurse or medical assistant, keep in mind that your competition would be nurses from countries like the Philipines who are pretty "okay" in their fields and accept lower pay. That said, ive seen many, many American and British nurses, but all at government hospitals, not private ones or private clinics.

you will have no problem whatsoever.... I was just reading in a job forum here that Saudi is still in high demand for nurses of any type....

Yes there are. I am a dentist myself and where I work there is a shortage. Most of the assistants are females and mainly from the Philippines. Check Hospital websites, there should be a listing of available jobs.