Dental hygienists clean teeth and examine patients for oral diseases. They use tools like ultrasonic scalers and take x-rays to assess patients' dental health. Dental hygienists typically work 2-3 days a week in a dental office and earn $68,250 - $93,820 annually. They enjoy helping improve patients' oral health but may find dealing with bad teeth or difficult patients challenging. An associate's degree in dental hygiene is required, which generally takes 2-3 years to complete.