ASH Dental for Your Oral health is one of the best Dental Hospital in Irvine. Visiting your Irvine dentist at least Once every Six Months is important to your overall dental health, and we will demonstrate several reasons why. Despite much evidence that supports the idea of needing to visit a dentist regularly; there is a growing trend of people who are not coming in to see their oral health specialists as much as they should be, which is concerning.