Choosing a dentist (Tandarts) is just like choosing your doctor. Dentists are in high demand in the Netherlands, so you may need help from your HR contact to find a local dentist accepting new patients.
Call as soon as possible and get your family's names on the waiting list. You will also find a 24-hour dentist emergency service (‘Algemene Tandartsen Spoedgevallen’). Dental care tends to be expensive; if you want, you can get a written estimate for recommended treatment prior to undergoing the procedures.