Dental tourism (also called dental vacations or commonly known as dental holidays in Europe) is a subset of the sector known as medical tourism. It involves individuals seeking dental care outside of their local healthcare systems and may be accompanied by a vacation. Dental tourism is growing worldwide: as the world becomes ever more interdependent and competitive, technique, material, and technological advances spread rapidly, enabling providers in "developing countries" to provide dental care at significant cost savings when compared with their peers in the developed world.
Many countries have excellent national health insurance schemes -India for example. Teeth, for some reason, are often not considered part of the 'body' and coverage is usually minimal. Dental tourism then becomes a necessity rather than a luxury.
If you can afford to go to the dentist at all, then you can afford to travel overseas for treatment – and throw in a vacation for free!