A dentist extracts teeth at the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. Picture taken July 20, 2012. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

A boy gets a free tooth extraction during an event organized by Iglesia ni Cristo (Church of Christ), a local Christian movement in the Philippines, in an attempt to set a Guinness World Record for the most dental examinations conducted in 24 hours at a slum community in Manila July 7, 2012. REUTERS/Cheryl Ravelo (PHILIPPINES - Tags: HEALTH SOCIETY RELIGION) 

A dentist with NGO Island Impact Ministeries works in a provisional camp in Port-au-Prince March 20, 2010. International donors are ready to provide $3.8 billion over 18 months to help Haiti rebuild after its devastating January 12 earthquake, experts and officials preparing a high-level donors conference said. REUTERS/Eduardo Munoz (HAITI - Tags: DISASTER SOCIETY POLITICS HEALTH) 

Don Clay of Texas is examined by a dentist at Rio Dental clinic in the border city of Ciudad Juarez January 24, 2008. Shrugging off concerns about hygiene and Mexico's brutal drug war, thousands of Americans are heading to Ciudad Juarez and other Mexican border cities for cheap dental treatment. Picture taken January 24, 2008. REUTERS/Tomas Bravo (MEXICO) 

A Hungarian dentist extracts a tooth from an Austrian patient in Sopron western Hungary on January 14, 2004. Thousands of patients from Austria and Germany are flocking across the border for cut-price Hungarian dentistry as healthcare reforms at home raise prices. Former communist Hungary's western border, the old Iron Curtain, has more dentists per head of population that anywhere in the world. HALTH REUTERS/Laszlo Balogh PP04040011 LB/CRB