LUBBOCK, Texas (AP) -- If you're looking for cavity-free pearly whites, search anywhere but Lubbock, Texas. But another Southern city -- Nashville -- ranks among the best cities for healthy teeth.

A new study in next month's Men's Health magazine says this West Texas city has the worst teeth of the 100 large U.S. cities examined. The magazine said the best teeth could be found in Madison, Wis.; Nashville, Tenn.; and Raleigh, N.C.

Some blame the high level of fluoride in Lubbock's well water. Dentists say too much fluoride in the water may cause the enamel on teeth to become rough, leaving brown or white stains. Others say the high cost of dental care is to blame, leaving poor people without proper checkups or education.

The study used data from the Centers for Disease Control and Prevention on the number of annual dentist visits, canceled appointments, regular flossers and households using fluoride.

(Copyright 2008 by The Associated Press. All Rights Reserved.)