Teeth just plain don't decay in Deaf Smith County, on the sandy plains of the Texas panhandle. (Elsewhere in the U.S. 95 out of 100 have dental caries.) This remarkable fact was reported last week to the Houston meeting of the American Dental Association by Dr. Edward Taylor, chief dentist of the Texas State Board of Health.

Dr. Taylor picked at random 43 native-born Deaf Smithers ranging in age from two years to past "middle age." His findings: "Not one single carious tooth or filling was found." People with the usual number of cavities...