Dr. Ettinger is Professor, Department of Prosthodontics and Dows Institute for Dental Research, University of Iowa; Dr. Chalmers is Associate Professor, Geriatric and Special Care Program, Preventive and Community Dentistry, University of Iowa; and Dr. Frenkel is Advisor in Community Dentistry (SW Region), SW Dental Postgraduate Deanery, Bristol Dental Hospital, Bristol, England. Direct corresp...