Dr. Byrne is an associate professor, Department of Adult Restorative Dentistry, College of Dentistry, University of Nebraska, 40th and Holdrege, Room 128, Box 830740, Lincoln, Neb. 68583-0740, e-mail “[email protected]”. He also is an evidence reviewer for the American Dental Association. Address reprint requests to Dr. Byrne. Clinical question. Are there any differences in outcomes between onest...