OCTOBER 2016, VOL. 147 NO. 10 EDITOR Michael Glick, DMD, professor and William M. Feagans chair, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY ASSOCIATE EDITORS Clinical Dentistry Mark S. Wolff, DDS, PhD, professor and chair, Department of Cariology and Comprehensive Care, and associate dean, Pre-doctoral Clinical Education, College of Dentistry, New York University, New York, NY Dentistry and Medicine Douglas E. Peterson, DMD, PhD, professor of oral medicine, Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT; and chair, Program in Head and Neck Cancer and Oral Oncology, Neag Comprehensive Cancer Center, University of Connecticut Health Center, Farmington, CT Evidence-Based Dental Practice James D. Bader, DDS, MPH, research professor, Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, NC Research Bruce L. Pihlstrom, DDS, MS, professor emeritus, Department of Surgical and Developmental Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN SECTION EDITORS Clinical Scans Wenche S. Borgnakke, DDS, MPH, PhD, adjunct clinical assistant professor, School of Dentistry, University of Michigan, Ann Arbor, MI. Romina Brignardello-Petersen, DDS, MSc, PhD, lecturer, Evidence-Based Dentistry Unit, Faculty of Dentistry, University of Chile, Santiago, Chile; and postdoctoral fellow, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada. Diagnostic Challenge Published in collaboration with the American Academy of Oral and Maxillofacial Pathology and the American Academy of Oral Medicine Catherine M. Flaitz, DDS, MS, professor and chair, Division of Pediatric Dentistry, College of Dentistry, The Ohio State University, Columbus, OH; and chief of dentistry, Nationwide Children’s Hospital, Columbus, OH Michael A. Siegel, DDS, MS, FDS, RCSEd, professor and chair, Department of Diagnostic Sciences, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale-Davie, FL; and past president, American Academy of Oral Medicine JournalScan: Selections From the Current Literature Bruce L. Pihlstrom, DDS, MS, professor emeritus, Department of Surgical and Developmental Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN Nutrition Published in collaboration with the Nutrition Research Group of the International Association for Dental Research Riva Touger-Decker, PhD, RD, FADA, professor and chair, Department of Nutritional Sciences, Rutgers School of Health Related Professions, Newark, NJ; professor and director, Division of Nutrition, Rutgers School of Dental Medicine, Rutgers, The State University of New Jersey, Newark, NJ Pain Management Published in collaboration with the Neuroscience Group of the International Association for Dental Research Gary M. Heir, DMD, clinical professor and program and clinical director, Center for Temporomandibular Disorders and Orofacial Pain, Rutgers University School of Dental Medicine, Newark, NJ STATISTICAL EDITORS Al M. Best III, PhD, director of faculty research development; professor, Department of Periodontics, School of Dentistry; and professor, Department of Biostatistics, School of Medicine, Virginia Commonwealth University, Richmond, VA Barbara L. Greenberg, PhD, professor and chair, Department of Epidemiology and Community Health, School of Health Sciences and Practice, New York Medical College, Valhalla, NY SUBSCRIPTION INFORMATION Association members should address all inquiries to ussocieties@elsevier.com or (1-800-654-2452) or to Department of Membership, American Dental Association, msc@ada.org or 1-312-440-2614. Customer Service (orders, claims, online, change of address): Elsevier Periodicals Customer Service, 3251 Riverport Lane, Maryland Heights, MO 63043. 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Vol. 147, No. 10, pages 771-852. Member subscriptions: 1-312-440-2614 Nonmember subscriptions: 1-800-654-2452 Editorial content: 1-312-440-2791 Author Guidelines: jada.ada.org/content/authorinfo Manuscript submissions: 1-716-829-6413 ADA Headquarters: The central telephone number is 1-312-440-2500. The ADA’s toll-free telephone number can be found on your membership card. A8 JADA 147(10) http://jada.ada.org October 2016 EDITORIAL BOARD Mona Al-Sane, BChD, MS, assistant professor, Department of Developmental and Preventive Sciences, Faculty of Dentistry, Kuwait University, Kuwait City, Kuwait Stephen C. Bayne, PhD, MS, active professor emeritus, Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI Ana Bedran-Russo, DDS, MS, PhD, associate professor and program director, Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL Paul S. Casamassimo, DDS, MS, professor of pediatric dentistry, College of Dentistry, The Ohio State University, Columbus, OH Mark Donaldson, BSc (Pharm), PharmD, director, Performance Service, Vizient, Clinical Pharmacy, Whitefish, MT Dennis W. Engel, DDS, private practitioner, Mequon, WI A10 JADA 147(10) http://jada.ada.org October 2016 David C. Johnsen, MS, DDS, dean and professor of pediatric dentistry, College of Dentistry, University of Iowa, Iowa City, IA Mel L. Kantor, DDS, MPH, PhD, Oliver M. Ramsey endowed chair in health sciences and director, Institute for Health Sciences, University of Wisconsin-Eau Claire, Eau Claire, WI Kent D. Nash, PhD, economist and president, Nash & Associates, College Station, TX Terry G. O’Toole, DDS, director, Dental Informatics and Analytics, Veterans Health Administration Office of Dentistry, Department of Veterans Affairs, Washington, DC Christian Piers, DDS, MFA, immediate past president, American Student Dental Association, Chicago, IL; and resident in orthodontics, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC David C. Sarrett, DMD, MS, dean, School of Dentistry, and associate vice president for health sciences, faculty affairs, Virginia Commonwealth University, Richmond, VA INTERNATIONAL EDITORIAL BOARD A. Enrique Acosta Gío, DDS, PhD, professor of immunology and microbiology and head of infection control and occupational safety, School of Dentistry, National University of Mexico, Mexico City, Mexico William W.M. Cheung, DMD, continuing education programme manager, Asia Pacific Region, FDI World Dental Federation; honorary associate professor, Faculty of Dentistry, The University of Hong Kong; and private practitioner, Hong Kong Martin H. Hobdell, BDS, MA, PhD, visiting professor, Department of Epidemiology and Public Health, University College, London, England David M. Williams, BDS, MSc, PhD, FRCPath, FDSRCS, professor of Global Oral Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, England Tao Xu, DMD, PhD, professor, School and Hospital of Stomatology, Peking University, Beijing, China EDITORS OF JADA INTERNATIONAL EDITIONS INDIA PORTUGAL L. Krishna Prasad, MDS, dean, Sibar Institute of Dental Sciences, Guntur, India Paulo Melo, PhD, DDS, professor of operative dentistry, Faculty of Dentistry, University of Porto, Porto, Portugal MIDDLE EAST Joseph George Ghafari, DMD, professor, Department of Otolaryngology–Head & Neck Surgery, American University of Beirut Medical Center, Beirut, Lebanon INDUSTRY ADVISORY BOARD CHAIR Michael Glick, DMD, professor and William M. Feagans chair, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY INDUSTRY REPRESENTATIVES Chris Corsette, director of marketing, Septodont, Lancaster, PA Kathy M. Gaertner, director of U.S. marketing and business operations, 3M ESPE Division, St. Paul, MN Michael A. Gaglio, DDS, vice president, marketing, Ivoclar Vivadent, Amherst, NY Candy B. Ross, RDH, director of clinical affairs, ISI/DEXIS/Gendex Dental Systems, Marietta, GA Laura Woodruff, U.S. sales manager, SDI (North America), Bensenville, IL Jeff Zawada, PhD, director of technical research, A-dec, Newberg, OR The JADA Industry Advisory Board has no involvement in The Journal’s review and acceptance of manuscripts. That process is overseen by the Editor. A12 JADA 147(10) http://jada.ada.org October 2016 PUBLISHER AND SENIOR VICE PRESIDENT FOR BUSINESS AND PUBLISHING Michael D. Springer SENIOR DIRECTOR, EDITORIAL STRATEGY AND SERVICES Judy Jakush EDITORIAL DIRECTOR, DIGITAL CONTENT Stacie Crozier MANAGING EDITOR, JADA & SPECIAL PROJECTS Amy E. Lund CREATIVE DIRECTOR Peter Solarz EDITORIAL ASSISTANT Susan Lozinak LETTERS TO THE EDITOR Matt Carey SENIOR DIRECTOR OF ADVERTISING AND PRODUCTION SERVICES Gilbert X. 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A16 JADA 147(10) http://jada.ada.org October 2016 ASSOCIATION DIRECTORY ELECTED OFFICERS OF THE AMERICAN DENTAL ASSOCIATION Thirteenth District LINDSEY A. ROBINSON, DDS, 2018 National Dental Examinations (Joint Commission) Senior Vice President, Education and Professional Affairs LUIS J. FUJIMOTO, DMD, Chair DAVID M. WALDSCHMIDT, PhD ANTHONY J. ZIEBERT, DDS, MS President Grass Valley, CA robinsonl@ada.org CAROL GOMEZ SUMMERHAYS, DDS Fourteenth District San Diego, CA summerhaysc@ada.org DANIEL J. KLEMMEDSON, DDS, MD, 2019 Tucson, AZ klemmedsond@ada.org COMMITTEES GARY L. ROBERTS, DDS Fifteenth District American Dental Political Action Committee Shreveport, LA robertsg@ada.org RICHARD C. BLACK, DDS, MS, 2019 President-Elect First Vice President El Paso, TX blackr@ada.org BRUCE R. HUTCHINSON, DDS, Chair SARAH MILLIGAN 1111 14th St. N.W., Washington, DC 20005 Director ..................................... 1-202-898-2424 THOMAS W. GAMBA, DDS Sixteenth District Philadelphia, PA gambat@ada.org JULIAN HAL FAIR III, DMD, 2016 New Dentist Wagener, SC fairj@ada.org CHRISTOPHER M. HASTY, DDS, Chair TERA LAVICK, MS, MSIMC Second Vice President Speaker GLEN D. HALL, DDS Abilene, TX hallg@ada.org BOARD OF TRUSTEES First District JUDITH M. FISCH, DDS, 2019 Rutland, VT fischj@ada.org Second District CHAD P. GEHANI, DDS, 2018 Jackson Heights, NY gehanic@ada.org Third District ANDREW J. KWASNY, DMD, MSD, MPH, 2017 Fairview, PA kwasnya@ada.org Fourth District Dental Informatics ........................................................................ 2760 COUNCILS Executive Director/Chief Operating Officer Access, Prevention and Interprofessional Relations ........................................................................ 2700 Dental Society Outreach ..................................................... 1-800-232-1382 CESAR R. SABATES, DDS, Chair JANE S. GROVER, DDS Chief of Governance and Strategy Management Director ......................................................... 2751 JEROME K. BOWMAN, JD KATHLEEN T. O’LOUGHLIN, DMD, MPH ADA Sessions ........................................................................ 2877 JAMES H. VAN SICKLEN JR., DDS, Chair CATHERINE H. MILLS Vice President, Science Institute Director ......................................................... 2581 ........................................................................ 7450 Communications JOSHUA A. AUSTIN, DDS, Chair JANINE MACLACHLAN Director ......................................................... 2628 Dental Benefit Programs RONALD D. RIGGINS, DMD, Chair KRISHNA ARAVAMUDHAN, BDS, MS MARCELO W.B. ARAUJO, DDS, MS, PhD General Counsel ........................................................................ 2813 Vice President, Conferences and Continuing Education JAMES S. GOODMAN, CMP ........................................................................ 2891 Dental Education and Licensure Senior Vice President, Government and Public Affairs DANIEL J. GESEK, DMD, Chair KAREN M. HART, MA Wilmington, DE colej@ada.org Dental Practice ANDREW B. BROWN, DDS, Chair PAMELA M. POREMBSKI, DDS ALVIN W. STEVENS JR., DMD, MAEd, 2017 Director ......................................................... 7463 Birmingham, AL stevensa@ada.org Ethics, Bylaws and Judicial Affairs DOUGLAS A. AULD, DDS, Chair THOMAS C. ELLIOTT JR., JD MICHAEL GRAHAM, MPP 1111 14th St. N.W., Washington, DC 20005 ..................................................... 1-202-789-5161 Chief of People Management SABRINA A. KING, MBA ........................................................................ 2755 Chief Technology Officer TONI MARK, BS MARK R. ZUST, DDS, 2016 Director ......................................................... 2658 ........................................................................ 2921 St. Peters, MO zustm@ada.org Government Affairs Chief Communications Officer J. BARRY HOWELL, DDS, Chair THOMAS J. SPANGLER JR., JD STEPHANIE MORITZ, MA Seventh District JOSEPH P. CROWLEY, DDS, 2016 Director ..................................... 1-202-898-2400 Cincinnati, OH crowleyj@ada.org Members Insurance and Retirement Programs Eighth District PAUL R. MILLER, DDS, Chair RITA TIERNAN ........................................................................ 7739 Vice President, Practice Institute Health Policy Institute ........................................................................ 2568 Leadership Team Services ........................................................................ 2600 Library and Archives ........................................................................ 2653 Marketing ........................................................................ 2802 Media and Creative Services ........................................................................ 2803 Member Service Center ..................................................... 1-800-621-8099 Membership Information ........................................................................ 2607 Membership Marketing ........................................................................ 2864 Science/Professional Affairs ........................................................................ 2878 Standards Administration ........................................................................ 2506 State Government Affairs ........................................................................ 2525 Testing Services ........................................................................ 2676 DAVID M. PREBLE, DDS, JD, CAE ........................................................................ 2756 ADA BUSINESS ENTERPRISES INC. Managing Vice President WILLIAM J. ROBINSON, MBA ........................................................................ 4632 ROBERT N. BITTER, DMD, 2018 Senior Manager ........................................... 2491 Edwardville, IL bitterr@ada.org Membership Vice President, Member and Client Services K. DREW WILSON, DMD, Chair ANDREW REYNOLDS ........................................................................ 7455 Ninth District Government and Public Affairs ..................................................... 1-202-898-2400 J. CRAIG BUSEY, JD Director ......................................................... 2772 Director ......................................................... 2825 Sixth District Center for Continuing Education and Lifelong Learning ........................................................................ 2908 ASSOCIATION OFFICES JEFFREY M. COLE, DDS, MBA, 2017 Fifth District ADA.org ......................................................................... 2888 Tampa, FL buckenheimert@ada.org TERRY L. BUCKENHEIMER, DMD, 2016 Wickliffe, OH lemmor@ada.org ADA Catalog ..................................................... 1-800-947-4746 Conference Services and Meeting Planning ..................................................... 1-800-232-1432 Seventeenth District Miami, FL marrontarrazzii@ada.org RONALD P. LEMMO, DDS DEPARTMENT OFFICES Director ......................................................... 2386 IRENE MARRON-TARRAZZI, DMD Treasurer ........................................................................ 2712 Director ......................................................... 7465 DEBORAH DOHERTY GARY E. JEFFERS, DMD, MS, 2017 Senior Manager ........................................... 2808 Chief Financial Officer ADA FOUNDATION Northville, MI jeffersg@ada.org Scientific Affairs PAUL SHOLTY, BS, CPA Executive Director ELLIOT ABT, DDS, Chair JAMES M. LYZNICKI, MS, MPH ........................................................................ 2516 GENE WURTH Tenth District JAMES K. ZENK, DDS, 2016 Senior Manager ........................................... 2522 Montevideo, MN zenkj@ada.org Senior Vice President, Business and Publishing COMMISSIONS MICHAEL D. SPRINGER, BS Eleventh District Continuing Education Provider Recognition RICKLAND G. ASAI, DMD, 2018 PAUL LEARY, DMD, Chair MARY BORYSEWICZ Chief Economist and Vice President, Health Policy Institute Director ......................................................... 2704 MARKO VUJICIC, PhD Portland, OR asair@ada.org ........................................................................ 2790 ........................................................................ 7745 ........................................................................ 2819 Chief Financial Officer CYNTHIA FRONCZAK, CPA ..................................................... 1-312-587-4717 Dr. Anthony Volpe Research Center National Institute of Standards and Technology, Building 224, Room A153, Gaithersburg, MD 20899 Twelfth District Dental Accreditation RAYMOND A. COHLIMA, DDS, 2019 KAREN WEST, DMD, Chair SHERIN TOOKS, EdD, MS Senior Director, Practice Institute THOMAS C. HART, DDS, PhD JAMES L. WILLEY, DDS, MBA Director ......................................................... 2940 ........................................................................ 7456 Senior Director ..................................................... 1-301-975-6817 Oklahoma City, OK cohlimar@ada.org A18 JADA 147(10) http://jada.ada.org October 2016