Jcdajournal of the Canadian Dental Association
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JCDAJournal of the Canadian Dental Association Vol. 70, No. 1 January 2004 Painting by Dr. Jack Sherman Implant Imaging Protocols Third Molars and Mandibular Angle Fractures Weight of Dental Amalgam Restorations Ferric Sulfate Pulpotomy in Primary Incisors Identifying the Titanic’s ‘Unknown Child’ Canada’s Peer-Reviewed Dental Journal • www.cda-adc.ca/jcda • Next Program Starts Feb. 12, 2004 JCDAJournal of the Canadian Dental Association CDA Executive Director George Weber Editor-In-Chief Mission statement Dr. John P. O’Keefe Senior Writer/Editor CDA is the authoritative national voice of dentistry, dedicated to the Harvey Chartrand representation and advancement of the profession, nationally and Assistant Editor internationally, and to the achievement of optimal oral health. Natalie Blais Coordinator, French Translation Nathalie Upton Coordinator, Publications Rachel Galipeau Editorial consultants Writer, Electronic Media Dr. Catalena Birek Dr. James L. Leake Melany Hall Manager, Design & Production Dr. Jeff Coil Dr. William H. Liebenberg Barry Sabourin Dr. Pierre C. Desautels Dr. Kevin E. Lung Graphic Designer Dr. Terry Donovan Janet Cadeau-Simpson Dr. Debora C. Matthews Associate Editors Dr. Robert Dorion Dr. Alan R. Milnes Dr. Michael J. Casas Dr. Robert V. Elia Dr. Anne Charbonneau Dr. David S. Precious Dr. Joel B. Epstein Dr. Mary E. McNally Dr. Richard B. Price Dr. Sebastian Saba Dr. Kenneth E. Glover Dr. N. Dorin Ruse All statements of opinion and supposed fact Dr. Daniel Haas are published on the authority of the author Dr. George K.B. Sàndor who submits them and do not necessarily Dr. Robert J. Hawkins express the views of the Canadian Dental Dr. Benoit Soucy Association. The editor reserves the right to Dr. Claude Ibbott edit all copy submitted to the Journal. Publica- Dr. Gordon W. Thompson tion of an advertisement does not necessarily Dr. Aleksandra Jokovic imply that the Canadian Dental Association Dr. Asbjørn Jokstad Dr. Robert S. Turnbull agrees with or supports the claims therein. The Journal of the Canadian Dental Associa- Dr. Richard Komorowski Dr. David W. Tyler tion is published in both official languages — except scientific articles which are Dr. Ernest W. Lam Dr. Peter T. Williams published in the language in which they are received. Readers may request the Journal in the language of their choice. The Journal of the Canadian Dental Association is published 11 times per year CDA Board of Directors (July-August combined) by the Canadian Dental Association at 1815 Alta Vista Drive, Ottawa, ON K1G 3Y6. Copyright 1982 by the President Dr. Gordon Johnson Canadian Dental Association. Authorized as Dr. Louis Dubé North Battleford, Saskatchewan Publications Mail Registration No. 40064661. Sherbrooke, Quebec Postage paid at Ottawa, Ont. Subscriptions Dr. Robert MacGregor are for 11 issues, conforming with the calen- President-Elect Kentville, Nova Scotia dar year. All 2004 subscriptions are payable in Dr. Alfred Dean advance in Canadian funds. In Canada — Dr. Wayne Pulver $71.96 (+ GST); United States — $105; all Sydney, Nova Scotia other — $130. Notice of change of address Willowdale, Ontario should be received before the 10th of the Vice-President month to become effective the following Dr. Jack Cottrell Dr. Jack Scott month. Member: American Association of Port Perry, Ontario Edmonton, Alberta Dental Editors and Canadian Circulations Audit Board • Call CDA for information and Dr. Michael Connolly Dr. Robert Sexton assistance toll-free (Canada) at: 1-800-267-6354 Corner Brook, Newfoundland and Labrador • Outside Canada: (613) 523-1770 • CDA Charlottetown, Prince Edward Island Fax: (613) 523-7736 • CDA E-mail: reception@ cda-adc.ca • Web site: www.cda-adc.ca Dr. Craig Fedorowich Dr. Darryl Smith Hamiota, Manitoba Valleyview, Alberta ISSN 0709 8936 Printed in Canada Dr. Wayne Halstrom Dr. Deborah Stymiest Vancouver, British Columbia Fredericton, New Brunswick Journal of the Canadian Dental Association January 2004, Vol. 70, No. 1 3 One cement that can take you just about anywhere. We just made the road a lot smoother and easier for you. With RelyX Unicem self-adhesive universal resin cement, there’s no need to stock a number of different permanent cements because RelyX Unicem does virtually everything. Proven successful in clinical tests, it’s ideal for all metal and non-metal restorations with the exception of veneers. It’s self-adhesive, so it requires less time and effort – with no need for separate priming, etching or bonding steps. So turn to the cement that’s universally strong and reliable – RelyX Unicem self-adhesive universal resin cement. Easy to choose. Easy to use. To order, contact your 3M ESPE authorized distributor. For additional information, call 1-800-265-1840 ext. 6229 or visit us at www.3MESPE.com/canada. 3M, ESPE and RelyX are trademarks of 3M or 3M ESPE A.G. Used under license in Canada. © 2004, 3M ESPE. All rights reserved. 0312-MG-18707 CONTENTS Journal of the Canadian Dental Association D EPARTMENTS S PECIAL F EATURE The Titanic Disaster: Dentistry’s Role Editorial . 7 in the Identification of an ‘Unknown Child’ . 24 President’s Column . 9 Keith C. Titley, BDS, MScD, FRCD(C) Bruce R. Pynn, MSc, DDS, FRCD(C) A Salute to Our Reviewers . 11 Robert Chernecky John T. Mayhall, DDS, PhD Letters . 12 Gajanan V. Kulkarni, BDS, PhD, FRCD(C) Alan Ruffman, P Geo Advertisers’ Index . 13 News . 15 P ROFESSIONAL I SSUES FDI Statements . 20 Estimating the Weight of Dental Amalgam Restorations . 30 Diagnostic Challenge . 44 Albert O. Adegbembo, BDS, DDPH, MSc, FRCD(C) Philip A. Watson, DDS, MScD Point of Care . 48 Shanin Rokni, DDS Clinical Showcase. 53 CDSPI Reports . 58 C LINICAL P RACTICE New Products . 62 Implant Imaging for the Dentist . 32 Muralidhar Mupparapu, DMD Classified Ads . 63 Steven R. Singer, DDS A PPLIED R ESEARCH All matters pertaining to the Journal should be directed to: Editor-in-chief, Journal of the Outcomes of Vital Primary Incisor Ferric Sulfate Canadian Dental Association, 1815 Alta Vista Pulpotomy and Root Canal Therapy . 34 Drive, Ottawa, ON, K1G 3Y6. E-mail: Michael J. Casas, DDS, MSc, FRCD(C) [email protected]. David J. Kenny, BSc, DDS, PhD, FRCD(C) • Toll-free: 1-800-267-6354 • Douglas H. Johnston, BSc, DDS, MSc, FRCD(C) • Tel.: (613) 523-1770 • Peter L. Judd, BSc, DDS, MSc, FRCD(C) • Fax: (613) 523-7736 • Michael A. Layug, BSc, DDS, FRCD(C) All matters pertaining to classified advertising The Association of Third Molars with should be directed to: Ms. Beverley Kirk- patrick c/o Canadian Medical Association, Mandibular Angle Fractures: A Meta-Analysis . 39 1867 Alta Vista Dr., Ottawa, ON K1G 3Y6 Beate P. Hanson, MD, MPH • Toll-free: 1-800-663-7336 , ext. 2127 • Peter Cummings, MD, MPH • Tel.: (613) 731-9331• Frederick P. Rivara, MD, MPH • Fax: (613) 565-7488 • Mike T. John, DDS, MPH, PhD All matters pertaining to display advertising should be directed to: Ms. Marg Churchill c/o Keith Health Care Inc., 104-1599 Hurontario St., Mississauga, ON L5G 4S1 • Toll-free: 1-800-661-5004 • An independent review* has concluded that oscillating- • Tel.: (905) 278-6700 • rotating technology, pioneered by Oral-B, is the most • Fax: (905) 278-4850 • effective at reducing plaque and gingivitis. *For more information, and to read the published abstract, visit the Cochrane Collaboration website at Publication of an advertisement does not www.update-software.com/toothbrush. necessarily imply that the Canadian Dental Association agrees with or supports the claims therein. Please see our advertisement opposite the Editorial page. Journal of the Canadian Dental Association January 2004, Vol. 70, No. 1 5 What do you do when an independent review concludes you have the most effective power technology? Make it better. More oscillations per minute for exceptional sensory feeling New Professional Timer signals every 30 seconds to encourage thorough cleaning New charging indicator light blinks until fully charged Introducing the Oral-B ProfessionalCare™ 7000 Series. Proven technology. Upgraded design. A new look. A new feel. And a whole new name. The Oral-B ProfessionalCare™ 7000 Series is the exciting new updated, upgraded version of our flagship power toothbrush, the 3D Excel. It features the rotating oscillating action cited by an independent review as more effective at reducing plaque and gingivitis than manual or “sonic” brushing.1 And, it’s the best power toothbrush we make. So far. Call 1 800 268-5217 for more information. 1 Heanue et al. Manual versus powered toothbrushing for oral health (Cochrane Review). In: The Cochrane Library, Issue 1, 2003, Oxford: Update Software. Full report online at www.update-software.com/toothbrush. BRAA32111 © 2003 Oral-B Laboratories Editorial commitment of the profession to On my most recent visit, support dental education that each Dr. Woronuk and his colleague dentist registered in Alberta pays a Yvonne Pinchbeck took me to visit COMING part of his or her licence fee each year the University of Alberta Satellite towards endowments to support the Outreach Clinics in northern Alberta, IN FROM dental school. where dental and dental hygiene At an anniversary dinner, the dean students spend time providing care THE COLD of the faculty of medicine and to patients in underserved commu- dentistry, Dr. Lorne Tyrrell, assured nities. I believe the university can be the audience that the future of the very proud of the excellent learning Alberta dental school is in good opportunity that these clinics provide hands. (Dr. Tyrrell is stepping down at for their students and the quality of care received by the residents of these the end of this academic year.) He northern communities. The patients noted that one of the criteria for I met at those clinics told me they selecting the next dean of the faculty were very happy with the service they will be a commitment to keep dental received.