The American Journal of Publisher H. W. Haase Executive Vice President DENTISTRY William G. Hartman Director, Journal Publications ISSN 2162-2833 (print) ISSN 2162-2841 (online) Editor-in-Chief Richard J. Simonsen, DDS, MS Professor and Dean, College of Dentistry Executive Director, University Dental Hospital University of Sharjah Sharjah, United Arab Emirates richardjsimonsen@gmail.com Editorial Board Luiz Narciso Baratieri, DDS, MSD, PhD Joel H. Berg, DDS, MS Markus B. Blatz, DMD, PhD Jeff Brucia, DDS John R. Calamia, DMD Alexander Carroll, DDS, MBA David Chambers, EdM, MBA, PhD Gordon J. Christensen, DDS, MSD, PhD Theodore P. Croll, DDS Alessandro Devigus, Dr Med Dent Sillas Duarte Jr, DDS, MS, PhD Newton Fahl Jr, DDS, MS Jack L. Ferracane, PhD Ronald E. Goldstein, DDS Laura C. Kottemann, DMD Gerard Kugel, DMD, MS, PhD Tyler P. Lasseigne, DDS, CDT Pascal Magne, Dr Med Dent, PhD Tidu Mankoo, BDS Assad F. Mora, DDS, MSD Marc L. Nevins, DMD, MMSc Vijay Parashar, DDS, MS Ariel J. Raigrodski, DMD, MS André V. Ritter, DDS, MS Richard D. Roblee, DDS, MS David D. Rolf II, DMD, MS Lori A. Bateman Production Manager Diane J. Curran Editorial, Advertising, and Subscriptions Quintessence Publishing Co, Inc 4350 Chandler Drive, Hanover Park, IL 60133 Tel: (630) 736-3600. Fax: (630) 736-3633 Toll-free (US/Canada): (800) 621-0387 Advertising Email: splinski@quintbook.com Subsription Email: mhartman@quintbook.com Web site: www.quintpub.com Subscription rates (includes online version): Regular rate for North America is $188; $330 institutional. International rate (outside North America) is $218 regular; $360 institutional. International subscribers add $30 to international rate for air mail. Special student rate is $110 ($140 international); verification of student status required on submission of subscription order. AJED is published quarterly by Quintessence Publishing Co, Inc. Postmaster: Send address changes to Quintessence Publishing Co, Inc, 4350 Chandler Drive, Hanover Park, IL 60133, USA. Copyright © 2013 by Quintessence Publishing Co, Inc. All rights reserved. Printed in USA. No part of this journal may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information and retrieval system, without permission in writing from the publisher. The publisher and editors assume no responsibility for unsolicited manuscripts. The views expressed herein are those of the individual authors and are not necessarily those of the publisher. Information included herein is not professional advice and is not intended to replace the judgment of a practitioner with respect to particular patients, procedures, or practices. To the extent permissible under applicable laws, the publisher disclaims responsibility for any injury and/or damage to persons or property as a result of any actual or alleged libelous statements, infringement of intellectual property or other proprietary or privacy rights, or from the use or operation of any ideas, instructions, procedures, products, or methods contained in the material herein. Permission to photocopy items solely for internal or personal use, and for the internal and personal use of specific clients, is granted by Quintessence Publishing Co, Inc, for libraries and other users registered with the Copyright Clearance Center (CCC) Transaction Reporting Service, provided that the base fee of $5 per article plus $.10 per page is paid directly to CCC, 222 Rosewood Drive, Danvers, MA 01923 (www. copyright.com). Identify this publication by including the fee code: 2162-2833/13 $5 + $.10. Gwenlynn Werner, DMD Advertising Policy: All advertising appearing in AJED must be approved by the editorial staff. The publication of an advertisement is not to be construed as an endorsement or approval by the journal or its publisher of the quantity or value of the advertised products or services or of any of the representations or claims made by the advertisers. David Winkler, DDS Printed in USA. Leo E. Rouse, DDS Frank Spear, DDS, MSD Douglas A. Terry, DDS