| international imprint Imprint International Administration Publisher/President/CEO Torsten R. Oemus t.oemus@dental-tribune.com Director Content Creation Claudia Duschek Managing Editor Magda Wojtkiewicz m.wojtkiewicz@dental-tribune.com Designer Franziska Schmid Copy Editors Sabrina Raaff, Ann-Katrin Paulick Editorial Board Fernando Goldberg, Argentina Markus Haapasalo, Canada Clemens Bargholz, Germany Michael Baumann, Germany Benjamin Briseno, Germany Heike Steffen, Germany Gary Cheung, Hong Kong Asgeir Sigurdsson, Iceland Adam Stabholz, Israel Jorge Vera, Mexico Unni Endal, Norway Esteban Brau, Spain José Pumarola, Spain Kishor Gulabivala, United Kingdom William P. Saunders, United Kingdom Fred Barnett, USA L. Stephan Buchanan, USA James Gutmann, USA Ben Johnson, USA Kenneth Koch, USA Sergio Kuttler, USA John Nusstein, USA Ove Peters, USA Chief Financial Officer Dan Wunderlich Chief Technology Officer Serban Veres Junior Business Development & Marketing Alyson Buchenau Digital Production Manager Tom Carvalho Junior Digital Production Manager Hannes Kuschick E-Learning Manager Lars Hoffmann Education Director Tribune CME Christiane Ferret Product Manager CME Sarah Schubert Sales & Production Support Madleen Zoch Puja Daya Accounting Services Karen Hamatschek Manuela Hunger Media Sales Managers Antje Kahnt (International) Barbora Solarova (Eastern Europe) Hélène Carpentier (Western Europe) Matthias Diessner (Key Accounts) Melissa Brown (International) Peter Witteczek (Asia Pacific) Weridiana Mageswki (Latin America) Executive Producer Gernot Meyer Advertising Disposition Marius Mezger International Offices Dental Tribune International Holbeinstr. 29, 04229 Leipzig, Germany Tel.: +49 341 48474-302 Fax: +49 341 48474-173 info@dental-tribune.com www.dental-tribune.com Dental Tribune Asia Pacific Ltd. c/o Yonto Risio Communications Ltd. Room 1406, Rightful Centre 12 Tak Hing Street, Jordan, Kowloon, Hong Kong Tel.: +852 3113 6177 Fax: +852 3113 6199 Tribune America, LLC 116 West 23rd Street, Ste. 500, New York, NY 10011, USA Tel.: +1 212 244 7181 Fax: +1 212 244 7185 Printed by Löhnert Druck Handelsstraße 12 04420 Markranstädt Germany Copyright Regulations roots international magazine of endodontics is published by Dental Tribune International (DTI) and appears in 2018 with four issues. The magazine and all articles and illustrations therein are protected by copyright. Any utilisation without the prior consent of editor and publisher is inadmissible and liable to prosecution. This applies in particular to duplicate copies, translations, microfilms, and storage and processing in electronic systems. Reproductions, including extracts, may only be made with the permission of the publisher. Given no statement to the contrary, any submissions to the editorial department are understood to be in agreement with a full or partial publishing of said submission. The editorial department reserves the right to check all submitted articles for formal errors and factual authority, and to make amendments if necessary. No responsibility shall be taken for unsolicited books and manuscripts. Articles bearing symbols other than that of the editorial department, or which are distinguished by the name of the author, represent the opinion of the aforementioned, and do not have to comply with the views of DTI. Responsibility for such articles shall be borne by the author. Responsibility for advertisements and other specially labeled items shall not be borne by the editorial department. Likewise, no responsibility shall be assumed for information published about associations, companies and commercial markets. All cases of consequential liability arising from inaccurate or faulty representation are excluded. General terms and conditions apply. Legal venue is Leipzig, Germany. 50 roots 3 2018