about the publisher _ imprint roots the international C.E. magazine of endodontics Group Editor Kristine Colker k.colker@dental-tribune.com Product/Account Manager Humberto Estrada h.estrada@dental-tribune.com U.S. Headquarters Tribune America 118-35QueensBlvd,Ste400 ForestHills,NY11375 Tel.: (212) 244-7181 Fax:(212)244-7185 feedback@dental-tribune.com www.dental-tribune.com Roots Managing Editor Fred Michmershuizen f.michmershuizen @dental-tribune.com Product/Account Manager Maria Kaiser m.kaiser@dental-tribune.com Feedback & General Inquiries feedback@dental-tribune.com Publisher TorstenR.Oemus t.oemus@dental-tribune.com Client Relations Coordinator Leerol Colquhoun l.colquhoun@dental-tribune.com President/ Chief Executive Officer EricSeid e.seid@dental-tribune.com Accounting Coordinator Nirmala Singh n.singh@dtstudyclub.com Tribune America is the official media partner of: roots_Copyright Regulations Editorial Board MarciaMartinsMarques,Leonardo Silberman,EminaIbrahimi,IgorCernavin, DanielHeysselaer,RoelanddeMoor,Julia Kamenova, T. Dostalova, Christliebe Pasini, PeterSteenHansen,AishaSultan,Ahmed AHassan,MaritaLuomanen,PatrickMaher, Marie France Bertrand, Frederic Gaultier, AntonisKallis,DimitrisStrakas,KennethLuk, MukulJain,RezaFekrazad,Sharonit Sahar-Helft,LajosGaspar,PaoloVescovi, MarinaVitale,CarloFornaini,KenjiYoshida, HideakiSuda,Ki-SukKim,LiangLingSeow, ShaymantSinghMakhan,EnriqueTrevino, Ahmed Kabir, Blanca de Grande, José Correia deCampos,CarmenTodea,SalehGhabban StephenHsu,AntoniEspanaTost,Josep Arnabat, Ahmed Abdullah, Boris Gaspirc, PeterFahlstedt,ClaesLarsson,MichelVock, Hsin-ChengLiu,SajeeSattayut,FerdaTasar, SevilGurgan,CemSener,ChristopherMercer, Valentin Preve, Ali Obeidi, Anna-Maria Yannikou,SuchetanPradhan,RyanSeto,Joyce Fong, Ingmar Ingenegeren, Peter Kleemann, Iris Brader, Masoud Mojahedi, Gerd Volland, GabrieleSchindler,RalfBorchers,Stefan Grümer,JoachimSchiffer,DetlefKlotz, HerbertDeppe,FriedrichLampert,Jörg Meister,ReneFranzen,AndreasBraun,Sabine Sennhenn-Kirchner,SiegfriedJänicke,Olaf Oberhofer and Thorsten Kleinert _the international C.E. magazine of roots published by Tribune America is printed quarterly. The magazine’s articles and illustrations are protected by copyright. Reprintsofanykind,includingdigitalmediums, without the prior consent of the publisher are inadmissible and liable to prosecution. This also appliestoduplicatecopies,translations,microfilmsandstorageandprocessinginelectronicsystems.Reproductions, includingexcerpts, may only be made with the permission of the publisher. All submissions to the editorial department are understood to be the original work of the author, meaning that he or she is the sole copyright holder and no other individual(s) or publisher(s) holds the copyright to the material. The editorial department reserves the right to review all editorial submissions for factual errors and to make amendments if necessary. Tribune America does not accept the submission of unsolicited books and manuscripts in printed or electronic form and such items will be disposed of unread should they be received. TribuneAmericastrivestomaintaintheutmostaccuracyinitsclinicalarticles.Ifyoufindafactualerrororcontentthatrequiresclarifi- cation, please contact Group Editor Kristine Colker at k.colker@dental-tribune.com. Opinionsexpressedbyauthorsaretheirownandmay not reflect those of Tribune America and its employees. Tribune America cannot assume responsibility for the validity of product claims or for typographical errors. The publisher also does not assume responsibility for product names or statements made by advertisers. The responsibilityforadvertisementsandotherspeciallylabeleditemsshallnotbebornebytheeditorialdepartment.Likewise,norespon- sibility shall be assumed for information published about associations, companies and commercial markets. Allcasesofconsequentialliability arisingfrominaccurateorfaultyrepresentationareexcluded.Generaltermsandconditionsapply,and the legalvenueisNewYork,NewYork. 14 I roots 1_ 2020