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ePaper created 2017-04-19, 21:15:41 | version 1.38.0
laser_case report Er,Cr:YSGG laser and Internal Root Resorptions Case report of an endodontic treatment using radial fi ring fi ps Authors: Dr Miguel Rodrigues Martins, Prof. Dr Manuel Fontes Carvalho, Prof. Dr Irene Pina-Vaz, Prof. Dr Miguel André Martins & Prof. Dr Norbert Gutknecht, Portugal/Germany Introduction Endodontic therapy is the treatment of choice for teeth with apical periodontitis and Internal Root Re- sorptions (IRR) as it aims to eliminate bacterial con- tamination, granulation tissue and blood supply of the clastic cells that are commonly reported to be in- volved with the process.1, 2 © Annareichel/Shutterstock.com Sodium hypochlorite (NaOCl) is arguably chosen as primary endodontic disinfection solution. Neverthe- less, the ideal concentration, temperature, contact period and extent of clinical effectiveness of NaOCl remains under discussion.3–6 Moreover, several clini- cal factors (e.g. root perforations, absence of apical constriction etc.) may accidently induce NaOCl extru- sion into periapical tissues with potentially severe and hazardous consequences.7–9 In spite of this, several clinical strategies were re- ported with regards to the management of root re- sorptions,10 their scientifi c evidence is limited to case reports and few present alternative disinfection techniques.11–14 Lasers have long been presented as promising alternatives to conventional endodontic procedures.15 Each laser wavelength has a specifi c absorption coeffi cient for every tissue16 and erbium lasers demonstrate a high absorption coeffi cient for both water/aqueous solutions and hydroxyapa- tite.17, 18 Thus, the rationale for using erbium lasers in endodontics may be briefl y described as: (1) the abil- ity of infrared light to interact with aqueous solu- tions and produce cavitation effects capable to remove smear layer, dentinal debris and fi lling mate- rials from the root canal walls19–21 and (2) the ability of infrared light to propagate into the dentinal tubules, achieving signifi cant bactericidal effects deeper than conventional chemical solutions.22, 23 Accordingly, the 2,780 nm Er,Cr:YSGG laser has been reported as an effective method for smear layer 34 1_2017 34 laser