Heat Release, Time Required, and Cleaning Ability of Mtwo R and ProTaper Universal Retreatment Systems in the Removal of Filling Material
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
19/10/2012
19/10/2012
2010
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Resumo |
Introduction: This ex vivo study evaluated the heat release, time required, and cleaning efficacy of MTwo (VDW, Munich, Germany) and ProTaper Universal Retreatment systems (Dentsply/Maillefer, Ballaigues, Switzerland) and hand instrumentation in the removal of filling material. Methods: Sixty single-rooted human teeth with a single straight canal were obturated with gutta-percha and zinc oxide and eugenol-based cement and randomly allocated to 3 groups (n = 20). After 30-day storage at 37 degrees C and 100% humidity, the root fillings were removed using ProTaper UR, MTwo R, or hand files. Heat release, time required, and cleaning efficacy data were analyzed statistically (analysis of variance and the Tukey test, alpha = 0.05). Results: None of the techniques removed the root fillings completely. Filling material removal with ProTaper UR was faster but caused more heat release. Mtwo R produced less heat release than the other techniques but was the least efficient in removing gutta-percha/sealer. Conclusions: ProTaper UR and MTwo R caused the greatest and lowest temperature increase on root surface, respectively; regardless of the type of instrument, more heat was released in the cervical third. Pro Taper UR needed less time to remove fillings than MTwo R. All techniques left filling debris in the root canals. (I Endod 2010;36:1870-1873) |
Identificador |
JOURNAL OF ENDODONTICS, v.36, n.11, p.1870-1873, 2010 0099-2399 http://producao.usp.br/handle/BDPI/25911 10.1016/j.joen.2010.08.013 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE INC |
Relação |
Journal of Endodontics |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE INC |
Palavras-Chave | #Endodontic retreatment #gutta-percha removal #Mtwo Retreatment #ProTaper Universal Retreatment #ROOT-CANAL RETREATMENT #GUTTA-PERCHA REMOVAL #ROTARY NITI INSTRUMENTS #POST SPACE PREPARATION #ENDODONTIC RETREATMENT #EX-VIVO #EFFICACY #SURFACE #FILES #HAND #Dentistry, Oral Surgery & Medicine |
Tipo |
article original article publishedVersion |