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Irrigation dynamics associated with positive pressure, apical negative pressure and passive ultrasonic irrigations: A computational fluid dynamics analysis
Author(s) -
Chen José Enrique,
Nurbakhsh Babak,
Layton Gillian,
Bussmann Markus,
Kishen Anil
Publication year - 2014
Publication title -
australian endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.703
H-Index - 34
eISSN - 1747-4477
pISSN - 1329-1947
DOI - 10.1111/aej.12027
Subject(s) - root canal , irrigation , shear stress , materials science , stress (linguistics) , ultrasonic sensor , geotechnical engineering , dentistry , biomedical engineering , medicine , composite material , geology , biology , agronomy , linguistics , philosophy , radiology
Complexities in root canal anatomy and surface adherent biofilm structures remain as challenges in endodontic disinfection. The ability of an irrigant to penetrate into the apical region of a canal, along with its interaction with the root canal walls, will aid in endodontic disinfection. The aim of this study was to qualitatively examine the irrigation dynamics of syringe irrigation with different needle tip designs (open‐ended and closed‐ended), apical negative pressure irrigation with the EndoVac ® system, and passive ultrasonic‐assisted irrigation, using a computational fluid dynamics model. Syringe‐based irrigation with a side‐vented needle showed a higher wall shear stress than the open‐ended but was localised to a small region of the canal wall. The apical negative pressure mode of irrigation generated the lowest wall shear stress, while the passive‐ultrasonic irrigation group showed the highest wall shear stress along with the greatest magnitude of velocity.