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Shape of the root canal after ultrasonic instrumentation with K‐Flex files
Author(s) -
Ahmad Majinah
Publication year - 1990
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1990.tb00402.x
Subject(s) - flex , coronal plane , ultrasonic sensor , displacement (psychology) , instrumentation (computer programming) , root canal , amplitude , materials science , biomedical engineering , orthodontics , acoustics , computer science , physics , anatomy , engineering , medicine , optics , telecommunications , operating system , psychology , psychotherapist
This study investigated the feasibility of using K‐Flex files with the Cavi‐Endo ultrasonic unit. The effectiveness of the K‐Flex files in shaping canals was compared with the ultrasonic Cavi‐Endo K‐files. Simulated curved canals in clear resin blocks were instrumented ultrasonically using the 2 file types. Pre‐ and postinstrumentation photographs were taken and the following were evaluated: apical and coronal areas, the incidence of the narrowing of the canals coronal to the apical transport (elbows). Displacement amplitude measurements were carried out in order to see any relationship between the incidence of elbows and displacement amplitudes of the files. The results indicated that the K‐Flex files were more efficient than the ultrasonic K‐files and resulted in less elbow formation. No direct relationship was observed between displacement amplitudes and the incidence of elbow formation. It is suggested that the manufacturers of ultrasonic units consider different file designs.