Your browser doesn't support javascript.
loading
Change of working length in curved canals by various instrumentation techniques / 대한치과보존학회지
Journal of Korean Academy of Conservative Dentistry ; : 30-35, 2006.
Article Dans Anglais | WPRIM | ID: wpr-214344
ABSTRACT
To evaluate the change of working length with various instrumentation techniques in curved canals, working length and canal curvature were determined before and after canal instrumentation in buccal or mesial canals of extracted human molars. Stainless steel K-files (MANI(R), Matsutani Seisakusho Co. Takanezawa, Japan), nickel-titanium K-files (Naviflex NT(TM), Brassler, Savannah, USA), ProFile(R), and ProTaper(TM) (Dentsply-Maillefer, Ballaigues, Switzerland) were used to prepare the canals with crown-down technique. In two hand instrumentation groups, coronal flaring was made with Gates Glidden burs. Apical canals were instrumented until apical diameter had attained a size of 30. Positional relation between the tooth apex and the #10 K-file tip was examined by using AutoCAD 2000 (Autodesk Corp., San Rafael. CA, USA) under a stereomicroscope before and after coronal flaring, and after apical instrumentation. Degree of canal curvature was also measured with Schneider's method in radiographs. Data of working length and canal curvature changes were statistically analyzed with one-way ANOVA and Tukey's studentized range test. Working length and canal curvature were decreased significantly in each step in all instrumentation groups. Coronal flaring using Gates Glidden burs in hand instrument groups and whole canal instrumentation using stainless steel hand K-files caused significantly more working length change than in ProFile instrumentation group (p < 0.05). The result of this study demonstrates that all of the above kinds of instrumentation in curved canals cause reduction of working length and canal curvature at each instrumentation steps, and hand instrumentation causes more working length change than ProFile.
Sujets)

Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Acier inoxydable / Apex de la racine de la dent / Instruments dentaires / Main / Molaire Limites du sujet: Humains langue: Anglais Texte intégral: Journal of Korean Academy of Conservative Dentistry Année: 2006 Type: Article

Documents relatifs à ce sujet

MEDLINE

...
LILACS

LIS

Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Acier inoxydable / Apex de la racine de la dent / Instruments dentaires / Main / Molaire Limites du sujet: Humains langue: Anglais Texte intégral: Journal of Korean Academy of Conservative Dentistry Année: 2006 Type: Article