The “balanced force” concept for instrumentation of curved canals

Canal curvature has always introduced complexity into canal preparation. The “balanced force concept,” developed by trial and error experimentation over the past 12 yr, is proposed as a means of overcoming the curvature influence. Its concepts use force magnitudes in order to create control over und...

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Veröffentlicht in:Journal of endodontics 1985-05, Vol.11 (5), p.203-211
Hauptverfasser: Roane, James B., Sabala, Clyde L., Duncanson, Manville G.
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container_end_page 211
container_issue 5
container_start_page 203
container_title Journal of endodontics
container_volume 11
creator Roane, James B.
Sabala, Clyde L.
Duncanson, Manville G.
description Canal curvature has always introduced complexity into canal preparation. The “balanced force concept,” developed by trial and error experimentation over the past 12 yr, is proposed as a means of overcoming the curvature influence. Its concepts use force magnitudes in order to create control over undesirable cutting associated with canal curvature. Rotation is promoted as the means for maintaining magnitude as a control and counterclockwise direction of rotation provides finite operator control. Diagrammatic evaluations, mathematical calculations, bending moments, test canals, sectioned teeth, and clinical radiographs are presented to document each step of the concept. The concept comes to fruition with the introduction of a new K-type file design. La curvatura del conducto siempre representó una complejidad en la preparación del mismo. El concepto de “fuerza balanceada” desarrollado a través de experimentación por ensayo y error durante los útimos 12 años, se propone como un medio de superar la influencia de la curvatura. Sus conceptos usan magnitudes de fuerza a fin de lograr el control del corte indeseable asociado con la curvatura del conducto. Se promueve la rotación como medio de mantener la magnitud como control, y la dirección de rotación en sentido contrario a las agujas del reloj permite un definido control al operador. Se presentan evaluaciones diagramáticas, cálculos matemáticos, momentos de torsión, pruebas de conductos, dientes seccionados y radiografías clínicas para documentar cada paso del concepto, que se ve completado con la introducción de un nuevo diseño de limas tipo K.
doi_str_mv 10.1016/S0099-2399(85)80061-3
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Dental Pulp Cavity - anatomy & histology
Dentistry
Humans
Root Canal Therapy - instrumentation
Root Canal Therapy - methods
Stress, Mechanical
title The “balanced force” concept for instrumentation of curved canals
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