The Influence of Canal Curvature on the Mechanical Efficacy of Root Canal Irrigation In Vitro Using Real-Time Imaging of Bioluminescent Bacteria

Nguy, Donald; Sedgley, Christine M.

doi:10.1016/j.joen.2006.04.011

Cited by 46 publications

(38 citation statements)

References 30 publications

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“…In a microbiological study, the decreased effectiveness of PP in curved canals was demonstrated using bioluminescent bacteria (46). This study presented very relevant data concerning the physical limitations of the efficacy of needle irrigation.…”

Section: "Vapor Lock" Phenomenonmentioning

confidence: 79%

“…The degree of root canal curvatures directly affects the penetration of the irrigation needle and consequently restricts the irrigant flow at the apical portion. The number of studies analyzing the efficacy of irrigation in curved canals is limited (45)(46)(47). The presence of slight curvatures, starting from 25 ∘ , represents a clinical challenge (48).…”

Section: "Vapor Lock" Phenomenonmentioning

confidence: 99%

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Positive Pressure Irrigation

Gregorio

Heilborn

Cohenca

2014

Disinfection of Root Canal Systems

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Section: "Vapor Lock" Phenomenonmentioning

confidence: 79%

Section: "Vapor Lock" Phenomenonmentioning

confidence: 99%

Positive Pressure Irrigation

Gregorio

Heilborn

Cohenca

2014

Disinfection of Root Canal Systems

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“…The effect of root canal curvature on irrigant exchange has been studied indirectly by Nguy and Sedgley [ 69 ], who evaluated the removal of bioluminescent planktonic bacteria. Based on their results, a curvature up to 24°-28° according to Schneider's method [ 89 ] doesn't seem to create additional obstacles for irrigant fl ow even when a low fl ow rate is used, provided that a closed-ended needle is placed at 1 mm short of WL [ 69 ]. It can be assumed that if needles are positioned within 1-3 mm short of WL in a curved root canal, in many cases they have already bypassed most of the curvature and the remaining curvature apically to their tip is limited.…”

Section: Irrigant Refreshmentmentioning

confidence: 99%

Syringe Irrigation: Blending Endodontics and Fluid Dynamics

Boutsioukis

Sluis

2015

Endodontic Irrigation

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Syringe irrigation remains a widely used irrigant delivery method during root canal treatment. An interdisciplinary approach involving wellestablished methods from the fi eld of fl uid dynamics can provide new insights into the mechanisms involved in cleaning and disinfection of the root canal system by this method. In addition to the equipment used clinically (syringes and needles), this chapter will also discuss the physical properties of commonly used irrigants, the fl ow developed inside the root canal system, irrigant refreshment, forces applied on the root canal wall, entrapment and removal of air bubbles, and the anatomical challenges faced by syringe irrigation. Essential background knowledge on fl uid dynamics will also be provided.

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“…A atuação física da irrigação dos canais radiculares pode ser influenciada por diversos fatores, entre os quais: tipo e diâmetro da agulha irrigadora 3,4 , profundidade da agulha no interior do canal 3,5 , diâmetro final do preparo 6,7 , diâmetro foraminal 8,9 e grau de curvatura do canal 5,10 , além do volume e das propriedades da solução irrigadora utilizada 11 . A ação da solução irrigadora pode ser afetada negativamente por agulhas de grande diâmetro, por maiores distâncias entre a ponta da agulha e o batente apical, e também por canais pouco dilatados 5 .…”

Section: Introductionunclassified

Influência do diâmetro foraminal do canal radicular, do tipo e da penetração de agulha, e do fluxo da solução irrigadora na limpeza e na extrusão apical

Tanomaru‐Filho

Loiola

Miano

et al. 2014

Rev. odontol. UNESP

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Influência do diâmetro foraminal do canal radicular, do tipo e da penetração de agulha, e do fluxo da solução irrigadora na limpeza e na extrusão apical Descritores: Endodontia; irrigantes do canal radicular; radiologia. Abstract Introduction:The root canal irrigation aims to clean and disinfect the root canal system, without causing apical extrusion. Objective: To evaluate the influence of apical foramen diameter, needle penetration depth and needle design, and the irrigating solution flow rate on the cleaning and apical extrusion. Material and method: Roots of human mandibular incisors with single-canal were instrumented and after enlarged with two different root apical sizes (40 and 60 K-files), the root canals were filled with contrast solution thickened with propylene glycol and zinc oxide. Two types of irrigation needles (27-gauge) with different designs (apical or lateral opening) were used, two flow rates corresponding to 15 or 25 mL/min and needle penetration at two depths (3 and 6 mm from the apex). Before and after irrigation, the teeth were radiographed using a digital radiographic system. Pre-irrigation (canals filled with contrast) and post-irrigation (canals with remaining contrast) images were submitted to digital subtraction using the Adobe Photoshop CS4 software and the areas were measured using the Image Tool 3.0 software, obtaining the percentage of cleaning and extrusion. Data obtained were subjected to one-way ANOVA and Tukey's tests with the significance level of 5%. Result: There was no statistical difference between the apical foramen diameter, needle penetration depth and needle design, and the irrigating solution flow rate on the cleaning results (more than 97%) and the level of apical extrusion (less than 0.38 mm 2 ), (p>0,05). Conclusion: All irrigation protocols evaluated provided cleaning of the root canal and low apical extrusion of irrigating solution.

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The Influence of Canal Curvature on the Mechanical Efficacy of Root Canal Irrigation In Vitro Using Real-Time Imaging of Bioluminescent Bacteria

Cited by 46 publications

References 30 publications

Positive Pressure Irrigation

Positive Pressure Irrigation

Syringe Irrigation: Blending Endodontics and Fluid Dynamics

Influência do diâmetro foraminal do canal radicular, do tipo e da penetração de agulha, e do fluxo da solução irrigadora na limpeza e na extrusão apical

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