Apical Pressure and Extent of Irrigant Flow beyond the Needle Tip during Positive-pressure Irrigation in an In Vitro Root Canal Model

Park, Ellen; Shen, Ya; Khakpour, Mehrzad; Haapasalo, Markus

doi:10.1016/j.joen.2012.12.004

Cited by 76 publications

(74 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The range of apical pressures generated during positive pressure irrigation in this study showed excellent agreement with the range of pressures calculated for simulated irrigation at 6 mL/min using CFD analysis with the SST k-ω model in a previous study [ 108 ]. If the minimum and maximum apical pressure measurements calculated in this CFD study are converted into the pressure units used by Park et al [ 223 ] for a similar needle design and size, the apical pressure range is similar. The CFD study range was 8-12 mmHg [ 108 ], in comparison to 5-15 mmHg in the direct measurement study [ 223 ].…”

Section: Irrigation Pressure In the Apical Canalsupporting

confidence: 81%

“…Recently, Park et al [ 223 ] developed a piezoresistive pressure transducer model to measure apical pressure during root canal irrigation using an in vitro human tooth method. The tooth was placed in an airtight custom fi xture coupled to a piezoresistive pressure transducer.…”

Section: Irrigation Pressure In the Apical Canalmentioning

confidence: 99%

“…If the minimum and maximum apical pressure measurements calculated in this CFD study are converted into the pressure units used by Park et al [ 223 ] for a similar needle design and size, the apical pressure range is similar. The CFD study range was 8-12 mmHg [ 108 ], in comparison to 5-15 mmHg in the direct measurement study [ 223 ]. Thus, the new method of direct measurement of apical pressure seems reproducible and represents a direct approach to validating CFD estimations.…”

Section: Irrigation Pressure In the Apical Canalmentioning

confidence: 99%

See 2 more Smart Citations

Research on Irrigation: Methods and Models

Shen

Gao

Lin

et al. 2015

Endodontic Irrigation

Self Cite

View full text Add to dashboard Cite

Irrigation is regarded by many as being the most important part of root canal treatment. It has several different functions and goals depending on the type of the irrigant used: irrigation reduces friction between the instrument and dentin, improves the cutting effectiveness of the fi les, and dissolves organic and inorganic matter. It also cools the tooth and the fi le; it has a washing effect and removes loose debris and bacteria from the canal. Last but not least, irrigation acts against root canal biofi lms. Irrigation is also the only way to impact those areas of the root canal wall not touched by mechanical instrumentation. The factors that remain a challenge in the irrigation and disinfection of the root canal include biofi lm resistance, poor penetration of the irrigant, and exchange of irrigants in the highly complex root canal anatomy. Progress in the search for better irrigants and irrigant delivery is necessary. A variety of different study models have been used in endodontic research on irrigation. One of the issues is how to make a rational choice for a study model that is relevant for the question at hand. This article presents an overview of the methods and models that have been used in endodontic literature to study irrigation.

show abstract

Section: Irrigation Pressure In the Apical Canalsupporting

confidence: 81%

Section: Irrigation Pressure In the Apical Canalmentioning

confidence: 99%

Section: Irrigation Pressure In the Apical Canalmentioning

confidence: 99%

See 1 more Smart Citation

Research on Irrigation: Methods and Models

Shen

Gao

Lin

et al. 2015

Endodontic Irrigation

Self Cite

View full text Add to dashboard Cite

show abstract

“…Sin embargo, el aumento de la velocidad de flujo da lugar al aumento de la presión apical independientemente del diseño de la aguja (26,27) y el aumento de extrusión (24). Por lo tanto la velocidad de flujo utilizada en el presente estudio se decidió con base al estudio realizado por Park et al (26), quienes reportaron que las velocidades de flujo más allá de 4 ml/min aumentan la presión apical pero no el reemplazo del agente irrigante.…”

Section: Discussionunclassified

Irrigant extrusion according to irrigation technique in human teeth, ex vivo

Ramos

Adorno

2016

Mem. Inst. Investig. Cienc. Salud

View full text Add to dashboard Cite

Cómo referenciar este artículo/ How to reference this article:Ramos E, Adorno CG. Evaluación de la extrusión del agente irrigante de acuerdo a la técnica de irrigación en dientes humanos, ex vivo. Mem. Inst. Investig. Cienc. Salud. 2016;14(1):50-56 R E S U M E NEl agente irrigante debería alcanzar la totalidad del conducto radicular, inclusive las zonas más apicales, para mejor la limpieza y desinfección. Sin embargo existe el riesgo de la extrusión del mismo a los tejidos periapicales. El presente estudio con diseño experimental tuvo el objetivo de evaluar la extrusión apical del agente irrigante endodóntico de acuerdo a la técnica de irrigación durante la irrigación final en dientes naturales, ex vivo. Se utilizaron 46 dientes anterosuperiores naturales extraídos con conducto único y las raíces se sumergieron en una gelatina conductora incolora. Una aguja de irrigación/aspiración fue colocada a 2 mm de la longitud de trabajo y se irrigaron los conductos con una solución de contraste a 4 ml/min durante 60 s. En 18 dientes se utilizó la técnica de irrigación por jeringa y en los 18 restantes se utilizó la técnica por presión negativa. Los controles positivos y negativos estaban compuestos por 5 dientes cada uno. Se evaluaron presencia y área de extrusión. La prueba Chi 2 encontró una asociación estadísticamente significativa (p <0,001) entre la presencia de extrusión y la técnica de irrigación. El área mediana de extrusión provocada por irrigación por jeringa (0,645 mm 2 ) fue estadísticamente mayor a la provocada por la irrigación por presión negativa (0 mm 2 ) (U Mann Whitney, p <0,001). Se concluyó que la irrigación por presión negativa produce menos extrusión de la solución irrigante, no sólo en frecuencia sino también en área de extrusión comparado con la irrigación por jeringa.Palabras Clave: Irrigación por presión negativa; Irrigación por jeringa; extrusión, endodoncia, conductos radiculares. Irrigant extrusion according to irrigation technique in human teeth, ex vivo A B S T R A C TRoot canal irrigants should be able reach the entire root canal system, including the most apical portions, in order to achieve better cleaning and disinfection. However, there exists a risk of irrigant extrusion to the perirradicular area. The present study had an experimental design with the purpose of evaluating irrigant apical extrusion of the endodontic irrigant according to the irrigating technique during final irrigation y extracted human teeth, ex vivo. Forty six anterior upper single canaled teeth were used and the roots were embedded into a conducting transparent gel. An irrigating/aspirating needle was placed 2 mm from working length and irrigation was performed with a contrast solution at 4 ml/min during 60 s. Eighteen teeth were used for syringe irrigation and negative pressure irrigation each.

show abstract

“…The clinical implication is that the irrigant solution must be delivered through the canal orifice, flow and exit back via the same orifice. The only way to overcome that "virtual barrier" would be to elevate the flux ratio and consequently the intracanal pressure (30). This will result in the extrusion of toxic irrigants to the apical tissues eliciting an inflammatory response with necrosis of the affected area and edema (31).…”

Section: Factors Affecting Efficacy Of Positive Pressure Irrigation Cmentioning

confidence: 99%