Effect of Maintaining Apical Patency on Irrigant Penetration into the Apical Third of Root Canals When Using Passive Ultrasonic Irrigation: An In Vivo Study

Vera, Jorge; Arias, Ana; Romero, María Falcón

doi:10.1016/j.joen.2011.05.042

Cited by 53 publications

(45 citation statements)

References 31 publications

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“…12 In another study with the same method, penetration of irrigants into the apical part of large canals, including distal roots of lower molars with one canal, palatal roots of upper molars, and 19 to 21 mm-length anterior teeth, was studied, and showed higher presence of NaOCl/solution in the apical area of the canal compared with those patency not established. 13 According to…”

Section: Effect On Reaching Irrigant To the Apical Thirdmentioning

confidence: 99%

Establishing Apical Patency: To be or not to be?

Mohammadi¹,

Jafarzadeh

Shalavi

et al. 2017

The Journal of Contemporary Dental Practice

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Introduction:The apical portion of the root canal is very complex and challenging during endodontic treatment. Root canal preparation and obturation to the apical constriction may provide the best prognosis. Incomplete debridement, foramen transportation, and inadequate seal in the apical portion are considered to be responsible for treatment failure. The technique "apical patency" is considered as a way for maintaining the apical part the free of the debris by recapitulation, using a small K-file through the area of the apical foramen. This term was firstly proposed by Buchanan. In this technique, the smallest diameter file is set 1 mm longer than working length and recapitulated after each instrument to prevent packing of debris in the apical part. Apical patency has been found to be effective in achieving an apical seal with gutta-percha. Teeth prepared with a step back method and with maintained apical patency may show less leakage when obturated with cold lateral condensation technique. Data regarding the effect of apical patency on the healing of periapical tissue are very scarce, and it has been shown that the patency file has detrimental effect on the healing of periapical tissues in animal studies. However, using patency file in endodontic treatment is controversial and further studies are needed. The purpose of this article is to review the effect of using a patency file on the extrusion of root canal contents, the apical seal, postoperative pain, and healing of periapical tissues. Furthermore, the effect of establishing patency on reaching irrigation solutions to the apical portion of the canal and prognosis of root canal treatment are discussed.

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Section: Effect On Reaching Irrigant To the Apical Thirdmentioning

confidence: 99%

Establishing Apical Patency: To be or not to be?

Mohammadi¹,

Jafarzadeh

Shalavi

et al. 2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

show abstract

“…The loss of integrity of apical tissues and the fact that necrotic pulp tissue is less intact than a vital pulp, or even nonexistent in some cases, facilitates a free flow of irrigants to the apical end of the root canal. Recent studies by Vera et al (34)(35)(36) using a similar methodology analyzed the dynamics of irrigants using the needle of smaller gauge. Their result concluded that irrigant penetration is very limited during root canal treatment and it is also conditioned by the formation of gas bubbles that get trapped at the apical or even middle third.…”

Section: Factors Affecting Efficacy Of Positive Pressure Irrigation Cmentioning

confidence: 99%

“…In a series of studies, Vera et al (34)(35)(36) analyzed the effect of patency files on NaOCl penetration using a radiopaque contrast media. The studies concluded that maintaining apical patency did not have a significant effect on irrigant penetration at the apical third, even when canals were prepared to a size 30/09.…”

Section: Patencymentioning

confidence: 99%

Positive Pressure Irrigation

Gregorio

Heilborn

Cohenca

2014

Disinfection of Root Canal Systems

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“…Because of the inability to analyse commonly used irrigant penetration and distribution in the root canal system, researchers have recently relied on the radiographic tracing of radiopaque solutions (1)(2)(3)(4)(5)(6)(7)(8)(9)(10), or in the observation of cleared teeth (1-3), using sodium hypochlorite (NaOCl) solutions made directly visible by the addition of dyes.…”

Section: Introductionmentioning

confidence: 99%

Effect of an Alcohol-Based Caries Detector on the Surface Tension of Sodium Hypochlorite Preparations

Rossi‐Fedele

Guastalli

2015

Braz. Dent. J.

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The purpose of this study was to evaluate the effect of an alcohol-based caries detector (Kurakay) on the surface tension of a conventional sodium hypochlorite (NaOCl) preparation, and a product containing a surface-active agent (Chlor-XTRA). The surface tensions of the following solutions were tested: NaOCl, a mixture of NaOCl and Kurakay 9:1 w/w, Chlor-XTRA, a mixture of Chlor-XTRA and Kurakay 9:1 w/w. Ten measurements per test solution were made at 20 °C, using an optical method called the "Pendant drop method", with a commercially available apparatus. The addition of Kurakay reduced the surface tension for NaOCl (p<0.05) whilst no significant difference was detected for Chlor-XTRA (p>0.05). Statistically significant differences between the NaOCl and Chlor-XTRA groups were found (p<0.05). The addition of an alcohol-based caries detector resulted in a reduction of the original surface tension values for NaOCl only. Taking into account the fact that mixtures of NaOCl and Kurakay have been used to assess the penetration of root canal irrigants in vitro, the related changes in surface tension are a possible source of bias.

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Effect of Maintaining Apical Patency on Irrigant Penetration into the Apical Third of Root Canals When Using Passive Ultrasonic Irrigation: An In Vivo Study

Cited by 53 publications

References 31 publications

Establishing Apical Patency: To be or not to be?

Establishing Apical Patency: To be or not to be?

Positive Pressure Irrigation

Effect of an Alcohol-Based Caries Detector on the Surface Tension of Sodium Hypochlorite Preparations

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