The effect of the canal‐filled area on the bacterial leakage of oval‐shaped canals

De‐Deus, Gustavo; Murad, Cristiana Francescutti; Paciornik, Sidnei; Reis, Cecília; Coutinho-Filho, Tauby de Souza

doi:10.1111/j.1365-2591.2007.01320.x

Cited by 57 publications

(85 citation statements)

References 25 publications

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“…The use of molars was proposed due to their high incidence in endodontic treatment, and the choice of the distobuccal root of the maxillary molar was based on a standardization criterion 9 . Various bacteria have been used in microleakage studies [17][18]21,25 . However, there is a focus on E. faecalis because of its resistance [19][20]22,24 , survival in nutrient-poor areas over long periods 26 , and association with persistent chronic periapical lesions 27 .…”

Section: Discussionmentioning

confidence: 99%

Comparison of three obturation techniques with regard to bacterial leakage

Nabeshima¹,

Martins²,

Leonardo³

et al. 2013

Braz. J. Oral Sci.

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Aim: To compare bacterial leakage in root canals obturated with the modified single-cone, lateral condensation, and continuous wave of condensation techniques. Methods: Distobuccal root canals of maxillary molars were shaped up to ProTaper F2 and obturated with modified singlecone, lateral condensation or continuous wave of condensation technique. Two-chamber bacterial model using Enterococcus faecalis was employed for bacterial leakage evaluation for 30 days. The chi-square test was applied to evaluate differences between turbid and non-turbid samples, and the Kruskal-Wallis test was used for evaluating the time necessary for microleakage. A significance level of 5% was set for all analyses. Results: The modified single-cone technique showed leakage in 73.3% of samples, lateral condensation in 66.6%, and continuous wave of condensation in 53.3%, but there were no significant differences among the groups (p>0.05). Conclusions: It can be concluded that the modified single-cone technique shows similar sealing efficacy to that of lateral condensation and continuous wave of condensation technique.

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Section: Discussionmentioning

confidence: 99%

Comparison of three obturation techniques with regard to bacterial leakage

Nabeshima¹,

Martins²,

Leonardo³

et al. 2013

Braz. J. Oral Sci.

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“…Definitivamente, el sellado del conducto radicular mejora entre más gutapercha exista y menos cemento presente. Dicha situación hace pensar que todos los conductos radiculares, incluyendo los que presenten anatomías complejas, deberían ser obturados con técnicas de gutapercha caliente, más que con técnicas en frío (27).…”

Section: Discussionunclassified

Evaluación in vitro de la microfiltración de Enterococcus faecalis usando cinco técnicas de obturación / In Vitro Evaluation of Enterococcus faecalis Microleakage Using Five Obturation Techniques

Matamoros

Moya

González³

et al. 2016

Univ Odontol

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RESUMENAntecedentes: La técnica de obturación de conductos radiculares, denominada condensación híbrida-mixta, combina las ventajas de la técnica lateral (en frío) con la técnica termoplastificada (con calor). Hasta el momento, su efectividad de sellado no se ha estudiado. Propósito: Evaluar la capacidad de sellado de conductos radiculares obturados con técnicas de condensación lateral, condensación vertical, cono único, con portador-Guttacore® y condensación híbrida-mixta. Métodos: 50 dientes premolares extraídos por indicación ortodóntica y preparados con lima Primary de WaveOne® se distribuyeron en cinco grupos y se obturaron con cono único no estandarizado Primary de WaveOne®, condensación lateral utilizando conos de gutapercha al 2 %, obturadores calibre 30 Gutacore®, condensación vertical con cono Primary de WaveOne® e inyección de gutapercha tipo alfa del sistema Beefill®; condensación híbrida-mixta, modificando la condensación lateral con calor e inyectando gutapercha tipo alfa del Beefill®. El Enterococcus faecalis fue inoculado por la porción coronal. Se determinó microfiltración con el cambio de color y turbidez en el caldo de cultivo con rojo de fenol. Se incubaron a 37 °C durante 12 semanas. Los especímenes fueron observados por microscopia electrónica de barrido. Resultados: 11 especímenes (22 %) presentaron filtración. El 46 % de los especímenes, con cono único; el 30 %, con Gutacore®; el 20 %, con condensación lateral; el 10 %, con la técnica de condensación vertical, y ninguno con condensación híbrida-mixta. Conclusión: La técnica de condensación híbrida-mixta mostró ser la más eficiente para cumplir con el objetivo de un sellado adecuado y prevenir la contaminación microbiana de los conductos en el tratamiento endodóntico. PALABRAS CLAVEEnterococcus faecalis; gutapercha; microfiltración; obturación de conductos; técnica condensación híbrida mixta ÁREAS TEMÁTICAS endodoncia; microbiología oral ABSTRACT Background:The root canal filling technique named Hybrid-Mixed Condensation, combines the advantages of cold lateral and warm vertical condensation. The ability of avoiding microbial microleakage has not been proven. Purpose: To evaluate the differences of microbial microleakage using Enterococcus faecalis, in canals obturated with five different techniques: lateral, warm vertical, WaveOne® single cone, Guttacore®, and Hybrid-mixed condensation. Methods: 50 single-rooted human premolars extracted for orthodontic reasons were biomechanical prepared with primary file of WaveOne® system. Teeth were divided into 5 groups using different obturation techniques: single cone with WaveOne® Primary, lateral condensation using 2% gutta-percha cones, Guttacore® 30, warm vertical condensation using down packing in a WaveOne® Primary cone and backfill with alpha gutapercha of Beefill®, and the hybrid mixed condensation modifying the lateral condensation with heat and a backfill using Beefill®. Enterococcus faecalis was inoculated in the coronal third and apices were immersed in brain heart infusion broth with p...

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“…16 This individual anatomic post favors the adaptation of the post to root walls and reduces resin cement thickness. 15 The procedure of "individualizing" the post through resin layer, although advisable in all cases, appears to be particularly effective to improve post retention when dealing with canals of elliptic shape, or exhibiting a reduced amount of residual root structure after endodontic treatment. This latter situation obviously contraindicates further removal of dentin to make the canal shape match the post shape.…”

Section: Introductionmentioning

confidence: 99%

“…14 In some cases, if the post does not fit well, especially at the coronal level, the resin cement layer is excessively thick, and bubbles are likely to form, thus predisposing it to debonding. 15 The solution to overcome this problem is to reline the fiber post with composite resin. 16 This individual anatomic post favors the adaptation of the post to root walls and reduces resin cement thickness.…”

Section: Introductionmentioning

confidence: 99%