The effect of dentinal tubule orientation on the removal of smear layer by root canal Irrigants

Cengiz, Turan; Aktener, Bekir Oğuz; Pişkin, Beyser

doi:10.1111/j.1365-2591.1990.tb00094.x

Cited by 47 publications

(55 citation statements)

References 13 publications

(17 reference statements)

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“…This combination has proved to remove debris, smear layer and smear plugs more efficiently than sodium hypochlorite alone. 14,15,17 In the present study, the use of sodium hypochlorite with EDTA did not result in superior cleaning of the root canals, when compared to the two plant extracts analyzed, and accumulation of the smear layer, mainly in the apical third, was observed in all specimens examined. Greater smear layer accumulation in the apical third has also been reported by others.…”

Section: Discussioncontrasting

confidence: 52%

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In vitro evaluation of the root canal cleaning ability of plant extracts and their antimicrobial action

et al. 2012

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In vitro evaluation of the root canal cleaning ability of plant extracts and their antimicrobial action Abstract: This in vitro study evaluated both the antimicrobial activity and the root canal cleaning ability of plant extracts used in irrigation solutions. The antimicrobial activities of the aroeira-da-praia (Schinus terebintifolius Raddi) and the quixabeira (Syderoxylum obtusifolium Roem & Schult) hydroalcoholic extracts, of 2.5% sodium hypochlorite (NaOCl) and of 0.12% chlorhexidine (positive control) against Enterococcus faecalis were tested with the agar well diffusion method. The level of root canal cleanliness was examined by scanning electron microscopy (SEM). Twenty one single-rooted human teeth were divided into three groups according to the irrigation solution applied: 1) 50% aroeira-da-praia; 2) 50% quixabeira and 3) a combination of 2.5% sodium hypochlorite + 17% EDTA. All solutions tested demonstrated antimicrobial activity against Enterococcus faecalis. The SEM analysis revealed that higher and lower degrees of surface cleaning were observed, in the three groups, respectively for the coronal and apical thirds, in that quixabeira showed the greatest efficiency in removing the smear layer in the apical third. All the agents tested presented antimicrobial activity against E. faecalis. None, however, was able to completely remove the smear layer of the dentinal surface in the different thirds of the root canal. The results suggest that the analyzed plant extracts may represent a new therapeutic option in the list of alternative agents available for endodontic treatment.

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Section: Discussioncontrasting

confidence: 52%

“…A number of agents have been used in endodontic therapy as auxiliary chemical solutions during chemical-mechanical preparation. Among these, sodium hypochlorite 14,15,17 and chlorhexidine [18][19][20] have widespread use. This can probably be attributed to their antimicrobial action.…”

Section: Discussionmentioning

confidence: 99%

In vitro evaluation of the root canal cleaning ability of plant extracts and their antimicrobial action

et al. 2012

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“…4 The use of a combination of sodium hypochlorite (NaOCl) and EDTA is effective in the removal of organic and inorganic debris. 5,6,7,8 NaOCl is known for its antibacterial properties and its ability to dissolve organic components. 9,10 EDTA is a Ca +2 chelating agent and therefore capable of removing the smear layer.…”

Section: Introductionmentioning

confidence: 99%

Dissolution of bovine pulp tissue in solutions consisting of varying NaOCl concentrations and combined with EDTA

et al. 2010

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This in vitro study evaluated (1) the dissolution of bovine pulp tissue in solutions consisting of varying NaOCl concentrations and combined with EDTA; and (2) the pH of these solutions before and after the experiment. The independent variables were the concentration and the volume of the solution. Thirty bovine pulps were divided in equal fragments, resulting in 90 fragments of pulp tissue. Each fragment was immersed in one of the following solutions: 1% NaOCl (4 ml), 2.5% NaOCl (4 ml), 1% NaOCl + 17% EDTA (2 ml : 2 ml), 1% NaOCl + 17% EDTA (1 ml : 3 ml), 2.5% NaOCl + 17% EDTA (2 ml : 2 ml), and 2.5% NaOCl + 17% EDTA (1 ml : 3 ml). The test solutions were dichotomized as either able or not able to dissolve the tissue, the latter being attributed when the dissolution of the pulp tissue was not complete within 48 hours. When the samples were able to dissolve the tissue, the time required for complete tissue dissolution was submitted to statistical analysis. The pH of the solutions was measured before and after the experiment. The pH variable was dichotomized as either changed or unchanged. The results demonstrated that the NaOCl solutions combined with 17% EDTA were not able to dissolve the tissue. The t-test revealed that the 2.5% NaOCl solution presented a lower mean dissolution time than the 1% NaOCl solution (p < 0.001). The pH of the solutions with equal volumes of NaOCl and EDTA decreased in 48 hours.

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“…Portanto, o saneamento do sistema de canais é conseguido através do cuidadoso preparo mecânico, associado à ação químico-medicamentosa de substâncias auxiliares eleitas para cada caso [1][2][3][4][5][6][7] . Os solventes de matéria orgânica e os agentes quelantes têm sido reconhecidos como elementos importantes para o processo de saneamento endodônti co. No parti cular, tem sido investi gada a ação do EDTA isolada, alternada ou associada a outras substâncias, com o objeti vo de se remover a camada residual da superfí cie denti nária [8][9][10][11][12][13][14] . O primeiro estudo a observar a camada residual nas paredes dos canais radiculares instrumentados 8 , relatou a sua semelhança, em aparência, àquela produzida por instrumentos manuais em restaurações coronárias descritas em 1970 15 .…”

Section: Introductionunclassified

Estudo da Ação do Edta Sobre a Camada Residual no Tempo de 1 e 3 Minutos

Gesteira¹,

Silva²,

Lenzi³

et al. 2009

Pesq Bras Odontoped Clin Integr

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RESUMO ABSTRACTObjeti vo: Analisar, in vitro, através da Microscopia Eletrônica de Varredura, o efeito do EDTA nas concentrações de 3%, 5%, 10% e 17%, na remoção da camada residual e na desobstrução dos túbulos denti nários, nos tempos de 1 e 3 minutos. Método: Da amostra consti tuída de 80 dentes, foram selecionadas, randomicamente, oito unidades para compor o grupo controle negati vo (GC1) e 8 para consti tuírem o grupo controle positi vo (GC2 Objecti ve: To analyze, in vitro, by scanning electron microscopy (SEM), the eff ect of EDTA at concentrati ons of 3%, 5%, 10% and 17% for 1 and 3 minutes, on the removal of the smear layer and opening of denti nal tubules. Method: Eighty teeth were randomly assigned to groups as follows: 8 specimens were allocated to the negati ve control group (CG1), 8 to the positi ve control group (GC2), and the other 64 were distributed to 8 experimental groups (ExpG). Aft er root canal instrumentati on, fi nal irrigati on was done with the EDTA soluti ons, which were left in contact with the denti n surfaces for 1 and 3 minutes. Results: The analysis of the SEM micrographs at ×2,000 magnifi cati on revealed that 10% and 17% EDTA soluti ons were the most eff ecti ve, regardless of the applicati on ti me. Conclusion: Regarding the smear layer removal and denti nal tubule opening, the effi cacy of EDTA is not altered with the increase of the applicati on ti me from 1 to 3 minutes.

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The effect of dentinal tubule orientation on the removal of smear layer by root canal Irrigants

Cited by 47 publications

References 13 publications

In vitro evaluation of the root canal cleaning ability of plant extracts and their antimicrobial action

In vitro evaluation of the root canal cleaning ability of plant extracts and their antimicrobial action

Dissolution of bovine pulp tissue in solutions consisting of varying NaOCl concentrations and combined with EDTA

Estudo da Ação do Edta Sobre a Camada Residual no Tempo de 1 e 3 Minutos

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