Smear removal agents: A quantitative study in vivo and in vitro

Meryon, S.D.; Tobias, R. S.; Jakeman, K. J.

doi:10.1016/0022-3913(87)90142-9

Cited by 60 publications

(31 citation statements)

References 8 publications

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“…It has been suggested that the hydrostatic pulpal pressure, the dentinal fluid flow and the increased dentinal wetness in vital dentin can affect the intimate interaction of certain dentin adhesives with dentinal tissue. [32][33][34] These findings are supported by studies that demonstrated low bond strength 35 Hannig and Friedrichs also observed that a completely gap-free adaptation between composite and dentin could not be achieved reproducibly and consistently, either in vivo or in vitro, in cavities with a high C-factor. 36 They found that Prime & Bond 2.1 gave better results when applied in vitro, as compared to in vivo restorations.…”

Section: Discussionsupporting

confidence: 71%

Effect of Various Surface Treatments on the Microleakage and Ultrastructure of Resin-tooth Interface

Nagpal¹,

Tewari²

2007

Operative Dentistry

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Operative Dentistry, 2007, 32-1, 16-23 R Nagpal • S Tewari • R Gupta Clinical RelevanceUnder both moist and dry conditions, the application of sodium ascorbate on sodium hypochlorite-treated acid-etched dentin reduced microleakage and improved tubular penetration. SUMMARYThis study evaluated the effect of collagen removal and sodium ascorbate treatment of acidetched dentin on the microleakage and ultrastructure of resin-tooth interface under moist and dry conditions using an acetone-based 1 bottle adhesive system. Class V cavities were made on the buccal surfaces of 90 premolars scheduled for orthodontic extraction. The cavities were etched with 37% phosphoric acid (DPI tooth conditioning gel/India) for 15 seconds. The teeth were divided into six groups with 15 teeth each. In Group 1, the etched surface was blot dried with a dry cotton pellet, leaving it visibly moist, and Prime & Bond NT (Dentsply Detrey/ Germany) was applied. In Group 2, after acid conditioning, the cavity surface was air dried for five seconds, followed by application of Prime & Bond NT. In Group 3, 3% NaOCl (Hyposol, Prevest Denpro Ltd/India) was applied to the acid-conditioned cavity surface for two minutes. The surface was blot dried before bonding. In Group 4, after NaOCl treatment, the surface was air dried for five seconds, followed by application of the bonding agent. In Group 5, 10% sodium ascorbate (chemically pure) was applied to the NaOCltreated acid conditioned tooth surface for one minute. The surface was blot dried before bonding. In Group 6, after sodium ascorbate treatment as in Group 5, the cavity surface was air dried for five seconds before bonding. The cavities were restored with the hybrid composite Spectrum TPH (Dentsply Detrey, Konstanz, Germany). The teeth were extracted immediately after restoration, and the specimens were prepared for microleakage testing using 2% methylene blue dye and for scanning electron microscopic evaluation. The results of the dye penetration were analyzed with Kruskal-Wallis non-parametric analysis followed by the Mann-Whitney U test at a significance level of p=0.05. After acid etching, the conventional acid etched groups and groups with NaOCl treatment demonstrated extensive leakage. Sodium ascorbate treatment of the NaOCl-treated dentin significantly reduced microleakage. No statistically significant difference between moist and dry bonding was observed in all groups. Although resin tag penetration improved in both the NaOCl-treated and NaOCl/ascorbate-treated groups, an absence of gap at the resin dentin interface was observed only for the NaOCl/ascorbate-treated groups.

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Section: Discussionsupporting

confidence: 71%

Effect of Various Surface Treatments on the Microleakage and Ultrastructure of Resin-tooth Interface

Nagpal¹,

Tewari²

2007

Operative Dentistry

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“…EDTA: 17% EDTA at the apical third, 2,000Â; citric: 42% citric acid at the apical third, 2,000Â; MTAD: MTAD at the apical third, 2,000Â; and control: control group at the apical third, 2,000Â. apical third although erosive effects of EDTA and citric acid have been reported in several studies (12,31,(39)(40)(41). BioPure MTAD is comparatively more aggressive in demineralizing intact intraradicular dentin and was able to expose collagen matrices 1.5 to 2 times as thick as those produced with EDTA (42).…”

Section: Discussionmentioning

confidence: 99%

A Comparative Study of Smear Layer Removal and Erosion in Apical Intraradicular Dentine With Three Irrigating Solutions: A Scanning Electron Microscopy Evaluation

Mancini

Armellin

Casaglia

et al. 2009

Journal of Endodontics

112

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Introduction: This study compared the efficacy of BioPure MTAD (Dentsply Tulsa, Tulsa, OK), 17% EDTA, and 42% citric acid in endodontic smear layer removal and degree of erosion in the apical third of endodontic canals. Methods: Ninety-six extracted single-rooted human teeth were randomized into four groups (n = 24) and instrumented using System GT nickel-titanium rotary instruments (Dentsply Tulsa, Tulsa, OK). Each canal was irrigated with one of the following solutions: BioPure MTAD, 17% EDTA, 42% citric acid, or 5.25% NaOCl (control). Next, all specimens were irrigated with 5.25% NaOCl. Results: Evaluation by scanning electron microscopy showed no significant differences among test irrigants in removing the smear layer. However, the efficacy of BioPure MTAD and 17% EDTA in removing the smear layer was significantly greater than 5.25% NaOCl (control). The erosive effects of irrigating solutions could not be evaluated. Conclusions: In conclusion, the protocols used in this study were not sufficient to completely remove the smear layer in the apical third of prepared root canals. (J Endod 2009;35:900-903)

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“…EDTA has been shown to remove smear layer to expose the dentin matrix (21,22) and also appears not to damage stem cells (23). Dentin matrix was exposed to allow the mesenchymal stem cells to interact with dentin matrix that might help differentiate into odontoblast-like cells.…”

Section: Effects Of Demineralization and Exposure Of Dentin Matrixmentioning

confidence: 97%

Tissue Engineering Strategies for Immature Teeth with Apical Periodontitis

Yamauchi

Nagaoka

et al. 2011

Journal of Endodontics

146

154

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Smear removal agents: A quantitative study in vivo and in vitro

Cited by 60 publications

References 8 publications

Effect of Various Surface Treatments on the Microleakage and Ultrastructure of Resin-tooth Interface

Effect of Various Surface Treatments on the Microleakage and Ultrastructure of Resin-tooth Interface

A Comparative Study of Smear Layer Removal and Erosion in Apical Intraradicular Dentine With Three Irrigating Solutions: A Scanning Electron Microscopy Evaluation

Tissue Engineering Strategies for Immature Teeth with Apical Periodontitis

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