A scanning electron microscopic study of tooth surface changes induced by tannic acid

Sabbak, Sahar A.; Hassanin, M. B.

doi:10.1016/s0022-3913(98)70212-4

Cited by 14 publications

(12 citation statements)

References 26 publications

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“…Canal walls irrigated with this solution appeared significantly cleaner and smoother than walls treated with a combination of hydrogen peroxide and NaOCl, and the smear layer was removed. Sabbak & Hassanin (1998) refuted these findings and explained that tannic acid increased the cross‐linking of exposed collagen with the smear layer and within the matrix of the underlying dentine, therefore increasing organic cohesion to the tubules.…”

Section: Methods To Remove the Smear Layermentioning

confidence: 94%

The smear layer in endodontics – a review

2009

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Root canal instrumentation produces a layer of organic and inorganic material called the smear layer that may also contain bacteria and their by-products. It can prevent the penetration of intracanal medicaments into dentinal tubules and influence the adaptation of filling materials to canal walls. This article provides an overview of the smear layer, focusing on its relevance to endodontics. The PubMed database was used initially; the reference list for smear layer featured 1277 articles, and for both smear layer dentine and smear layer root canal revealed 1455 publications. Smear layer endodontics disclosed 408 papers. A forward search was undertaken on selected articles and using some author names. Potentially relevant material was also sought in contemporary endodontic texts, whilst older books revealed historic information and primary research not found electronically, such that this paper does not represent a 'classical' review. Data obtained suggests that smear layer removal should enhance canal disinfection. Current methods of smear removal include chemical, ultrasonic and laser techniques - none of which are totally effective throughout the length of all canals or are universally accepted. If smear is to be removed, the method of choice seems to be the alternate use of ethylenediaminetetraacetic acid and sodium hypochlorite solutions. Conflict remains regarding the removal of the smear layer before filling root canals, with investigations required to determine the role of the smear layer in the outcomes of root canal treatment.

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Section: Methods To Remove the Smear Layermentioning

confidence: 94%

The smear layer in endodontics – a review

2009

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“…Reports of tannic acid use in dentistry as a desensitizing agent, astringent, and surface treatment for smear layer removal have been previously described (Bitter, 1989;Prati et al, 1992;Sabbak and Hassanin, 1998;Natsir et al, 1999;Okamoto et al, 1991;Tomiyama et al, 2004), but no information exists regarding its effect on the mechanical properties of dentin and adhesive-dentin interfaces. The present study showed that tannic acid significantly affected dentin matrix properties and resin-dentin bond strength; therefore, the null hypotheses must be rejected.…”

Section: Discussionmentioning

confidence: 99%

“…The effect of TA treatment on resin-enamel bond strengths must also be evaluated prior to recommended clinical use. It has been observed that 20% and 25%TA did not completely remove the smear layer on prepared dentin and left the orifices of dentinal tubules partially occluded when applied for 10 and 15 min to undemineralized dentin disks (Sabbak and Hassanin, 1998). Those results reinforce the weak acidity of TA (pKa = 4.4), which would probably have low impact on further demineralization of the dentin surface and consequently may partially explain the lack of difference in the bond strengths between pH 2.8 and 7.4 TA-treated groups.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Properties of Tannic-acid-treated Dentin Matrix

et al. 2009

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Dentin collagen is a major component of the hybrid layer, and its stability may have a great impact on the properties of adhesive interfaces. We tested the hypothesis that the use of tannic acid (TA), a collagen cross-linking agent, may affect the mechanical properties and stability of the dentin matrix. The present study evaluated the effects of different concentrations of TA on the modulus of elasticity and enzymatic degradation of dentin matrix. Hence, the effect of TA pre-treatment on resin-dentin bond strength was assessed with the use of two bonding systems. Sound human molars were used and prepared according to each experimental design. The use of TA affected the properties of demineralized dentin by increasing its stiffness. TA treatment inhi bited the effect of collagenase digestion on dentin matrix, particularly for 10%TA and 20%TA. The TA-dentin matrix complex resulted in improved bond strength for both adhesive systems.

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“…Numerous studies have evaluated the effectiveness of inorganic and organic acids ( Table 1) for smear layer removal and found them to be highly effective, but too aggressive; their use has therefore not been universally adopted (136,140,154,(156)(157)(158)(159)(160)(161).…”

Section: Effect On Instrumented Surface and Smear Layermentioning

confidence: 99%