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. 2017 Summer;12(3):366-370.
doi: 10.22037/iej.v12i3.16421.

Comparison of the Penetration Depth of Conventional and Nano-Particle Calcium Hydroxide into Dentinal Tubules

Vahid Zand  1 , Hadi Mokhtari  1 , Aila Hasani  2 , Golchin Jabbari  2
Affiliations

Comparison of the Penetration Depth of Conventional and Nano-Particle Calcium Hydroxide into Dentinal Tubules

Vahid Zand et al. Iran Endod J. 2017 Summer.

Abstract

Introduction: The aim of this in vitro study was to evaluate and compare the penetration depth of conventional (CH) and nano-particle calcium hydroxide (NCH) into dentinal tubules.

Methods and materials: Ninety human single-rooted teeth were instrumented by RaCe rotary system and after chemomechanical preparation were randomly divided in two equal groups (n=45). In the first group conventional CH and in the other NCH was used as intracanal medicament. After 2 weeks of incubation all roots were intentionally split at longitudinal axis and prepared for scanning electron microscope (SEM) observation. Three zones of each root, coronal, middle and apical were examined under SEM and the maximum penetration depth of the dressing material into dentinal tubules was recorded for each zone. Data were analyzed using the independent sample t test and the level of significance was set at 0.05.

Results: In all of the three zones, NCH group had greater penetration depth than CH (P<0.001). In both groups the penetration depth increased from the apical section to the coronal.

Conclusion: The depth of penetration of nano-particle calcium hydroxide into the dentinal tubules was significantly higher than that of conventional calcium hydroxide. The lowest penetration depth was observed in apical zone in both groups.

Keywords: Calcium Hydroxide; Dentinal Tubules; Nano Particle; Penetration Depth; Tubular Penetration.

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Conflict of interest statement

‘None declared’.

Figures

Figure 1.
Figure 1.
Scanning electron microscope images of experimental groups: A and B) Nano-particle calcium hydroxide in dentinal tubules; C and D) Conventional calcium hydroxide in dentinal tubules; E and F) Conventional calcium hydroxide particles stuck at the orifice of dentinal tubules, because of their rectangular shape
Figure 2
Figure 2
Zone-wise penetration depth of conventional and nano calcium hydroxide
See this image and copyright information in PMC

References

    1. Donyavi Z, Ghahari P, Esmaeilzadeh M, Kharazifard M, Yousefi-Mashouf R. Antibacterial Efficacy of Calcium Hydroxide and Chlorhexidine Mixture for Treatment of Teeth with Primary Endodontic Lesions: A Randomized Clinical Trial. Iran Endod J. 2016;11(4):255–60. - PMC - PubMed
    1. Nair P. On the causes of persistent apical periodontitis: a review. Int Endod J. 2006;39(4):249–81. - PubMed
    1. Fava L, Saunders W. Calcium hydroxide pastes: classification and clinical indications. Int Endod J. 1999;32(4):257–82. - PubMed
    1. Tabrizizadeh M, Rasti M, Ayatollahi F, Mossadegh MH, Zandi H, Dehghan F, Mousavi Z. Antimicrobial Activity of Calcium Hydroxide and Betamethasone on Enterococcus faecalis; An in vitro Assessment. Iran Endod J. 2015;10(3):184–7. - PMC - PubMed
    1. Byström A, Claesson R, Sundqvist G. The antibacterial effect of camphorated paramonochlorophenol, camphorated phenol and calcium hydroxide in the treatment of infected root canals. Dent Traumatol. 1985;1(5):170–5. - PubMed

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