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17.05.2019 | Original Article

The mineralizing effect of zinc oxide-modified hydroxyapatite-based sealer on radicular dentin

verfasst von: Manuel Toledano, Esther Muñoz-Soto, Fátima S. Aguilera, Estrella Osorio, Mayra C. Pérez-Álvarez, José AD. García-Menocal, Manuel Toledano-Osorio, Raquel Osorio

Erschienen in: Clinical Oral Investigations | Ausgabe 1/2020

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Abstract

Objective

The aim of this study was to evaluate the remineralization ability of three endodontic sealer materials at different root dentin regions.

Material and methods

Cervical, medial, and apical root dentin surfaces were treated with two experimental hydroxyapatite-based cements, containing sodium hydroxide (calcypatite) or zinc oxide (oxipatite); an epoxy resin-based canal sealer, AH Plus; and gutta-percha. Remineralization, at the inner and outer zones of dentin disk surfaces, was studied by nanohardness (Hi) and Raman analysis. Nanoroughness and collagen fibrils width measurements were performed. Numerical data, at 24 h or 12 m, were analyzed by ANOVA and Student-Newman-Keuls (p < 0.05).

Results

At the outer and inner zones of the cervical dentin treated with oxipatite, the highest Hi after 12 m of immersion was achieved. The same group showed the highest intensity of phosphate peak, markers for calcification and crystallinity. Nanoroughness was lower and fibril diameter was higher at the inner zone of the dentin treated with oxipatite. Dentin mineralization occurred in every region of the root dentin treated with oxipatite and calcypatite, especially at the inner zone of the dentin after 12 m.

Conclusions

Oxipatite reinforced the inner root zone at any third of the radicular dentin, by increasing both nanohardness and remineralization. When using calcypatite, the highest nanohardness was found at the apical third of the inner root dentin, but the lowest mechanical performance was obtained at the cervical and the medial thirds of the roots. Therefore, application of oxipatite as sealing cement of root canals is recommended.

Clinical relevance

Oxipatite, when used as an endodontic sealing material, strengthens radicular dentin.

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Titel: The mineralizing effect of zinc oxide-modified hydroxyapatite-based sealer on radicular dentin
verfasst von: Manuel Toledano
Esther Muñoz-Soto
Fátima S. Aguilera
Estrella Osorio
Mayra C. Pérez-Álvarez
José AD. García-Menocal
Manuel Toledano-Osorio
Raquel Osorio
Publikationsdatum: 17.05.2019
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 1/2020
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-019-02938-5

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The mineralizing effect of zinc oxide-modified hydroxyapatite-based sealer on radicular dentin

Abstract

Objective

Material and methods

Results

Conclusions

Clinical relevance

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Springer Medizin

Abstract

Objective

Material and methods

Results

Conclusions

Clinical relevance

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