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01-01-2017 | Original Article

Effect of indomethacin-loaded nanocapsules incorporation in a dentin adhesive resin

Authors: Bruna Genari, Vicente Castelo Branco Leitune, Denise Soledade Jornada, Melissa Camassola, Adriana Raffin Pohlmann, Sílvia Stanisçuaski Guterres, Susana Maria Werner Samuel, Fabrício Mezzomo Collares

Published in: Clinical Oral Investigations | Issue 1/2017

Abstract

Objectives

The aim of this study was to produce indomethacin-loaded nanocapsules (IndOH-NCs) and evaluate the influence of their incorporation into an adhesive resin.

Materials and Methods

Indomethacin was encapsulated by the deposition of preformed polymer. IndOH-NCs were characterized by laser diffractometry, Fourier transformed infrared spectrometry, transmission electron microscopy (TEM), scanning electron microscopy, high-performance liquid chromatography (HPLC), and MTT assay. Nanocapsules (NCs) were incorporated into an adhesive in concentrations of 1, 2, 5, and 10 %. The addition was visualized by TEM and drug release was evaluated by HPLC until 120 h of immersion in simulated body fluid (SBF). Drug diffusion through dentin was tested using a Franz diffusion cell apparatus and quantified by HPLC. The degree of conversion (DC), softening in ethanol, and microtensile bond strength (μTBS) were evaluated to determine whether the nanocapsules influenced the adhesive. Data were analyzed using one-way ANOVA and Tukey’s post hoc test for DC, softening in ethanol, μTBS, and cytotoxicity, and paired t test for comparison between the initial and final Knoop microhardness.

Results

IndOH-NCs, with a spherical shape and a mean diameter of 165 nm, were incorporated into an adhesive. Indomethacin content was 7 mg drug/g powder. IndOH-NCs maintained high cell viability. At 120 h, an amount of 13.83 % of indomethacin was released, and after 7 days, 7.07 % of this drug was diffused through dentin for an adhesive containing 10 % of nanocapsules. No alteration in the DC, softening in ethanol, and μTBS resulted from NC addition.

Conclusions

IndOH-NCs may be incorporated into adhesive systems, without compromising properties, to add an anti-inflammatory drug controlled release for restorative procedures in deep cavities.

Clinical significance

Here is the first step toward the goal of providing agents to act at an inflammatory process of pulp tissue through dental adhesives via encapsulation of drug.

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Title: Effect of indomethacin-loaded nanocapsules incorporation in a dentin adhesive resin
Authors: Bruna Genari
Vicente Castelo Branco Leitune
Denise Soledade Jornada
Melissa Camassola
Adriana Raffin Pohlmann
Sílvia Stanisçuaski Guterres
Susana Maria Werner Samuel
Fabrício Mezzomo Collares
Publication date: 01-01-2017
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 1/2017
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-016-1810-7

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Effect of indomethacin-loaded nanocapsules incorporation in a dentin adhesive resin

Abstract

Objectives

Materials and Methods

Results

Conclusions

Clinical significance

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Objectives

Materials and Methods

Results

Conclusions

Clinical significance

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