The addition of carbon nanotubes to orthodontic adhesives: an in vitro study


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Australasian Orthodontic Journal

Australian Society of Orthodontists

Subject: Dentistry, Orthodontics & Medicine


ISSN: 2207-7472
eISSN: 2207-7480





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VOLUME 33 , ISSUE 1 (May 2017) > List of articles

The addition of carbon nanotubes to orthodontic adhesives: an in vitro study

Paulo Guilherme Bittencourt Marchi * / Felipe de Brum Ricardi / Maurício Matté Zanini / Paulo Rodrigo Stival Bittencourt / Mauro Carlos Agner Busato

Citation Information : Australasian Orthodontic Journal. Volume 33, Issue 1, Pages 57-63, DOI:

License : (CC BY 4.0)

Published Online: 30-July-2021



Objective: The evolution of adhesive dentistry and the addition of nanoparticles has heralded an improvement in the mechanical properties of adhesives. Thus, the aim of the present study was to evaluate the effects produced by carbon nanotubes (CN) added to two adhesives used for indirect bonding by an examination of the shear bond strength (SBS) and location of bond failure.

Methods: One hundred and sixty bovine incisors were randomly divided into eight groups (N = 20): (1) indirect bonding with Sondhi adhesive; (2), (3) and (4) indirect bonding with Sondhi adhesive into which CN at 0.5%, 0.25% and 0.05% concentrations were incorporated; (5) indirect bonding with Concise adhesive; (6), (7) and (8) indirect bonding with Concise adhesive into which CN at 0.5%, 0.25% and 0.05% concentrations were incorporated. Following etching with 37% phosphoric acid and the placement of brackets, maximum shear bond strength (SBS) was measured with a mechanical testing machine. The location of bond failure was evaluated using the Adhesive Remnant Index (ARI). The SBS between groups and ARI scores were statistically analysed (p < 0.05).

Results: There was no statistical difference (p > 0.05) in SBS or ARI.

Conclusions: CN addition to Concise and Sondhi adhesives did not influence the SBS and the ARI of the brackets. Therefore, in the conditions of this experiment, there was no benefit in the addition of CN to orthodontic adhesives.

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