Physical and chemical mechanisms involved in adhesion of orthodontic bonding composites: in vitro evaluations

R. Condò; G. Mampieri; A. Cioffi; M. E. Cataldi; I. Frustaci; A. Giancotti; V. Campanella; V. Mussi; A. Convertino; L. Maiolo; G. Pasquantonio

doi:10.1186/s12903-021-01715-9

BMC Oral Health (Jul 2021)

Physical and chemical mechanisms involved in adhesion of orthodontic bonding composites: in vitro evaluations

R. Condò,
G. Mampieri,
A. Cioffi,
M. E. Cataldi,
I. Frustaci,
A. Giancotti,
V. Campanella,
V. Mussi,
A. Convertino,
L. Maiolo,
G. Pasquantonio

Affiliations

R. Condò: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”
G. Mampieri: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”
A. Cioffi: PhD in Materials for Health, Environment and Energy, University of Rome “Tor Vergata”
M. E. Cataldi: PhD in Materials for Health, Environment and Energy, University of Rome “Tor Vergata”
I. Frustaci: PhD in Materials for Health, Environment and Energy, University of Rome “Tor Vergata”
A. Giancotti: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”
V. Campanella: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”
V. Mussi: Institute for Microelectronics and Microsystems - National Research Council, Unit of Rome
A. Convertino: Institute for Microelectronics and Microsystems - National Research Council, Unit of Rome
L. Maiolo: Institute for Microelectronics and Microsystems - National Research Council, Unit of Rome
G. Pasquantonio: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”

DOI: https://doi.org/10.1186/s12903-021-01715-9
Journal volume & issue: Vol. 21, no. 1
pp. 1 – 12

Abstract

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Abstract Background Bond strength of orthodontic composite is strongly influenced by molecular and structural mechanisms. Aim of this in vitro study was to compare bond strength of light-cure orthodontic composites by measuring debonding forces and evaluating locations of bond failure. Investigations on chemical compositions clarified adhesive behaviors and abilities, exploring effects of ageing processes in this junction materials. Methods Twelve enamel discs, from human premolars, were randomly coupled to one orthodontic adhesive system (Transbond XT™ 3 M UNITEK, USA, Light-Cure Orthodontic Paste, LEONE, Italy and Bisco Ortho Bracket Paste LC, BISCO, Illinois) and underwent to Shear Bond Strength test. Metallic brackets were bonded to twenty-seven human premolar, with one of the adhesive systems, to quantify, at FE-SEM magnifications, after debonding, the residual material on enamel and bracket base surfaces. Raman Spectroscopy analysis was performed on eight discs of each composites to investigate on chemical compositions, before and after accelerated aging procedures in human saliva and sugary drink. Results Orthodontic adhesive systems showed similar strength of adhesion to enamel. The breakage of adhesive-adherent bond occurs in TXT at enamel-adhesive interface while in Bisco and Leone at adhesive-bracket interface. Accelerated in vitro aging demonstrated good physical–chemical stability for all composites, Bisco only, was weakly contaminated with respect to the other materials. Conclusion A similar, clinically adequate and acceptable bond strength to enamel for debonding maneuvers was recorded in all orthodontic adhesive systems under examination. No significant chemical alterations are recorded, even in highly critical situations, not altering the initial mechanical properties of materials.

Published in BMC Oral Health

ISSN: 1472-6831 (Online)
Publisher: BMC
Country of publisher: United Kingdom
LCC subjects: Medicine: Dentistry
Website: http://bmcoralhealth.biomedcentral.com

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Abstract

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