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The European Journal of Orthodontics Advance Access originally published online on January 20, 2006
The European Journal of Orthodontics 2006 28(2):173-178; doi:10.1093/ejo/cji089
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© The Author 2006. Published by Oxford University Press on behalf of the European Orthodontics Society. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Self-etching primer and a non-rinse conditioner versus phosphoric acid: alternative methods for bonding brackets

Ascensión Vicente*, Luis A. Bravo* and Martín Romero**

Units of * Orthodontics and ** Pediatric Dentistry, Dental Clinic, University of Murcia, Spain

Address for correspondence Dr A. Vicente, Unit of Orthodontics, Dental Clinic, University of Murcia, Hospital Morales Meseguer, 2a planta, C/Marqués de los Vélez, s/n, 30008 Murcia, Spain, E-mail: ascenvi{at}um.es

The objective of this study was to evaluate the effectiveness of a self-etching primer, Transbond Plus Self Etching Primer (TSEP, 3M Unitek), and a non-rinse conditioner (NRC, Dentsply DeTrey) for bonding brackets, compared with the acid-etch technique. The brackets were bonded to extracted premolars using Transbond XT (3M Unitek). One of the following three conditioning protocols were used: (1) 37 per cent phosphoric acid (n = 25), (2) TSEP (n = 25), and (3) NRC (n = 15). Shear bond strength (SBS) was measured with a universal testing machine. The adhesive remaining after debonding was determined using image analysis equipment. Scanning electron microscope (SEM) observations were also carried out on 12 premolars to observe the enamel surfaces.

No significant differences were observed in SBS between the three groups (P = 0.56). TSEP and NRC left significantly less adhesive on the tooth than the traditional acid-etch technique (P = 0.004 and P = 0.000, respectively). NRC left significantly less adhesive than TSEP (P = 0.001). SEM observations showed that NRC produced a less aggressive etch pattern than TSEP, and that the etching effect of TSEP approximated that of phosphoric acid.


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Eur J Orthod, October 1, 2008; 30(5): 495 - 502.
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