Journal Article

Shear bond strength of a new polycarbonate bracket—an <i>in vitro</i> study with 14 adhesives

Nilgün Akin-Nergiz, Ibrahim Nergiz, Kerstin Behlfelt and Ursula Platzer

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 18, issue 3, pages 295-301
Published in print June 1996 | ISSN: 0141-5387
e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/18.3.295
Shear bond strength of a new polycarbonate bracket—an in vitro study with 14 adhesives

More Like This

Show all results sharing this subject:

  • Restorative Dentistry and Orthodontics

GO

Show Summary Details

Preview

Shear bond strength and failure location were used to evaluate the effectiveness of plastic bracket primers for bonding diacrylate adhesives on a new fibre-reinforced polycarbonate bracket.

Maxillary incisor polycarbonate and mesh-based brackets as control were bonded to human incisors with 14 different adhesives (four filled diacrylate two-paste, six diacrylate one-step and four powder-liquid acrylic adhesives), and after thermo-cycling for 2000 cycles between 5° and 55°C, tested in shear. A non-parametric test (Mann-Whitney U test) was used to compare the shear bond strength of the polycarbonate brackets with the mesh based brackets and a One-way test (according to Scheffe) to compare the shear bond strength of different adhesives. The following conclusions can be made:

Seven of the 14 adhesives used in this study with both types of brackets demonstrated adequate shear bond strength values for the clinical application. The exceptions were: Achieve Mix, No-Mix:30 Silkon, Lee Insta-Bond, Ortho-Loc and Bond-Eze, all with too low a shear bond strength for one or both types of brackets, and finally Quasar, which used with the plastic brackets sometimes caused enamel fractures, due to a very high bond strength.

The adhesives with their own plastic primer demonstrated higher bond strength values than those without plastic primer, and two-paste adhesives used with plastic primer displayed a higher bond strength than the other adhesives.

Generally, the shear bond strength values of the one-step adhesives were lower compared with the two-paste adhesives.

The liquid-powder adhesives demonstrated very different values for bond strength.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.