Do metal alloy primers increase the bond strength of orthodontic tubes?
Braz. j. oral sci
;
18: e191406, jan.-dez. 2019. tab
Article
in English
| LILACS, BBO
| ID: biblio-1094951
ABSTRACT
Aim:
To evaluate the bond strength (BS) and failure mode of orthodontic tubes treated with different alloy primers at the interface among enamel, resin and orthodontic tubes.Methods:
Orthodontic tubes were bonded to the enamel of 80 bovine incisors with the orthodontic resin (Transbond XT, 3M Unitek). Prior to bonding, the tubes were chemically treated with (n=20) Metal/Zirconia Primer (MZ, Ivoclar), Scothbond Universal (SB, 3M Espe); Orthoprimer (OP, Morelli) or left untreated (Control - C). Specimens were submitted to 5,000 thermal cycles (5 and 55o C) to age the bonded interface. A shear BS test and failure modes were conducted, and the results were analyzed using one-way analysis of variance and Fisher's exact test, respectively.Results:
No differences were observed among groups regardless of the type of alloy primer used (p = 0.254). However, no differences were observed among the failure modes of the groups tested (p=0.694). The adhesive failure mode between the resin and enamel was the most prevalent failure (45%) for groups OP and C, whereas cohesive failure in the orthodontic resin was the most prevalent failure (40%) for groups SB and MZ.Conclusion:
Alloy primers were unable to increase the BS of the orthodontic tubes to enamel
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Orthodontics
/
Materials Testing
/
Dental Bonding
/
Shear Strength
Limits:
Animals
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2019
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Institute and Research Center São Leopoldo Mandic/BR
/
University of Campinas/BR
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