The effects of primer precuring on the shear bond strength between gold alloy surfaces and metal brackets.

Abstract:

:The objective of this study was to investigate the effects of precuring of primer coated on bracket bases on the strength of bonds between metal brackets and gold alloy. Square type III gold alloy plates were sandblasted with 30 μm silicon dioxide. After silica coating, excessive particles were removed gently with air. Silane was then applied, and maxillary central incisor metal brackets were bonded to each conditioned alloy surface with Transbond XT. Half of the specimens were precured at the bracket base after primer coating and the other half was not precured before bonding to the alloy surface. After bracket positioning, samples were cured using a light emitting diode (LED) for 40 seconds. Shear bond strengths were tested and adhesive remnant index (ARI) was evaluated after 1 hour and 24 hours. The primer precuring and 24 hours group exhibited highest bond strength (12.53 MPa) and the no precuring and 1 hour group showed lowest bond strength (5.58 MPa). Precured groups showed lower ARI scores. Due to the shallow curing depth of LED light and inhibition of transillumination at the metal surface, primer precuring at the bracket base is required for secure bracket bonding on gold alloy surfaces using LED curing units.

journal_name

Eur J Orthod

authors

Shon WJ,Kim TW,Chung SH,Jung MH

doi

10.1093/ejo/cjq163

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

72-6

issue

1

eissn

0141-5387

issn

1460-2210

pii

cjq163

journal_volume

34

pub_type

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