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Angle Orthod. 2014 Jul;84(4):634-41. doi: 10.2319/060613-433.1. Epub 2013 Dec 6.

Effects of different orthodontic adhesives and resin removal techniques on enamel color alteration.

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1
a  Private Practice, Ankara, Turkey.

Abstract

OBJECTIVE:

To investigate the color alterations in enamel following the use of different orthodontic bonding resins and adhesive residue-removal burs.

MATERIALS AND METHODS:

Metal brackets were bonded to extracted human premolars (n  =  175) by using an etch-and-rinse adhesive system, a self-etch adhesive system (SEP), or a resin-modified glass ionomer cement (RMGIC). After 24 hours of photoaging, the brackets were removed and the adhesive residue on the tooth surfaces was cleaned with either a tungsten carbide bur or a Stainbuster bur. Tooth colors were measured with a spectrophotometer at baseline, after adhesive removal, and after additional photoaging. Color evaluation was made, and color differences induced by photoaging were calculated. Statistical evaluation was made using the Kruskal-Wallis test and the Mann-Whitney U-test, with Bonferroni correction.

RESULTS:

All specimens showed discoloration at varying levels. The highest color change was observed in the etch-and-rinse adhesive/tungsten carbide bur group. When the etch-and-rinse and self-etch adhesives were used, adhesive-remnant removal with Stainbuster burs resulted in significantly lower discoloration. The type of bur did not affect the extent of enamel discoloration in the RMGIC group.

CONCLUSIONS:

Orthodontic treatment alters the original color of enamel, and both the adhesive system and the resin-removal methods are responsible for this change. When brackets are bonded with the etch-and-rinse system or the SEP, cleaning the adhesive residuals with Stainbuster burs is recommended for minimal change. RMGIC can be safely cleaned with tungsten carbide burs.

KEYWORDS:

Enamel color; Orthodontic treatment; Resin removal

PMID:
24313735
DOI:
10.2319/060613-433.1
[Indexed for MEDLINE]

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