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Dent Mater. 2015 Jun;31(6):745-57. doi: 10.1016/j.dental.2015.03.016. Epub 2015 Apr 18.

Effect of Opalescence® bleaching gels on the elution of dental composite components.

Author information

1
Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich, Goethestr. 70, 80336 Munich, Germany; Walther-Straub-Institute of Pharmacology and Toxicology, Nussbaumstr. 26, 80336 Munich, Germany.
2
KU Leuven Biomat, Department of Oral Health Sciences KU Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.
3
Department of Operative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, 93042 Regensburg, Germany.
4
Department of Operative Dentistry and Periodontology, Albert-Ludwigs-University, 79106 Freiburg, Germany.
5
Department of Organic Chemistry, Ludwig-Maximilians-University of Munich, Butenandtstr. 5-13, House F, 81377 Munich, Germany.
6
Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich, Goethestr. 70, 80336 Munich, Germany.
7
Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich, Goethestr. 70, 80336 Munich, Germany; Walther-Straub-Institute of Pharmacology and Toxicology, Nussbaumstr. 26, 80336 Munich, Germany. Electronic address: christof.hoegg@lrz.uni-muenchen.de.

Abstract

OBJECTIVES:

Bleaching treatments can affect on the polymer network of dental composites. This study was performed to evaluate the influence of different bleaching treatments on the elution of composite components.

METHODS:

The composites Tetric EvoCeram(®), CLEARFIL™ AP-X, Tetric EvoFlow(®), Filtek™ Supreme XT, Ceram X(®) mono+, Admira and Filtek™ Silorane were treated with the bleaching gels Opalescence PF 15% (PF 15%) for 5h and PF 35% (PF 35%) for 30 min and then stored in methanol and water for 24h and 7 d. The eluates were analyzed by gas chromatography/mass spectrometry (GC/MS). Unbleached specimens were used as control group.

RESULTS:

A total of 16 different elutable substances have been identified from the investigated composites after bleaching-treatment. Six of them were methacrylates: 1,10-decandioldimethacrylate (DDDMA), 1,12-dodekandioldimethacrylate (DODDMA), ethylenglycoldimethacrylate (EGDMA), 2-hydroxyethylmethacrylate (HEMA), triethylenglycoldimethacrylate (TEGDMA) and urethandimethacrylate (UDMA). Compared with the unbleached controls the composites Tetric EvoCeram(®), CLEARFIL™ AP-X and Tetric EvoFlow(®) showed a reduced elution of UDMA, TEGDMA and HEMA after bleaching-treatment. Compared with the unbleached controls an increase elution of UDMA, DMABEE, BPA and TEGDMA for the composites Filtek™ Supreme XT, Ceram X(®) mono+, Admira and Filtek™ Silorane after bleaching-treatment has been detected. The highest concentration of UDMA was 0.01 mmol/l (Tetric EvoCeram(®), water, 24h, controls), the highest concentration of TEGDMA was 0.28 mmol/l (CLEARFIL™ AP-X, water, 7 d, controls), the highest concentration of HEMA was 0.74 mmol/l (Tetric EvoFlow(®), methanol, 7 d, PF 35%), the highest concentration of DMABEE was 0.10 mmol/l (Ceram X(®) mono+, water, 7 d, PF 35%) and the highest concentration of BPA was 0.01 mmol/l (Admira, methanol, 7 d, controls).

SIGNIFICANCE:

Bleaching treatments can lead to a reduced or an increased elution of substances from the dental composites.

KEYWORDS:

Bleaching; Comonomer; Dental composite; Elution; Peroxide; Polymer network

PMID:
25900623
DOI:
10.1016/j.dental.2015.03.016
[Indexed for MEDLINE]

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