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Publication year
2016Source
Dental Materials, 32, 5, (2016), pp. 668-75ISSN
Publication type
Article / Letter to editor

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Organization
Dentistry
Journal title
Dental Materials
Volume
vol. 32
Issue
iss. 5
Page start
p. 668
Page end
p. 75
Subject
Radboudumc 10: Reconstructive and regenerative medicine RIHS: Radboud Institute for Health SciencesAbstract
OBJECTIVE: This in vitro study aimed to compare dentin wall caries development at different composite-dentin interfaces. METHODS: Dentin samples (10.4mm(2)) were restored with composite resin using two adhesive systems (etch-and-rinse and self-etch techniques). Different composite-dentin interfaces with gaps were produced: (a) failed bonded, which were fractured at interface after being submitted to aging protocols (no aging, mechanical loading or water storage); (b) non-bonded interfaces, both without any adhesive material or with adhesive material applied only on the dentin. Adhesively fractured and non-bonded samples were subjected to a lactic acid gel (pH=5) caries model with a continuous opening/closing movement of the interfacial gap for 10 days. Transverse wavelength-independent microradiographs were taken, and lesion depth and mineral loss were measured. Data were analyzed with linear mixed-effects regression models. RESULTS: Caries development differed among the composite-dentin interfaces (p<0.001). The non-bonded interface with adhesive material on the dentin showed less lesion depth than the failed bonded groups, while the non-bonded interface without adhesive on dentin showed the deepest wall lesions. Difference between the adhesive systems was observed only in the non-bonded groups (p=0.003), with the self-etch adhesive applied on the dentin showing more severe lesions. Samples broken after mechanical loading aging showed deeper lesions than those broken after water storage (p<0.001). SIGNIFICANCE: Composite-dentin interfaces failed after aging presented different demineralization from interfaces that were never bonded, indicating that the restorative treatment changes the tissue in a way relevant to secondary caries development.
This item appears in the following Collection(s)
- Academic publications [227727]
- Electronic publications [107311]
- Faculty of Medical Sciences [86204]
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