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Published on: July 4, 2018
Behavior of failed bonded interfaces under in vitro cariogenic challenge.
Anelise F Montagner1, Niek J M Opdam2, Jan L Ruben2
1School of Dentistry, Department of Restorative Dentistry, Federal University of Pelotas, Gonçalves Chaves 457, 96015-560 Pelotas, RS, Brazil; College of Dental Sciences, Department of Preventive and Restorative Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands.
Secondary caries development varies significantly based on composite-dentin interface integrity. Failed bonded interfaces showed different demineralization compared to never-bonded ones, impacting restorative treatment outcomes.
Area of Science:
- Dental Materials Science
- Cariology
- Restorative Dentistry
Background:
- Secondary caries remains a primary cause of dental restoration failure.
- Understanding demineralization at composite-dentin interfaces is crucial for improving restoration longevity.
Purpose of the Study:
- To compare dentin wall caries development in vitro across various composite-dentin interfaces.
- To evaluate the influence of adhesive system type and aging on caries progression.
Main Methods:
- Dentin samples were restored with composite resin using etch-and-rinse or self-etch adhesives.
- Interfaces were created as failed bonded (aged/fractured) or non-bonded (with/without adhesive).
- Samples underwent a 10-day lactic acid caries model with gap manipulation, followed by microradiography to assess lesion depth and mineral loss.
Main Results:
- Significant differences in caries development were observed among interface types (p<0.001).
- Non-bonded interfaces without adhesive showed the deepest lesions; those with adhesive showed less depth than failed bonded groups.
- Self-etch adhesives on non-bonded dentin led to more severe lesions; mechanical loading aging exacerbated lesion depth.
Conclusions:
- Composite-dentin interface integrity critically influences secondary caries development.
- Restorative treatment and aging protocols alter dentin susceptibility to demineralization.
- The findings highlight the importance of interface quality in preventing recurrent caries.
