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Journal of Dental Research
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Biomaterials & Bioengineering

In vivo Fluid Movement through Dentin Adhesives in Endodontically Treated Teeth

S. Chersoni1, G.L. Acquaviva2, C. Prati2, M. Ferrari1, S. Grandini1, D.H. Pashley3 and F.R. Tay4,*

1 Department of Restorative Dentistry and Dental Materials, University of Siena, Italy;
2 Department of Dental Sciences, University of Bologna, Italy;
3 Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, USA; and
4 Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Prince Philip Dental Hospital, University of Hong Kong, 34 Hospital Road, Pokfulam, Hong Kong, SAR, China;

Correspondence: * corresponding author, kfctay{at}netvigator.com

Fluid transudation through simplified dentin adhesives can occur in bonded vital crown dentin, since these adhesives behave as permeable membranes after polymerization. The effect of adhesive permeability in endodontically treated teeth is unknown. This study examined the hypothesis that in vivo fluid movement through simplified adhesives occurs when they are applied to root canals. Dowel spaces were prepared in endodontically treated teeth with single root canals. Six adhesives were applied to the intra-radicular dentin of canal walls. Impressions were obtained with polyvinyl siloxane, and replicas were fabricated with the use of polyether impression material. Replica hemisections were gold-coated for SEM examination. Fluid transudation was evident on the adhesive surfaces of all simplified total-etch and self-etch adhesives. Conversely, most of the specimens bonded with the control three-step total-etch adhesive were devoid of fluid droplets. Permeability of simplified adhesives results in water movement, even in root-treated dentin. This may adversely affect the coupling of auto-/dual-cured resin cements.

Key Words: adhesive permeability • simplified adhesives • root canal • fluid transudation

Journal of Dental Research, Vol. 84, No. 3, 223-227 (2005)
DOI: 10.1177/154405910508400303
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