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RESEARCH REPORT |
1 Department of Dental Science, University of Bologna, Italy;
2 Department of Anatomical Science, University of Bologna, Italy;
3 Department of Dental Materials and Restorative Dentistry, Policlinico ‘Le Scotte’, University of Siena, Italy;
4 Pediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Hong Kong SAR, China;
5 College and Hospital of Stomatology, Wuhan University, China;
6 Department of Surgical Sciences, University of Trieste, Italy; and
7 Department of Oral Biology and Maxillofacial Pathology, Medical College of Georgia, Augusta, GA, USA;
* corresponding author, kfctay{at}netvigator.com
Adhesive dentistry should effectively restore the peripheral seal of dentin after enamel removal. We hypothesize that non-rinsing, simplified, one-step self-etch adhesives are effective for minimizing dentin permeability after tooth preparation procedures. Crown preparations in vital human teeth were sealed with Adper Prompt, Xeno III, iBond, or One-Up Bond F. Epoxy resin replicas were produced from polyvinyl siloxane impressions for SEM examination. Dentin surfaces from extracted human teeth were bonded with these adhesives and connected to a fluid-transport model for permeability measurements and TEM examination. Dentinal fluid droplets were observed from adhesive surfaces in resin replicas of in vivo specimens. In vitro fluid conductance of dentin bonded with one-step self-etch adhesives was either similar to or greater than that of smear-layer-covered dentin. TEM revealed water trees within the adhesives that facilitate water movement across the polymerized, highly permeable adhesives. Both in vitro and in vivo results did not support the proposed hypothesis.
KEY WORDS: In vivo • resin replica • permeability • one-step self-etch • water tree
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