HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by Tay, F.R. Articles by King, N.M. Search for Related Content PubMed PubMed Citation Articles by Tay, F.R. Articles by King, N.M.

Osmotic Blistering in Enamel Bonded with One-step Self-etch Adhesives

¹ Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Hong Kong SAR, China;
² Department of Dental Science, University of Bologna, Italy; and
³ Department of Oral Biology and Maxillofacial Pathology, Medical College of Georgia, Augusta, GA, USA;

^* corresponding author, kfctay{at}hknet.com

One-step self-etch adhesives behave as permeable membranes after polymerization, permitting water to move through the cured adhesives. We hypothesize that osmotic blistering occurs in bonded enamel when these adhesives are used without composite coupling. Tooth surfaces from extracted human premolars were bonded with 5 one-step self-etch adhesives. They were immersed in distilled water or 4.8 M CaCl₂, and examined by stereomicroscopy, field-emission/environmental SEM, and TEM. Water blisters were observed in bonded enamel but not in bonded dentin when specimens were immersed in water. They collapsed when water was subsequently replaced with CaCl₂. Blisters were absent from enamel in specimens that were immersed in CaCl₂ only. Water trees were identified from adhesive-enamel interfaces. Osmotic blistering in enamel is probably caused by the low water permeability of enamel. This creates an osmotic gradient between the bonded enamel and the external environment, causing water sorption into the interface.

KEY WORDS: osmosis • water blisters • enamel • self-etch • water trees

This article has been cited by other articles:

				K.L. Van Landuyt, J. Snauwaert, J. De Munck, E. Coutinho, A. Poitevin, Y. Yoshida, K. Suzuki, P. Lambrechts, and B. Van Meerbeek Origin of Interfacial Droplets with One-step Adhesives J. Dent. Res., August 1, 2007; 86(8): 739 - 744. [Abstract] [Full Text] [PDF]