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The competition between enamel and dentin adhesion within a cavity: An in vitro evaluation of class V restorations

Bortolotto, Tissiana ; Doudou, Wassila ; Kunzelmann, Karl ; Krejci, Ivo

In: Clinical Oral Investigations, 2012, vol. 16, no. 4, p. 1125-1135

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    Title
    • The competition between enamel and dentin adhesion within a cavity: An in vitro evaluation of class V restorations
    Author
    • Bortolotto, Tissiana. Division of Cariology and Endodontics, School of Dentistry, University of Geneva, Rue Barthelemy Menn, 19, CH-1205, Geneva, Switzerland
    • Doudou, Wassila. Division of Cariology and Endodontics, School of Dentistry, University of Geneva, Rue Barthelemy Menn, 19, CH-1205, Geneva, Switzerland
    • Kunzelmann, Karl. Department of Restorative Dentistry and Periodontology, Dental School of the Ludwig-Maximillians-University, Goethestrasse 70, 80336, Munich, Germany
    • Krejci, Ivo. Division of Cariology and Endodontics, School of Dentistry, University of Geneva, Rue Barthelemy Menn, 19, CH-1205, Geneva, Switzerland
    Document Type
    • Postprint
    OAI-PMH Identifier
    • oai:doc.rero.ch:310292
    Summary
    To gain more insight into the consequences of curing contraction within the tooth cavity, we assessed the margin behavior of 12 contemporary restorative systems in class V restorations with margins located on enamel and dentin after mechanical loading and water storage. Mixed class V cavities were prepared on extracted human molars and restored using five etch and rinse and seven self-etch adhesive systems with their corresponding composites. Marginal adaptation was evaluated by using a computer-assisted quantitative marginal analysis in a scanning electron microscope (SEM) on epoxy replicas before, after thermal and mechanical stressing and after 1year of water storage. The interactions of "testing conditions”, "adhesive-composite combination” and "tooth substrate” with "marginal adaptation” were evaluated by two-way ANOVA. Fatigue, stress and storage conditions had significant effects on the marginal adaptation. Only two groups (Optibond FL and G Bond) presented equal percentages of marginal adaptation on enamel and dentin; in the other groups, the rate of degradation was product dependent. All materials tested showed a distinct behavior on enamel and dentin. In addition to mechanical resistance and long-term stability, differences within materials also exist in their ability to simultaneously bond to enamel and dentin