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Morphological characterization of the tooth/adhesive interface.

Sandra Kiss Moura1, José Fortunato Ferreira Santos, Rafael Yagüe Ballester

  • 1Department of Dental Materials, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.

Brazilian Dental Journal
|January 31, 2007
PubMed
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Scanning electron microscopy revealed that the tooth/adhesive interface morphology in MOD restorations differs based on the adhesive system and location. The study accepted the hypothesis that interface characteristics vary across different areas and systems.

Area of Science:

  • Dentistry
  • Dental Materials Science
  • Biomaterials

Background:

  • The integrity of the tooth/adhesive interface is crucial for the longevity of dental restorations.
  • Understanding the morphological characteristics of this interface is essential for improving adhesive dentistry techniques.
  • Different adhesive systems possess unique properties that may influence interfacial morphology.

Purpose of the Study:

  • To evaluate the morphological characteristics of the tooth/adhesive interface in MOD (Mutilated-Occlusal-Distal) restorations.
  • To compare the interface morphology produced by three different adhesive systems using scanning electron microscopy (SEM).
  • To test the hypothesis that interface morphology varies in different areas of MOD restorations for the evaluated adhesive systems.

Main Methods:

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  • MOD cavities were prepared in 12 human third molars.
  • Restorations were placed using Filtek Z250 composite resin and one of three adhesive systems: Experimental ABF, Clearfil SE Bond (self-etching), or Single Bond (etch-and-rinse).
  • Teeth were stored for 24 hours at 37°C in distilled water, then sectioned and analyzed using SEM.

Main Results:

  • The interfacial morphology demonstrated variability depending on the specific adhesive system used.
  • Significant differences in morphology were observed across different evaluated areas within the MOD restorations.
  • The observed interface characteristics were influenced by both the dental substrate and the properties of the adhesive systems.

Conclusions:

  • The morphology of the tooth/adhesive interface in MOD restorations is influenced by the choice of adhesive system.
  • The location within the restoration also affects the interfacial morphology.
  • The study accepted the null hypothesis, indicating that interface morphology reflects the interplay between dental substrate and adhesive system characteristics.