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Related Experiment Videos

Interfacial gaps following ceramic inlay cementation vs direct composites.

Koji Iida1, Shigehisa Inokoshi, Norimasa Kurosaki

  • 1Tokyo Medical and Dental University, Faculty of Dentistry, Section of General Dentistry, Department of Comprehensive Oral Health Care, Division of Comprehensive Patient Care, Graduate School, Tokyo, Japan. iida.gend@tmd.ac.jp

Operative Dentistry
|July 25, 2003
PubMed
Summary

Ceramic inlays offer superior interfacial integrity in Class II restorations compared to direct resin composites, preventing enamel gaps. Flowable resin liners improve resin-dentin bonding but do not prevent enamel gaps with either restoration type.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials

Background:

  • Class II restorations are prone to marginal discrepancies.
  • Ceramic inlays and direct resin composites are common treatment options.
  • Flowable resin composites are sometimes used as liners to improve adaptation.

Purpose of the Study:

  • To compare the interfacial integrity of Class II ceramic inlay restorations versus direct resin composite restorations.
  • To evaluate the influence of a flowable resin composite liner on interfacial integrity.

Main Methods:

  • Class II DO cavities in mandibular molars were restored with either direct composite, ceramic inlays, or with a flowable resin liner prior to restoration.
  • Samples underwent thermocycling and were cross-sectioned.

Related Experiment Videos

  • Interfacial integrity at resin-enamel and resin-dentin interfaces was assessed using a scanning laser measurement microscope.

    • Main Results:

    • Ceramic inlays demonstrated significantly fewer interfacial gaps and cracks in enamel compared to direct resin composites (p=0.0002).
    • No significant differences in interfacial integrity were observed at the resin-dentin interface between inlay and direct composite groups.
    • Flowable resin liners significantly improved the gap-free resin-dentin interface for both restoration types (p=0.0233 & 0.0009) but did not affect enamel interfaces.

    Conclusions:

    • Ceramic inlay restorations provide superior marginal integrity at the enamel interface for Class II cavities.
    • Flowable resin composite liners enhance resin-dentin bonding but do not mitigate enamel gap formation.
    • Clinical recommendations should consider the material's impact on long-term restoration success and marginal seal.