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Related Experiment Videos

Marginal adaptation of ceramic inserts after cementation.

M Ozcan1, P Pfeiffer, I Nergiz

  • 1Institute of Dentistry, Department of Biomaterials, Turku, Finland.

Operative Dentistry
|April 5, 2002
PubMed
Summary

Ceramic inserts offer advantages over composite resins for dental restorations. This study found that ceramic inserts prepared with ultrasonic tips provide clinically acceptable marginal adaptation, though differences exist between systems.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials Engineering

Background:

  • Composite resins have drawbacks like polymerization shrinkage, wear, and microleakage.
  • Ceramic inserts are explored as an alternative to overcome these limitations.
  • Ultrasonic tips are used for cavity preparation in dental restorations.

Purpose of the Study:

  • To evaluate the marginal adaptation of two approximal ceramic insert systems.
  • To compare ceramic insert performance after cementation in ultrasonically prepared cavities.
  • To assess cement thickness as an indicator of marginal adaptation.

Main Methods:

  • In vitro study on 20 intact molars with proximal cavities prepared using ultrasonic tips.
  • Placement of two ceramic insert systems (SONICSYS Inlay, SDS-Inlay) in mesial and distal sides.

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  • Cementation, thermocycling (5000 cycles, 5-55°C), and measurement of cement thickness under a light microscope (x150).

    • Main Results:

    • No significant difference in cement thickness between SONICSYS #2 (25 µm) and SDS inserts (26 µm).
    • Significant difference in cement thickness between SONICSYS #3 (34 µm) and SDS inserts (23 µm).
    • SDS system showed better marginal adaptation at buccal/lingual walls than pulpal floor; SONICSYS showed no difference.

    Conclusions:

    • Ceramic inserts prepared with ultrasonic tips offer clinically acceptable marginal quality.
    • The SDS system demonstrated superior marginal adaptation at specific locations compared to SONICSYS #3.
    • Further research may be needed to optimize specific ceramic insert systems for enhanced marginal integrity.