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No correlation between two methodological approaches applied to evaluate cervical margin relocation.

Jelena Juloski1,2, Serhat KÖken1, Marco Ferrari1

  • 1Department of Medical Biotechnologies, University of Siena.

Dental Materials Journal
|April 17, 2020
PubMed
Summary
This summary is machine-generated.

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The cervical margin relocation (CMR) technique showed no significant correlation between microleakage and SEM integrity. Margins without CMR had less leakage than those with CMR, with Group 2 performing better than Group 1.

Area of Science:

  • Restorative Dentistry
  • Dental Materials Science
  • Biomaterials

Background:

  • Gingival margin quality is crucial for restoration longevity.
  • The cervical margin relocation (CMR) technique aims to improve supragingival margin placement.
  • Evaluating the reliability of in vitro methods for assessing marginal integrity is essential.

Purpose of the Study:

  • To assess the quality of gingival margins created by the CMR technique using different adhesive/composite systems.
  • To compare the consistency of microleakage tests and scanning electron microscopy (SEM) in evaluating marginal integrity.
  • To investigate the influence of CMR on marginal seal and integrity.

Main Methods:

  • Preparation of mesio-occlusal-distal cavities with subgingival proximal margins.
Keywords:
AdhesionCervical margin relocationCompositeMarginal qualityMarginal seal

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  • Application of CMR with either total-etch adhesive/flowable composite (Group 1) or universal adhesive/bulk-fill flowable composite (Group 2).
  • Restoration with CAD/CAM overlays and evaluation via microleakage testing and SEM analysis of epoxy resin replicas.

    • Main Results:

    • No significant correlation was found between microleakage scores and SEM-assessed marginal integrity at CMR margins.
    • Margins without CMR exhibited significantly lower microleakage compared to margins with CMR.
    • Group 2 (universal adhesive/bulk-fill composite) demonstrated lower microleakage than Group 1, with no significant difference in SEM integrity between CMR groups.

    Conclusions:

    • The CMR technique's effectiveness in improving marginal seal requires further investigation.
    • Microleakage and SEM evaluations may provide inconsistent results for CMR margins.
    • Material selection, specifically universal adhesives and bulk-fill composites, may influence microleakage outcomes in CMR procedures.