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Related Experiment Videos

Adhesion of elastomeric impression materials to trays

B Bindra1, J R Heath

  • 1Turner Dental School, University of Manchester, U.K.

Journal of Oral Rehabilitation
|January 1, 1997
PubMed
Summary

Adhesives significantly improve bonding between dental impression materials and tray resins. Visible light-cured (VLC) tray resin showed superior adhesion compared to acrylic resin, crucial for optimal clinical performance.

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Area of Science:

  • Materials Science
  • Biomaterials Science
  • Dental Materials

Background:

  • Dental impression materials are critical for prosthodontic restorations.
  • Ensuring strong adhesion between impression materials and tray materials is essential for accuracy.
  • Previous research has explored various bonding strategies, but optimal combinations require further investigation.

Purpose of the Study:

  • To determine the tensile and shear adhesive bond strengths of specific silicone and polyether impression materials to different tray materials.
  • To evaluate the impact of adhesive application on bond strength.
  • To identify the most effective combinations for enhanced clinical performance.

Main Methods:

  • Testing the bond strengths of two addition cured silicones (Provil, Express) and one polyether (Impregum) to brass, poly(methylmethacrylate) (PMMA), and visible light-cured (VLC) tray resin.
  • Utilizing adhesives to assess their effect on bond strength.
  • Measuring tensile and shear forces to quantify adhesion.

Main Results:

  • Adhesive application significantly increased bond strengths across all material combinations.
  • Provil and Express silicones showed strongest adhesion to brass.
  • The Impregum-polyether and VLC tray resin combination yielded the highest overall bond strength.
  • VLC resin demonstrated superior adhesion compared to PMMA acrylic resin.

Conclusions:

  • Adhesive use is vital for maximizing bond strength between impression and tray materials.
  • Visible light-cured (VLC) tray resins offer superior adhesion compared to traditional acrylic resins.
  • Selecting the optimal impression material, adhesive, and tray material combination is crucial for achieving the highest bond strength and ensuring superior clinical outcomes.

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