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Influence of Bioactive Glass Incorporation in Resin Adhesives of Orthodontic Brackets on Adhesion Properties and Calcium Release.

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Updated: Oct 8, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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Bonding Performance for Repairs Using Bulk Fill and Conventional Methacrylate Composites.

Janaina Galvão Benzi1, César Rogério Pucci2, Maiara Rodrigues Freitas1

  • 1Department of Restorative Dentistry, School of Dentistry, Taubaté University, UNITAU, Department of Dentistry, Taubaté, Brazil.

International Journal of Dentistry
|December 27, 2021
PubMed
Summary

Bulk fill composites show superior repair bond strength when using the same material, with sandblasting and abrasion treatments enhancing performance. Conventional composites were unaffected by material or surface treatment.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials Engineering

Background:

  • Dental composite restorations require durable repairs to maintain function and aesthetics.
  • Assessing the bond strength of repair materials is crucial for predicting restoration longevity.
  • Bulk fill and conventional resin composites differ in handling and curing properties, potentially impacting repair outcomes.

Purpose of the Study:

  • To compare the bond strength of repaired bulk fill and conventional resin composites.
  • To evaluate the influence of different surface treatments (no treatment, abrasion, sandblasting) on repair bond strength.
  • To determine if using the same or a different composite material for repair affects bond strength.

Main Methods:

  • Truncated cone specimens of bulk fill (Filtek One) and conventional resin (Filtek Z250) composites were prepared.
  • Artificial aging was performed, followed by surface treatments: no treatment (NT), diamond abrasion (Abr), and aluminum oxide sandblasting (sand).
  • Repairs were made using the same or different composite types, followed by adhesive application and tensile bond strength testing.

Main Results:

  • Aged bulk fill composite repairs showed significantly higher bond strength when the same bulk fill material was used for repair compared to using a conventional composite.
  • Sandblasting and abrasion treatments significantly improved bond strength for bulk fill composite repairs compared to the control (no treatment).
  • Aged conventional composite repairs exhibited no significant differences in bond strength regardless of the repair material or surface treatment applied.

Conclusions:

  • Bulk fill resin composites demonstrate superior repair performance when the same material is used, with mechanical surface treatments enhancing bond strength.
  • Conventional resin composites are less sensitive to the choice of repair material and surface treatment methods.
  • These findings inform clinical decisions regarding the most effective strategies for repairing composite restorations.