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Post-surface conditioning improves interfacial adhesion in post/core restorations.

Francesca Monticelli1, Manuel Toledano, Franklin R Tay

  • 1Department of Restorative Dentistry and Dental Materials, University of Siena, Policlinico Le Scotte, Viale Bracci, 53100 Siena, Italy. francescamonticelli@supereva.it

Dental Materials : Official Publication of the Academy of Dental Materials
|November 18, 2005
PubMed
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Different post-surface etching methods significantly improve fiber post and composite core bond strength. Potassium permanganate treatment notably enhanced microtensile bond strength, optimizing micromechanical and chemical retention for dental restorations.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Fiber posts are widely used in dental restorations.
  • Ensuring strong adhesion between fiber posts and composite core materials is crucial for restoration longevity.
  • Surface treatments can influence the interfacial bond strength.

Purpose of the Study:

  • To evaluate the impact of various post-surface etching procedures on the microtensile bond strength between fiber posts and composite core materials.
  • To compare the effectiveness of different chemical surface treatments on enhancing bond strength.

Main Methods:

  • Sixty fiber posts underwent ten different surface treatments, including potassium permanganate etching, hydrogen peroxide, sodium ethoxide, and silanization (control).

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  • Two composite materials (Core Paste XP and Unifil Flow) were used for core build-ups.
  • Microtensile bond strength was assessed, and interfacial morphology was examined using scanning electron microscopy (SEM).

    • Main Results:

    • SEM revealed an interpenetrating adhesion network between treated post surfaces and composite materials.
    • Potassium permanganate treatment significantly influenced microtensile interfacial bond strength for both composite materials.
    • Post-superficial treatments enhanced bond strength, particularly with Core Paste XP.

    Conclusions:

    • Etching procedures effectively enhanced the bond strength between fiber posts and composite core materials.
    • These treatments promote adhesion through micromechanical and chemical retention mechanisms.
    • Optimized surface treatments are vital for improving the durability of dental restorations.