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Color Assessment of Screw-Retained Implant Prostheses Access Hole Fillings: An In-Vitro Study.

Arash Sarrafzadeh1, Afrooz Nakhostin2, Soheila Jadidi3,4

  • 1Department of Oral and Maxillofacial Surgery, Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

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|February 5, 2025
PubMed
Summary

For screw-retained restorations, combining flowable and opaque composite resins is recommended for better aesthetics. Porcelain plugs offer no significant advantage and are difficult to use.

Keywords:
ColorComposite ResinsDental PorcelainDental Prosthesis, Implant-SupportedSpectrophotometry

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Implantology

Background:

  • Aesthetics are crucial in screw-retained implant restorations.
  • Evaluating filling materials for access cavities is important for long-term esthetic outcomes.

Purpose of the Study:

  • To compare the aesthetic performance of three different materials used to fill screw access cavities in implant restorations.
  • To assess color stability and surface characteristics after aging simulations.

Main Methods:

  • Laboratory study simulating screw-retained restorations.
  • Materials tested: flowable composite resin, opaque and flowable composite resin, and porcelain plugs.
  • Aging via thermocycling in various beverages, followed by colorimetric and surface roughness analysis.

Main Results:

  • Material type significantly impacted color difference between restoration and filling material.
  • Porcelain plugs showed increased color difference after aging compared to opaque/flowable composite.
  • Opaque and flowable composite resin combination demonstrated favorable esthetic stability.

Conclusions:

  • Porcelain plugs do not offer superior aesthetics and present fabrication challenges.
  • A layered approach using opaque composite resin beneath flowable composite is recommended for optimal esthetics.
  • This technique effectively masks underlying metal components in implant restorations.