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  11. Surface, Microstructural, And Mechanical Characterization Of Abutment Screws With Modified Surface Characteristics

Surface, Microstructural, and Mechanical Characterization of Abutment Screws With Modified Surface Characteristics

Ioannis Papathanasiou1, Maria Dimitriadi2, Spiros Zinelis2

  • 1Department of Prosthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.

Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [Et Al.]
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

This study analyzed surface, microstructural, and mechanical properties of various abutment screws. Differences in these properties, like surface roughness and hardness, were observed, suggesting varied clinical performance.

Area of Science:

  • Biomaterials Science
  • Dental Materials Science
  • Surface Engineering

Background:

  • Abutment screws are critical components in dental implantology.
  • Surface characteristics significantly influence the mechanical behavior and longevity of dental implants.
  • Understanding these properties is essential for selecting appropriate abutment screws for optimal clinical outcomes.

Purpose of the Study:

  • To characterize the microstructural, mechanical, and surface properties of various abutment screws.
  • To compare the effects of different surface modifications (anodization, DLC coating, gold coating) on screw properties.
  • To investigate the relationship between surface characteristics and mechanical performance.

Main Methods:

  • Evaluated five anodized screws (green, purple, yellow, blue, brown), one Diamond-like carbon (DLC)-coated, one gold-alloy, one gold-coated, and one uncoated screw.
Keywords:
SEM/EDXcoatingsimplant abutment screwsmechanical properties

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  • Assessed surface roughness using an optical profiler (Sa, Sq, Ssk, Sku, Spk, Sk, Svk).
  • Conducted microstructural and elemental analysis via Scanning Electron Microscopy with Energy Dispersive X-ray spectroscopy (SEM-EDX).
  • Measured Martens Hardness (HM) and Indentation Elastic Modulus (EIT) using Instrumented Indentation Testing (IIT).

    • Main Results:

    • SEM-EDX revealed distinct microstructural and elemental differences between screw types.
    • Significant variations were found in all assessed surface roughness parameters and mechanical properties.
    • The green anodized screw exhibited higher surface roughness (Sa, Sq, Spk, Svk), while the gold-coated screw showed superior hardness (HM) and elastic modulus (EIT).

    Conclusions:

    • Abutment screws with modified surfaces demonstrate significant variations in microstructural, mechanical, and surface properties.
    • These property differences suggest potential impacts on clinical performance and implant stability.
    • Further research is warranted to correlate these findings with long-term clinical outcomes.
    nanoindentation
    optical profilometry
    roughness