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Nithyapriya Selvamani1, Ramesh Ardhanari Shanmugasundaram2, Anand Selvaraj3

  • 1Department of Prosthodontics, Adhiparasakthi Dental College and Hospital, Melmaruvathur, Tamil Nadu, India, Phone: +91 9080096491,

The Journal of Contemporary Dental Practice
|June 7, 2023
PubMed
Summary
This summary is machine-generated.

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This study found that both gold and titanium alloy abutment screws loosen after initial torquing. Routine re-torquing after 10 minutes is recommended to maintain preload and minimize loosening in dental implants.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Implantology

Background:

  • Abutment screw loosening is a common complication in dental implantology.
  • Understanding the initial stability of different abutment screw materials is crucial for long-term implant success.

Purpose of the Study:

  • To compare the degree of screw loosening in gold versus titanium alloy abutment screws without cyclic loading.
  • To evaluate the effectiveness of re-torquing in mitigating initial screw loosening.

Main Methods:

  • 20 abutment screws (10 gold, 10 titanium alloy) were tested.
  • Initial torque was applied, followed by measurements at 10 minutes.
  • Re-torquing was performed, with measurements taken immediately and 3 hours post-re-torquing.
Keywords:
Loss of torquePreload loss Screw loosening.

Related Experiment Videos

  • Angulation changes were measured using digital photography and analysis software.

    • Main Results:

    • Both gold and titanium alloy abutment screws showed loosening after initial torquing.
    • A significant difference in loosening was observed between the two materials after initial torquing.
    • No further positional changes were noted in abutment screws three hours after re-torquing.

    Conclusions:

    • Re-torquing gold and titanium alloy abutment screws 10 minutes after initial torquing is essential.
    • Routine re-torquing helps retain preload and minimize screw loosening before implant loading.
    • Gold abutment screws may offer better initial preload retention compared to titanium alloy screws.