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A screw lock for single-tooth implant superstructures.

Z Artzi1, A Dreiangel

  • 1Department of Periodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.

Journal of the American Dental Association (1939)
|May 20, 1999
PubMed
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A novel hexagonal titanium bar technique effectively prevents abutment screw loosening in single-tooth implant restorations. This method enhances prosthetic stability, reducing complications and improving patient and dental team experiences.

Area of Science:

  • Dental Implantology
  • Prosthodontics
  • Biomaterials Engineering

Background:

  • Abutment screw loosening is a frequent complication in single-tooth implant restorations.
  • This instability can lead to functional difficulties, soft tissue irritation, and potential screw fracture.
  • Current implant designs aim for more reliable screw fixation methods.

Purpose of the Study:

  • To introduce and evaluate a new technique for securing abutment screws in single-tooth implant restorations.
  • To enhance the stability and longevity of prosthetic superstructures.
  • To minimize complications associated with screw loosening.

Main Methods:

  • A technique was developed using an elongated hexagonal titanium bar inserted into the fixed screw head.

Related Experiment Videos

  • The screw was locked, and the bar was secured with light-cured composite resin, sealing the access hole.
  • The hexagonal bar acts as a removable screw lock.

    • Main Results:

    • The hexagonal bar technique was applied to 120 single-tooth screw-retained prostheses in 100 patients over three years.
    • Successful function was observed in all prostheses, including those subjected to significant occlusal forces.
    • No instances of screw loosening or fracture were reported.

    Conclusions:

    • This technique provides secure stabilization for single-tooth implant prostheses.
    • It reduces the need for follow-up appointments, saving chair time.
    • The method alleviates frustration for both patients and dental professionals.