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Related Experiment Videos

The reverse-torque test: a clinical report

D Y Sullivan1, R L Sherwood, T A Collins

  • 1University of Pennsylvania, School of Dental Medicine, Philadelphia, USA.

The International Journal of Oral & Maxillofacial Implants
|March 1, 1996
PubMed
Summary
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Reverse torque testing is a safe method to check dental implant stability. This study found no increased failure rates in 404 implants tested at 20 Ncm, confirming osseointegration.

Area of Science:

  • Dental implantology
  • Biomaterials science
  • Orthopedic surgery

Background:

  • Assessing osseointegration is crucial for dental implant success.
  • Previous studies focused on animal models for reverse torque to failure analysis.
  • Limited human data exists on the clinical application of reverse torque testing.

Purpose of the Study:

  • To evaluate the safety and reliability of reverse torque testing for verifying osseointegration in human dental implants.
  • To determine failure torque values in a human subject.
  • To assess the impact of reverse torque testing on implant failure rates in a clinical setting.

Main Methods:

  • Three pure titanium screw-shaped implants were subjected to reverse torque to failure in a human volunteer.

Related Experiment Videos

  • Clinical data from 404 implants were analyzed post-reverse torque testing and loading.
  • Failure torque was measured in Newton centimeters (Ncm).

    • Main Results:

    • Implant failures in the human volunteer occurred between 45 and 58 Ncm.
    • No increase in failure rates was observed in the 404 clinically examined implants after testing and loading.
    • Reverse-torque testing at 20 Ncm demonstrated a high degree of safety and reliability.

    Conclusions:

    • Reverse torque testing at 20 Ncm is a safe and reliable method for verifying osseointegration in pure titanium screw-shaped dental implants.
    • Clinical application of this testing method does not appear to compromise implant survival rates.
    • This technique provides valuable data for assessing implant stability in humans.