Torque Required to Loosen Single-Tooth Implant Abutment Screws Before and After Simulated Function

Breeding, Larry C.; Dixon, Donna L.; Nelson, Eric W.; Tietge, James D.
September 1993
International Journal of Prosthodontics;Sep/Oct1993, Vol. 6 Issue 5, p435
Academic Journal
The amount of torque required to loosen screws from three different antirotational screw-retained abutment/implant combinations was compared (with and without adhesive sealant applied) after 6 kg of force was applied during simulated intraoral movements. Movements were generated over two simulated time periods, representing 1 and 6 months. There was no significant decrease (α < .05) in the torque required to loosen the screws after either time period when using Calcitek Omnilock or Stryker Minimatic. The Core-Vent Bio-Vent specimens, however, exhibited a significant decrease (α < .05) in the amount of torque required to loosen the screws at the 1-month test period only. The addition of adhesive sealant significantly increased (α < .05) the amount of torque necessary to loosen the screws only in the Core-Vent specimens.


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