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Volume 6 , Issue 5
September/October 1993

Pages 435-439


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

Breeding/Dixon/Nelson/Tietge


PMID: 8297452

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 (alpha < .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 (alpha < .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 (alpha < .05) the amount of torque necessary to loosen the screws only in the Core-Vent specimens.


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