title: Torque required to loosen single-tooth implant abutment screws before and after simulated function.
abstract: 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.
authors.affiliation: Department of Oral Health Practice, College of Dentistry, Lexington, Kentucky 40536.
authors.forename: L C
authors.initials: LC
authors.lastname: Breeding
authors.forename: D L
authors.initials: DL
authors.lastname: Dixon
authors.forename: E W
authors.initials: EW
authors.lastname: Nelson
authors.forename: J D
authors.initials: JD
authors.lastname: Tietge
mesh_terms: D000704:Analysis of Variance; D001863:Bone Screws; D000044:Dental Abutments; D003738:Dental Cements; D015921:Dental Implants; D017268:Dental Prosthesis Retention / Q000295:instrumentation*; D003799:Dental Stress Analysis; D011475:Prosthesis Failure; D012399:Rotation; D013997:Time Factors; D014093:Tooth, Artificial
chemical_list: C085730:Ceka Bond; D003738:Dental Cements; D015921:Dental Implants