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Type: Artigo
Title: Loosening torque of universal abutment screws after cyclic loading: influence of tightening technique and screw coating
Author: Bacchi, Atais
Regalin, Alexandre
Brilhante Bhering, Claudia Lopes
Alessandretti, Rodrigo
Spazzin, Aloisio Oro
Abstract: The purpose of this study was to evaluate the influence of tightening technique and the screw coating on the loosening torque of screws used for Universal Abutment fixation after cyclic loading. Forty implants (Titamax Ti Cortical, HE, Neodent) (n=10) were submerged in acrylic resin and four tightening techniques for Universal Abutment fixation were evaluated: A - torque with 32 Ncm (control); B - torque with 32 Ncm holding the torque meter for 20 seconds; C - torque with 32 Ncm and retorque after 10 minutes; D - torque (32 Ncm) holding the torque meter for 20 seconds and retorque after 10 minutes as initially. Samples were divided into subgroups according to the screw used: conventional titanium screw or diamond like carbon-coated (DLC) screw. Metallic crowns were fabricated for each abutment. Samples were submitted to cyclic loading at 10(6) cycles and 130 N of force. Data were analyzed by two-way ANOVA and Tukey's test (5%). RESULTS. The tightening technique did not show significant influence on the loosening torque of screws (P=.509). Conventional titanium screws showed significant higher loosening torque values than DLC (P=.000). The use of conventional titanium screw is more important than the tightening techniques employed in this study to provide long-term stability to Universal Abutment screws
Subject: Implantes dentários
Retenção em prótese dentária
Country: Coreia do Sul
Editor: Korean Academy of Prosthodontics
Rights: Fechado
Identifier DOI: 10.4047/jap.2015.7.5.375
Date Issue: 2015
Appears in Collections:FOP - Artigos e Outros Documentos

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