TODENTJ-25-03-2019_TODENTJ-3-245 1553505119 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 12 30 2009 3 1 Aloísio Oro Spazzin Guilherme Elias Pessanha Henriques Mauro Antônio de Arruda Nóbilo Rafael Leonardo Xediek Consani Lourenço Correr-Sobrinho Marcelo Ferraz Mesquita Objectives: This study evaluated the influence of prosthetic screw material on joint stability in implantsupported dentures at two levels of fit. Methods: Ten mandibular implant-supported dentures were fabricated. Twenty cast models were fabricated using these dentures. Four groups (n=10) were tested, according to the vertical fit of the dentures [passive and non-passive] and prosthetic screw materials [titanium (Ti) or gold (Au) alloy]. The one-screw test was performed to quantify the vertical misfits using an optic microscope. The loosening torque for the prosthetic screws was measured 24 hours after the tightening torque (10 Ncm) using a digital torque meter. Data were analyzed by two-way ANOVA and Tukey’s test (α=0.05). Results: Overall, dentures with passive fit and Ti screws resulted in significantly higher loosening torque of the prosthetic screws (p<0.05). No significant interaction was found between fit level and screw material (p=0.199). The prosthetic screw material and fit of implant-supported dentures have an influence on screw joint stability. Ti screws presented higher joint stability than Au screws and minimum of misfit should be found clinically to improve the mechanical behavior of the screw joint. 12 30 2009 245 249 TODENTJ-3-245 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2009-4-9 2009-8-17 2009-9-17 2009-12-30 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210600903010245 1553505119 https://opendentistryjournal.com/VOLUME/3/PAGE/245/ https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.pdf https://opendentistryjournal.com/contents/volumes/V3/TODENTJ-3-245/TODENTJ-3-245.xml J Prosthet Dent Romero GG 84 602 2000 Romero GG, Engelmeier R, Powers JM, Canterbury AA. 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