{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T10:49:19Z","timestamp":1774522159826,"version":"3.50.1"},"reference-count":0,"publisher":"Sociedad Argentina de Investigacion Odontologica","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta Odontol Latinoam"],"abstract":"<jats:p>Based on its mechanical properties, PEEK (polyether-ether-ketone) might be useful in restorative procedures. In oral rehabilitation, its viability has been studied mainly for prostheses and dental implants. Aim: The aim of this study was to evaluate the fit accuracy of dental implant bars made of either PEEK or cobalt-chrome submitted to cycling mechanics. Materials and Method: This was an experimental in vitro study, where units were treated with two implants and mini-abutments, joined by cobalt-chrome or polyether-ether-ketone PEEK bars. A total 20 bars were prepared (n=10 per group) and subjected to mechanical cycling tests (1 million cycles on the distal cantilever of the bar in the vertical direction, 120N and sinusoidal loading, at a frequency of 2Hz). The fit at the abutment\/implant interface was measured before and after cycling, and the counter-torque of the vertical screw of the mini abutments was measured after cycling, using a digital torquemeter. Data were analyzed by three-way ANOVA and Tukey\u2019s test at 5% significance level. Results: No statistically significant interaction was found among the three factors considered (bar material, implant positioning and mechanical cycling) (p = 0.592). No significant difference was identified in the interaction between bar material and implant positioning (p = 0.321), or between implant positioning and mechanical cycling (p = 0.503). The association between bar material and mechanical cycling was statistically significant (p = 0.007), with the cobalt-chrome bar resulting in greater misfit with mechanical cycling. There was no difference in counter-torque values between groups. Conclusions: The PEEK bar provided better fit of the mini abutments to the implants, even after mechanical cycling. The counter-torque of the screws was similar in all scenarios considered.<\/jats:p>","DOI":"10.54589\/aol.36\/2\/71","type":"journal-article","created":{"date-parts":[[2023,9,27]],"date-time":"2023-09-27T01:24:22Z","timestamp":1695777862000},"page":"71-77","source":"Crossref","is-referenced-by-count":3,"title":["Precision of polyether ether ketone (PEEK) or cobalt-chrome implant bar fit to implants after mechanical cycling"],"prefix":"10.54589","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-6737-9328","authenticated-orcid":false,"given":"Eduardo","family":"V Silva J\u00fanior","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5345-5776","authenticated-orcid":false,"given":"Roberta","family":"T Basting","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0078-9895","authenticated-orcid":false,"given":"Cecilia","family":"P Turssi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2877-6797","authenticated-orcid":false,"given":"Fabiana","family":"MG Fran\u00e7a","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"31696","published-online":{"date-parts":[[2023,8,28]]},"container-title":["Acta Odontol\u00f3gica Latinoamericana"],"original-title":[],"deposited":{"date-parts":[[2023,9,27]],"date-time":"2023-09-27T01:24:22Z","timestamp":1695777862000},"score":1,"resource":{"primary":{"URL":"https:\/\/actaodontologicalat.com\/wp-content\/uploads\/2023\/09\/aol_2023_36_2_71.pdf"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,8,28]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2023,8,28]]}},"URL":"https:\/\/doi.org\/10.54589\/aol.36\/2\/71","relation":{},"ISSN":["1852-4834"],"issn-type":[{"value":"1852-4834","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,8,28]]}}}