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Dent. J."],"abstract":"<jats:p>Abstract The aim of the study was to evaluate the effect of the screw-retained abutment material (zirconia (Yz), lithium disilicate (Ld), Polymer-infiltrated ceramic network (Picn), and Polietheretherketone (Peek)) on the fatigue behavior and stress distribution of lithium disilicate restorative material. Ld discs (\u00d8= 10 mm; thickness = 1 mm) were obtained and allocated into four groups according to the abutment material factor: Yz, Ld, Picn, and Peek (\u00d8= 10mm; thickness 3 mm). A screw access hole was made at the center of each abutment and filled with resin composite (thickness = 2 mm). The materials were adhesively bonded and tested under monotonic mechanical load (n= 3) and cyclic fatigue (n= 15; initial load: 200 N for 10,000 cycles; step size: 100 N\/10,000 cycles; frequency: 20 Hz) until failure. Finite element and Scanning Electron Microscopy (SEM) analyses were also performed. The obtained data were analyzed by 1-Way ANOVA for monotonic (\u03b1=0.05) and Kaplan Meier and log-rank post-hoc for fatigue data tests. All groups presented a decrease in the fatigue failure load (FFL) when compared to the monotonic test. The abutment material affected the lithium disilicate restoration performance (p=.048; F= 4.134), since zirconia showed the highest FFL (p&lt;.05), followed by Picn and Ld, which were similar to each other (p&gt;.05). The lowest values of FFL were found for Peek (p&lt;.05). The screw-retained abutment material influences the fatigue behavior of lithium disilicate restorations, being zirconia the most indicated material to enhance mechanical performance.<\/jats:p>","DOI":"10.1590\/0103-644020256936","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T15:05:18Z","timestamp":1769785518000},"source":"Crossref","is-referenced-by-count":1,"title":["Effect of the screw-retained abutment material on the fatigue behavior of lithium disilicate restorations"],"prefix":"10.1590","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-0388-9748","authenticated-orcid":false,"given":"Eduarda de Miranda","family":"Bohrer","sequence":"first","affiliation":[{"name":"Federal University of Santa Maria,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7702-0013","authenticated-orcid":false,"given":"Pablo Machado","family":"Soares","sequence":"additional","affiliation":[{"name":"Federal University of Santa Maria,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3219-872X","authenticated-orcid":false,"given":"Maria Gabriela","family":"Packaeser","sequence":"additional","affiliation":[{"name":"Universiteit van Amsterdam and Vrije Universiteit,  Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2159-3787","authenticated-orcid":false,"given":"Lucas Saldanha da","family":"Rosa","sequence":"additional","affiliation":[{"name":"Federal University of Santa Maria,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5412-3546","authenticated-orcid":false,"given":"Jo\u00e3o Paulo Mendes","family":"Tribst","sequence":"additional","affiliation":[{"name":"Universiteit van Amsterdam and Vrije Universiteit,  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