{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T18:03:51Z","timestamp":1788545031383,"version":"build-2803163510"},"reference-count":28,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2024,3,26]],"date-time":"2024-03-26T00:00:00Z","timestamp":1711411200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,3,26]],"date-time":"2024-03-26T00:00:00Z","timestamp":1711411200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100013041","name":"Vice-Chancellor for Research, Shiraz University of Medical Sciences","doi-asserted-by":"publisher","award":["26409"],"award-info":[{"award-number":["26409"]}],"id":[{"id":"10.13039\/501100013041","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Oral Health"],"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Background<\/jats:title>\n                <jats:p>While the concept of angled screw channels has gained popularity, there remains a scarcity of research concerning the torque loss and fracture strength of monolithic zirconia restorations with various screw channel angulations when exposed to thermomechanical cycling. This in-vitro study aimed to evaluate the reverse torque value and fracture resistance of one-piece screw-retained hybrid monolithic zirconia restorations with angulated screw channels after thermomechanical cycling.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>One-piece monolithic zirconia restorations, with angulated screw channels set at 0\u00b0, 15\u00b0, and 25\u00b0 (<jats:italic>n<\/jats:italic>\u2009=\u20096 per angulation) were fabricated and bonded to titanium inserts using a dual-cure adhesive resin cement. These assemblies were then screwed to implant fixtures embedded in acrylic resin using an omnigrip screwdriver, and reverse torque values were recorded before and after thermomechanical cycles. Additionally, fracture modes were assessed subsequent to the application of compressive load. One-way ANOVA and Bonferroni post hoc test were used to compare the groups (\u03b1\u2009=\u20090.05).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The study groups were significantly different regarding the fracture resistance (<jats:italic>P<\/jats:italic>\u2009=\u20090.0015), but only insignificantly different in the mean percentage torque loss (<jats:italic>P<\/jats:italic>\u2009=\u20090.4400). Specifically, the fracture resistance of the 15\u00b0 group was insignificantly higher compared to the 0\u00b0 group (<jats:italic>P<\/jats:italic>\u2009=\u20090.9037), but significantly higher compared to the 25\u00b0 group (<jats:italic>P<\/jats:italic>\u2009=\u20090.0051). Furthermore, the fracture resistance of the 0\u00b0 group was significantly higher than that of the 25\u00b0 group (<jats:italic>P<\/jats:italic>\u2009=\u20090.0114).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>One-piece hybrid monolithic zirconia restorations with angulated screw channels can be considered an acceptable choice for angulated implants in esthetic areas, providing satisfactory fracture strength and torque loss.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-024-04171-3","type":"journal-article","created":{"date-parts":[[2024,3,26]],"date-time":"2024-03-26T11:02:30Z","timestamp":1711450950000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Influence of screw channel angulation on reverse torque value and fracture resistance in monolithic zirconia restorations after thermomechanical cycling: an in-vitro study"],"prefix":"10.1186","volume":"24","author":[{"given":"Amir Alireza","family":"Khaledi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shouka","family":"Shalileh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maryam","family":"Hejazi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rashin","family":"Giti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,3,26]]},"reference":[{"key":"4171_CR1","doi-asserted-by":"publisher","first-page":"3811","DOI":"10.3390\/ma15113811","volume":"15","author":"C Cinquini","year":"2022","unstructured":"Cinquini C, Marchio V, Di Donna E, Alfonsi F, Derchi G, Nisi M, et al. 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