{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T08:40:45Z","timestamp":1784882445595,"version":"3.55.0"},"reference-count":33,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2021,3,27]],"date-time":"2021-03-27T00:00:00Z","timestamp":1616803200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Prosthodontics"],"published-print":{"date-parts":[[2021,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The aim of this in vitro study was to evaluate the effect of crown height on the screw stability of screw\u2010retained titanium implant crowns subjected to cyclic loading conditions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>Twenty\u2010one implants with internal hex connections were placed in epoxy resin holders. Mandibular first molar screw\u2010retained titanium implant crowns with UCLA type, crown\u2010abutment connections were CAD\/CAM fabricated. Seven crowns of 3 different heights (6 mm, 10 mm, and 14 mm) were made. The crowns were seated onto the implants and screws were tightened to 30 Ncm. The implants were clamped into holders and stepwise cyclic loads were applied to the occlusal surface at 30\u2010degree angles to the long axes of the crowns. The detorque values were measured after each 5 million cycles. Before increasing the applied load, the crowns were secured with new screws and tightened to 30 Ncm. Failure times, survival estimates and detorque values were then analyzed. (alpha = 0.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Crown height did not significantly affect detorque values. However, five 14\u2010mm crowns failed with varying fractures during the 475 N loading condition. Overall, a significantly lower survival for 14 mm crowns was found compared to 6 mm and 10 mm crowns (<jats:italic>p<\/jats:italic> = 0.004).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Crown heights of one\u2010piece screw\u2010retained titanium implant crowns did not significantly affect detorque values. Screw fracture, however, was greater for crown height of 14 mm than those of 6 mm and 10 mm.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jopr.13352","type":"journal-article","created":{"date-parts":[[2021,3,5]],"date-time":"2021-03-05T12:12:45Z","timestamp":1614946365000},"page":"515-519","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Effect of Crown Height on the Screw Stability of Titanium Screw\u2010Retained Crowns"],"prefix":"10.1111","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7101-363X","authenticated-orcid":false,"given":"Burak","family":"Yilmaz","sequence":"first","affiliation":[{"name":"Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern  Bern Switzerland"},{"name":"Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine University of Bern  Bern Switzerland"},{"name":"Division of Restorative and Prosthetic 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USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5608-5352","authenticated-orcid":false,"given":"Lisa A.","family":"Lang","sequence":"additional","affiliation":[{"name":"Division of Restorative and Prosthetic Dentistry, College of Dentistry The Ohio State University  Columbus OH 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