{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T08:12:44Z","timestamp":1776154364017,"version":"3.50.1"},"reference-count":42,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,4,11]],"date-time":"2023-04-11T00:00:00Z","timestamp":1681171200000},"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":[[2024,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>This in vitro study evaluated the fracture strength of screw\u2010retained zirconia crowns connected to zirconia (Zr) and titanium (Ti) implants after undergoing a simulation of 5 years of clinical use.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>Forty\u2010eight screw\u2010retained zirconia crowns were fabricated and assembled on four implant systems, with 12 in each group: (1) Zr implant (pure ceramic; Straumann AG) (PZr); (2) Zr implant (NobelPearl; Nobel Biocare) (NPZr); (3) Ti\u2013Zr implant (Bone Level Roxolid; Straumann AG) (RSTiZr); (4) Ti implant (Conical Connection PMC; Nobel Biocare) (NRTi). Crowns were luted to their associated abutments using resin cement and then torqued to their assigned implants at the recommended torque value. Specimens were subjected to dynamic loading for 1,200,000 loading cycles. Fracture strength, measured in Newtons (N), was tested under static compression load using a universal testing machine at an angle of 30\u00b0. One\u2010way ANOVA and Tukey's multiple comparisons post hoc test were used to compare the mean fracture values between the groups at a significance level of 0.05.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The average fracture strengths for the RSTiZr and NRTi groups were 1207\u00a0\u00b1\u00a0202 and 1073\u00a0\u00b1\u00a0217\u00a0N, respectively, which was significantly (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.0001) higher than the PZr and NPZr groups (712\u00a0\u00b1\u00a076 and 571.6\u00a0\u00b1\u00a0167\u00a0N, respectively). However, no significant difference was found between the fracture strength value of RSTiZr and NRTi (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.260) or PZr and NPZr (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.256) groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Zirconia crowns connected to Zr implants have the potential to withstand the average physiological occlusal forces which occur in the anterior and premolar regions.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jopr.13683","type":"journal-article","created":{"date-parts":[[2023,3,28]],"date-time":"2023-03-28T03:48:50Z","timestamp":1679975330000},"page":"273-280","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Fracture strength of screw\u2010retained zirconia crowns assembled on zirconia and titanium 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