{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T22:15:09Z","timestamp":1790374509896,"version":"4.1.0"},"reference-count":33,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,1,23]],"date-time":"2025-01-23T00:00:00Z","timestamp":1737590400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical &amp;amp; Exp Dental Res"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>The use of vertical margin design in all\u2010ceramic restoration has generated inquiries regarding its clinical efficacy under diverse dynamic oral conditions. This research aims to assess the marginal fit and fracture resistance of monolithic zirconia crowns featuring vertical margin design as opposed to those with conventional horizontal margin design.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Two metal dies were employed to generate replicated resin dies mimicking mandibular first molar preparation. The metal dies were precision\u2010engineered with two margin designs: vertical margin design presenting a shoulderless configuration (Featheredge) and horizontal margin design (Radial Shoulder). Forty zirconia crowns were produced on the replicated resin dies using two varieties of monolithic zirconia, with twenty crowns in each category: pre\u2010shaded and multilayered zirconia. Both sets were further subdivided into two groups based on the finish line configuration utilized (n\u2009=\u200910). The vertical marginal gap of the zirconia crowns was gauged before and after thermocycling (5\u201055oC\/5000 cycles), followed by loading the crowns until fracture occurred. Statistical analysis was performed using one\u2010way analysis of variance (ANOVA), accompanied by Bonferroni's post hoc test and independent <jats:italic>t<\/jats:italic>\u2010test for pairwise comparisons.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The Shoulder subgroup of BruxZir exhibited the highest mean marginal gap value (120.06\u2009\u00b1\u200910.15\u2009\u00b5), while the Featheredge subgroup of BruxZir displayed the lowest value (49.72\u2009\u00b1\u20096.53\u2009\u00b5). Among the BruxZir group, the Featheredge subgroup showcased the highest mean fracture resistance value (4251.57\u2009\u00b1\u2009279.90\u2009N), whereas the Shoulder subgroup recorded the lowest value (1721.60\u2009\u00b1\u2009225.16\u2009N).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Monolithic zirconia crowns with vertical margin design (Featheredge) demonstrated statistically enhanced performance compared to conventional horizontal margin design, as evidenced by lower marginal gap values and increased fracture resistance tolerance.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cre2.70064","type":"journal-article","created":{"date-parts":[[2025,1,24]],"date-time":"2025-01-24T04:32:16Z","timestamp":1737693136000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Marginal Fit and Fracture Resistance of Vertical Versus Horizontal Margins in Monolithic Zirconia Crowns"],"prefix":"10.1002","volume":"11","author":[{"given":"Mohamed A.","family":"Salama","sequence":"first","affiliation":[{"name":"Fixed Prosthodontic Specialist Medical Services of the Egyptian Armed Forces Basrah Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6906-4342","authenticated-orcid":false,"given":"Mohamed F.","family":"Aldamaty","sequence":"additional","affiliation":[{"name":"Department of Fixed Prosthodontics, Faculty of Dental Medicine Al\u2010Azhar University Cairo Egypt"},{"name":"Department of Restorative and Aesthetic Dentistry, College of Dentistry Almaaqal University Basrah Iraq"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moamen A.","family":"Abdalla","sequence":"additional","affiliation":[{"name":"Department of Substitutive Dental Science, College of Dentistry Imam Abdulrahman bin Faisal University Dammam Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9067-9552","authenticated-orcid":false,"given":"Elsayed Ali","family":"Omar","sequence":"additional","affiliation":[{"name":"Fixed Prosthodontics Department, Faculty of Dental Medicine Al\u2010Azhar University Cairo Egypt"},{"name":"Department of Prosthodontics College of Dentistry, Taif University Taif Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0956-2854","authenticated-orcid":false,"given":"Mohammed H.","family":"AbdElaziz","sequence":"additional","affiliation":[{"name":"Fixed Prosthodontics Department, Faculty of Dental Medicine Al\u2010Azhar University Cairo Egypt"},{"name":"Substitutive Dental Science, College of Dentistry, Taibah University Al Madinah Almonawarh  Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6536-8269","authenticated-orcid":false,"given":"Ahmed Yaseen","family":"Alqutaibi","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics Faculty of Dentistry, Ibb University  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