{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T23:11:04Z","timestamp":1790723464068,"version":"4.1.0"},"reference-count":42,"publisher":"Georg Thieme Verlag KG","issue":"04","license":[{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur J Dent"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>This article aims to assess and compare the patterns of stress distribution and the biomechanical responses of monolithic zirconia and monolithic lithium disilicate crowns of different occlusal thicknesses using three-dimensional (3D) finite element analysis (FEA).<\/jats:p>\n                  <jats:p>A 3D FEA model of a mandibular first molar with all supporting structures was constructed. Eight models were developed to simulate clinically recommended preparation thicknesses for each material, including monolithic zirconia (n\u2009=\u20094; occlusal reductions of 0.5, 1.0, 1.5, and 2.0\u2009mm) and monolithic lithium disilicate (n\u2009=\u20094; nonfunctional\/functional cusp reductions ranging from 1.0\/1.5 to 2.5\/3.0\u2009mm). Two loading scenarios were applied: a 225-N masticatory load at three angulations (0-degree vertical, 45-degree oblique, and 90-degree horizontal) and a 600-N axial maximum bite force. The von Mises stress (VM, used as a scalar yield indicator) and the maximum principal stress (S, used as a tensile fracture predictor for brittle ceramics) were recorded in the crown and in the underlying dentin.<\/jats:p>\n                  <jats:p>Across all thicknesses, zirconia crowns developed higher peak internal VM stress (maximum: 456.8 MPa) but transferred less tensile stress to the underlying dentin (maximum: S \u2248 127 MPa) than lithium disilicate crowns, which transferred greater stress to the dentin (maximum: S \u2248 145.7 MPa). For both materials, non-axial loads (45 and 90\u2009degrees) generated markedly higher stress concentrations (maximum: VM \u2248 457 MPa) than vertical loads (maximum: VM \u2248 278 MPa). Stress distribution within the lithium disilicate crown became visibly more homogeneous with increasing occlusal thickness.<\/jats:p>\n                  <jats:p>Within the limitations of this in silico model, monolithic zirconia exhibited a stress-shielding pattern in which more stress was retained within the crown and less was transmitted to the dentin, whereas lithium disilicate transmitted comparatively more stress to the dentin. Non-axial loading produced the highest stress peaks for both materials in this simulation. Because each material was modeled at the occlusal thickness clinically recommended for it, direct material-versus-material superiority cannot be inferred from these results, and clinical extrapolation should be made with caution.<\/jats:p>","DOI":"10.1055\/s-0046-1825876","type":"journal-article","created":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T23:08:36Z","timestamp":1786576116000},"page":"1360-1370","source":"Crossref","is-referenced-by-count":0,"title":["A Three-Dimensional Finite Element Analysis to Evaluate and Compare Stress Levels and Distribution Patterns in Lithium Disilicate and Zirconia Crowns"],"prefix":"10.1055","volume":"20","author":[{"given":"Ruchika U.","family":"Mukherjee","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics and Crown & Bridge, Nitte (Deemed to be University), AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Mangaluru, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7814-6067","authenticated-orcid":false,"given":"Shilpa S.","family":"Dandekeri","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics and Crown & Bridge, Nitte (Deemed to be University), AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Mangaluru, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chethan","family":"Hegde","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics and Crown & Bridge, Nitte (Deemed to be University), AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Mangaluru, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manoj","family":"Shetty","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics and Crown & Bridge, Nitte (Deemed to be University), AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Mangaluru, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2026,8,12]]},"reference":[{"issue":"04","key":"ref1","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1177\/20501684221132941","article-title":"Clinical performance of lithium disilicate and zirconia CAD\/CAM crowns using digital impressions: a systematic review","volume":"11","author":"M Benli","year":"2022","journal-title":"Prim Dent J"},{"issue":"S 01","key":"ref2","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1111\/j.1834-7819.2010.01299.x","article-title":"Ceramic materials in dentistry: historical evolution and current practice","volume":"56","author":"J R Kelly","year":"2011","journal-title":"Aust Dent J"},{"issue":"01","key":"ref3","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1186\/s12903-019-0838-x","article-title":"Current status on lithium disilicate and zirconia: a narrative review","volume":"19","author":"F 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