{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T09:25:38Z","timestamp":1783416338647,"version":"3.54.6"},"reference-count":48,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T00:00:00Z","timestamp":1783382400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Life"],"abstract":"<jats:p>The growing demand for implant-supported rehabilitative prosthetic treatments has reinforced the need to optimize biomechanical performance, particularly regarding force distribution. This study aimed to evaluate the stress distribution generated by different configurations of full-arch implant-supported prostheses using three-dimensional finite element analysis. Two mandibular models were created using SolidWorks 2010 (SolidWorks Corp., Waltham, MA, USA) and Rhinoceros\u00ae 3D 4.0 (NURBS Modeling for Windows, USA). Each model represented a mandible restored with a full-arch fixed prosthesis supported by external hex implants (4.0 \u00d7 13.0 mm; Master, Conex\u00e3o Sistemas de Pr\u00f3tese, S\u00e3o Paulo, Brazil) placed in the interforaminal region, differing only in implant angulation. Model 1 included four implants positioned perpendicular to the alveolar ridge, whereas Model 2 represented the All-on-Four configuration with distal implants tilted at 30\u00b0. The prosthesis was modeled in acrylic resin with a NiCr metal framework. The geometries were exported to FEMAP 11.0 for mesh generation. Axial loading of 300 N was applied bilaterally (75 N per tooth), and oblique loading of 150 N was applied unilaterally (75 N per tooth) on the first premolars and first molars. Obtained using NEiNastran\u00ae 9.2 showed that the tilted-implant model exhibited higher stress concentrations under both loading conditions. The All-on-Four configuration generated the highest stress levels, particularly around the distal implants. The null hypothesis of this study was that there would be no difference in stress distribution among full-arch implant-supported prostheses supported by straight implants and those rehabilitated according to the All-on-Four concept with tilted distal implants.<\/jats:p>","DOI":"10.3390\/life16071128","type":"journal-article","created":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T08:04:49Z","timestamp":1783411489000},"page":"1128","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluation of Stress Distribution in \u201cAll-on-Four\u201d Prostheses: A Three-Dimensional Finite Element Analysis"],"prefix":"10.3390","volume":"16","author":[{"given":"Eduardo Francisco de Souza","family":"Faco","sequence":"first","affiliation":[{"name":"Department of Diagnosis and Surgery, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andressa Paschoal","family":"Amoroso","sequence":"additional","affiliation":[{"name":"Department of Dental Materials and Prosthodontics, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1628-5146","authenticated-orcid":false,"given":"Fl\u00e1via Priscila","family":"Pereira","sequence":"additional","affiliation":[{"name":"UNIFUNEC\u2014Integrated Colleges of Santa F\u00e9 do Sul, Santa F\u00e9 do Sul 15775-000, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6478-7119","authenticated-orcid":false,"given":"Luana Ferreira","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Diagnosis and Surgery, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7801-0338","authenticated-orcid":false,"given":"Leandro L\u00e9cio de Lima","family":"Sousa","sequence":"additional","affiliation":[{"name":"Department of Periodontics, Universus Veritas University Guarulhos\u2014UNG, Guarulhos 07023-070, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andr\u00e9 Luis da Silva","family":"Fabris","sequence":"additional","affiliation":[{"name":"Department of Diagnosis and Surgery, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Idelmo Rangel","family":"Garcia Junior","sequence":"additional","affiliation":[{"name":"Department of Diagnosis and Surgery, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Vitor Quinelli","family":"Mazaro","sequence":"additional","affiliation":[{"name":"Department of Dental Materials and Prosthodontics, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Osvaldo Magro","family":"Filho","sequence":"additional","affiliation":[{"name":"Department of Diagnosis and Surgery, School of Dentistry, S\u00e3o Paulo State University (UNESP), Ara\u00e7atuba 16010-380, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,7]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Osseointegrated implants in the treatment of the edentulous jaw: Experience from a 10-year period","volume":"16","author":"Hansson","year":"1977","journal-title":"Scand. 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C"}],"container-title":["Life"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-1729\/16\/7\/1128\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T08:59:11Z","timestamp":1783414751000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-1729\/16\/7\/1128"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7,7]]},"references-count":48,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2026,7]]}},"alternative-id":["life16071128"],"URL":"https:\/\/doi.org\/10.3390\/life16071128","relation":{},"ISSN":["2075-1729"],"issn-type":[{"value":"2075-1729","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,7,7]]}}}