{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T15:57:18Z","timestamp":1791215838291,"version":"4.1.0"},"reference-count":45,"publisher":"Georg Thieme Verlag KG","issue":"01","license":[{"start":{"date-parts":[[2021,9,24]],"date-time":"2021-09-24T00:00:00Z","timestamp":1632441600000},"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":[[2022,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Objective\u2003Polymeric framework represent an innovative approach for implant-supported dental prostheses. However, the mechanical response of ultra-high performance polymers as frameworks for full-arch prostheses under the \u201call-on-four concept\u201d remains unclear. The present study applied finite element analysis to examine the behavior of polyetherketoneketone (PEKK) and polyetheretherketone (PEEK) prosthetic frameworks.<\/jats:p>\n                  <jats:p>Materials and Methods\u2003A three-dimensional maxillary model received four axially positioned morse-taper implants, over which a polymeric bar was simulated. The full-arch prosthesis was created from a previously reported database model, and the imported geometries were divided into a mesh composed of nodes and tetrahedral elements in the analysis software. The materials were assumed as isotropic, elastic, and homogeneous, and all contacts were considered bonded. A normal load (500 N magnitude) was applied at the occlusal surface of the first left molar after the model was fixed at the base of the cortical bone. The microstrain and von-Mises stress were selected as criteria for analysis.<\/jats:p>\n                  <jats:p>Results\u2003Similarities in the mechanical response were observed in both framework for the peri-implant tissue, as well as for stress generated in the implants (263\u2013264 MPa) and abutments (274\u2013273 MPa). The prosthetic screw and prosthetic base concentrated more stress with PEEK (211 and 58 MPa, respectively) than with PEKK (192 and 49 MPa), while the prosthetic framework showed the opposite behavior (59 MPa for PEEK and 67 MPa for PEKK).<\/jats:p>\n                  <jats:p>Conclusion\u2003The main differences related to the mechanical behavior of PEKK and PEEK frameworks for full-arch prostheses under the \u201call-on-four concept\u201d were reflected in the prosthetic screw and the acrylic base. The superior shock absorbance of PEKK resulted in a lower stress concentration on the prosthetic screw and prosthetic base. This would clinically represent a lower fracture risk on the acrylic base and screw loosening. Conversely, lower stress concentration was observed on PEEK frameworks.<\/jats:p>","DOI":"10.1055\/s-0041-1731833","type":"journal-article","created":{"date-parts":[[2021,9,24]],"date-time":"2021-09-24T18:51:31Z","timestamp":1632509491000},"page":"115-121","source":"Crossref","is-referenced-by-count":60,"title":["Mechanical Response of PEKK and PEEK As Frameworks for Implant-Supported Full-Arch Fixed Dental Prosthesis: 3D Finite Element Analysis"],"prefix":"10.1055","volume":"16","author":[{"given":"Regina Furbino","family":"Villefort","sequence":"additional","affiliation":[{"name":"Federal University of Esp\u00edrito Santo, Rede Nordeste de Biotecnologia, Vit\u00f3ria, Esp\u00edrito Santo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro Jacy Santos","family":"Diamantino","sequence":"additional","affiliation":[{"name":"Department of Dental Materials and Prosthodontics, Institute of Science and Technology, S\u00e3o Paulo State University, S\u00e3o Jos\u00e9 dos Campos, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandra L\u00facia Ventorin von","family":"Zeidler","sequence":"additional","affiliation":[{"name":"Federal University of Esp\u00edrito Santo, Rede Nordeste de Biotecnologia, Vit\u00f3ria, Esp\u00edrito Santo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandre Luiz Souto","family":"Borges","sequence":"additional","affiliation":[{"name":"Department of Dental Materials and Prosthodontics, Institute of Science and Technology, S\u00e3o Paulo State University, S\u00e3o Jos\u00e9 dos Campos, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"La\u00eds Regiane","family":"Silva-Conc\u00edlio","sequence":"additional","affiliation":[{"name":"Department of Dentistry, University of Taubat\u00e9, Taubat\u00e9, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilherme deSiqueira Ferreira Anzaloni","family":"Saavedra","sequence":"additional","affiliation":[{"name":"Department of Dental Materials and Prosthodontics, Institute of Science and Technology, S\u00e3o Paulo State University, S\u00e3o Jos\u00e9 dos Campos, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jo\u00e3o Paulo Mendes","family":"Tribst","sequence":"additional","affiliation":[{"name":"Department of Dentistry, University of Taubat\u00e9, Taubat\u00e9, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2021,9,24]]},"reference":[{"issue":"11","key":"ref1","doi-asserted-by":"crossref","first-page":"e80791110632","DOI":"10.33448\/rsd-v9i11.10632","article-title":"Indications, materials and properties of 3D printing in dentistry: a literature overview","volume":"9","author":"L Arcila","year":"2020","journal-title":"Res Soc 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