Year: 2025
Type: article
Abstract: The demand for metal-free dental restorations has driven the development of materials that emulate natural tooth structure. This study aimed to compare the stress distribution in implant-supported fixed prostheses made from zirconia and polyoxymethylene (POM) using the finite element method. Three- dimensional models represented screw-retained prostheses on cylindrical external hexagon-type implants in the mandibular region. The experimental group used a POM base, and the control group used zirconia, both with the same geometry. Results indicated a significant increase in stress under the zirconia abutment, with higher intensity transmitted to other components. A 41.96 MPa stress variation was observed in the prosthetic screw with a POM base compared to zirconia. No significant differences were noted in bone tissue stress between the two materials. In conclusion, POM demonstrated superior stress dissipation, potentially reducing mechanical failure risks.
Source: Aracê.
DOI: 10.56238/arev7n3-117
Authors: Cesar Ricardo Rodrigues, Cássio de Barros Pontes, Fabiano Perez, Eduardo Mukai, Ervino Siebel Neto, Jenival Correa De Almeida Júnior, Newton Sesma
Institutions: Universidade de São Paulo, Faculdade São Leopoldo Mandic
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W7077080380
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