학술논문
The influence of framework material on stress distribution in maxillary complete-arch fixed prostheses supported by four dental implants: a three-dimensional finite element analysis.
Document Type
Article
Author
Source
Subject
*DENTAL implants
*FINITE element method
*STRESS concentration
*PROSTHETICS
*OSSEOINTEGRATED dental implants
*MOLARS
*AXIAL loads
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Language
ISSN
1025-5842
Abstract
The purpose of the present study was to compare the stress distribution patterns of four materials used for the framework of All-on-4 prostheses. Following framework materials were evaluated: PEKK, PEEK, titanium, and monolithic zirconia. Bilateral 150 N axial and oblique loads were applied in the first molar region and analyzed using FEA. The highest maximum principal stress and minimum principal stress values in cortical bone were found to appear with PEKK and PEEK frameworks around the posterior dental implants upon oblique loading. The fabrication of frameworks from rigid materials in All-on-4 prostheses reduces stress in dental implants and peri-implant bone when the distal implants are tilted 30°. [ABSTRACT FROM AUTHOR]