Abstract
Background/Aim. In implant prosthetics, there is an increasing use of
materials which, with their mechanical characteristics, can alleviate the
negative consequences of implant stress. The aim of this research was to
conduct a comparative analysis of stress distribution and deformation of
implant supported telescopic systems and surrounding structures, made of
different materials, using the finite element method. Methods. 3D finite
element models were prepared using (SolidWorks 2018, Concord, MA, USA). Two
models of telescopic crowns with the characteristics of polyetheretherketone
(PEEK) polymer and cobaltchrome( Co-Cr) alloy faceted with feldspat ceramics
were used. The models are loaded with an axial force of 150 N in the region
of the central fossa. The analysis of stress and strain distribution was
performed by the finite element method in the Ansis software (ANSYS
Workbench 16; Ansys Inc., Pittsburg, PA, USA).Results. Implant-supported
telescopic crowns made of PEEK polymer significantly reduce stress in the
implant and abutment neck area compared to a conventional cobalt-chrome
(Co-Cr) crown veneered ceramic. At the level of bone structure, both models
showed a concentration of stress at the level of the cortical bone, while
the trabecular bone was significantly less exposed to stress. Under the same
conditions, the degree of deformation of the secondary telescopic crown was
more pronounced in models with PEEK polymer characteristics. Conclusion.
Owing to their mechanical characteristics, PEEK polymers can be the
materials of choice in the fabrication of superstructures on implants. Given
that this in vitro study is accompanied by limitations, further research is
needed to confirm the superior role of PEEK material in implant prosthetics.
Publisher
National Library of Serbia