Evaluation of Stress distribution and Fatigue Examination on Implant-supported Fixed Partial denture prosthesis (FPD) with a Zirconia Framework.

Abstract

Objectives: This study aims to find stress distribution and fatigue examination on Implant-Supported Fixed Partial denture prosthesis with a Zirconia framework by finite element analysis (FEA) under different loading conditions. Materials & Methods: A 3D finite element model (FEM) is designed. The materials used in the present study are presumed to be homogeneous, linearly elastic, and isotropic. With different angles (0°, 20°, and 45°) and locations, 110 N and 330 N over 0.5 mm² areas are applied to the prosthesis, and the equivalent strain distribution of von Mises is studied. Fatigue examination is also done.

Result: At the connector part of the prosthesis, the most extreme pressure is noticed, when the three-unit Zirconia component is loaded midway (110 N load design: 33.1 MPa, 33.2 MPa, and 52 MPa; 330 N load design: 99 MPa, 103.2 MPa, and 156.1 MPa, separately with 0°, 20° and 45° of tendency). The outcomes affirm the weakness in the two connector areas. The assessment of cyclic loading shows a high chance for fatigue, under different loading conditions. No cracks and fatigue are occurring at a load of 110 N. A load of 330 N applied at the centre of the prosthesis doesn't represent any fatigue issue since the load is shared equally by the entire framework. A load of 330 N applied to one of the two connectors, or the two implants, messes exhaustion up. Conclusion: FEM analysis of a 3-unit implant-supported Y-TZP FPD, give accurate information about loading conditions for clinical success over time. Fatigue examination results show the structural reliability of the Y-TZP as framework material for 3-unit posterior FPDs.