Finite Element Analysis of Stress Distribution in the Cast Clasps, Direct Retainers of a Removable Partial Denture

Objectives: The purpose of this study was to evaluate the stress distribution in the critical components of the removable partial denture the cast clasps. Materials andmethod:The three-dimensional models of the clasps were generated using three-dimensional measurements and investigated during loading, using the finite element stress analysis. Results:Although the loading influences the stressdistribution andstress levels, considerable valueswere alwaysobserved in the clasp arms, close to the junctionwith thebody of the clasp. Themaximum stress recorded in all cases was between 310.27MPa and 404.74MPa, below the ductile Yield of the Co-Cr alloy (700MPa). Conclusion:With the use of a properly designed removable partial denture, themagnitude and distribution of the stress in the cast clasps are within the normal limits.