Introduction: The study utilizes noninvasive experimental methods to evaluate the removable partial denture framework stress and distortion areas in order to solve some conception and execution deficiencies. Materials and Methods: There were tested 30 "LiWa" (WP Dental, Beven/Hamburg Germany) wax-patterns and 30 removable partial denture metallic frameworks. They were 3D laser scanned with a LPX 1200 (Roland DG Corporation). Scanned wax-patterns were processed using "Pixform Pro" (Roland DG Corporation) program. They are exported as DXF files and imported by a CAD program Mechanical Engineering Software -SolidWork 2007 (SolidWork Corporation West). Results: The 3D models were used for simulation of external force actions on some RPD components. Wax-pattern or metallic framework stress and deformation analysis allow the distinguish of minimal mechanical strength. Conclusions: Removable partial denture testing, at wax-pattern stage is benefit for determination of the states of tensions, minimum resistance areas, distinguish and appreciation the life time of future dentures. Keywords: finite element analysis, LiWa-wax pattern, removable partial denture