Dental Prosthesis, Implant-Supported 1 Dental Stress Analysis 1 Dental implantation 1 Denture Precision Attachment 1 Denture bases 1 Denture precision attachment 1 Denture, Overlay 1 Humans 1 Materials Testing 1 Microscopy, Electron, Scanning 1 Saliva, Artificial 1 Tensile Strength 1 Tensile strength 1 dental procedure 1 denture precision attachment evaluation study 1 human 1 implant-supported denture 1 materials testing 1 overlay denture 1 saliva substitute 1 scanning electron microscopy 1 tensile strength 1