Correlation between reference point indentation and mechanical properties of 3D-printed polymers

Reference point indentation (RPI) is a novel experimental technique designed to evaluate bone quality. This study utilizes two RPI instruments, BioDent and Osteoprobe, investigate the mechanical responses of several 3D-printed polymers. We correlated properties from tensile test with parameters obtained OsteoProbe. In addition, we tested same polymers five years later (Age 5). The results show that for Age 0 polymers, elastic modulus highly average unloading slope (r = 0.87), first 0.85), material strength index (BMSi) loading 0.82), distance 0.79), total 0.76). ultimate stress correlates significantly 0.83), BMSi 0.81), 0.73), 0.71), 0.70). elongation has no significant correlation except creep 0.60). For 5 correlations between are low. illustrates potential assess nondestructively simple sample requirements. Furthermore, time, aged investigated RPI.