| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 101 === Nickel-titanium files are the primary tools when people undergo root canal treatment for teeth. Its function is to bore the root canal and clean infected pulp. This study is to investigate the mechanical properties of nickel-titanium files and provide some experimental data for designers or dentists that can regulate torque value conveniently.
This research explores the characteristics of nickel-titanium files by theoretical solutions, computer simulation, and experimental measurement. These results coincide with each other so the experimental data is trustworthiness. Therefore this research aims to investigate file mechanical properties. This study investigates the relationship between torsional torque and torsional deformation by experiments. Also, this study investigates the relationship between the measured force at the file tip and bending angle in experiments. When nickel-titanium files are subject to torsional moment, the results of nonlinear deformation are close to the tendency of linear analytic solutions. Based on this reason and for safety reason of avoiding file failure, dentists can refer to the two-thirds analytic values as torque regulation for endodontic treatments.
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