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Measuring Methods and Procedures in Medicine
Smutný, Martin ; Bezrouk, Aleš (advisor) ; Bernard, Vladan (referee) ; Podlesný, Jan (referee)
Measuring methods and procedures in medicine Biodegradable materials and shape memory alloys (SMA) have great potential in medicine, but for their use it is necessary to know their properties thoroughly. This work focused on investigating the mechanical properties of nickel-titanium (NiTi) rotary instruments, NiTi orthodontic coil springs and biodegradable esophageal stents. For NiTi rotary instruments, the aim was to optimize the methodology for testing their cyclic fatigue resistance and shaping ability. For this purpose, 20 copies of resin endoblocks were produced using the 3D JetPrinting method. These copies were then compared with commercially available originals. A statistically significantly lower dimensional variability of printed blocks was found compared to commercial endoblocks, confirming the high reproducibility of their production process. For NiTi orthodontic coil springs, the deactivation plateau is the most important from a clinical point of view. It is the part of the load curve in which the acting force of the spring is independent of its extension and is used to move the treated tooth into the correct position. Therefore, the aim of this work was first to establish a methodology for the unambiguous determination of the deactivation plateau. With the developed methodology, it was...
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