Afterwards, the STL digital files were imported to a reverse engineering morphometric software (3D Geomagic Capture Wrap, 3D Systems©, Rock Hill, SC, USA) and the teeth were individually segmented to allow for the accuracy alignment procedure between the STL digital files from the virtually planned position of the digitalized fixed buccal multibracket appliances (Clarity Advanced, 3M Corp.) and the STL digital files of the fixed buccal multibracket appliances (Clarity Advanced + APC Flash-Free, 3M Corp) bonded to the experimental anatomically based acrylic resin models, according to the recommendations of Zubizarreta-Macho et al. [14 (link)]. The alignment procedure was performed using the palatal surfaces of the anterior teeth and the occlusal and palatal surfaces of the posterior teeth with the best-fit algorithm (Figure 4).
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