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Fig. 6 | Progress in Orthodontics

Fig. 6

From: Differential assessment of skeletal, alveolar, and dental components induced by microimplant-supported midfacial skeletal expander (MSE), utilizing novel angular measurements from the fulcrum

Fig. 6

a Reference lines to determine rotational fulcrum. Interfrontal distance (IFD) and modified interfrontal distance (MIFD); x, distance between IFD and MIFD. According to the Reuleaux technique, at least two corresponding landmarks must show uniform displacement around a single point, to be able to pinpoint a center of rotation. b Pre-expansion measurements. c Post-expansion measurements. By subtracting the pre-expansion values from the post-expansion values (α’−α = β’−β), equals 4.3° of difference

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