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Fig. 8 | Progress in Orthodontics

Fig. 8

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. 8

Diagram displaying the inaccuracy of using linear measurements in order to assess rotational pattern movement. For the same angle θ, points closer to the fulcrum experience a shorter linear displacement than points farther from the fulcrum. ZM, pre-expansion zygomaticomaxillary point; ZM’, post-expansion zygomaticomaxillary point; AB, pre-expansion alveolar bone point; AB’, post-expansion alveolar bone point; D, pre-expansion dental point; D’, post-expansion dental point; x, linear skeletal distance; y, linear alveolar bone distance; z, linear dental distance

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