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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Int J Oral Maxillofac Surg. 2015 Dec;44(12):1441–1450. doi: 10.1016/j.ijom.2015.06.007

Fig. 1.

Fig. 1

Global reference frame (coordinate system) for the whole head. The reference frame for the whole head includes three orthogonal planes: midsagittal (green), coronal (pink), and axial (blue).