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. 2016 Aug 3;4:e2312. doi: 10.7717/peerj.2312

Figure 4. Determining the ROM using Zbrush and Rhino 5.0 using metatarsal II (MTII) and II-1 as an example.

Figure 4

(A) Metatarsal II and phalanx II-1 in extended and flexed positions with a sphere representing the range of motion surface of the condyle end of MTII. (B) Separate overlapping spheres drawn as attachments to the central sphere which bisecting along the axis of the distal positions of II-1. (C) Converted from sphere to a mesh. (D) The mesh exported from Zbrush 4R7 into Rhinoceros 5.0. Lines are drawn centrally dissecting the meshes so the ROM can be determined using the angle function. (E) Medial view of a soft tissue articulation angle. The soft tissue angle (Table 2) is replicated with a 3-D protractor with the joint’s corresponding soft tissue angle, which was aligned with the interphalangeal rotation point. The phalanx is re-oriented to its suspected soft tissue articulation. (F) Oblique view of soft tissue ROM adjustment. Abbreviations: bone (b) ROM; sto, soft tissue ROM angle.