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Experimental setup to investigate progressive collapsing foot deformity (PCFD) ex vivo. (A) Schematic illustration of the design of the testing machine, (1) pressure gauge to measure applied force, (2) piston, (3) cylinder, cranial milled, (4) threaded rod, and (5) washer and nut. (B) Photograph of the setup. (C) Pedobarography of the cadaveric foot under load in the testing machine. (D) Preparation cuts to transect the transverse tarsal arch. (E) Flowchart of the study protocol. (F) Three-dimensional weight-bearing cone-beam computed tomography (WBCT) reconstructions with determination of individual bone axes (upper image) and view of the axial, coronal and transverse planes (lower image). BW, body weight, MLA, medial longitudinal arch, TTA, transverse tarsal arch; WBCT, weight-bearing cone-beam computed tomography.