The Novel Application of Three-Dimensional Printing Assisted Patient-Specific Instrument Osteotomy Guide in the Precise Osteotomy of Adult Talipes Equinovarus

Figure 1

Design and fabrication processes of the 3D printing models and guides. (a) According to the imported CT data, the deformed structure of the ankle joint was simulated in Mimics19.0 software. (b) 1 : 1 reference model printed based on the simulation result. (c) In order to correct the deformity of arch elevation, the osteotomy planes were defined on the joint surfaces. (d) The simulated osteotomy for correcting the deformity of arch elevation was performed at the defined osteotomy planes, and the reduction was performed after osteotomy (frontal view). (e) The result of reduction after the simulated osteotomy (lateral view). (f) In order to correct the deformity of talipes varus, the osteotomy planes were defined on the joint surfaces. (g) The simulated osteotomy for correcting the deformity of talipes varus was performed at defined osteotomy planes, and the reduction was performed after osteotomy. (h) The osteotomy model and guides fabricated by the 3D printing technique.

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