Fig. 4.

Use of a commercial available software (Materialize®) in a revision case of malunion in the right forearm in a 19-year-old young man, who sustained a forearm fractures as a child: Status after two attempted corrective osteotomies, visible deformity, restricted forearm rotation with 45 ° of pronation and 5 ° of supination. a Overlay of both forearms after mirroring of the uninjured left side (blue). b Placing of osteotomies on the deformed radius and ulna. c Simulation of rapid prototyping drill templates on both radius and ulna. d Simulation of rapid prototyping osteotomy guides. e Simulation of the final surgical result with plates and screws in place, anatomic matching of the deformed side and mirrored uninjured site