Post-traumatic synostosis of the forearm are challenging situations after elbow trauma, injuries of the forearm or the wrist. According to Vince or Hastings classification, therapeutic options are still controversial, due to an unpredictive outcome with recurrence of the synostosis or progressive loss of mobility from post-op to definitive situations.

A retrospective study of 13 cases, including 3 Vince Type 1, 6 Vince Type 2 and 4 Vince type 3 with a minimum follow-up of 3 years was analyzed as well as a review of 47 worldwide publications for defining the optimal therapeutic options. All data files were reviewed including extensive analysis of the CT-scans, and detailed surgical procedures.

For Vince 1 synostosis, in post-traumatic situations, Sauve-Kapandji procedure give excellent or good results when no recurrence of the synostosis is seen. Instability of the proximal ulna after segmental resection is the major complication to be described. In Vince 2 synostosis, an extensive resection of the synostosis is mandatory to obtain a potential good result. Knowledge of the entire anatomy of the forearm is needed for accurate neurolysis of radial nerve and branches. The ulnar approach to the synostosis must be completed with an anterior approach to the radius for a complete resection. In Vince 3 synostosis, resection is easy but recurrence is frequent, due to the associated lesions of the elbow. Based on the litterature review, no additive treatment is necessary for better results Therapeutic options in post-traumatic synostosis of the forearm is a rare complications of elbow lesions (Vince 3), forearm comminutive or complex fractures (Vince 2), or wrist injuries (Vince 1). The latter give the more predictable results after complete resection. Elbow lesions associated with radio-ulnar synostosis are easy to treat but with important recurrence rate, whatever treatment was done. Vince 2 post-traumatic radio-ulnar synostosis are the most challenging situation as bone resection must be extensive meanwhile neurolysis of forearm nerves must be done in the same time. No adjuvant treatment is indicated in either situation according to Vince classification.