IntroductionMany non-surgical methods were performed to repair the deformities in the skeletal system to avoid severe complications post-open surgery, especially within the childhood stage or below. We aim, in this case, to present a new technique for repairing bony deformities in the childhood stage, which fewer studies have to instigate its efficacy versus open surgery.Case presentationWe present a 14-months-old infant with wrist extravasation injury at the neonatal stage (day 1), end with a right wrist volar contraction and complete loss of brain homunculus of the right hand.DiscussionWe used a reverse posterior interosseous flap to reconstruct the soft tissue and release the flexor tendons of the hand. The flap was conducted entirely and was rapidly adapted to the recipient beds to achieve good color and texture harmonies. Within following up for 12 weeks, the patient restored hand function.ConclusionMore global cohort studies are required to compare precisely the efficacy between surgical options and the used technique in our case for salvaging deformities in childhood.