Functioning free muscle transplantation for restoring upper extremity function.

Functioning free muscle transplantation FFMT is now an important procedure in several fields of reconstructive surgery. In this article, the progress of FFMT in restoring upper extremity function, including essential aspects like indications, preoperative examination, donor muscle selection, donor nerve selection, operative technique, tension of muscle at suturing, postoperative functional assessment, and changes of the transferred muscle after operation are discussed in detail.