Fig. 23. When the sutures and expander are released, the proximal tendon retracts. Frequently, it pulls most, if not all, of the expander into the intact proximal tendon capsule, as shown. A short segment of expander is still exposed (arrow). Then, the small opening in the tendon capsule is carefully closed with 6-0 plain gut sutures to completely isolate the cut tendon ends and the expander within the tendon capsule.