[The protected tendinous graft in zone 2 or fibroblast trap]

We present a simple technique for preventing adhesions to tendon grafts in zone 2. A silicone tube is cut longitudinally and the third of its diameter is removed. It is then introduced under the pulley with the slot towards the skeleton. The tendon graft is introduced into this tube which will protect it from adhesions except at the slot level where fibroblasts create a new vasculature.

Between April 2002 and April 2003, we have used this technique in three patients, two in their thumbs and one in the long finger. In the Boyes classification, one thumb lesion corresponded to stage 1 and the other two cases to stage 4. The main pulleys were preserved. The tube measured 12 cm in length, and extended from the proximal juncture to the distal one (Pulvertaft technique). After 5 weeks of strict immobilization, the tube was withdrawn and the patients began active mobilization.

After 8 weeks, comparison of the results with the opposite hand showed: Normal extension in all cases. Flexion deficit of 15 degrees in the thumb interphalangeal joints. Flexion deficit of 20 degrees in the proximal and distal interphalangeal joints of the long finger. There were no reported complications. With a mean follow-up of 1 year, these results were stable.

These results support the contention that a good blood supply to the tendon and a good gliding surface have been developed with this technique. The tube seems to work as a fibroblast trap and blocks harmful adhesions.