BACKGROUND: Spastic hemiplegia is a common feature after stroke, which can result in a clenched fist deformity with secondary hygienic problems and pain. Operative treatment can improve these problems, although literature about its long-term effects is lacking. PURPOSE: To determine whether Superficialis-to-Profundus tendon (StP-) transfer procedure leads to permanent improvement of hygiene and reduction of pain in patients with clenched fist due to spastic hemiplegia following stroke. METHOD: Patients who underwent a StP-transfer in 2003-2005 were evaluated on skin condition, upper extremity joint mobility, resting position and muscle tone and with VAS scores on hygiene maintenance and pain in the hand. RESULTS: Six patients (mean age 54 years; duration after stroke 10 years) were included. Indications to operate were hygienic problems only (3) or combined with pain (3). The average follow-up period was 19 months. After 6 weeks of post-operative splinting, no standard follow-up was applied. Serious post-operative complications were not reported. At follow-up no hygienic problems were present and pain was decreased in all except one patient. All hands could passively be fully opened. In resting position, flexion was seen in the MCP-joints (60-90 degrees). Muscle tone was raised in flexors of the wrist and fingers and m. adductor pollicis (Ashworth 1-2). Given the same pre- and post-operative circumstances, all patients would agree to have the surgery over again. CONCLUSION: Even 19 months after the StP-transfer for clenched fist, all operated hands could still be fully opened and there was a permanent improvement of hygiene and pain reduction.