Since 1985, authors have applied a cast ring around the reconstructed pully involving adjacent one normal digit and allowed early dynamic motion after one stage tenolysis or tendon graft in 24 digits of 16 patients with old flexor tendon injuries in zone II. With this ring technique, authors obtained satisfactory results in 80% of the patients, which proved to be as good as two stage flexor tendon reconstruction with silicone rodding. A cast ring allowed early active motion after tenolysis and early dynamic passive motion after tendon graft. It served as temporary external augmentation of the reconstructed pully and seemed to reduce the tension at the reconstruced tendon and pully. One stage flexor tendon reconstruction and early dynamic motion with ring technique was advantageous in shortening of morbidity and postoperative rehabilitation period, and eliminating complications from silicone rodding