Flexor tendons injuries are common, To understand the repair of the flexor tendons we must know the anatomy, biomechanics and healing of the tendons.The strength of flexor tendon repair is directly proportional to the number of strands crossing the repair site.The dilemma in flexor tendon surgery is to perform a repair that uses the least amount of suture material, but that is strong enough to prevent a 2mm gap from forming during postoperative mobilisation protocols. A variety of satisfactory suture materials are available for tendon repair. Polyester Suture is a non absorbable, braided, sterile, surgical suture composed of Poly (ethylene, terephthalate). It is prepared from fibers of high molecular weight, long-chain, linear polyesters having recurrent aromatic rings as an integral component.