Totally 120 patients all suffering from simple flexor digitorum tendon rupture on the hand zone two damaged by sharp weapons were randomly assigned to Group A ( Dikang adsorbable biomembrane ) , Group B ( Tianxinfu adsorbable biomembrane ) , Group C ( Tianxinfu adsorbable biomembrane + Ligustrazine group ) , and Group D ( Tianxinfu adsorbable biomembrane + DI group ) in accordance with random digit table , 30 cases in each group .