A system for repairing separated body tissues includes a tensioning device comprising two proximal handles for grasping, a pair of movable distal tensioning tips, a pivot between the proximal handle and distal tensioning tips, and suture holding clamps proximal to the tensioning tips. The tensioning device is used in conjunction with a buckle with lock bars and a tensioning tab for securing and tensioning suture. The tensioning tab is provided to secure the lock bar in its first position until tension on the suture exceeds a predetermined level.